Preparation and Properties of A Novel Y-type Nonlinear Optical Polyester with Dioxybenzylidenecyanoacetate Groups

Bulletin of the Korean chemical society

Dong Seon Won¹  Ju Yeon Lee¹  Han Na Jang¹  Hyo Jin No¹  Ga Young Lee¹ 

关键词: Nonlinear optics;    Polyester;    AFM;    Second harmonic generation;    Dipole alignment;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

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.

【 授权许可】

Unknown