Self-assembled nanosensor based on squaraine dye for specific recognition and detection of human serum albumin
文献类型: 外文期刊
第一作者: Guo, Yanyan
作者: Guo, Yanyan;Chen, Yiping;Zhu, Xiaochan;Fu, Nanyan;Guo, Yanyan;Chen, Yiping;Zhu, Xiaochan;Fu, Nanyan;Guo, Yanyan;Chen, Yiping;Zhu, Xiaochan;Fu, Nanyan;Pan, Zhizhen;Zhang, Xiangyu;Wang, Jian
作者机构:
关键词: Squaraine;Self-assembly;Nanosensor;Human serum albumin;Disaggregation;Fluorescent probe
期刊名称:SENSORS AND ACTUATORS B-CHEMICAL ( 影响因子:7.46; 五年影响因子:6.743 )
ISSN: 0925-4005
年卷期: 2018 年 255 卷
页码:
收录情况: SCI
摘要: "Aggregation-caused signal change", a well-established mechanism, should not be ignored for sensing, while small molecule based on self-assembly and disaggregation has been studied and used for protein detection. In this work, we have synthesized a novel fluorescent chemosensor SQ with a polyether chain to enhance water solubility, and this has been used for the detection of human serum albumin (HSA) in aqueous solution with excellent sensitivity and selectivity. SQ was aggregated into nanoparticles with an average particle size of 458 nm in neutral solution and showed fluorescence silent due to the aggregation induced quenching. However, addition of HSA decreased the average particle size of SQ to 295 nm and released the fluorescence because of the reassembly of the SQ-HSA complex. More importantly, HSA could be selectively detected in the presence of other biological proteins and the main physiological inorganic anions and cations with the detection limit estimated as 15.6 nM according to 3 sigma/k. This versatile strategy suggests that squaraine dyes can be used as fluorescence-enhanced probes for the quantitative detection of HSA as well as in applications for the detection of HSA in urine samples. (C) 2017 Elsevier B.V. All rights reserved.
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