Back to Search
Start Over
C 2-symmetrical hexaazatriphenylene derivatives as colorimetric and ratiometric fluorescence chemsensors for Zn2+.
- 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