Benzimidazole and thiourea conjugated fluorescent hybrid receptor for selective recognition of

✍ Scribed by Gang Woo Lee; Narinder Singh; Doo Ok Jang

• Publisher: Elsevier Science
• Year: 2008
• Tongue: French
• Weight: 326 KB
• Volume: 49
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/j.tetlet.2008.01.107

✦ Synopsis

We synthesized a novel hybrid receptor bearing an array of hydrogen bond donors from benzimidazole and thiourea moieties. The recognition behavior of the receptor toward various anions has been evaluated in a DMSO/H 2 O (8:2, v/v) solvent system. The receptor showed changes in fluorescent intensity only with PO 4 3À , and it showed no such significant response to any of the other anions such as F À , Cl À , Br À , I À , CN À , ClO 4 À , H 2 PO 4 À , HPO 4 2À , AcO À , NO 2 À , CO 3 2À , HCO 3 À , SO 4 2À , and HSO 4 À . The receptor is highly selective in recognizing PO 4 3À even in the presence of other anions in aqueous DMSO.