Study of third-order nonlinear susceptibility of polySchiff base containing triphenylamine  

作　　者：NIU HaiJun WANG Wen HUANG YuDong ZHANG YunDong ZHANG YunJun BAI XuDuo LIU Yuan 

机构地区：[1]Key Laboratory of Color and Macromolecular Chemistry,Heilongjiang University,Harbin 150080,China [2]Institute of Advanced Ceramic,Harbin Institute of Technology,Harbin 150001,China [3]Department of Applied Chemistry,Harbin Institute of Technology,Harbin 150001,China [4]Institute of Opto-electronics,Harbin Institute Technology,Harbin 150001,China

出　　处：《Science China Chemistry》2007年第2期230-237,共8页中国科学（化学英文版）

基　　金：Supported by the National Science Foundation of China (Grant No. 50502013);Heilongjiang National Science Key Foundation (Grant No. EJG0506-01);Heilongji-ang Educational Bureau Foundation (Grant 11511271);Heilongjiang Youth Founda-tion (Grant Nos. QC05C15, QC05C06);Harbin Youth Foundation (Grant 2005AFQXJ062);Heilongjiang University Youth Foundation (Grant QL200516)

摘　　要：PolySchiff base containing triphenylamine has been synthesized by polycondensation and characterized by FT-IR, NMR, UV-visible spectrometer. Measurements of the third-order optical nonlinear susceptibility χ (3) by Z-scan technique have shown that the large nonlinearity is dominated by the two-photon absorption in PSB. The sign and size of real part Reχ (3), nonlinear refractive index n 2 have been measured with the condition of 532 nm, 8 ns-duration pulses to be ?1.23×10?10 esu, ?3.06×10?12 esu; nonlinear absorption index β and size of image part lmχ (3) to be 3.63×10?10 m/W, 1.15×10?11 esu, respectively, so the third-order nonlinear susceptibility χ (3) is 1.19×10?11 esu. The value is larger than other polymers reported. PSB is self-focusing material and has potential application in nonlinear optic field.PolySchiff base containing triphenylamine has been synthesized by polycondensation and character-ized by FT-IR,NMR,UV-visible spectrometer. Measurements of the third-order optical nonlinear sus-ceptibility χ(3) by Z-scan technique have shown that the large nonlinearity is dominated by the two-photon absorption in PSB. The sign and size of real part Reχ(3) ,nonlinear refractive index n2 have been measured with the condition of 532 nm,8 ns-duration pulses to be -1.23×10-10 esu,-3.06×10-12 esu;nonlinear absorption index β and size of image part Imχ(3) to be 3.63×10-10 m/W,1.15×10-11 esu,respec-tively,so the third-order nonlinear susceptibility χ(3) is 1.19×10-11 esu. The value is larger than other polymers reported. PSB is self-focusing material and has potential application in nonlinear optic field.

关 键 词：polySchiff base triphenylamine THIRD-ORDER SUSCEPTIBILITY Z-SCAN 

分 类 号：O621.25[理学—有机化学]