Water-soluble copper(i) complexes bearing 2,2′-bicinchoninic acid dipotassium salt with red-light absorption and repeatable colour change upon freezing operation
Water-soluble copper(i) complexes bearing 2,2′-bicinchoninic acid dipotassium salt with red-light absorption and repeatable colour change upon freezing operation
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含有 2,2′-二辛可宁酸二钾盐的水溶性铜 (i) 络合物，具有红光吸收和冷冻操作时可重复的颜色变化
DOI：
10.1039/c8nj05147j
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发表时间：
2019
影响因子：
3.3
通讯作者：
Tsubomura Taro
中科院分区：
文献类型：
--
作者：
Saito Yuma;Nishikawa Michihiro;Tsubomura Taro
我们新合成了一个含2，2‘-联苯二酸二钾(biq(Cook)2)配体的铜(I)配合物，并用元素分析、核磁共振、紫外-可见光谱和电化学方法对其进行了表征。在水中，由于金属到配体的电荷转移，络合物在红光区表现出强烈的吸收。电荷转移的最大吸收波长λabs_max为556 nm，670 nm处的摩尔消光系数ε为1×103M−1 cm−1。颜色的变化是可重复的。当使用DMSO和乙醇时，没有观察到颜色变化。与使用集成水溶液和冷冻水溶液的球体进行吸收相关的UV-Vis光谱显示了可重复的颜色变化。
We newly synthesized a copper(I) complex bearing a 2,2′-bicinchoninic acid dipotassium salt (biq(COOK)2) ligand and characterized the complex by elemental analysis, NMR and UV-vis spectroscopy, and electrochemistry with the help of comparative compounds. The complex in water shows intense absorption in the red light region due to metal to ligand charge transfer. The wavelength value at the absorption maximum of the charge transfer, λabs_max, is 556 nm, and the value of the molar extinction coefficient, ε, at the shoulder of the absorption at 670 nm is 1 × 103 M−1 cm−1. The water solution is purple, and the frozen one is green. The colour change is repeatable. The colour change is not observed when DMSO and ethanol are used. The UV-vis spectra related to absorption using an integrated sphere of the water solution and a frozen one show the repeatable colour change.