A new photosensitive charge transfer complex has been synthesized based on phosphomolybdic acid and α-phridylazo-β-naphthol and characterized by elemental analysis, IR spectrum, UV spectrum, The resalts of IR spectra showed that the coordinating atom of α-phridylazo-β-naphthol was oxygen of C-O bond. The organic ligands do not coordinate with heteropolyanions, but with protons in heteropoly acid by coordination bond. Photochromism studies show that the electron transfer takes place from the organic molecules to the heteropolyanions.
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