Journal ArticleDOI
A pyrene-containing Schiff base fluorescent ratiometric probe for the detection of Cu2+ in aqueous solutions and in cells
Li-Jun Ma,Qingjian Liang,Ruihong Feng,Zu Lv,Fengchao Cui,Ligui Li,Liting Yang,Hong Liu,Fengqiang Sun +8 more
TLDR
In this article, a highly selective and sensitive fluorescent ratiometric probe (1) based on pyrene-containing Schiff base for the dection of Cu2+ was synthesized.Abstract:
A highly selective and sensitive fluorescent ratiometric probe (1) based on pyrene-containing Schiff base for the dection of Cu2+ was synthesized. In acetonitrile–HEPES buffer solution (20.0 mM HEPES, 8:2, v/v, pH 7.4), only Cu2+, out of tested common cations, could induce the aggregation of probe 1. Fluorescence analysis showed that the excimer emission band of pyrene groups of probe 1 appeared and gradually increased with the addition of Cu2+. The fluorescent intensity ratio of excimer and monomer (I470/I409) of probe 1 increased 27.8-fold upon the addition of one equiv. of Cu2+ with a detection limit of 20.2 nM (1.28 ppb). The addition of Cu2+ also induced obvious color change and the characteristic peaks of pyrene excimer in UV–vis spectrometra of the relutant solution. Results from the Job plot, metal-binding fluorescent titration, mass spectra experiments and density functional theory calculations indicated a binding ratio of 2:1 (probe 1: Cu2+). In addition, probe 1 showed good potential as a fluorescent visualizing probe for the detection of Cu2+ in living GS cells of epinepheluscoioides.read more
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Peptide-based colorimetric and fluorescent dual-functional probe for sequential detection of copper(Ⅱ) and cyanide ions and its application in real water samples, test strips and living cells.
Peng-Fei Wang,Shirui Xue,Dagang Zhou,Zhouquan Guo,Qifan Wang,Bingxue Guo,Xiu Pei Yang,Jiang Wu +7 more
TL;DR: A dual-functional peptide probe FLH based on fluorescent "on-off-on" strategy and colorimetric visualization method was designed and synthesized as mentioned in this paper , which exhibited highly selective and rapid detection of Cu2+ with significant fluorescent "turn-off" response, with a visible colourimetric change from yellow to orange.
Journal ArticleDOI
A simple triphenylamine based turn-off fluorescent sensor for copper (II) ion detection in semi-aqueous solutions
Dhanushkodi Mohanasundaram,R. Bhaskar,N. Lenin,Kasi Nehru,Gurusamy Rajagopal,Gujuluva Gangatharan Vinoth Kumar,Jegathalaprathaban Rajesh +6 more
TL;DR: An efficient donor triphenylamine aldehyde Schiff-base with p-toluene sulfonyl hydrazine fluorescent probe (TPA-PTH) was synthesized and characterized by various spectroscopic techniques as mentioned in this paper .
Journal ArticleDOI
Detection of Heavy Metal Ions by Ratiometric Photoelectric Sensor.
TL;DR: In this article , the harm and limit standards of heavy metals were systematically summarized and the common analysis methods were overviewed and compared, which provided the reference for the further research and application of the ratiometric photoelectric sensor.
Journal ArticleDOI
A novel coumarin-benzopyrylium based near-infrared fluorescent probe for Hg2+ and its practical applications
TL;DR: In this article , a novel colorimetric and ratiometric NIR fluorescent probe for Hg2+ was designed and synthesized based on a coumarin-benzopyrylium platform.
Journal ArticleDOI
A novel coumarin-benzopyrylium based near-infrared fluorescent probe for Hg2+ and its practical applications.
Hongshui Lv,Haiyan Sun +1 more
TL;DR: In this article, a colorimetric and ratiometric NIR fluorescent probe for Hg2+ was designed and synthesized based on a coumarin-benzopyrylium platform.
References
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Long-range corrected hybrid density functionals with damped atom–atom dispersion corrections
Jeng-Da Chai,Martin Head-Gordon +1 more
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Journal Article
Long-Range Corrected Hybrid Density Functionals with Damped Atom-Atom Dispersion Corrections
TL;DR: Chai and Head-Gordon as discussed by the authors proposed a long-range corrected (LC) hybrid density functional with Damped Atom-Atom Dispersion corrections, which is called ωB97X-D.
Journal ArticleDOI
Dietary reference intakes: vitamin A, vitamin K, arsenic, boron, chromium, copper, iodine, iron, manganese, molybdenum, nickel, silicon, vanadium, and zinc.
TL;DR: The DRIs represent the new approach adopted by the Food and Nutrition Board to providing quantitative estimates of nutrient intakes for use in a variety of settings, replacing and expanding on the past 50 years of periodic updates and revisions of the Recommended Dietary Allowances.
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Systematic optimization of long-range corrected hybrid density functionals.
Jeng-Da Chai,Martin Head-Gordon +1 more
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