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C 2-symmetrical hexaazatriphenylene derivatives as colorimetric and ratiometric fluorescence chemsensors for Zn2+.

Authors :
Zhang, Xiao-Hong
Zhao, Qiang
Liu, Xiu-Ming
Hu, Tong-Liang
Han, Jie
Ruan, Wen-Juan
Bu, Xian-He
Source :
Talanta. Apr2013, Vol. 108, p150-156. 7p.
Publication Year :
2013

Abstract

Abstract: Two C 2-symmetrical hexaazatriphenylene (HAT) derivatives, 2,3-diphenyl-6,7,10,11-tetra(pyridin-2-yl)dipyrazino[2,3-f:2′,3′-h]quinoxaline (1) and 2,3,6,7-tetraphenyl-10,11-di(pyridin-2-yl)dipyrazino[2,3-f:2′,3′-h]quinoxaline (2), were designed and synthesized by the condensation reaction of 1,2-diamines and 1,2-diketones. Both compounds 1 and 2 exhibit sensitive, ratiometric and colorimetric fluorescence selectivity for Zn2+ ion over alkali ions, alkaline earth ions and a wide range of transition metal ions upon excitation at 350nm in acetonitrile/water. The interactions between 1 or 2 and Zn2+ can be observed by naked eyes with an obvious color change of the solution from colorless to yellow. For fluorescence intensity of 2 toward Zn2+, a good linearity (correlation coefficient R 2=0.993) was established with a detection limit of 0.095μM, which is more sensitive than that of 1 (0.2μM). The binding modes of the free ligands 1 and 2 with Zn2+ are discussed in context to their photophysical and electrochemical properties as well as single X-ray crystallographic structures of 1, 2 and 1-Zn. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
00399140
Volume :
108
Database :
Academic Search Index
Journal :
Talanta
Publication Type :
Academic Journal
Accession number :
89192488
Full Text :
https://doi.org/10.1016/j.talanta.2013.02.071