| Bifunctional periodic mesoporous organosilicas with thiophene and isocyanurate bridging groups. | |
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MedLine Citation:
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PMID: 19722603 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Bifunctional periodic mesoporous organosilicas (BPMOs) with thiophene- and isocyanurate-bridging groups were prepared by one-pot co-condensation of 2,5-bis(triethoxysilyl)thiophene and tris[3-(trimethoxysilyl)propyl]isocyanurate precursors in the presence of a poly(ethylene oxide)-poly(DL-lactic acid-co-glycolic acid)-poly(ethylene oxide) (PEO-PLGA-PEO) triblock copolymer under acidic conditions. The resulting BPMOs exhibited 2D hexagonal ordering (p6mm), large mesopores of approximately 7.7 nm, and high BET surface area (approximately 600-700 m(2)/g). (13)C CP-MAS and (29)Si MAS NMR studies confirmed the presence of thiophene and isocyanurate bridging groups inside the framework of pore walls with the relative content reflecting the synthesis gel composition. Additional quantitative estimation was provided by N and S elemental analysis. Thermogravimetric analysis showed the thiophene-isocyanurate BPMOs are stable up to 250 degrees C in flowing air and up to 400 degrees C in flowing nitrogen. |
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Authors:
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Eun-Bum Cho; Dukjoon Kim; Mietek Jaroniec |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Langmuir : the ACS journal of surfaces and colloids Volume: 25 ISSN: 1520-5827 ISO Abbreviation: Langmuir Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-11-10 Completed Date: 2010-01-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9882736 Medline TA: Langmuir Country: United States |
Other Details:
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Languages: eng Pagination: 13258-63 Citation Subset: - |
Affiliation:
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Department of Chemical Engineering, Polymer Technology Institute, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Korea. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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