Solid state photopolymerization of modified amphiphilic diynes in multilayers

Solid state topochemical photopolymerization of amphiphilic diynes modified at hydrophobic part of molecule was under the study. All compounds formed stable monomer monolayers on an aqueous subphase surface and were transferr ed as multilayers onto quartz substrates by the Langmuir-Blodgett technique . The changes of the multilayer absorption spectra as a function of UV irra diation time have been investigated. It is shown that the insertion of an e ster or sulfonyl group into the hydrophobic part of the diyne molecule incr eased their activity in topochemical photopolymerization reaction. The poly mer absorbancies decreased under excess UV irradiation due to the decomposi tion of polydiacetylenic chains in the multilayer structure.