Patent ID: 8119248

Claim:
An organic-inorganic hybrid free standing film comprising an organic polymer and a hydrolytic condensate of a metal alkoxide, the organic polymer comprising a repeating unit derived from a monomer represented by general formula (1): wherein, R 1 represents a hydrogen atom or an alkyl group, L 1 represents a divalent linkage group or direct linkage, and X 1 represents an acidic group containing phosphorus atom represented by the general formula (A): wherein, Ra represents a hydrogen atom, a substituent containing no polymerizable group, or Ac—O—Y—, n 1 and n 2 independently represent an integer of 0 or 1, * indicates binding position with the L 1 , Ac represents an acryloyl group or a methacryloyl group, Y represents an alkylene group, an alkyleneoxy group, an alkyleneoxycarbonyl group, an alkylenecarbonyl group, or a combination of such groups, or X 1 represents an acidic group containing sulfur atom represented by the general formula (B): wherein, n 3 and n 4 independently represent an integer of 0 or 1, and * indicates a binding position with the L 1 .