Nanooptics and photonics

Polymers with styrylquinoline chromophore in side chain for nonlinear optics
Kharchenko O.H., Smokal V.O., Krupka O.M., Kolendo O.Yu.  
Department of Macromolecular Chemistry, Taras Shevchenko National University of Kyiv, 60 Volodymyrska Street, Kyiv, Ukraine , 01033 
E-mail: oksana_kharchenko@ukr.net 

Nonlinear optical polymers have received significant attention due to their promising application in photonics, electro-optics etc. It was shown in many works, among of required properties of polymers are transparency, filmability, thermal and photostability, easy synthesis with starting materials [1]. These features can be achieved by introducing chromophore in side chain of polymer matrix. Such type of polymers can composed of different organic chromophores, e.g., azobenzenes, chalcones, and styryl dyes. The latest decades, styrylquinoline dyes have been attracted special attention due to photochemical activity of ethylenic bond and endocyclic nitrogen atom. It is known that synthesized styrylquinoline derivatives exist in trans-configuration. The trans-isomer is more thermodynamical stable and photoinduced swiching to the cis-isomer is characterized by high quantum yields [3]. Styrylquinolines can be reversibly switched upon light excitation and used as models of molecular devices, switches and logic gates.
Besides, photoisomerization mechanism of some styrylquinoline derivatives have not been investigated yet. In this work we present methacrylic polymers based on 8-methacryloxy-2-styrylquinoline as perspective compounds for application in nonlinear optics. Polymerization was carried out in dimethylformamide with 2,2’-azobisisobutyronitrile as initiator, at 80 0C and argon atmosphere. Polymers were characterized by 1H NMR, UV-VIS, DSC, GPC. 
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1.	Scarpaci A., Blart E. et al. Synthesis and nonlinear optical properties of a peripherally functionalized hyperbranched polymer by DR1 chromophores // Applied Materials & Interfaces.-2009.-1, N.8.-P. 1799-1806.
2.	Budyka M.F. Photonics of styrylquinoline dyads // Org. Photonics. Photovolt.-2014.-3.-P. 101–131.