Selective Chemosensor of Fe3+ Based on Fluorescence Quenching by 2, 2′‐Bisbenzimidazole Derivative in Aqueous Media. Issue 4 (3rd April 2013)

• Record Type: Journal Article
• Authors: Wei, Taibao; Liu, Jun; Yao, Hong; Lin, Qi; Xie, Yongqiang; Shi, Bingbing; Zhang, Peng; You, Xingmei; Zhang, Youming
• Is Part Of: Chinese journal of chemistry. Volume 31:Issue 4(2013:Apr.)
• Page Start: 515
• Page End: 519
• Publication Date: 2013-04-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cjoc.201300019
• Languages: English
• ISSNs: 1001-604X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>2, 2′‐Bisbenzimidazole derivative (<bold>L</bold>) was designed as a fluorescent chemosensor for Fe³⁺. This structurally simple chemosensor displays significant fluorescence quenching with increasing concentrations of Fe³⁺. <bold>L</bold> exhibited high selectivity and antidisturbance for Fe³⁺ among environmentally relevant metal ions in aqueous media. The method of Job's plot indicated the formation of 1:2 complex between <bold>L</bold> and Fe³⁺, and the possible binding mode of the system was also proposed. In addition, further study demonstrates the detection limit on fluorescence response of the sensor to Fe³⁺ is down to 10⁻⁷ mol·L⁻¹ range. The binding mode was investigated by fluorescence spectra, ESI‐MS, IR data, ¹H NMR, ¹³C NMR and crystal data.</p> </abstract>