Synthesis of Chiral Periodic Mesoporous Silicas (ChiMO) of MCM-41 Type with Binaphthyl and Cyclohexadiyl Groups Incorporated in the Framework and Direct Measurement of Their Optical Activity

Autor:	Hermenegildo García, Debasish Das, Mercedes Alvaro, Miriam Benitez, Belén Ferrer
Rok vydání:	2004
Předmět:	chemistry.chemical_classification Materials science General Chemical Engineering Inorganic chemistry General Chemistry Polymer Powder xrd Fluorescence Silicate Crystallography chemistry.chemical_compound chemistry MCM-41 Covalent bond Materials Chemistry Mesoporous material Porosity
Zdroj:	Chemistry of Materials. 16:2222-2228
ISSN:	1520-5002 0897-4756
DOI:	10.1021/cm0311630
Popis:	A series of periodic mesoporous silicas of MCM-41 type containing varying amounts (5−50%) of chiral binaphthyl and cyclohexadiyl moieties occupying framework positions have been synthesized, and their characteristic MCM-41 features were observed by powder XRD and porosity measurements. The covalent bonding of the organics to the silicate framework was confirmed by 1H and 29Si MAS NMR experiments. Direct measurement of the optical activity demonstrates that the solids are able to rotate the angle of plane-polarized light. Also, a certain degree of chiral discrimination has been observed for the asymmetric enhancement of the binaphthyl fluorescence by adding enantiomerically pure 1,2-cyclohexadiamine.
Databáze:	OpenAIRE
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