title: Spectroscopic properties of the receptors based on 2- and 3-linked tri(indolyl)methanes for anion binding.
abstract: 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.
authors.affiliation: Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Wei
authors.forename: Yong
authors.initials: Y
authors.lastname: Guo
authors.forename: Jian
authors.initials: J
authors.lastname: Xu
authors.forename: Shijun
authors.initials: S
authors.lastname: Shao
mesh_terms: D000838:Anions / Q000737:chemistry; D006860:Hydrogen Bonding; D007211:Indoles / Q000138:chemical synthesis / Q000737:chemistry*; D008697:Methane / Q000737:chemistry*; D015394:Molecular Structure; D012862:Skatole / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000838:Anions; D007211:Indoles; D012862:Skatole; D008697:Methane