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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 2
BKCSDE 31(2)
February 20, 2010

Title	Synthesis and Nonlinear Optical Properties of Novel T-type Polyester Containing Thiophene with Enhanced Thermal Stability
Author	Hyo Jin No, You Jin Cho, Ju Yeon Lee*
Keywords	Nonlinear optics, Polyester, Differential scanning calorimetry, AFM, Second harmonic generation
Abstract	A novel T-type polyester 7 containing 1-(2,5-dioxyphenyl)-2-{5-(1,2,2-tricyanovinyl)-2-thienyl}ethenes as nonlinear optical (NLO) chromophores, which are part of the polymer backbone, was prepared and characterized. Polyester 7 is soluble in common organic solvents such as dimethylsulfoxide and N,N-dimethylformamide. It showed a thermal stability up to 300 oC in thermogravimetric analysis thermogram and the glass-transition temperature (T_g) obtained from differential scanning calorimetry thermogram was around 113 oC. The second harmonic generation (SHG) coefficient (d₃₃) of poled polymer films at 1,560 nm fundamental wavelength was around 1.85 pm/V. The dipole alignment exhibits a greater thermal stability even at 10 oC higher than T_g, and there is no SHG decay below 125 oC due to the partial mainchain character of the polymer structure, which is acceptable for nonlinear optical device applications.
Page	429 - 434
Full Text	PDF

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