Irradiance and temperature dependence of photoinduced orientation in two azobenzene-based polymers

Article Abstract:

Photoinduced orientation in two azobenzene-based polymers has been studied with photoinduced anisotropy of interest. Poly(4-(2-(methacryloxy)-ethyl-ethyl)azobenzene) and poly(4-((2-(methacryloxy)-ethyl)-ethyl)amino-4-nitroazobenzene) were used. A simple physical model of the process has been proposed. The model considers only three possible states of azo chromophores and the anisotropy equilibrium level of anisotropy would depend on pump irradiance and temperature.

Observations, Temperature

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Synthesis and properties of a sterically encumbered poly(thienylene vinylene): poly (E-1,2-(4,4'-dihexyl-2,2'-dithienyl)ethylene)

Article Abstract:

Synthesis and properties of a sterically encumbered poly(thienylene vinylene), poly(E-1,2-(4,4'-dihexyl-2,2'-dithienyl)ethylene) (PDHDTE) have been studied. The alkylthiophene dyads are arranged head-to-head, which affects the UV-vis, electroluminescence and photoluminescence peaks directly. Mechanisms for photooxidation have been suggested based on photoproducts monitored using FTIR during photolysis of PDHDTE.

Usage, Electroluminescence, Optoelectronic devices, Organometallic compounds, Electrooptics, Electro-optics, Photolithography

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