{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T23:18:32Z","timestamp":1788218312157,"version":"build-2803163510"},"reference-count":72,"publisher":"American Chemical Society (ACS)","issue":"33","license":[{"start":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T00:00:00Z","timestamp":1786492800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100018859","name":"Tamkeen","doi-asserted-by":"publisher","award":["NA"],"award-info":[{"award-number":["NA"]}],"id":[{"id":"10.13039\/501100018859","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,8,25]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The immobilization of amine active sites onto porous supports, such as polyethylenimine (PEI) impregnated mesoporous silica, is well explored for carbon dioxide adsorption. However, a qualitative investigation of the molecular-level interactions among PEI, water molecules, and CO2 within the pore walls of mesoporous silica remains challenging. Probing such interactions requires spectroscopic methods that can access the local environment of the PEI\/silica composite. A systematic investigation is needed to elucidate the atomistic picture of physically impregnated PEI within silica pores, particularly in relation to CO2 adsorption processes. Based on existing literature and feasible scenarios, we formed three distinct cases for the physical impregnation of PEI into the pores of silica. We synthesized a model system comprising porous silica impregnated with PEI at various weight percentages. We performed solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy experiments on a series of PEI-impregnated porous silica materials. The observed peak shifts and line shape changes in the 1H and 13C MAS NMR spectra, together with the complementary spectroscopic data, indicate that PEI forms a conformal layer along the silica pore walls at lower loadings and agglomerates within the pores at higher loadings. Moreover, PEI agglomeration becomes pronounced at PEI loadings above 40 wt %. A custom-built CO2 adsorption setup was used to perform CO2 adsorption on PEI\/silica composites packed within solid-state NMR rotors. Complementary quantum mechanical calculations support the experimental observations and indicate the formation of carbamic acid species, characterized by a 13C resonance at 164 ppm. These molecular-level insights into the interactions within the PEI\/silica CO2 system provide a framework for the design of high-performance amine-functionalized adsorbents for carbon capture applications.<\/jats:p>","DOI":"10.1021\/acsomega.6c04679","type":"journal-article","created":{"date-parts":[[2026,8,12]],"date-time":"2026-08-12T17:01:49Z","timestamp":1786554109000},"page":"49872-49880","source":"Crossref","is-referenced-by-count":0,"title":["Insights into CO2 Adsorption Motifs in\nFunctionalized Mesoporous Silica Using Solid-State NMR"],"prefix":"10.1021","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8524-6074","authenticated-orcid":true,"given":"Mohammed","family":"Jasil","sequence":"first","affiliation":[{"name":"New York University , , , ,","place":["New York, New York, United States, 10003"]},{"name":"New York University Abu Dhabi (NYUAD) , , ,","place":["Abu Dhabi, United Arab Emirates, 129188"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9668-3763","authenticated-orcid":true,"given":"Athulya","family":"Nadol","sequence":"additional","affiliation":[{"name":"New York University Abu Dhabi (NYUAD) , , ,","place":["Abu Dhabi, United Arab Emirates, 129188"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-4713-125X","authenticated-orcid":true,"given":"Hyeseung","family":"Jeong","sequence":"additional","affiliation":[{"name":"New