Chelation enhanced fluorescence detection of non-metal ions

A practical hydrazine-carbothioamide-based fluorescent chemosensor TCC (N-(4-chlorophenyl)-2-(thiophene-2-carbonyl)hydrazine-1-carbothioamide) was applied for Zn2+ detection. TCC exhibited selective fluorescence emission for Zn2+ and did not show any interference with other metal ions. In particular, TCC was utilized for the detection of Zn2+ in paper strips, zebrafish and real water samples. TCC could detect Zn2+ down to 0.39 μM in the solution phase and 51.13 μM in zebrafish. The association ratio between TCC and Zn2+ was determined to be 2:1 by ESI-mass and Job plot. The sensing mechanism of TCC for Zn2+ was illustrated to be a chelation-enhanced fluorescence process through spectroscopic experiments and theoretical calculations.

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BSA Au Clusters as a Probe for Enhanced Fluorescence Detection Using Multipulse Excitation Scheme

Current Pharmaceutical Biotechnology ◽

10.2174/1389201015666140523161038 ◽

2014 ◽

Vol 14 (13) ◽

pp. 1139-1144 ◽

Cited By ~ 2

Author(s):

Sangram Raut ◽

Ryan Rich ◽

Rafal Fudala ◽

R. Kokate ◽

J.D. Kimball ◽

...

Keyword(s):

Fluorescence Detection ◽

Enhanced Fluorescence ◽

Excitation Scheme ◽

Au Clusters

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Enhanced fluorescence detection of nitroaromatic compound using bacteria embedded in porous poly lactic-co-glycolic acid microbeads

The Analyst ◽

10.1039/d1an00510c ◽

2021 ◽

Author(s):

Tian Qiao ◽

Soohyun Kim ◽

Wonmok Lee ◽

Hyunjung Lee

Keyword(s):

Fluorescence Detection ◽

Glycolic Acid ◽

Nitroaromatic Compounds ◽

Nitroaromatic Compound ◽

Enhanced Fluorescence ◽

Fluorescent Biosensor ◽

Human Safety ◽

Porous Poly

The detection of explosive nitroaromatic compounds has caused worldwide concern for human safety. In this study, we introduce a fluorescent biosensor based on porous biocompatible microspheres loaded with bioreporter for...

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Noncontact Metal–Spiropyran–Metal Nanostructured Substrates with Ag and Au@SiO2 Nanoparticles Deposited in Nanohole Arrays for Surface-Enhanced Fluorescence and Trace Detection of Metal Ions

ACS Applied Nano Materials ◽

10.1021/acsanm.1c00225 ◽

2021 ◽

Vol 4 (4) ◽

pp. 3780-3789

Author(s):

Yuan Wang ◽

Lei Feng ◽

Haiyan Zhu ◽

Hongyan Miao ◽

Ying Li ◽

...

Keyword(s):

Metal Ions ◽

Sio2 Nanoparticles ◽

Trace Detection ◽

Enhanced Fluorescence ◽

Surface Enhanced Fluorescence ◽

Surface Enhanced ◽

Nanohole Arrays ◽

Nanostructured Substrates

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Acoustic Aggregation-induced Separation for Enhanced Fluorescence Detection of Alzheimer’s Biomarker

Talanta ◽

10.1016/j.talanta.2021.122517 ◽

2021 ◽

pp. 122517

Author(s):

Yue Sun ◽

Yong Luo ◽

Tailin Xu ◽

Guanzhi Cheng ◽

Hong Cai ◽

...

Keyword(s):

Fluorescence Detection ◽

Enhanced Fluorescence

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A benzothiazole-based fluorescence turn-on sensor for copper(II)

10.21203/rs.3.rs-381861/v1 ◽

2021 ◽

Author(s):

Gyeongjin Kim ◽

Donghwan Choi ◽

Cheal Kim

Keyword(s):

Charge Transfer ◽

Limit Of Detection ◽

Theoretical Calculations ◽

Enhanced Fluorescence ◽

Turn On ◽

Fluorescent Response ◽

Chelation Enhanced Fluorescence ◽

Fluorescence Turn On ◽

Internal Charge Transfer ◽

Internal Charge

Abstract A new benzothiazole-based chemosensor BTN (1-((Z)-(((E)-3-methylbenzo[d]thiazol-2(3H)-ylidene)hydrazono)methyl)naphthalen-2-ol) was synthesized for the detection of Cu2+. BTN could detect Cu2+ with “off-on” fluorescent response from colorless to yellow irrespective of presence of other cations. Limit of detection for Cu2+ was determined to be 3.3 µM. Binding ratio of BTN and Cu2+ turned out to be a 1:1 with the analysis of Job plot and ESI-MS. Sensing feature of Cu2+ by BTN was explained with theoretical calculations, which might be owing to internal charge transfer and chelation-enhanced fluorescence processes.

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