A New Tridentate Sulfur Receptor as a Highly Sensitive and Selective Fluorescent Sensor for Cu2+ Ions. Issue 11 (22nd July 2013)

• Record Type: Journal Article
• Authors: She, Haiying; Song, Fengling; Xu, Juan; Xiong, Xiaoqing; Chen, Gengwen; Fan, Jiangli; Sun, Shiguo; Peng, Xiaojun
• Is Part Of: Chemistry, an Asian journal. Volume 8:Issue 11(2013:Nov.)
• Page Start: 2762
• Page End: 2767
• Publication Date: 2013-07-22
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1002/asia.201300534
• Languages: English
• ISSNs: 1861-4728

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>The introduction of <named-content content-type="reactionType" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">Lawesson′s reagent</named-content> into a bis‐rhodamine spirolactam system afforded a new fluorescent sensor for Cu²⁺ ions, <bold>SRR</bold>, which contained a new tridentate sulfur ligand. <bold>SRR</bold> showed excellent specificity for Cu²⁺ ions over other cations (including Cu⁺, Hg²⁺, and Fe³⁺), very high sensitivity (10 n<sc>M</sc>), and a rapid response time (3 min). The detection mechanism was investigated by ¹H NMR, ¹³C NMR, ³¹P NMR, and ESR spectroscopy, MS, and Gaussian calculations. Coordination of a Cu²⁺ ion to the tridentate sulfur ligand, which promotes ring‐opening of the rhodamine groups, followed by a spontaneous <named-content content-type="reactionType" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink">reduction reaction</named-content> (Cu²⁺ into Cu⁺), has been proposed as the sensing mechanism.</p> </abstract>