York University Abu Dhabi (NYUAD) , , ,","place":["Abu Dhabi, United Arab Emirates, 129188"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3590-0992","authenticated-orcid":true,"given":"Brijith","family":"Thomas","sequence":"additional","affiliation":[{"name":"New York University , , , ,","place":["New York, New York, United States, 10003"]},{"name":"New York University Abu Dhabi (NYUAD) , , ,","place":["Abu Dhabi, United Arab Emirates, 129188"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,8,12]]},"reference":[{"key":"2026083119123100000_cit1","doi-asserted-by":"publisher","first-page":"6326","DOI":"10.1021\/acsami.4c18450","article-title":"\u201cCu-Nx\u201d Site-Driven\nSelectivity Switch for Electrocatalytic CO2 Reduction","volume":"17","author":"Ma","year":"2025","journal-title":"ACS Appl. Mater. Interfaces"},{"issue":"6600","key":"2026083119123100000_cit2","doi-asserted-by":"publisher","first-page":"1404","DOI":"10.1126\/science.abo3378","article-title":"Current Global Efforts\nAre Insufficient to Limit Warming to 1.5\u00b0C","volume":"376","author":"Matthews","year":"2022","journal-title":"Science"},{"issue":"12","key":"2026083119123100000_cit3","doi-asserted-by":"publisher","first-page":"798","DOI":"10.1038\/s41569-022-00720-x","article-title":"Climate Change and Cardiovascular\nDisease: Implications for Global Health","volume":"19","author":"Khraishah","year":"2022","journal-title":"Nat.\nRev. Cardiol."},{"key":"2026083119123100000_cit4","doi-asserted-by":"publisher","DOI":"10.1016\/j.scitotenv.2024.173359","article-title":"Greenhouse Gases Emissions and Global Climate Change: Examining the\nInfluence of CO2, CH4, and N2O","volume":"935","author":"Filonchyk","year":"2024","journal-title":"Sci. Total Environ."},{"issue":"25","key":"2026083119123100000_cit5","doi-asserted-by":"publisher","first-page":"26266","DOI":"10.1021\/acsomega.5c03166","article-title":"Advances of Ionic-Mediated Polymer\nArchitectures for CO2 Gas Separation Membranes: A Comprehensive Review\nof Design, Progress, and Future Prospects","volume":"10","author":"Saddeeq","year":"2025","journal-title":"ACS\nOmega"},{"key":"2026083119123100000_cit6","unstructured":"Trends in CO2; NOAA Global Monitoring Laboratory. https:\/\/gml.noaa.gov\/ccgg\/trends\/. (accessed July 12, 2026)."},{"issue":"50","key":"2026083119123100000_cit7","doi-asserted-by":"publisher","first-page":"75161","DOI":"10.1007\/s11356-022-23116-3","article-title":"Aqueous Carbonation\nof Peridotites\nfor Carbon Utilisation: A Critical Review","volume":"29","author":"Rashid","year":"2022","journal-title":"Environ.\nSci. Pollut. Res."},{"issue":"11","key":"2026083119123100000_cit8","doi-asserted-by":"publisher","DOI":"10.1016\/j.heliyon.2023.e21796","article-title":"Developments\nin Mineral Carbonation for Carbon Sequestration","volume":"9","author":"Rashid","year":"2023","journal-title":"Heliyon"},{"key":"2026083119123100000_cit9","doi-asserted-by":"publisher","DOI":"10.1016\/j.nexres.2025.101177","article-title":"Novel Insights\ninto In-Situ and Ex-Situ Production of Geological Ammonia from Rocks","volume":"3","author":"Rashid","year":"2026","journal-title":"Next Res."},{"issue":"8037","key":"2026083119123100000_cit10","doi-asserted-by":"publisher","first-page":"96","DOI":"10.1038\/s41586-024-08080-x","article-title":"Carbon Dioxide Capture from Open\nAir Using Covalent Organic Frameworks","volume":"635","author":"Zhou","year":"2024","journal-title":"Nature"},{"issue":"15","key":"2026083119123100000_cit11","doi-asserted-by":"publisher","first-page":"2855","DOI":"10.1002\/adma.201505004","article-title":"Covalent Organic Frameworks for CO2 Capture","volume":"28","author":"Zeng","year":"2016","journal-title":"Adv. Mater."