Thangaraj Anand, Bhardwaj Vinita, Sahoo Suban K
Department of Applied Chemistry, SV National Institute of Technology (SVNIT), Surat-395007, Gujarat, India.
Photochem Photobiol Sci. 2019 Jun 12;18(6):1533-1539. doi: 10.1039/c9pp00080a.
A new multi-analyte selective fluorescence chemosensor DA was synthesized by a simple one pot reaction between dansyl chloride and 2-aminobenzohydrazide in the presence of a base. In DMSO : H2O (1 : 1, v/v), the fluorescence of DA at 483 nm was blue shifted and enhanced at 474 nm along with a new shoulder peak appearing at 411 nm selectively in the presence of Cu2+ among the other tested metal ions due to the chelation enhanced fluorescence (CHEF) effect. Without any noticeable interference from potentially competitive metal ions, sensor DA can detect Cu2+ down to 9.79 × 10-7 M. Sensor DA gives satisfactory results for the quantification of Cu2+ in real water samples. Sequentially, the resultant in situ generated DA-Cu2+ complex is applied for the selective sensing of bioactive cysteine with a detection limit down to 1.76 × 10-6 M.
通过在碱存在下，使丹磺酰氯与2-氨基苯甲酰肼进行简单的一锅反应，合成了一种新型多分析物选择性荧光化学传感器DA。在二甲基亚砜：水（1：1，v/v）中，由于螯合增强荧光（CHEF）效应，在其他测试金属离子存在的情况下，DA在483nm处的荧光发生蓝移，并在474nm处增强，同时在411nm处选择性地出现一个新的肩峰。在没有潜在竞争性金属离子的明显干扰下，传感器DA能够检测低至9.79×10-7M的Cu2+。传感器DA对实际水样中Cu2+的定量分析给出了令人满意的结果。随后，原位生成的DA-Cu2+复合物用于选择性检测生物活性半胱氨酸，检测限低至1.76×10-6M。
