The hydrogen sulfate recognition properties of azo-salicylaldehyde schiff base receptors

• 来源期刊: 中国科学B辑(英文版)
• 年，卷（期）: 2008,（11）
• 页码范围: 1051-1056
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11426-008-0113-5

摘要

Azo-salicylaldehyde Schiff base-typed receptors containing an acidic H-bond donor moiety were syn-thesized and characterized. The UV-Vis data indicate that these receptors could act as selective col-orimetric sensors for basic anions and acidic species hydrogen sulfate by different color changes in a water-containing medium, The experiment of Brφnsted acid-base reaction by adding the sodium hy-droxide or perchloric acid revealed that the mechanism of recognition of anions might be deprotona-tion/protonation of the OH fragments by interacting with different anions and that the deprotona-tion/protonation process is fully reversible. The deprotonation/protonation of the receptors is respon-sible for the dramatic color change.