Application of l-cysteine capped core–shell CdTe/ZnS nanoparticles as a fluorescence probe for cephalexin

2014 ◽  
Vol 6 (8) ◽  
pp. 2715-2721 ◽  
Author(s):  
Li Li ◽  
Qiaolin Zhang ◽  
Yaping Ding ◽  
Xiaoyong Cai ◽  
Shuqing Gu ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Fluorescence Probe ◽  
Aqueous System ◽  
Core Shell ◽  
Zns Nanoparticles ◽  
Good Probe

l-Cysteine capped CdTe/ZnS NPs were prepared in an aqueous system and the fluorescence intensity was significantly reduced when the concentration of cephalexin increased, which proves a good probe for determination of cephalexin in pharmaceutical fields.

Preparation and application of cysteine-capped ZnS nanoparticles as fluorescence probe in the determination of nucleic acids

2004 ◽  
Vol 60 (8-9) ◽  
pp. 1719-1724 ◽  
Author(s):  
Yongxin Li ◽  
Jinlong Chen ◽  
Changqin Zhu ◽  
Lun Wang ◽  
Danhua Zhao ◽  
...  
Keyword(s):  
Nucleic Acids ◽  
Fluorescence Probe ◽  
Zns Nanoparticles

A selective fluorescence probe for copper(II) ion in aqueous solution based on a 1,8-naphthalimide Schiff base derivative

2019 ◽  
Vol 74 (9) ◽  
pp. 665-670
Author(s):  
Yao Qu ◽  
Yancong Wu ◽  
Cong Wang ◽  
Kun Zhao ◽  
Huilu Wu
Keyword(s):  
Schiff Base ◽  
Fluorescence Intensity ◽  
Fluorescence Probe ◽  
Yellow River ◽  
Tap Water ◽  
Flight Mass Spectrometry ◽  
Plot Analysis ◽  
Base Derivative ◽  
Ethanesulfonic Acid

AbstractIn order to realize real-time monitoring of Cu2+, a new fluorescent probe HL, a Schiff base derivative of N-n-butyl-4-[2]-1,8-naphthalimide, has been designed and synthesized. In methanol-HEPES [2-(4-(2-hydroxyethyl)-1-piperazinyl)-ethanesulfonic acid] solution (1:1, v/v, pH = 7.4) HL showed excellent selectivity towards Cu2+ over other common coexisting metal ions. The fluorescence intensity for HL showed a good linearity with the concentration of Cu2+ ions in the range of 0.5–5.0 μm. Based on combined fluorescence titration, Job’s plot analysis, and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry results, Cu2+ forms a 1:2 complex with L. The fluorescence intensity of HL exhibits significant quenching after binding with Cu2+, owing to the strong, intrinsic paramagnetic behavior of Cu2+. Ultimately, in order to test the performance of the synthesized probe, HL was preliminarily applied to the determination of Cu2+ in the Yellow River and in tap water with satisfying results.

Cu (II), Zn (II) Complexes Containing Calix [4] Arene Modified by Salicylaldehyde Acylhydrazone - Synthesis, Properties and Application

2012 ◽  
Vol 455-456 ◽  
pp. 1244-1250 ◽  
Author(s):  
Xiao Mei Zhang ◽  
Guo Cai Xu ◽  
Jia Long Sun
Keyword(s):  
Correlation Coefficient ◽  
Fluorescence Intensity ◽  
Elemental Analysis ◽  
Fluorescence Probe ◽  
Minimum Concentration ◽  
Good Linearity ◽  
Synthesis Properties ◽  
Arene Ligand

Two complexes L(MAcO)2(M=Cu, Zn) containing calix [4] arene ligand H2L modified by salicylaldehyde acylhydrazone have been synthesized and characterized by elemental analysis, MS(ESI), IR, UV-vis and fluorescence. Whereas L(ZnAcO)2exhibited an enhancement in fluorescence, the potentiality of H2L acting as a Zn2+- selective fluorescence probe was investigated. Results showed that a good linearity (correlation coefficient 0.999) between fluorescence intensity and concentration of Zn2+in range of 4.0×10-6mol·L-1~ 4.0×10-5mol·L-1existed in H2L solution of 1.0×10-4mol·L-1. The minimum concentration at which H2L could detect Zn2+was 1.0 ×10–6mol·L-1. Co-existence of Cu2+, Ni2+and Mn2+would interfere the determination of Zn2+, but no influence by Na+, Mg2+, Cd2+and Pb2+.

Preparation and Application of a Novel Core-Shell Organic Nanoparticle as a Fluorescence Probe in the Determination of Nucleic Acids

2005 ◽  
Vol 149 (3-4) ◽  
pp. 267-272 ◽  
Author(s):  
Lun Wang ◽  
Tingting Xia ◽  
Leyu Wang ◽  
Hongqi Chen ◽  
Ling Dong ◽  
...  
Keyword(s):  
Nucleic Acids ◽  
Fluorescence Probe ◽  
Core Shell

Aqueous Synthesis of CdTe/CdSe Core/Shell Quantum Dots as pH-Sensitive Fluorescence Probe for the Determination of Ascorbic Acid

2010 ◽  
Vol 21 (3) ◽  
pp. 1123-1129 ◽  
Author(s):  
Shan-Shan Yang ◽  
Cui-Ling Ren ◽  
Zhen-Yang Zhang ◽  
Jun-Jie Hao ◽  
Qin Hu ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ascorbic Acid ◽  
Fluorescence Probe ◽  
Ph Sensitive ◽  
Core Shell ◽  
Cdse Core ◽  
Aqueous Synthesis

Synthesis of Functionalized Core-Shell CdTe/ZnS Nanoparticles and Their Application as a Fluorescence Probe for Norfloxacin Determination

2013 ◽  
Vol 2013 (14) ◽  
pp. 2564-2570 ◽  
Author(s):  
Li Li ◽  
Yu Cheng ◽  
Yaping Ding ◽  
Shuqing Gu ◽  
Fenfen Zhang ◽  
...  
Keyword(s):  
Fluorescence Probe ◽  
Core Shell ◽  
Zns Nanoparticles

Study on Synthesis and Characterization of a Fluorescence Probe and its Application for Determination of Superoxide Anion Radical

2011 ◽  
Vol 393-395 ◽  
pp. 1483-1487 ◽  
Author(s):  
Yong Qiang Zhao ◽  
Hong Lin ◽  
Lai Hao Li ◽  
Xian Qing Yang ◽  
Shu Xian Hao ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Superoxide Anion ◽  
Anion Radical ◽  
Fluorescence Probe ◽  
High Sensitivity ◽  
Superoxide Anion Radical ◽  
Synthetic Product ◽  
Pyrogallol Autoxidation

A novel Schiff base, 2-(Salicylideneamino)pyridine (2-SAP) synthesized by 2-aminopyridine and salicylaldehyde was used as a fluorescence probe to determine superoxide anion radical (O2•-) in this study. The synthetic product was characterized by IR, 1H-NMR and GC-MS methods. A fluorescence quenching reaction occurs between 2-SAP and O2•-, and the fluorescence intensity decreased significantly. The effect of pyrogallol concentration (2.0×10-5 M to1.0×10-3 M) was discussed in this study. In the range from 2.0×10-5 M to 1.0×10-4 M, relative fluorescence intensity (y) and pyrogallol concentration (x) shown a good linear relationship, y=37.801x+76.854, r=0.993. Based on this phenomenon, the O2•- generated by pyrogallol autoxidation could be determined simply with high sensitivity.

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