Synthesis of Novel Anionic Receptors with (Thio) urea and Amide Binding Sites and the Recognition Properties for Anions

✍ Scribed by Jin-Long Wu; Lan-Hna Wei; Zhen-Ya Zeng; Shun-Ying Liu; Rui Gong; Ling-Zhi Meng; Yong-Bing He

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 383 KB
• Volume: 21
• Category: Article
• ISSN: 0256-7660
• DOI: 10.1002/cjoc.20030211207

✦ Synopsis

Two new neutral receptors (1 and 2) containing (thio)urea and amide groups were synthesized by simple steps in g o d yields. The binding properties for anions of 1 and 2 were characterized by W-vis and fluorescence spectra. Receptor 1 had 811 excellent selectivity for A&-in comparison with other anions. The association constants of 1 *AcO-and 2 *p-NO2PhOW-were higher than those of other anions (Cl-, Br-, I -, H#Oi and p-NO2Ph0-). In particular, an obvious color change was observed from light yellow to golden yellow upon addition of A&to the solution of 1 in DMSO. The results of non-linear curve fitting by W-vis and fluorescence spectral data indicate that a 1:l stoichiometry complex is formed between compound 1 or 2 and anions through a hydrogen bonding interaction.