Volume 53, Issue 26 pp. 6632-6636
Communication

Anion-Coordination-Induced Turn-On Fluorescence of an Oligourea-Functionalized Tetraphenylethene in a Wide Concentration Range

Jie Zhao

Jie Zhao

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)

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Dong Yang

Dong Yang

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)

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Dr. Yanxia Zhao

Dr. Yanxia Zhao

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)

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Prof. Xiao-Juan Yang

Prof. Xiao-Juan Yang

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)

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Prof. Yao-Yu Wang

Prof. Yao-Yu Wang

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)

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Prof. Biao Wu

Corresponding Author

Prof. Biao Wu

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)

State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000 (China)

Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, College of Chemistry and Materials Science, Northwest University, Xi'an 710069 (China)Search for more papers by this author
First published: 18 May 2014
Citations: 158

This work was supported by the National Natural Science Foundation of China (21271149 and 21325102). We thank the referees for their helpful comments.

Graphical Abstract

Phosphate ions in a bind: The tetrakis(bisurea)-decorated tetraphenylethene (TPE) displays fluorescence “turn-on” over a wide concentration range upon phosphate coordination. The fluorescence enhancement can be attributed to the restriction of the intramolecular rotation of TPE by anion coordination. This “anion-coordination-induced emission” (ACIE) is another approach for fluorescence turn-on.

Abstract

A tetrakis(bisurea)-decorated tetraphenylethene (TPE) ligand (L2) 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 L2 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).

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