NLO chromophores containing dihydrobenzothiazolylidene and dihydroquinolinylidene donors with an azo linker: Synthesis and optical properties
摘要:
We report the synthesis of a series of nonlinear optical chromophores containing either - a dihydrobenzothiazolylidene or dihydroquinolinylidene donor with an azo linker. The results demonstrate the versatility of coupling a diazonium salt to a donor-methylidene nucleus in order to access novel materials with good thermal stabilities and high nonlinear optical responses. From hyper-Raleigh scattering studies it was found that the use of the well-known TCF acceptor yields the best performing chromophores, one of which has a dynamic first hyperpolarizability of 1900 x 10(-30) esu at 800 nm. The results from this study suggest the use of pro-aromatic donors such as dihydrobenzothiazolylidene or dihydroquinolinylidene results in compounds with higher nonlinear optical responses than those containing donors based on either indoline or aniline. (C) 2013 Elsevier Ltd. All rights reserved.
NLO chromophores containing dihydrobenzothiazolylidene and dihydroquinolinylidene donors with an azo linker: Synthesis and optical properties
摘要:
We report the synthesis of a series of nonlinear optical chromophores containing either - a dihydrobenzothiazolylidene or dihydroquinolinylidene donor with an azo linker. The results demonstrate the versatility of coupling a diazonium salt to a donor-methylidene nucleus in order to access novel materials with good thermal stabilities and high nonlinear optical responses. From hyper-Raleigh scattering studies it was found that the use of the well-known TCF acceptor yields the best performing chromophores, one of which has a dynamic first hyperpolarizability of 1900 x 10(-30) esu at 800 nm. The results from this study suggest the use of pro-aromatic donors such as dihydrobenzothiazolylidene or dihydroquinolinylidene results in compounds with higher nonlinear optical responses than those containing donors based on either indoline or aniline. (C) 2013 Elsevier Ltd. All rights reserved.
The third-order nonlinear optical properties of charge flowable trimethine cyanine with quinolone groups
作者:Jia-Tao Miao、Xing-Zhi Wu、Ru Sun、Ying-Lin Song、Jian-Feng Ge
DOI:10.1016/j.dyepig.2014.01.014
日期:2014.6
Organic molecules with charge flow abilities gain much attention in third-order nonlinear optical materials. To evaluate the hypothesis of terminal donor and/or acceptor groups participating organic resonance structures for third-order nonlinear optical materials, conjugated double bonds structures with terminal amino groups are selected in this paper. The trimethine cyanine dye with quinolone skeleton (3a) was synthesized, it shows strong reverse saturable absorption and nonlinear refraction in dimethyl formamide solution at 532 nm. Then, its derivative compound (3b) with long alkyl chains was synthesized in order to improve the film forming performance, the spinning coating thin film exhibits strong reverse saturable absorption with the third-order nonlinear susceptibilities x(I)((3)) = 3.42 x 10(-8) esu and chi((3)) = 3.23 x 10(-9) esu under nanosecond and picosecond laser beams respectively. The results validate that the organic compounds with terminal donor and/or acceptor groups participating resonance structures have potential value for the design of the third-order nonlinear optical materials. (c) 2014 Elsevier Ltd. All rights reserved.