Highly selective and sensitive colorimetric and fluorescent chemosensor of Fe3+ and Cu2+ based on 2,3,3-trimethylnaphto[1,2-d] squaraine

作者：Wang, Yue; Wang, Can; Xue, Su; Liang, Qian; Li, Zhongyu^*; Xu, Song^*

来源：RSC Advances, 2016, 6(8): 6540-6550.

DOI：10.1039/c5ra22530b

• SCHIFF-BASE
• AQUEOUS-SOLUTION
• LIVING CELLS
• DYES
• AGGREGATION
• ABSORPTION
• COPPER
• DERIVATIVES
• CU(II)
• PROBE

A squarylium dye, 2,3,3-trimethylnaphto[1,2-d]pyrrole squaraine (TPSQ) based dual signaling probe was found to exhibit colorimetric and fluorescent properties on selective binding towards Fe3+ and Cu2+ in ethanol/water (4 : 1, v/v) solution, respectively. The binding constants were determined to be 6.22 x 10(4) M-1 and 4.08 x 10(4) M-1 for Fe3+ and Cu2+, respectively. Most importantly, the 1 : 1 stoichiometry of the host-guest complexation was confirmed by Job's method. Meanwhile, the selectivity experiments revealed that the colorimetric and fluorescent sensor were specific for Fe3+ and Cu2+ even with interference by high concentrations of other metal ions. Moreover, the sensing abilities of the receptor toward Fe3+ and Cu2+ were also investigated by electrochemical technique. The present results indicated that the TPSQ chemosensor could be adopted as a sensitive and reversible colorimetric and fluorescent sensor for Fe3+ and Cu2+.

• 出版日期2016
• 单位沈阳大学; 常州大学