A highly selective and sensitive pH chemosensor N,N-bis[(2-thiophene)-ethyl]-3,4,9,10-perylene tetracarboxylic diimide (TEPTD) was designed and synthesized through Schiff-base condensation reaction. It exhibited large Stokes shifts, good water solubility, excellent selectivity and outstanding photo-stability. The pKa of the probe was 3.0, which indicated that it could be used in highly acid conditions
设计并通过席夫碱缩合反应合成了高选择性,高灵敏度的pH
化学传感器N,N-双[(2-
噻吩)-乙基] -3,4,9,10-per四
羧酸二
酰亚胺(
TEPTD)。它表现出较大的斯托克斯位移,良好的
水溶性,出色的选择性和出色的光稳定性。探针的p K a为3.0,表明它可以在强酸条件下使用。随着H +的添加,荧光强度逐渐增加。感应机制涉及光诱导的电子转移,质子化和去质子化,这些均由1证实。用
三氟乙酸的1 H NMR滴定实验。该探针可以用作方便的探针,通过“裸眼”区分酸性溶液与中性或碱性溶液。