A Second-Order Nonlinear Optical Material Prepared through In Situ Hydrothermal Ligand Synthesis

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• 作者：Qiong Ye ; Yong-Hua Li ; Yu-Mei Song ; Xue-Feng Huang ; Ren-Gen Xiong ; and Ziling Xue
• 刊名：Inorganic Chemistry
• 出版年：2005
• 出版时间：May 16, 2005
• 年：2005
• 卷：44
• 期：10
• 页码：3618 - 3625
• 全文大小：637K
• 年卷期：v.44,no.10(May 16, 2005)
• ISSN：1520-510X

文摘

The in situ hydrothermal reactions of ZnCl₂ with benzonitrile, 2-amino-5-cyanopyridine, and trans-2,3-dihydro-2-(4' '-cyanophenyl)-benzo[e]indole in the presence of NaN₃ and water afford two 3D-diamond-like networks,(CN₄-C₆H₅)₂Zn (1) and (NH₂-C₅H₃N-CN₄)₂Zn (2), and one 2D square grid network, [(CN₄-C₆H₄-C₁₂H₇N-C₅H₄N)₂Zn]·1.5H₂O (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 noncentrosymmetricspace 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 ureaand KDP (KH₂PO₄), respectively. The two-center-A-D system (multicenter push-pull electronic effect) in 3 may beresponsible for it having the largest SHG effect. Interestingly, the three compounds exhibit strong fluorescent emissionsat different wavelengths, 1 and 2 with blue fluorescent emissions at 390 and 415 nm and 3 with yellow-greenfluorescent emissions at 495 and 532 nm.