},{"key":"2026083119123100000_cit12","doi-asserted-by":"publisher","first-page":"27006","DOI":"10.1021\/jacs.4c08757","article-title":"Integrated CO2 Capture\nand Conversion by a Robust Cu(I)-Based Metal-Organic Framework","volume":"146","author":"Sengupta","year":"2024","journal-title":"J. Am. Chem. Soc."},{"issue":"10","key":"2026083119123100000_cit13","doi-asserted-by":"publisher","first-page":"2783","DOI":"10.1039\/C8CS00829A","article-title":"Carbon Capture and\nConversion Using Metal\u2013Organic Frameworks and MOF-Based Materials","volume":"48","author":"Ding","year":"2019","journal-title":"Chem. Soc. Rev."},{"key":"2026083119123100000_cit14","doi-asserted-by":"publisher","first-page":"1260","DOI":"10.1016\/j.cej.2017.10.103","article-title":"CO2 Capture Using Triamine-Grafted\nSBA-15: The Impact of the Support Pore Structure","volume":"334","author":"Jahandar Lashaki","year":"2018","journal-title":"Chem. Eng. J."},{"issue":"13","key":"2026083119123100000_cit15","doi-asserted-by":"publisher","first-page":"1717","DOI":"10.1002\/adfm.200600427","article-title":"CO2 Capture by As-Prepared SBA-15 with an\nOccluded Organic Template","volume":"16","author":"Yue","year":"2006","journal-title":"Adv. Funct. Mater."},{"issue":"16","key":"2026083119123100000_cit16","doi-asserted-by":"publisher","first-page":"8764","DOI":"10.1021\/jacs.3c00281","article-title":"Assessing CO2 Capture in Porous Sorbents via Solid-State\nNMR-Assisted Adsorption Techniques","volume":"145","author":"Ilkaeva","year":"2023","journal-title":"J. Am. Chem.\nSoc."},{"key":"2026083119123100000_cit17","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2022.138393","article-title":"Unprecedented Improvement\nof the Hydrothermal Stability of Amine-Grafted MCM-41 Silica for CO2 Capture via Aluminum Incorporation","volume":"450","author":"Jahandar Lashaki","year":"2022","journal-title":"Chem. Eng. J."},{"issue":"5","key":"2026083119123100000_cit18","doi-asserted-by":"publisher","DOI":"10.1016\/j.jece.2023.110350","article-title":"Tailoring the Pore Structure of Amine-Functionalized\nKCC Fibrous Nanosilica for Efficient CO2 Adsorption","volume":"11","author":"Azhagapillai","year":"2023","journal-title":"J. Environ. Chem. Eng."},{"issue":"5","key":"2026083119123100000_cit19","doi-asserted-by":"publisher","first-page":"2634","DOI":"10.1021\/acsaem.2c03605","article-title":"Zeolites\nas Selective Adsorbents\nfor CO2 Separation","volume":"6","author":"Boer","year":"2023","journal-title":"ACS Appl. Energy\nMater."},{"issue":"22","key":"2026083119123100000_cit20","doi-asserted-by":"publisher","first-page":"9340","DOI":"10.1039\/D2CS00508E","article-title":"Carbon Dioxide Capture with Zeotype Materials","volume":"51","author":"Fu","year":"2022","journal-title":"Chem. Soc. Rev."},{"issue":"35","key":"2026083119123100000_cit21","doi-asserted-by":"publisher","first-page":"12125","DOI":"10.1021\/jacs.7b06382","article-title":"The Chemistry\nof CO2 Capture in an Amine-Functionalized Metal-Organic\nFramework under Dry and Humid Conditions","volume":"139","author":"Flaig","year":"2017","journal-title":"J.\nAm. Chem. Soc."},{"key":"2026083119123100000_cit22","doi-asserted-by":"publisher","first-page":"16380","DOI":"10.1021\/acsami.4c20801","article-title":"Amine-Functionalized\nCellulose as Promising Materials for Direct CO2 Capture:\nA Review","volume":"17","author":"Akaya","year":"2025","journal-title":"ACS Appl. Mater. Interfaces"},{"issue":"4","key":"2026083119123100000_cit23","doi-asserted-by":"publisher","first-page":"2137","DOI":"10.1021\/am507465f","article-title":"Amine-Based\nCO2 Capture Technology Development\nfrom the Beginning of 2013-A Review","volume":"7","author":"Dutcher","year":"2015","journal-title":"ACS Appl.