A second-order nonlinear optical material prepared through in situ hydrothermal ligand synthesis.
A second-order nonlinear optical material prepared through in situ hydrothermal ligand synthesis.
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DOI：
10.1021/ic0500098
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发表时间：
2005-04
影响因子：
4.6
通讯作者：
Qiong Ye;Yonghua Li;Yu-mei Song;Xue-Feng Huang;R. Xiong;Z. Xue
中科院分区：
文献类型：
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作者：
Qiong Ye;Yonghua Li;Yu-mei Song;Xue-Feng Huang;R. Xiong;Z. Xue
在 NaN(3) 和水存在下，ZnCl(2) 与苯甲腈、2-氨基-5-氰基吡啶和反式-2,3-二氢-2-(4''-氰基苯基)-苯并[e]吲哚进行原位水热反应，得到两个 3D 菱形网络，(CN(4)-C(6)H(5))(2)Zn (1) 和 (NH(2)-C(5)H(3)N-CN(4))(2)Zn (2)，以及一个 2D 方形网格网络 [(CN(4)-C(6)H(4)-C(12)H(7)N-C(5)H(4)N)(2)Zn].1.5H(2)O (3)，其中这些配体逐渐涉及非中心-A-D 分别是（受体-供体）系统、一中心-A-D系统和两中心-A-D系统。所有三种化合物均在非中心对称空间群（1 和 2 为 I2d，3 为 Fdd2）中结晶，并表现出强烈的二次谐波产生 (SHG) 响应。在三种新配合物中，3表现出最大的倍频效应，分别是尿素和KDP(KH(2)PO(4))的约50和500倍。 3中的二中心A-D系统（多中心推挽电子效应）可能是其具有最大SHG效应的原因。有趣的是，这三种化合物在不同波长下表现出强烈的荧光发射，1和2在390和415 nm处发射蓝色荧光，3在495和532 nm处发射黄绿色荧光。
The in situ hydrothermal reactions of ZnCl(2) with benzonitrile, 2-amino-5-cyanopyridine, and trans-2,3-dihydro-2-(4' '-cyanophenyl)-benzo[e]indole in the presence of NaN(3) and water afford two 3D-diamond-like networks, (CN(4)-C(6)H(5))(2)Zn (1) and (NH(2)-C(5)H(3)N-CN(4))(2)Zn (2), and one 2D square grid network, [(CN(4)-C(6)H(4)-C(12)H(7)N-C(5)H(4)N)(2)Zn].1.5H(2)O (3), in which these ligands gradually involve a noncenter-A-D (acceptor-donor) system, a one-center-A-D system, and a two-center-A-D system, respectively. All three compounds crystallize in noncentrosymmetric space groups (I2d for 1 and 2 and Fdd2 for 3) and display strong second harmonic generation (SHG) responses. Among the three new complexes, 3 shows the largest SHG effect, which is about 50 and 500 times that of urea and KDP (KH(2)PO(4)), respectively. The two-center-A-D system (multicenter push-pull electronic effect) in 3 may be responsible for it having the largest SHG effect. Interestingly, the three compounds exhibit strong fluorescent emissions at different wavelengths, 1 and 2 with blue fluorescent emissions at 390 and 415 nm and 3 with yellow-green fluorescent emissions at 495 and 532 nm.