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New photochromic inorganic/organic hybrid siloxane gels with chemically bonded spirobenzopyran moiety
Abstract
Transparent photochromic inorganic/organic hybrid gels involving the Chemically bonded spirobenzopyran moiety have been prepared by the sol–gel reactions using tetraethoxysilane, the silanol-terminated oligomeric poly(dimethylsiloxane), and spirobenzopyrans with the alcoxysilyl groups.