\nMater. Interfaces"},{"issue":"44","key":"2026083119123100000_cit24","doi-asserted-by":"publisher","first-page":"24748","DOI":"10.1021\/acsami.5b07545","article-title":"Role of\nAdditives in Composite PEI\/Oxide CO2 Adsorbents: Enhancement\nin the Amine Efficiency of Supported PEI\nby PEG in CO2 Capture from Simulated Ambient Air","volume":"7","author":"Sakwa-Novak","year":"2015","journal-title":"ACS Appl. Mater. Interfaces"},{"issue":"6","key":"2026083119123100000_cit25","doi-asserted-by":"publisher","first-page":"3220","DOI":"10.1021\/ie101240d","article-title":"Amine-Modified\nSBA-15: Effect of Pore Structure on the Performance for CO2 Capture","volume":"50","author":"Yan","year":"2011","journal-title":"Ind. Eng. Chem. Res."},{"issue":"22","key":"2026083119123100000_cit26","doi-asserted-by":"publisher","first-page":"13684","DOI":"10.1021\/acs.est.5b02930","article-title":"Characterization of a Mixture of\nCO2 Adsorption Products in Hyperbranched Aminosilica Adsorbents\nby 13C Solid-State NMR","volume":"49","author":"Moore","year":"2015","journal-title":"Environ.\nSci. Technol."},{"issue":"12","key":"2026083119123100000_cit27","doi-asserted-by":"publisher","first-page":"6298","DOI":"10.1021\/jacsau.5c01294","article-title":"Climatic Conditions and Amine Loading Impact the Performance\nof Laminate-Supported Poly(Ethylenimine) Direct Air Capture Sorbents","volume":"5","author":"Ryu","year":"2025","journal-title":"JACS Au"},{"issue":"6","key":"2026083119123100000_cit28","doi-asserted-by":"publisher","first-page":"9778","DOI":"10.1021\/acsami.5c21809","article-title":"Silk-Nano-Fibroin Aerogels: A Bio-Derived,\nAmine-Rich Platform for Rapid and Reversible CO2 Capture","volume":"18","author":"Sheikh","year":"2026","journal-title":"ACS Appl. Mater. Interfaces"},{"key":"2026083119123100000_cit29","doi-asserted-by":"publisher","first-page":"326","DOI":"10.1016\/j.chemosphere.2016.10.083","article-title":"Food Wastes Derived Adsorbents for\nCarbon Dioxide and\nBenzene Gas Sorption","volume":"168","author":"Opatokun","year":"2017","journal-title":"Chemosphere"},{"issue":"17","key":"2026083119123100000_cit30","doi-asserted-by":"publisher","first-page":"7260","DOI":"10.1021\/jp809946y","article-title":"Infrared Study of CO2 Sorption over \u201cMolecular\nBasket\u201d Sorbent Consisting of Polyethylenimine-Modified Mesoporous\nMolecular Sieve","volume":"113","author":"Wang","year":"2009","journal-title":"J. Phys. Chem. C"},{"issue":"12","key":"2026083119123100000_cit31","doi-asserted-by":"publisher","first-page":"9563","DOI":"10.1021\/am501941c","article-title":"Controlled\nEtching of Internal and\nExternal Structures of SiO2 Nanoparticles Using Hydrogen\nBond of Polyelectrolytes","volume":"6","author":"Islam","year":"2014","journal-title":"ACS Appl. Mater. Interfaces"},{"issue":"46","key":"2026083119123100000_cit32","doi-asserted-by":"publisher","DOI":"10.1002\/smll.202401422","article-title":"CO2 Uptake\nand Stability Enhancement in\nVinyltrimethoxysilane-Treated SBA-15 Solid Amine-Based Sorbents","volume":"20","author":"Vallace","year":"2024","journal-title":"Small"},{"issue":"21","key":"2026083119123100000_cit33","doi-asserted-by":"publisher","first-page":"8007","DOI":"10.1021\/ie0504194","article-title":"Applications\nof Pore-Expanded Mesoporous\nSilica. 2. Development of a High-Capacity, Water-Tolerant Adsorbent\nfor CO2","volume":"44","author":"Franchi","year":"2005","journal-title":"Ind. Eng. Chem. Res."