Enhancement of nonlinear optical activity in new six-branched dendritic dipolar chromophore

A new six-branched chromophore GGQ1 is designed and synthesized via the incorporation of an FTC-type chromophore 1 with phenyl glycerol ester. The six-branched chromophore GGQ1 shows a large molecular weight of 3834 Daltons and can directly form thin films with quite high active chromophore loading...

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Bibliographic Details
Published in:Journal of materials chemistry 2011-01, Vol.21 (9), p.3197-3203
Main Authors: Gao, Junkuo, Cui, Yuanjing, Yu, Jiancan, Lin, Wenxin, Wang, Zhiyu, Qian, Guodong
Format: Article
Language:English
Subjects:
Chromophores
Density
Doped films
Doping
Electrostatics
Esters
Nonlinearity
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Summary:A new six-branched chromophore GGQ1 is designed and synthesized via the incorporation of an FTC-type chromophore 1 with phenyl glycerol ester. The six-branched chromophore GGQ1 shows a large molecular weight of 3834 Daltons and can directly form thin films with quite high active chromophore loading density. For comparison, guest-host doped polymer films are fabricated by doping chromophore 1 and BF1 into poly(4-vinylphenol). All of these doped films show a saturated trend in second harmonic generation coefficient (d33) and a maximum d33 value between 50-70 pm V-1 around the doping concentration of 25 wt%, due to the strong interchromophore electrostatic interactions. In contrast, GGQ1 films display a d33 value of 192 pm V-1. The results indicate that the six-branched chromophore could efficiently reduce the interchromophore electrostatic interactions and enhance the macroscopic optical nonlinearity, showing promise for applications in nonlinear optical (NLO) materials.
ISSN:0959-9428
1364-5501
DOI:10.1039/c0jm03367g