An Efficient Fluorescence "Turn-On" Chemosensor Comprising of Coumarin and Rhodamine Moieties for Al3+ and Hg2+

被引：17
|
作者：
Acharyya, Samik [1 ]
Gharami, Saswati [1 ]
Patra, Lakshman [1 ]
Mondal, Tapan Kumar [1 ]
机构：
[1] Jadavpur Univ, Dept Chem, Kolkata 700032, India
来源：
JOURNAL OF FLUORESCENCE | 2017年 / 27卷 / 06期
关键词：
Fluorescence turn-on sensor; Rhodamine-coumarin based chemosensor; Detection of Hg2+ and Al3+; DFT calculation; DENSITY-FUNCTIONAL THEORY; EXCITATION-ENERGIES; ALZHEIMERS-DISEASE; BREAST-CANCER; ALUMINUM; MERCURY; IONS; MOLECULES; MODEL; APPROXIMATION;
D O I：
10.1007/s10895-017-2144-9
中图分类号：
Q5 [生物化学];
学科分类号：
071010 ; 081704 ;
摘要：
A potent fluorescence 'turn-on' receptor (HL) based on rhodamine and coumarin moieties for the detection of Hg2+ and Al3+ is synthesized by condensation of rhodamine 6G hydrazide and 4-hydroxy-3-acetylcoumarin. In presence of Al3+ and/or Hg2+ the receptor (HL) exhibits deep pink colouration and a sharp band at 528 nm is appeared in UV-vis titration. Upon gradual addition of Al3+ and/or Hg2+ to the solution of HL significant enhancement of fluorescence intensity is observed at 564 nm in MeCN:H2O (1:5, v/v) medium. The receptor is strongly bound to Al3+ and/or Hg2+ and the association constants (K-a) are found to be 1.74 x 10(4) and 1.04 x 10(4) M- 1 for Al3+ and Hg2+ respectively.
引用
收藏
页码：2051 / 2057
页数：7
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