Synthesis technology of mono-, bi-, trinuclear carbinol derivatives of ferrocene [C₅H₅FeC₅H₄]_nC–OH (n=1, 2, 3) was developed and thin coverings of photocomposite materials with polymer matrixes were produced. Considering the dependence of photo quenching efficiency of photocomposite ferrocene–polymer depends on the amount of ferrocene, in the work the experimental results of the dependence in composition samples on a number of nuclei of ferrocene were presented, as well as the reasons of electroconductivity of photo quenching in samples based on mono- and multinuclear carbinols of polymer–ferrocene were determined and the mechanism of photo quenching effect was proposed