Highly sensitive fluorescent sensor for copper (II) based on amplified fluorescence quenching of a water-soluble NIR emitting conjugated polymer

2012 ◽  
Vol 177 (3-4) ◽  
pp. 357-364 ◽  
Author(s):  
Lilin Sun ◽  
Dan Hao ◽  
Weili Shen ◽  
Zhangsheng Qian ◽  
Changqing Zhu
Keyword(s):  
Fluorescence Quenching ◽  
Conjugated Polymer ◽  
Fluorescent Sensor ◽  
Water Soluble ◽  
Highly Sensitive

Radical Scavenging Mediating Reversible Fluorescence Quenching of an Anionic Conjugated Polymer:  Highly Sensitive Probe for Antioxidants

2006 ◽  
Vol 18 (16) ◽  
pp. 3605-3610 ◽  
Author(s):  
Yanli Tang ◽  
Fang He ◽  
Minghui Yu ◽  
Shu Wang ◽  
Yuliang Li ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Conjugated Polymer ◽  
Radical Scavenging ◽  
Highly Sensitive

scholarly journals A water-soluble fluorescent chemosensor based on Asp functionalized naphthalimide for successive detection Fe3+ and H2PO4−

2018 ◽  
Vol 96 (4) ◽  
pp. 363-370 ◽  
Author(s):  
You-Ming Zhang ◽  
Xiao-Peng Chen ◽  
Guo-Yan Liang ◽  
Kai-Peng Zhong ◽  
Hong Yao ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Metal Ions ◽  
Aspartic Acid ◽  
High Selectivity ◽  
Fluorescent Sensor ◽  
Water Solution ◽  
Water Soluble ◽  
Selective Recognition ◽  
Actual Usage ◽  
Quenching Process

The selective recognition of target ions in water is very important and the development of novel water-soluble chemosensor is still an intriguing challenge. Herein, a novel water-soluble fluorescent sensor based on aspartic acid (Asp) functionalized 1,8-naphthalimide derivative (Asp-NI) has been designed and synthesized. The sensor Asp-NI could dissolve in water and successively detect Fe3+ and H2PO4− in water solution with high selectivity and sensitivity. The detection limits are 4.97 × 10−7 mol/L for Fe3+ and 5.27 × 10−6 mol/L for H2PO4−. Other coexistent competitive metal ions (Hg2+, Ag+, Ca2+, Cu2+, Co2+, Ni2+, Cd2+, Pb2+, Zn2+, Cr3+, and Mg2+) showed no interference in the Fe3+ detection process. The sensor Asp-NI could act as a Fe3+ and H2PO4− controlled “On–Off–On” fluorescent switch. More interestingly, the Fe3+ induced fluorescence quenching process could be totally reversed by the addition of H2PO4−, this “On–Off–On” switching process could be repeated several times with little fluorescence loss. Notably, the actual usage of sensor Asp-NI was further demonstrated by test kits.

scholarly journals Highly Sensitive Fluorescence Detection of Hg2+ Based on a Water-soluble Conjugated Polymer with Carboxylate Groups

2016 ◽  
Vol 32 (10) ◽  
pp. 1039-1045 ◽  
Author(s):  
Hongyu MI ◽  
Mingming GUAN ◽  
Hongyan SHAN ◽  
Qiang FEI ◽  
Yanfu HUAN ◽  
...  
Keyword(s):  
Fluorescence Detection ◽  
Conjugated Polymer ◽  
Water Soluble ◽  
Carboxylate Groups ◽  
Highly Sensitive

scholarly journals Determination of L-Argininamide Based on Water-Soluble Fluorescent Conjugated Polymer-Aptamer

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Hongliang Guan ◽  
Zhike He
Keyword(s):  
Conjugated Polymer ◽  
Specific Binding ◽  
Water Soluble ◽  
Dna Sensor ◽  
Label Free ◽  
Binding Reaction ◽  
Molecular Sensors ◽  
Free Dna ◽  
Highly Sensitive

Water-soluble fluorescent conjugated polymer is a promising material which could be used as an optical platform in highly sensitive molecular sensors. In this paper, a simple label-free DNA sensor, which consisted of a poly(3-alkoxy-4-methylthiophene) and an aptamer, was used to detect L-argininamide (L-Arm). Due to the specific binding reaction between L-Arm and its aptamer, the proposed method can easily determinate the L-Arm through the recovery of fluorescence without any modification. Other ions or similar molecules had little effect on the detection. Moreover, there was a linear relationship between fluorescence intensity and the concentration of L-Arm. The detection limit of L-Arm was as low as 4.7 nM.

A diboronic acid fluorescent sensor for selective recognition of d-ribose via fluorescence quenching

2019 ◽  
Vol 43 (11) ◽  
pp. 4385-4390 ◽  
Author(s):  
Hao Wang ◽  
Guiqian Fang ◽  
Hongxiao Wang ◽  
Jindi Dou ◽  
Zhancun Bian ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Boronic Acid ◽  
Fluorescent Sensor ◽  
Water Soluble ◽  
Selective Recognition

Herein we reported a novel boronic acid-based water-soluble sensor. It decreased the fluorescence by 50% when combined with 0.0146 M of d-ribose, while increased or not changed obviously after binding to other carbohydrates.

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