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Luminescent Monomer and Poly(methacrylate) Containing 1,3,4-Oxadiazole and Stilbene Units: Synthesis and Optical Properties

✍ Scribed by John A. Mikroyannidis

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
196 KB
Volume
205
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Summary: A monomer M as well as a poly(methacrylate) P carrying the same chromophore, that consists of 1,3,4‐oxadiazole and stilbene units, were efficiently synthesized. They dissolved in common organic solvents such as THF, chloroform, dichloromethane, 1,1,2,2‐tetrachloroethane and chlorobenzene. P showed a T~g~ value of 145 °C. Both M and P were stable up to approximately 300 °C and afforded anaerobic char yield of about 40% at 800 °C. Their optical properties were comparable. They emitted intense violet‐blue light in THF solution with a PL maximum at 413 nm and a PL quantum yield of 0.29 for M and 0.73 for P. Thin films of them displayed optical band gap of 3.03 eV and blue‐light emission with a PL maximum around 440 nm. The PL curves of both samples were progressively red‐shifted with increasing the solvent polarity. The influence of the annealing on the PL emission spectrum of M and P thin films was investigated.
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