三苯胺-芴共聚物桥联的[60]富勒烯功能材料的合成及非线性光学性能  

Synthesis and Nonlinear Optical Performance of Triphenylamine-Fluorene Copolymer Covalently Bridged[60]Fullerene Triad

作　　者：黄舒桐 张斌[1] 陈彧[1] HUANG Shutong;ZHANG Bin;CHEN Yu(Key Laboratory for Advanced Materials,School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学化学与分子工程学院,教育部结构可控先进功能材料及其制备重点实验室,上海200237

出　　处：《功能高分子学报》2020年第5期441-451,共11页Journal of Functional Polymers

基　　金：国家自然科学基金(61378072)。

摘　　要：利用1,3-偶极加成反应制备了三苯胺-芴共聚物桥联的[60]富勒烯非线性光学功能材料(C60-PTF-C60),将该材料掺杂于非光学活性的透明聚甲基丙烯酸甲酯(PMMA)中制成具有优良光学性能的薄膜(C60-PTF-C60/PMMA)。利用开孔Z扫描技术研究了C60-PTF-C60薄膜在532 nm激光辐照下的非线性光学和光限幅性能。结果表明:与C60/PMMA薄膜相比,在400μJ激光辐照下,C60-PTF-C60/PMMA薄膜展现出更高的非线性吸收系数(βeff:437.75 cm/GW)和三阶非线性磁化率虚部系数(Imχ(3):1.87×10−10 esu),其光限幅阈值为0.34 GW/cm2,优于C60/PMMA薄膜的光限幅阈值0.53 GW/cm2。As one of the quasi-zero-dimensional materials,[60]fullerene(C60)and its organic/polymeric derivatives exhibit great application potential in many high-technology fields due to their outstanding optical,electronic,optoelectronic and magnetic properties.A new triphenylamine-fluorene copolymer-[60]fullerene covalently bridged triad(C60-PTF-C60)was synthesized by the 1,3-dipole addition reaction of C60,sarcosine and PTF terminated with two aldehyde groups(CHO-PTFCHO).This material,which was highly soluble in some common organic solvents,was embedded into an optically nonactive transparent poly(methylmethlacrylate)(PMMA)matrix to produce the PMMA-based C60-PTF-C60 film for nonlinear optics.The nonlinear optical(NLO)and optical limiting(OL)properties of C60-PTF-C60 were investigated through an open-aperture Z-scan setup at 532 nm.The C60-PTF-C60/PMMA film exhibited more excellent NLO and OL responses when compared to the C60/PMMA film under the same experimental conditions due to photo-induced electron transfer between C60 and PTF in the copolymer structure.The achieved nonlinear coefficient(βeff),imaginary third-order susceptibility(Imχ(3)),and OL threshold were 437.75 cm/GW,1.87×10−10 esu,and 0.34 GW/cm2,respectively.For comparison purpose,the correspondingβeff,Imχ(3),and limiting threshold of the C60/PMMA film were 188.87 cm/GW,0.81×10−10 esu,and 0.53 GW/cm2,respectively.

关 键 词：富勒烯 三苯胺-芴共聚物 非线性光学 光限幅 

分 类 号：O437[机械工程—光学工程]