},{"key":"2026083119123100000_cit34","doi-asserted-by":"publisher","DOI":"10.1016\/j.jenvman.2022.116438","article-title":"Characteristics,\nApplication and Modeling of Solid Amine Adsorbents for CO2 Capture: A Review","volume":"325","author":"Lin","year":"2023","journal-title":"J. Environ. Manage."},{"issue":"36","key":"2026083119123100000_cit35","doi-asserted-by":"publisher","first-page":"11749","DOI":"10.1021\/jacs.5b06823","article-title":"Linking CO2 Sorption Performance\nto Polymer Morphology in Aminopolymer\/Silica Composites through Neutron\nScattering","volume":"137","author":"Holewinski","year":"2015","journal-title":"J. Am. Chem. Soc."},{"issue":"21","key":"2026083119123100000_cit36","doi-asserted-by":"publisher","first-page":"10197","DOI":"10.1021\/acs.jpcc.3c01327","article-title":"Interplay\nbetween the Pore Network Modifications and Dynamics of Confined Polyethyleneimine\nin Self-Assembled Polyethyleneimine-Silica Nanoparticle Microspheres","volume":"127","author":"Sharma","year":"2023","journal-title":"J. Phys. Chem. C"},{"issue":"24","key":"2026083119123100000_cit37","doi-asserted-by":"publisher","first-page":"11652","DOI":"10.1021\/acs.jpcc.3c02441","article-title":"Probing\nthe Morphology and Mobility\nof Amines in Porous Silica CO2 Sorbents by 1H T1\u2013T2 Relaxation Correlation NMR","volume":"127","author":"Moon","year":"2023","journal-title":"J. Phys. Chem. C"},{"issue":"40","key":"2026083119123100000_cit38","doi-asserted-by":"publisher","first-page":"36515","DOI":"10.1021\/acsami.9b08496","article-title":"Discovering Inherent\nCharacteristics\nof Polyethylenimine-Functionalized Porous Materials for CO2 Capture","volume":"11","author":"Zhang","year":"2019","journal-title":"ACS Appl. Mater. Interfaces"},{"issue":"1","key":"2026083119123100000_cit39","doi-asserted-by":"publisher","DOI":"10.1038\/s43586-020-00002-1","article-title":"Solid-State NMR Spectroscopy","volume":"1","author":"Reif","year":"2021","journal-title":"Nat. Rev. Methods Primers"},{"issue":"8","key":"2026083119123100000_cit40","doi-asserted-by":"publisher","first-page":"7485","DOI":"10.1021\/acsomega.4c11221","article-title":"Solid State NMR for Mechanistic Exploration\nof CO2 Adsorption on Amine-Based Silica Adsorbents","volume":"10","author":"Jasil","year":"2025","journal-title":"ACS Omega"},{"issue":"35","key":"2026083119123100000_cit41","doi-asserted-by":"publisher","first-page":"4843","DOI":"10.1039\/b707322d","article-title":"Structural\nand Dynamical Properties of Guest Molecules Confined in Mesoporous\nSilica Materials Revealed by NMR","volume":"9","author":"Buntkowsky","year":"2007","journal-title":"Phys. Chem.\nChem. Phys."},{"issue":"30","key":"2026083119123100000_cit42","doi-asserted-by":"publisher","first-page":"4015","DOI":"10.1039\/D3CC05942A","article-title":"Unravelling the Structure of CO2 in Silica Adsorbents:\nAn NMR and Computational Perspective","volume":"60","author":"Sardo","year":"2024","journal-title":"Chem.\nCommun."},{"key":"2026083119123100000_cit43","doi-asserted-by":"publisher","DOI":"10.1016\/j.ssnmr.2022.101808","article-title":"Combining Heteronuclear Correlation\nNMR with Spin-Diffusion to Detect Relayed Cl\u2013H\u2013H and\nN\u2013H\u2013H Proximities in Molecular Solids","volume":"120","author":"Raval","year":"2022","journal-title":"Solid State Nucl. Magn. Reson."},{"issue":"37","key":"2026083119123100000_cit44","doi-asserted-by":"publisher","first-page":"25656","DOI":"10.1021\/jacs.4c07411","article-title":"Local Structure in Crystalline, Glass\nand Melt States of a Hybrid Metal Halide Perovskite","volume":"146","author":"Singh","year":"2024","journal-title":"J. Am. Chem. Soc."