Study on host–guest complexation of anions based on tri-podal naphthylthiourea derivatives
作者:Hongzhi Xie、Shan Yi、Shikang Wu
DOI:10.1039/a904942h
日期:——
A new host tris[Nâ²-naphthyl-N-(2-aminoethyl)thiourea]amine (3) and the reference compounds bis[Nâ²-naphthyl-N-(2-aminoethyl)thiourea]amine (2) and Nâ²-naphthyl-N-n-amylthiourea (1) were synthesized and used for the recognition of anionic species. Considerable changes in UV/Vis absorption of host 3 induced by complexation with H2PO4â (or HSO4â) were observed. UV/Vis spectroscopy titration experiments and 1H-NMR results both indicated the formation of 1â¶1 stable complexes between 3 and H2PO4â (or HSO4â). The stability constants of the complexes were determined in DMF. The results demonstrate that optically changeable receptors for anions may be constructed by appropriate design of host molecules.
Progressive Cation Triggered Anion Binding by Electron-Rich Scaffold: Case Study of a Neutral Tripodal Naphthyl Thiourea Receptor
作者:Utsab Manna、Gopal Das
DOI:10.1021/acs.cgd.8b00259
日期:2018.5.2
crystal X-ray analysis, and well supported by solution state NMR binding studies. The newness of this report is the systematic and consistent solid state anion binding within the inner tripodalreceptor cleft of highly electron-rich naphthyl terminals. Although the receptor L was first synthesized in the 19th century, no solid state binding studies have been reported until now. However, numerous tren-based