C_(60)-吡咯烷衍生物的合成及非线性光学性质的研究  

Synthesis and Nonlinear Optical Properties of Fulleropyrrolidine Derivatives

作　　者：霍延平[1] 曾和平[2] 江焕峰[1] 刘军辉[3] 毛艳丽[3] 

机构地区：[1]中国科学院广州化学研究所,广州510650 [2]华南理工大学化学科学学院功能分子研究所,广州510641 [3]河南大学物理与信息光电子学院,开封475001

出　　处：《有机化学》2006年第12期1657-1662,共6页Chinese Journal of Organic Chemistry

基　　金：国家自然科学基金(Nos.20231020;20471020)资助项目.

摘　　要：通过富勒烯C60与肌氨酸和有机醛化合物的1,3-偶极环加成反应,获得了九种含不同有机功能基团的C60吡咯烷衍生物1～9,用1HNMR,13CNMR,FTIR,UV-vis和FAB-MS进行了结构表征;利用皮秒激光光源,采用z扫描技术测定了分子的三阶非线性超极化率γ(3),结果显示:化合物3(γ(3)=4.14×10-33esu)具有最大的三阶非线性光学系数,说明增加噻吩共轭链的长度,使三阶非线性活性增加;对具有相同共轭链的C60-噻吩吡咯烷衍生物(2,5,1和4),吸电子取代基减小了三阶光学非线性活性,给电子基增大了三阶光学非线性活性;同时发现喹啉环2-位键联(7)比4-位(8)有更好的三阶光学非线性活性.A series of azomethine ylides were prepared through the reaction between the different substituted conjugated aldehydes and sarcosine. Further 1,3-dipolar cycloaddition of these azomethine ylides to C60 gave a series of new fulleropyrrolidine derivatives 1～9. The molecular structures were identified and characterized by ^1H NMR, ^13C NMR, FTIR, UV-vis and FAB-MS spcctra. The third-order nonlinear optical hyperpolarizabilities γ（3） were obtained under picosecond laser by z-scan technique. It was found that the γ（3） value of 3 （4.14× 10^-33 esu） is the largest which indicates that the γ（3） values become larger with the increasing length of nT. We also found that different substituents at the a position of the thiophene rings （2, 5, 1 and 4）, different position of N atom of quinoline （7 and 8） and different kinds of conjugate chain have different effects on the nonlinear optical properties of fulleropyrrolidine dyads.

关 键 词：C60-吡咯烷衍生物 Z扫描 三阶非线性光学系数 

分 类 号：O626.13[理学—有机化学]