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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 30, Number 5
BKCSDE 30(5)
May 20, 2009 

 
Title
Preparation and Properties of A Novel Y-type Nonlinear Optical Polyester with Dioxybenzylidenecyanoacetate Groups
Author
Ga Young Lee, Dong Seon Won, Han Na Jang, Hyo Jin No, Ju Yeon Lee*
Keywords
Nonlinear optics, Polyester, AFM, Second harmonic generation, Dipole alignment
Abstract
Methyl 2,4-di-(2'-hydroxyethoxy)benzylidenecyanoacetate (3) was prepared and polymerized with terephthaloyl chloride to yield a novel Y-type polyester 4 containing 2,4-dioxybenzylidenecyanoacetate groups as NLOchromophores, which constituted parts of the polymer backbone. The resulting polymer 4 is soluble in common organic solvents such as acetone and N,N-dimethylformamide. Polymer 4 showed thermal stability up to 280 oC in thermogravimetric analysis with glass-transition temperature obtained from differential scanning calorimetry near 108 oC. The second harmonic generation (SHG) coefficient (d33) of poled polymer films at the 1064 nm fundamental wavelength was around 3.54 × 10-9 esu. The dipole alignment exhibited a thermal stability up to near Tg and no significant SHG decay was observed below 100 oC due to the partial main-chain character of polymer structure, which is acceptable for NLO device applications.
Page
1080 - 1084
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