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首页> 外文期刊>RSC Advances >A fluorescent Cu(ii) complex as a dual functional sensor for selective and sensitive detection of acetone and Cd(ii) pollutants
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A fluorescent Cu(ii) complex as a dual functional sensor for selective and sensitive detection of acetone and Cd(ii) pollutants

机译：作为双函数传感器的荧光Cu（II）复合物，用于选择性和敏感检测丙酮和CD（II）污染物

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In this study, Cu ~(2+) perchlorate complexes of 3,5-dimetylpyrazole(dmpy), namely [Cu(dmpy) _(3) (H _(2) O) _(2) ](H _(2) O)(ClO _(4) ) _(2) ( 1 ), were prepared and characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), infrared (IR) spectroscopy, elemental analysis, mass spectrometry, and ultraviolet visible (UV-Vis) spectroscopy. It was determined that Cu ~(2+) coordinated to the nitrogen atoms of three dmpy molecules as well as to the oxygen atoms of two H _(2) O molecules in a square pyramidal geometry. To balance the charge, two uncoordinated perchlorate anions and one H _(2) O molecule were also present in the lattice. The resulting Cu ~(2+) complex was involved in extensive hydrogen bonding, which stabilized the structure. The fluorescence properties of complex 1 were studied in acetonitrile at room temperature upon the addition of different organic solvents. It was confirmed that the complex exhibited remarkable acetone selectivity via a fluorescence quenching mechanism. At low concentrations, the fluorescence intensities were nearly completely quenched via a turn-off mode. Moreover, complex 1 displayed exceptional selectivity, fast detection time, and high sensitivity for Cd ~(2+) in aqueous solutions via a fluorescence enhancement mechanism (turn-on mode). Hence, the prepared complex showed potential for application in Cd ~(2+) detection. Notably, in an aqueous solution, complex 1 exhibited highly selective fluorescence enhancement effects (turn-on mode) with respect to Cd ~(2+) and was not affected by the interference of other metal ions.
机译：在该研究中，Cu〜（2+）高氯酸盐配合物为3,5-二甲基吡唑（DMPY），即[Cu（DMPY）_（3）（H _（2）O）_（2）]（H _（2） ）O）（Clo _（4））_（2）（1），由X射线衍射（XRD），热重分析（TGA），红外（IR）光谱，元素分析，质谱，和紫外线可见（UV-VI）光谱。确定Cu〜（2+）与三种DMPE分子的氮原子配位以及正方形锥形几何形状中的两个H _（2）O分子的氧原子。为了平衡电荷，在晶格中也存在两个未加入的高氯酸根阴离子和一个H _（2）O分子。得到的Cu〜（2+）复合物涉及广泛的氢键，稳定该结构。在加入不同的有机溶剂时，在室温下在乙腈中在乙腈中研究复合物1的荧光性质。证实，该复合物通过荧光猝灭机理表现出显着的丙酮选择性。在低浓度下，通过关闭模式几乎完全淬灭荧光强度。此外，通过荧光增强机构（开启模式），复合1显示出卓越的选择性，快速检测时间和对CD〜（2+）的CD〜（2+）的高灵敏度。因此，制备的复合物显示出在CD〜（2+）检测中的应用潜力。值得注意的是，在水溶液中，复合物1相对于CD〜（2+）表现出高度选择性的荧光增强效应（导通模式），并且不受其他金属离子的干扰的影响。

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