Anion‐Coordination‐Induced Turn‐On Fluorescence of an Oligourea‐Functionalized Tetraphenylethene in a Wide Concentration Range1. Issue 26 (18th May 2014)

• Record Type: Journal Article
• Authors: Zhao, Jie; Yang, Dong; Zhao, Yanxia; Yang, Xiao‐Juan; Wang, Yao‐Yu; Wu, Biao
• Is Part Of: Angewandte Chemie international edition. Volume 53:Issue 26(2014)
• Page Start: 6632
• Page End: 6636
• Publication Date: 2014-05-18
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/anie.201402169
• Languages: English
• ISSNs: 1433-7851

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>A tetrakis(bisurea)‐decorated tetraphenylethene (TPE) ligand (<bold>L²</bold>) was designed, which, upon coordination with phosphate ions, displays fluorescence "turn‐on" over a wide concentration range, from dilute to concentrated solutions and to the solid state. The fluorescence enhancement can be attributed to the restriction of the intramolecular rotation of TPE by anion coordination. The crystal structure of the A₄L₂ (A=anion) complex of <bold>L²</bold> with monohydrogen phosphate provides direct evidence for the coordination mode of the anion. This "anion‐coordination‐induced emission" (ACIE) is another approach for fluorescence turn‐on in addition to aggregation‐induced emission (AIE).</p> </abstract>