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articleNo Access
"PROTEOSILICA" A NOVEL NANOCOMPOSITE WITH PEPTIDE ASSEMBLIES IN SILICA NANOSPACE: PHOTOISOMERIZATION OF SPIROPYRAN DOPED IN CHIRAL ENVIRONMENT
- KATSUHIKO ARIGA,
- TAKUJI AIMIYA,
- QINGMIN ZHANG,
- AKIHIRO OKABE,
- MAKIKO NIKI, and
- TAKUZO AIDA
International Journal of Nanoscience01 Oct 2002
Preview Abstract
Mesoporous silica composites filling densely peptide assemblies (Proteosilica) were newly synthesized as transparent films. Spiropyran guest was co-doped in the films and photo-isomerization between spiropyran form and merocyanine form was repeated by alternate irradiation of visible and UV lights. Circular dichroism (CD) active spectra were observed only for the spiropyran form in the Proteosilica with hexagonal geometry. However, the CD active behavior was absent for the spiropyran in lamellar Proteosilica. Difference in peptide assembling structures would affect chiral sensitivity of the doped spiropyran guest.

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