Ratiometric fluorescence assay for sulfide ions with fluorescent MOF-based nanozyme

NWIPB OpenIR

	Ratiometric fluorescence assay for sulfide ions with fluorescent MOF-based nanozyme
	Zhu, Nianlei; Deng, Tinghui; Zuo, Ya-Nan; Sun, Jing; Liu, Huwei; Zhao, Xian-En; Zhu, Shuyun
	2023
发表期刊	SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
卷号	295
摘要	A novel ratiometric fluorescence strategy for sulfide ions (S2-) analysis has been developed using metal-organic framework (MOF)-based nanozyme. NH2-Cu-MOF displays blue fluorescence (lambda em = 435 nm) originating from 2-amino-1,4-benzenedicarboxylic acid ligand. Besides, it possesses oxidase-like activity due to Cu2+ node, which can trigger chromogenic reaction. o-Phenylenediamine (OPD), as a common enzyme substrate, can be oxidized by NH2-Cu-MOF to form luminescent products (oxOPD) (lambda em = 570 nm). Inner filter effect occurs between oxOPD and MOF. Upon exposure to S2-, oxidase-like activity of MOF is depressed significantly because of the generation of CuS. On one hand, the amount of free Cu2+ decreases, affecting the yielding of oxOPD. On the other hand, CuNPs with larger size are obtained during the oxidation-reduction reaction between Cu2+ and OPD, which show weaker autocatalytic ability for OPD oxidation. These result in the decrease and increase of intensities at 570 and 435 nm, respectively. This method exhibits sensitive and selective responses towards S2 -with LOD of 0.1 mu M. Furthermore, such ratiometric strategy has been applied to detect S2-in food samples.
收录类别	SCIE
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/61678
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Zhu, Nianlei,Deng, Tinghui,Zuo, Ya-Nan,et al. Ratiometric fluorescence assay for sulfide ions with fluorescent MOF-based nanozyme[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,2023,295.
APA	Zhu, Nianlei.,Deng, Tinghui.,Zuo, Ya-Nan.,Sun, Jing.,Liu, Huwei.,...&Zhu, Shuyun.(2023).Ratiometric fluorescence assay for sulfide ions with fluorescent MOF-based nanozyme.SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY,295.
MLA	Zhu, Nianlei,et al."Ratiometric fluorescence assay for sulfide ions with fluorescent MOF-based nanozyme".SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 295(2023).