Hybrid materials covalently incorporated with isophorone-based dyes through sol-gel process for nonlinear optical applications.
Hybrid materials covalently incorporated with isophorone-based dyes through sol-gel process for nonlinear optical applications.
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DOI：
10.1021/jp063802a
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发表时间：
2006-09
期刊：
影响因子：
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通讯作者：
Lujian Chen;G. Qian;Yuanjing Cui;Xue-Ming Jin;Zhiyu Wang;Min-quan Wang
中科院分区：
文献类型：
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作者：
Lujian Chen;G. Qian;Yuanjing Cui;Xue-Ming Jin;Zhiyu Wang;Min-quan Wang
合成并表征了两种具有相同受体的推拉型二阶非线性光学活性异佛尔酮烷氧基硅烷染料。一种硅烷（ICTES-HEMA）带有带有羟乙基甲基氨基供体的发色团，另一种硅烷（ICTES-HMPP）是带有羟甲基二苯基氨基供体的体积较大的类似物。以正硅酸乙酯（TEOS）和不同的非线性有机硅烷（NLO）为原料，按5：1的比例共聚，制备了透明、均匀的薄膜。对于HEMA和HMPP膜获得的d（33）值分别为46.3和20.6pm/V。归一化的紫外-可见光谱表明，二芳基基团的引入将有助于防止发色团的不利组织。二次谐波产生（SHG）测量的样品的重取向动态稳定性进行了研究，表明，体积较大的发色团纳入溶胶-凝胶材料不一定会导致随着时间的推移更高的稳定性。
Two new push-pull type second-order nonlinear optical (NLO) active isophorone-based alkoxysilane dyes with the same acceptor were synthesized and characterized. One silane (ICTES-HEMA) bears a chromophore with a hydroxyethyl methylamino donor and the other silane (ICTES-HMPP) is a bulkier analogue with a hydroxymethyl diphenylamino donor. Transparent, homogeneous films were prepared via the copolymerization of tetraalkoxysilane (TEOS) and different NLO silanes with the ratio of 5:1. The d(33) values obtained for the HEMA and HMPP films are 46.3 and 20.6 pm/V, respectively. Normalized UV-vis spectra reveal that the introduction of a diaryl group would help to prevent unfavorable organization of the chromophores. The reorientation dynamic stabilities of the samples were studied by second-harmonic generation (SHG) measurements, demonstrating that bulkier chromophores incorporated in sol-gel materials would not necessarily lead to higher stabilities over time.