{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,12]],"date-time":"2026-02-12T11:48:23Z","timestamp":1770896903606,"version":"3.50.1"},"reference-count":27,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2021,9,27]],"date-time":"2021-09-27T00:00:00Z","timestamp":1632700800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100003725","name":"National Research Foundation of Korea","doi-asserted-by":"publisher","award":["NRF-2020R1A2C1015117"],"award-info":[{"award-number":["NRF-2020R1A2C1015117"]}],"id":[{"id":"10.13039\/501100003725","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>We developed a new category of porous silica and organosilicas nanostructures in a facile method based on weakly acidic aqueous-ethanol media by utilizing two different pentablock copolymer templates of type PLGA-PEO-PPO-PEO-PLGA. Pluronic block templates were used mainly to prepare these pentablock copolymers with different molecular weights and volume ratios. Silica precursor tetraethyl orthosilicate and organosilicas precursor 1,4-bis(triethoxysilyl)benzene have been used as main source for synthesizing the silica and organosilicas samples. Weak Lewis acids iron(III) chloride hexahydrate, aluminum(III) chloride hexahydrate, and boric acid were utilized as catalyst instead of any strong inorganic acids and the molar ratio of catalyst\/precursor has been optimized to 1\u20132 for preparation of ordered mesostructures. Reaction temperatures have been optimized to 25 \u00b0C for pure silica and both 25 \u00b0C as well as 40 \u00b0C for organosilicas to get the best result for mesostructures. A detailed analysis by using various analytical techniques like synchrotron small angle X-ray scattering, nitrogen sorption, transmission electron microscopy, scanning electron microscope, solid-state 29Si CP-MAS nuclear magnetic resonance (NMR), and so on has revealed well developed mesostructures with surface area of 388\u2013836 m2\/g for silica and 210\u2013691 m2\/g for organosilica samples, respectively. Furthermore, bimodal typepores have been observed from pore size distribution plot of the samples. Thermal stability of the materials was up to 400 \u00b0C as analyzed by thermogravimetric analysis.<\/jats:p>","DOI":"10.3390\/nano11102522","type":"journal-article","created":{"date-parts":[[2021,9,27]],"date-time":"2021-09-27T21:40:30Z","timestamp":1632778830000},"page":"2522","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Newly Designed Mesoporous Silica and Organosilica Nanostructures Based on Pentablock Copolymer Templates in Weakly Acidic Media"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7541-2964","authenticated-orcid":false,"given":"Nabanita","family":"Pal","sequence":"first","affiliation":[{"name":"Department of Physics and Chemistry, Mahatma Gandhi Institute of Technology, Gandipet, Hyderabad 500075, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Young","family":"Sunwoo","sequence":"additional","affiliation":[{"name":"Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jae-Seo","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Taeyeon","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4169-0189","authenticated-orcid":false,"given":"Eun-Bum","family":"Cho","sequence":"additional","affiliation":[{"name":"Department of Fine Chemistry, Seoul National University of Science and Technology, Seoul 01811, Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,9,27]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"897","DOI":"10.1039\/B610570J","article-title":"Designed synthesis of mesoporous solids via nonionic-surfactant-templating approach","volume":"9","author":"Wan","year":"2007","journal-title":"Chem. 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