},{"key":"2026083119123100000_cit45","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijpharm.2023.123403","article-title":"Probing\nFluconazole Deposition inside\nMesoporous Silica Using Solid-State NMR Spectroscopy: Crystallization\nof a Confined Metastable Form and Phase Transformations under Storage\nConditions","volume":"645","author":"Nowak","year":"2023","journal-title":"Int. J. Pharm."},{"issue":"0","key":"2026083119123100000_cit46","doi-asserted-by":"publisher","first-page":"495","DOI":"10.1039\/D4FD00081A","article-title":"Probing Assembly\/Disassembly\nof Ordered Molecular Hydrogels","volume":"255","author":"Ramalhete","year":"2025","journal-title":"Faraday Discuss."},{"issue":"3","key":"2026083119123100000_cit47","doi-asserted-by":"publisher","DOI":"10.1016\/j.xcrp.2026.103152","article-title":"Artificial\nIntelligence for NMR Chemical\nShift Prediction","volume":"7","author":"Piroozi","year":"2026","journal-title":"Cell Rep. Phys. Sci."},{"issue":"8","key":"2026083119123100000_cit48","doi-asserted-by":"publisher","first-page":"6463","DOI":"10.1021\/acsomega.1c03370","article-title":"Water Vapor Adsorption\nCapacity Loss\nof Molecular Sieves 4A, 5A, and 13X Resulting from Methanol and Heptane\nExposure","volume":"7","author":"Azhagapillai","year":"2022","journal-title":"ACS Omega"},{"key":"2026083119123100000_cit49","unstructured":"Frisch, M. J.; Trucks, G. W.; Schlegel, H. B.; Scuseria, G. E.; Robb, M. A.; Cheeseman, J. R.; Scalmani, G.; Barone, V.; Petersson, G. A.; Nakatsuji, H.; Li, X.; Caricato, M.; Marenich, A. V.; Bloino, J.; Janesko, B. G.; Gomperts, R.; Mennucci, B.; Hratchian, H. P.; Ortiz, J. V.; Izmaylov, A. F.; Sonnenberg, J. L.; Williams; ; Ding, F.; Lipparini, F.; Egidi, F.; Goings, J.; Peng, B.; Petrone, A.; Henderson, T.; Ranasinghe, D.; Zakrzewski, V. G.; Gao, J.; Rega, N.; Zheng, G.; Liang, W.; Hada, M.; Ehara, M.; Toyota, K.; Fukuda, R.; Hasegawa, J.; Ishida, M.; Nakajima, T.; Honda, Y.; Kitao, O.; Nakai, H.; Vreven, T.; Throssell, K.; Montgomery Jr, J. A.; Peralta, J. E.; Ogliaro, F.; Bearpark, M. J.; Heyd, J. J.; Brothers, E. N.; Kudin, K. N.; Staroverov, V. N.; Keith, T. A.; Kobayashi, R.; Normand, J.; Raghavachari, K.; Rendell, A. P.; Burant, J. C.; Iyengar, S. S.; Tomasi, J.; Cossi, M.; Millam, J. M.; Klene, M.; Adamo, C.; Cammi, R.; Ochterski, J. W.; Martin, R. L.; Morokuma, K.; Farkas, O.; Foresman, J. B.; Fox, D. J.\n          Gaussian\n16 Rev. C.01. Gaussian Inc.: Wallingford, CT, 2016."},{"key":"2026083119123100000_cit50","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2023.147498","article-title":"Spectroscopic Investigation\ninto the Oxidation of Polyethylenimine\nfor CO2 Capture: Mitigation Strategies and Mechanism","volume":"479","author":"Yan","year":"2024","journal-title":"Chem. Eng. J."},{"issue":"3","key":"2026083119123100000_cit51","doi-asserted-by":"publisher","first-page":"419","DOI":"10.1007\/s42823-020-00170-w","article-title":"Surface Functionalization\nMethodologies\non Activated Carbons and Their Benzene Adsorption","volume":"31","author":"Azhagapillai","year":"2021","journal-title":"Carbon Lett."},{"key":"2026083119123100000_cit52","doi-asserted-by":"publisher","first-page":"43","DOI":"10.1016\/j.matlet.2015.01.156","article-title":"Preparation\nand Characterization\nof Silica Aerogel-ZIF-8 Hybrid Materials","volume":"146","author":"Prabhu","year":"2015","journal-title":"Mater.\nLett."},{"issue":"1","key":"2026083119123100000_cit53","doi-asserted-by":"publisher","DOI":"10.1038\/s41598-023-51119-8","article-title":"Transport and Retention of Silica\nNanoparticles in Glass-Bead Columns: Effects of Particle Size, Type,\nand Concentration of Ionic Species","volume":"14","author":"Daneshfar","year":"2024","journal-title":"Sci. Rep."