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Three systems, containing 1, 2, and 4 solutes, were studied at 298\u00a0K. The results demonstrate that EChlideA molecules predominantly adsorb onto the silica surfaces, driven by specific interactions between chlorin ring\u2019s methyl group and the hydroxyl groups of the silica. This adsorption leads to stable binding, particularly in less crowded environments, as indicated by the potential of mean force analysis. Higher molecular concentrations, such as those with four EChlideA molecules, introduce variation in binding strength due to molecular aggregation and complex interactions. The orientation analysis reveals that the chlorin ring tends to align parallel to the surface, requiring rotational adjustments during surface diffusion. In addition, solvent coordination around the Mg ion remains consistent under bulk conditions, although with some variation in higher concentrations. This study also highlights a decrease in linear diffusion and an increase in rotational relaxation times for EChlideA molecules within the confined nanoslit, reflecting the influence of molecular concentration and arrangement on their dynamics. These findings provide valuable insights into the role of surface interactions, molecular orientation, and solvent coordination in confined environments, offering implications for the design of nanoscale systems.<\/jats:p>","DOI":"10.1063\/5.0233264","type":"journal-article","created":{"date-parts":[[2024,10,8]],"date-time":"2024-10-08T16:24:05Z","timestamp":1728404645000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["A molecular dynamics simulation study of EthylChlorophyllide A molecules confined in a SiO2 nanoslit"],"prefix":"10.1063","volume":"161","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8495-3815","authenticated-orcid":false,"given":"Danilo","family":"Roccatano","sequence":"first","affiliation":[{"name":"School of Engineering and Physical Sciences, University of Lincoln 1 , Brayford Pool, Lincoln LN6 7TS,","place":["United Kingdom"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0002-4163","authenticated-orcid":false,"given":"Khadga Jung","family":"Karki","sequence":"additional","affiliation":[{"name":"Department of Physics, Guangdong Technion-Israel Institute of Technology 2 , Shantou 515063, Guangdong, and , Shantou 515603, Guangdong,","place":["China China"]},{"name":"Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion, Guangdong Technion-Israel Institute of Technology 2 , Shantou 515063, Guangdong, and , Shantou 515603, Guangdong,","place":["China China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"317","published-online":{"date-parts":[[2024,10,8]]},"reference":[{"volume-title":"Photosynthesis: Solar Energy for Life","year":"2018","key":"2024100809593826200_c1"},{"key":"2024100809593826200_c2","doi-asserted-by":"publisher","first-page":"763","DOI":"10.1038\/nchem.1145","article-title":"Lessons from nature about solar light harvesting","volume":"3","year":"2011","journal-title":"Nat. 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