New Photochromic Zinc(II) Complexes with 1,2,4-Triazole-Containing Schiff Bases

IF 1.1 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Russian Journal of Coordination Chemistry Pub Date : 2026-04-01 DOI:10.1134/S1070328425601529

A. A. Bovkunova, A. A. Anisimov, V. E. Gontcharenko, E. S. Bazhina, I. V. Taydakov, I. L. Eremenko, I. V. Ananyev

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Abstract

The reactions of zinc(II) bromide with Schiff bases, 4-(2-hydroxyphenyl)methyleneamino-1,2,4-triazole (HL¹) and 4-(2-hydroxy-3-methoxyphenyl)methyleneamino-1,2,4-triazole (HL²), yielded the complexes [Zn(HL¹)₂Br₂] (I) and [Zn(HL²)₂Br₂] (II). It was shown that I and II are also formed upon the addition of hydrobromic acid to a suspension of zinc(II) coordination compounds containing anionic [L¹]^– and [L²]^– ligands in MeOH. The crystal structures of compounds I and II were determined by single-crystal X-ray diffraction (CIF files CCDC no. 2502710 (I), no. 2502711 (II)). It was found that upon complexation with Zn²⁺ ions, conformational changes occur in the HL¹ and HL² molecules. This facilitates intramolecular proton transfer, causing compounds I and II to exhibit a photochromic effect, which is confirmed by diffuse reflectance spectroscopy data.

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新型含1,2,4-三唑希夫碱光致变色锌（II）配合物

溴化锌（II）与希夫碱4-（2-羟基苯基）亚胺-1,2,4-三唑（HL1）和4-（2-羟基-3-甲氧基苯基）亚胺-1,2,4-三唑（HL2）反应，得到配合物[Zn(HL1)2Br2] (I)和[Zn(HL2)2Br2] （II）。结果表明，在含有阴离子[L1] -和[L2] -配体的锌（II）配位化合物悬浮液中加入氢溴酸也能形成I和II。化合物I和II的晶体结构通过单晶x射线衍射(CIF文件CCDC no.；2502710 (I), no。2502711(2))。发现与Zn2+离子络合后，HL1和HL2分子的构象发生了变化。这促进了分子内质子转移，导致化合物I和II表现出光致变色效应，漫反射光谱数据证实了这一点。

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来源期刊

Russian Journal of Coordination Chemistry 化学-无机化学与核化学

CiteScore

2.40

自引率

15.80%

发文量

审稿时长

7.2 months

期刊介绍： Russian Journal of Coordination Chemistry is a journal that publishes reviews, original papers, and short communications on all aspects of theoretical and experimental coordination chemistry. Modern coordination chemistry is an interdisciplinary science that makes a bridge between inorganic, organic, physical, analytical, and biological chemistry.