Abstract
Four fluorinated siloxane polymers labeled with fluorescent dyes were prepared by hydrosilylation of a mixture of allyl ethers with poly(methyl hydrogen siloxane). These comprised n-octyl allyl ether, 1H,1H,2H,-2H-perfluorooctyle allyl ether, and either 9-phenanthrylmethyl allyl ether or 9-anthrylmethyl ether. In addition a non-fluorinated polymer was prepared with the octyl allyl ether plus the phenanthryl ether. These yielded five polymers, mutually immiscible liquids labeled with chromophores appropriate for energy transfer studies. These experiments were carried out in 1,1,2-trichloro-1,2,2-trifluoroethane solution. Fluorescence decay profiles for the phenanthrene were all exponential, with lifetimes of 25 nsec for the allyl ether and 30 nsec for the polymer bound chromophore. Quenching was diffusion controlled, as expected; and the polymer-polymer reaction had a rate 5-fold slower than that between the phenanthryl and anthryl allyl ethers, independent of the fluorocarbon content of the polymer.
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