},{"key":"2026083119123100000_cit54","doi-asserted-by":"publisher","DOI":"10.1016\/j.nxmate.2024.100146","article-title":"Synthesis and Characterization\nof Modified Silica Gel from Teff Straw Ash Using Sol-Gel Method","volume":"3","author":"Tessema","year":"2024","journal-title":"Next Mater."},{"key":"2026083119123100000_cit55","doi-asserted-by":"publisher","DOI":"10.1016\/j.apcatb.2022.121692","article-title":"Influence\nof Support Textural Property on CO2 to Methane Activity\nof Ni\/SiO2 Catalysts","volume":"317","author":"Cherevotan","year":"2022","journal-title":"Appl. Catal.,\nB"},{"issue":"51","key":"2026083119123100000_cit56","doi-asserted-by":"publisher","first-page":"35389","DOI":"10.1021\/acsomega.1c04743","article-title":"Polyethyleneimine-Modified\nAmorphous Silica for the Selective Adsorption\nof CO2\/N2 at High Temperatures","volume":"6","author":"Li","year":"2021","journal-title":"ACS Omega"},{"issue":"17","key":"2026083119123100000_cit57","doi-asserted-by":"publisher","first-page":"6891","DOI":"10.1021\/ma4011796","article-title":"Comprehensive NMR Studies\nof the Structures and Properties of PEI\nPolymers","volume":"46","author":"Holycross","year":"2013","journal-title":"Macromolecules"},{"issue":"16","key":"2026083119123100000_cit58","doi-asserted-by":"publisher","DOI":"10.1126\/sciadv.adk2350","article-title":"Carbon Capture in\nPolymer-Based Electrolytes","volume":"10","author":"Wang","year":"2024","journal-title":"Sci. Adv."},{"issue":"12","key":"2026083119123100000_cit59","doi-asserted-by":"publisher","first-page":"6800","DOI":"10.1021\/acsomega.0c00147","article-title":"Polyethyleneimine-Stabilized\nPlatinum Nanoparticles as Peroxidase Mimic for Colorimetric Detection\nof Glucose","volume":"5","author":"Cui","year":"2020","journal-title":"ACS Omega"},{"issue":"30","key":"2026083119123100000_cit60","doi-asserted-by":"publisher","first-page":"16759","DOI":"10.1021\/acs.jpcc.1c04145","article-title":"NMR Reveals\nTwo\nBicarbonate Environments in SBA15-Solid-Amine CO2 Sorbents","volume":"125","author":"Chen","year":"2021","journal-title":"J. Phys. Chem. C"},{"issue":"18","key":"2026083119123100000_cit61","doi-asserted-by":"publisher","first-page":"5880","DOI":"10.1021\/ja8007243","article-title":"Mapping\nthe Evolution of Adsorption\nof Water in Nanoporous Silica by in Situ Solid-State 1H NMR Spectroscopy","volume":"130","author":"Xu","year":"2008","journal-title":"J. Am. Chem. Soc."},{"issue":"22","key":"2026083119123100000_cit62","doi-asserted-by":"publisher","first-page":"5689","DOI":"10.1002\/chem.200400351","article-title":"Hydrogen Bonding\nof Water Confined in Mesoporous Silica MCM-41 and SBA-15 Studied by\n1H Solid-State NMR","volume":"10","author":"Gru\u0308nberg","year":"2004","journal-title":"Chem. - Eur. J."},{"issue":"14","key":"2026083119123100000_cit63","doi-asserted-by":"publisher","first-page":"7403","DOI":"10.1007\/s10973-023-12193-2","article-title":"Quasi-Isothermal (Q-TG),\nCryoporometric (DSC) and Adsorption Characterization of Activated\nCarbons","volume":"148","author":"Charmas","year":"2023","journal-title":"J. Therm. Anal. Calorim."