Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China.
Spectrochim Acta A Mol Biomol Spectrosc. 2010 Oct 15;77(3):620-4. doi: 10.1016/j.saa.2010.06.036. Epub 2010 Jun 30.
The anion binding properties of two title tri(indolyl)methane compounds have been evaluated by using UV-vis absorption and fluorescence spectroscopy. Different from 3-linked receptor which exhibited faint even no obvious spectral response to anions, 2-linked receptor can bind F(-), AcO(-) and H(2)PO(4)(-), with the bathochromic shifts of the UV absorption and fluorescence quenching. This selectivity will be attributed to suitable steric array of NH binding sites of 2-linked receptor, which helps to form multiple hydrogen bonding interactions with anions.
我们采用紫外-可见吸收光谱和荧光光谱法研究了两种标题三（吲哚基）甲烷化合物的阴离子键合特性。与 3 连接受体对阴离子表现出微弱甚至没有明显的光谱响应不同，2 连接受体可以与 F(-)、AcO(-)和 H(2)PO(4)(-)结合，导致紫外吸收和荧光猝灭的红移。这种选择性归因于 2 连接受体 NH 结合位点的合适空间排列，有助于与阴离子形成多个氢键相互作用。
