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A TICT based two-photon fluorescent probe for cysteine and homocysteine in living cells
被引:42
|作者:
Wei, Xinjie
[1
]
Yang, Xiuli
[2
]
Feng, Yan
[1
]
Ning, Peng
[1
]
Yu, Haizhu
[1
]
Zhu, Manzhou
[1
]
Xi, Xinguo
[2
]
Guo, Qingxiang
[1
,3
]
Meng, Xiangming
[1
]
机构:
[1] Anhui Univ, Dept Chem, Hefei 230601, Peoples R China
[2] Yancheng Inst Technol, Jiangsu Collaborat Innovat Ctr Ecol Bldg Mat & En, Yancheng 224051, Peoples R China
[3] Univ Sci & Technol China, Dept Chem, Hefei 230026, Peoples R China
来源:
基金:
中国国家自然科学基金;
关键词:
TICT;
Two-photon;
Fluorescent probe;
Cysteine;
Homocysteine;
INTRAMOLECULAR CHARGE-TRANSFER;
HIGH SELECTIVITY;
GLUTATHIONE;
CHEMOSENSOR;
HYDRAZINE;
MECHANISM;
NEURONS;
DESIGN;
THIOLS;
IONS;
D O I:
10.1016/j.snb.2016.03.027
中图分类号:
O65 [分析化学];
学科分类号:
070302 ;
081704 ;
摘要:
A two-photon fluorescent probe (NQ) for cysteine (Cys) and homocysteine (Hcy) was developed based on twisted-intramolecular-charge-transfer (TICT) mechanism. NQshowed excellent "OFF-ON" fluorescence (at 540 nm) detection signal on addition of Cys/Hcy with high selectivity. The detection mechanism was successfully proved by theoretical calculations, viscosity dependent fluorescence and time resolved fluorescence spectra. NQ exhibits large two-photon absorption (TPA) cross-section with Cys/Hcy (580 and 710 GM) at nearly 800 nm, respectively. Cell-culture results indicated that NQ was cell-permeable and could be used to detect Cys/Hcy with low cytotoxicity under two-photon excitation in living cells. To our best knowledge, NQ is the first TICT based two-photon fluorescent probe for Cys/Hcy. (C) 2016 Elsevier B.V. All rights reserved.
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页码:285 / 292
页数:8
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