},{"issue":"45","key":"2026083119123100000_cit64","doi-asserted-by":"publisher","first-page":"24677","DOI":"10.1021\/acs.jpcc.0c04942","article-title":"Unraveling the Structure and Binding Energy of Adsorbed\nCO2\/H2O on Amine Sorbents","volume":"124","author":"Miller","year":"2020","journal-title":"J. Phys. Chem. C"},{"issue":"44","key":"2026083119123100000_cit65","doi-asserted-by":"publisher","first-page":"60400","DOI":"10.1021\/acsami.5c10971","article-title":"Tailored Design\nof Mesoporous Aminated\nImidazolium Poly(Ionic Liquid)s: Practical Chemisorption Metric and\nDetailed Insights into CO2 Sorption Behavior","volume":"17","author":"Stiernet","year":"2025","journal-title":"ACS Appl. Mater. Interfaces"},{"issue":"6","key":"2026083119123100000_cit66","doi-asserted-by":"publisher","first-page":"1387","DOI":"10.1021\/cm1029563","article-title":"Adsorption\nand Activation of CO2 by Amine-Modified Nanoporous Materials\nStudied by Solid-State NMR and 13CO2 Adsorption","volume":"23","author":"Pinto","year":"2011","journal-title":"Chem. Mater."},{"key":"2026083119123100000_cit67","doi-asserted-by":"publisher","DOI":"10.1016\/j.cej.2020.126938","article-title":"Reaction Mechanisms\nof Carbon Dioxide Capture by Amino Acid Salt and Desorption by Heat\nor Mineralization","volume":"405","author":"Li","year":"2021","journal-title":"Chem. Eng. J."},{"issue":"30","key":"2026083119123100000_cit68","doi-asserted-by":"publisher","first-page":"32881","DOI":"10.1021\/acsomega.4c03551","article-title":"Development and\nCharacterization of Polyethylenimine-Infiltrated\nMesoporous Silica Foam Pellets for CO2 Capture","volume":"9","author":"Komma","year":"2024","journal-title":"ACS Omega"},{"issue":"20","key":"2026083119123100000_cit69","doi-asserted-by":"publisher","first-page":"12411","DOI":"10.1021\/la202972t","article-title":"Polyethylenimine-Impregnated\nMesoporous\nSilica: Effect of Amine Loading and Surface Alkyl Chains on CO2 Adsorption","volume":"27","author":"Heydari-Gorji","year":"2011","journal-title":"Langmuir"},{"issue":"1","key":"2026083119123100000_cit70","doi-asserted-by":"publisher","first-page":"235","DOI":"10.1016\/j.matchemphys.2012.09.014","article-title":"Polyethyleneimine-Loaded\nBimodal Porous Silica as Low-Cost and High-Capacity Sorbent for CO2 Capture","volume":"137","author":"Witoon","year":"2012","journal-title":"Mater. Chem. Phys."},{"issue":"20","key":"2026083119123100000_cit71","doi-asserted-by":"publisher","first-page":"8384","DOI":"10.1021\/acs.jpcc.4c00238","article-title":"How Does MOF-303 Achieve High Water\nUptake and Facile Release Capacity?","volume":"128","author":"Alkhatib","year":"2024","journal-title":"J. Phys.\nChem. C"},{"issue":"1","key":"2026083119123100000_cit72","doi-asserted-by":"publisher","first-page":"68","DOI":"10.1021\/jacs.3c10834","article-title":"CO2 Desorbs\nWater from\nK-MER Zeolite under Equilibrium Control","volume":"146","author":"Lee","year":"2024","journal-title":"J.\nAm. Chem. Soc."}],"container-title":["ACS Omega"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.acs.org\/doi\/pdf\/10.1021\/acsomega.6c04679","content-type":"application\/pdf","content-version":"vor","intended-application":"unspecified"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/11\/33\/49872\/66516263\/acsomega.6c04679.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/11\/33\/49872\/66516263\/acsomega.6c04679.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,31]],"date-time":"2026-08-31T23:12:39Z","timestamp":1788217959000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.acs.org\/acsodf\/article\/11\/33\/49872\/5253696\/Insights-into-CO2-Adsorption-Motifs-in"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,8,12]]},"references-count":72,"journal-issue":{"issue":"33","published-online":{"date-parts":[[2026,8,12]]},"published-print":{"date-parts":[[2026,8,25]]}},"URL":"https:\/\/doi.org\/10.1021\/acsomega.6c04679","relation":{},"ISSN":["2470-1343"],"issn-type":[{"value":"2470-1343","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,8,12]]}}}