Ratiometry of monomer/excimer emissions of dipyrenyl thiacalix[4]arene for Cu2+ detection:: a potential Cu2+ and K+ switched INHIBIT logic gate with NOT and YES logic functions

被引:58
作者
Dhir, Abhimanew [1 ]
Bhalla, Vandana [1 ]
Kumar, Manoj [1 ]
机构
[1] Guru Nanak Dev Univ, Dept Chem, Amritsar 143005, Punjab, India
关键词
D O I
10.1016/j.tetlet.2008.04.155
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
A new thiacalix[4]arene derivative 2 of 1,3-alternate conformation possessing two pyrene groups has been synthesized and examined for its cation recognition abilities towards different cations such as lithium, sodium, potassium, nickel, zinc, cadmium, silver, mercury, lead and copper by fluorescence spectroscopy. In CH3CN/CH2Cl2 (1:1), the presence of Cu(II) induces the formation of a 1:2 ligand/metal complex, which exhibits increasing monomer emission at 376 nm at the expense of the fluorescent excimer emission of 2 centered at 476 nm. In the presence of K-,(+) the intensity of the excimer emission increases along with the formation of a new blue shifted band at 435 nm which corresponds to a static dinner. The compound behaves as a fluorescent molecular switch upon chemical input of Cu2+ and K+. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:4227 / 4230
页数:4
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