A red-shift colorimetric and fluorescent sensor for Cu2+ in aqueous solution: unsymmetrical 4,5-diaminonaphthalimide with N-H deprotonation induced by metal ions
A red-shift colorimetric and fluorescent sensor for Cu2+ in aqueous solution: unsymmetrical 4,5-diaminonaphthalimide with N-H deprotonation induced by metal ions
复制标题
水溶液中 Cu2+ 的红移比色荧光传感器：金属离子诱导 N-H 去质子化的不对称 4,5-二氨基萘酰亚胺
DOI：
10.1039/b818611a
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发表时间：
2009-01-01
影响因子：
3.2
通讯作者：
Qian, Xuhong
中科院分区：
文献类型：
--
作者：
Huang, Junhai;Xu, Yufang;Qian, Xuhong
设计并合成了4，5-二氨基-1，8-萘酰亚胺（DNP）化学传感器H1。探针H1在中性水溶液中特异性识别Cu ~（2+）离子。该受体对Cu ~（2+）的捕获导致与1，8-萘二甲酰亚胺生色团结合的仲胺脱质子化，从而大大增强了“N”原子的供电子能力，使探针H1的吸收峰红移50 nm（从464 nm红移到514 nm），并具有很大的比色响应，同时还表现出开关荧光响应。具体而言，H1是在6.0至12.0范围内的pH无关传感器，并且可以用作强碱性条件下Cu 2+的探针。这些结果为构建红移比色和荧光传感器开辟了新的可能性。
4,5-Diamino-1,8-naphthalimide (DNP)-based chemosensor H1 was designed and synthesized. Probe H1 specifically recognized Cu2+ ions in neutral aqueous solution. The capture of Cu2+ by the receptor resulted in deprotonation of the secondary amine conjugated to the 1,8-naphthalimide chromophore, so that the electron-donation ability of the "N" atom would be greatly enhanced; thus probe H1 showed a 50 nm red-shift in absorption (from 464 nm to 514 nm) and a large colorimetric response, it also exhibited an on-off fluorescent response. Specifically, H1 is a pH-independent sensor in the range of 6.0 to 12.0 and can be used as a probe for Cu2+ in strong basic conditions. These results opened up new possibilities for construction of red-shift colorimetric and fluorescent sensors.