A water soluble FRET-based ratiometric chemosensor for Hg(II) and S2- applicable in living cell staining

被引:42
作者
Sen, Buddhadeb [1 ]
Mukherjee, Manjira [1 ]
Pal, Siddhartha [1 ]
Dhara, Koushik [2 ]
Mandal, Sushil Kumar [3 ]
Khuda-Bukhsh, Anisur Rahman [3 ]
Chattopadhyay, Pabitra [1 ]
机构
[1] Univ Burdwan, Dept Chem, Burdwan 713104, W Bengal, India
[2] Sambhu Nath Coll, Dept Chem, Birbhum 731303, WB, India
[3] Kalyani Univ, Dept Zool, Mol Biol & Genet Lab, Kalyani, W Bengal, India
关键词
RHODAMINE-BASED FLUORESCENT; HYDROGEN-SULFIDE; ON CHEMOSENSOR; HG2+ IONS; MERCURY; PROBE; DERIVATIVES; GENERATION; SENSOR; H2S;
D O I
10.1039/c3ra47800a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A new highly sensitive and selective Hg(II) probe, 2-(rhodamine-b-hydrazido)-N-(quinolin-8-yl) acetamide (L-1) was developed and characterized. L-1 specifically binds to Hg(II) in the presence of a large excess of other competing ions with visually observable changes in both electronic and fluorescence spectral behaviour to make possible the naked eye detection of Hg(II) at a very low level (up to 4.5 x 10(-7) M) through a fluorescence resonance energy transfer (FRET) process in HEPES buffer (1 mM, pH 7.4; 2% EtOH) at 25 degrees C. The theoretical and experimental kinetic study also support the binding of Hg(II) ion to induce the opening of the spirolactam ring in L-1 for enabling the FRET process. Further studies reveal that the selective dissociation of the L-Hg complex in the presence of sulphide anions to restore the native structure of L-1 is also useful in the detection of sulfide anions with a detection limit of a submicromolar range in the same medium of HEPES buffer (1 mM, pH 7.4; 2% EtOH) at 25 degrees C. L-1 could be employed as a FRET based time dependent reversible chemosensor for imaging Hg(II) in living cells and whole bodies, and also could be used as an imaging probe for the detection of sulfide anions in HeLa cells.
引用
收藏
页码:14919 / 14927
页数:9
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