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Synthesis and nonlinear optical properties of PMMA copolymers having novel benzoxazole chromophores attached with various electron-withdrawing groups

Title
Synthesis and nonlinear optical properties of PMMA copolymers having novel benzoxazole chromophores attached with various electron-withdrawing groups
Authors
Park K.H.Yeon K.M.Lee M.Y.Lee S.-D.Shin D.-H.Lee C.J.Kim N.
Ewha Authors
이민영
SCOPUS Author ID
이민영scopus
Issue Date
1998
Journal Title
Polymer
ISSN
0032-3861JCR Link
Citation
vol. 39, no. 26, pp. 7061 - 7066
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
For improvements of thermal stability and nonlinear optical (NLO) activity of chromophores, we newly synthesized a series of NLO chromophores incorporating aromatic benzoxazole unit as a π-conjugated bridge with various electron-withdrawing groups, such as nitrophenyl, nitrothiophene, nitrofuran, dicyanovinylphenyl, and nitrophenylethenyl group. Polymethylmethacrylate copolymers (PMBz) containing these benzoxazole chromophores were synthesized and their properties were investigated by thermogravimetry and ultraviolet-visible spectroscopy. The PMBz copolymers exhibited better thermal and ultraviolet stabilities than the corresponding copolymer with general stilbene chromophores (PMSt). Moreover, temporal stability of nonlinear optical coefficient (d 33) of PMBz copolymer increased in comparison with that of PMSt. The copolymer with benzoxazole-nitrothiophene chromophores had the largest d 33 value of 153 pm/V (at 1.064 mm) and nonresonant d 33 calculated by the two-level model was 21.3 pm/V.
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자연과학대학 > 화학·나노과학전공 > Journal papers
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