Geng Lijun, Li Yajuan, Wang Zengyao, Wang Yanqiu, Feng Guoliang, Pang Xuelei, Yu Xudong
Hebei Research Center of Pharmaceutical and Chemical Engineering, and College of Science, Hebei University of Science and Technology, Yuhua Road 70, Shijiazhuang 050080, P. R. China.
Soft Matter. 2015 Nov 7;11(41):8100-4. doi: 10.1039/c5sm01851j.
A new kind of terpyridine-based Ca(2+) sensor TS was designed and studied based on the internal charge transfer (ICT). In the diluted solution state, TS sensed Ca(2+) and Mg(2+) ions among test ions via an "off-on" approach as seen from fluorescence spectra of test ions. Moreover, TS was able to form stable fluorescent gels in organic solvents accelerated by ultrasound, indicating the ultrasound responsive properties of TS molecules. The S-gel of TS could be successfully used to selectively recognize Ca(2+) through fluorescent emission color and morphological changes, which was different from that of the solution state. It was predicated that the competition between the self-assembly of TS molecules and the host–guest interaction of TS with Ca(2+) or Mg(2+) was responsible for the sensing properties. To the best of our knowledge, this is the first example that organogels could selectively sense Ca2+ ions.
基于分子内电荷转移（ICT）设计并研究了一种新型的基于三联吡啶的Ca(2+)传感器TS。在稀释溶液状态下，从测试离子的荧光光谱可以看出，TS通过“关-开”方法在测试离子中检测Ca(2+)和Mg(2+)离子。此外，TS能够在超声加速下在有机溶剂中形成稳定的荧光凝胶，表明TS分子具有超声响应特性。TS的S-凝胶可以通过荧光发射颜色和形态变化成功用于选择性识别Ca(2+)，这与溶液状态不同。据推测，TS分子的自组装与TS与Ca(2+)或Mg(2+)的主客体相互作用之间的竞争是传感特性的原因。据我们所知，这是有机凝胶能够选择性检测Ca2+离子的首个实例。
