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Highly efficient detection of hydrogen peroxide in solution and in the vapor phase via fluorescence quenching

24-Mar-2015 | Patrick Marks; Bhasker Radaram; Mindy Levine; Igor A Levitsky, Chemical Communication, 2015

Herein we report the highly efficient and sensitive detection of hydrogen peroxide in both aqueous solution and in the vapor phase via fluorescence quenching (turn-off mechanism) of the amplified fluorescent conjugated polymer-titanium complex induced by hydrogen peroxide. Inter- and ...

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Development of Highly Thermoresponsive Fluorescence Sensor Consisting of Plasmonic Silver Nanoprisms and Poly(N-isopropylacrylamide)-Fluorophore Composites

23-Mar-2015 | Kosuke Sugawa; Ryutaro Ichikawa; Naoto Takeshima; Yoshimasa Tanoue; Joe Otsuki, Photochemical & Photobiological Sciences, 2015

We developed a new hybrid consisting of Ag nanoprisms, poly(N-isopropylacrylamide) (PNIPAm), and fluorophores via layer-by-layer assembly. The fluorescence intensity below the lower critical solution temperature (LCST) of PNIPAm was 6.4 times stronger than that above the LCST, meaning that the ...

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A simple pincer-type chemosensor for reversible fluorescence turn-on detection of zinc ion at physiological pH range

23-Mar-2015 | Qi Lin; Yi Cai; Qiao Li; Jing Chang; Hong Yao; You-Ming Zhang; Tai-Bao Wei, New Journal of Chemistry, 2015

A new highly selective and sensitive pincer-type chemosensor Y for zinc ion with turn–on fluorescence behavior in physiological pH range solution was developed. Y is based on bi-hydrazone derivatives which contain pyridine as fluorescent groups and hydrazone bond as a recognition site. The ...

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Water‐soluble polymeric chemosensor for selective detection of Hg2+ in aqueous solution using rhodamine‐based modified poly(acrylamide–acrylic acid)

23-Mar-2015 | Tong‐Mou Geng, Da‐Yu Wu, Luminescence, 2015

Abstract We report the fabrication of a novel easily available turn‐on fluorescent water‐soluble polymeric chemosensor for Hg2+ ions that was simply prepared by micellar free radical polymerization of a water‐insoluble organic rhodamine‐based Hg2+‐recognizing monomer (GR6GH), with hydrophilic ...

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Aggregation Features and Fluorescence of Hoechst 33258

20-Mar-2015 | Natalia Busto; Beatriz Cano; Rocío Tejido; Tarita Biver; José M. Leal; Marcella Venturini; Fernando Secco; Begoña García, Journal of Physical Chemistry B, 2015

The functionality of the bisbenzimide Hoechst 33258 in solution has been largely exploited in the quantification of DNA. Understanding of its behavior is essential to promote its widespread application and learning of biological processes. A detailed study of the dimerization process of the ...

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Aggregation-Controlled Excimer Emission in an Axial Anthracene-Sn(IV)Porphyrin-Anthracene Triad in Solid and Solution Phases

19-Mar-2015 | Soumyajit Dey; Pritam Mondal; Sankar Prasad Rath, New Journal of Chemistry, 2015

Synthesis and structure of a multichromophore triad consist of two anthracene units axially bound to a Sn(IV)porphyrin centre via carboxylate functionality has been reported in which two anthracene moieties of two neighboring molecules generate 1D polymeric chain. The fluorescence intensity of ...

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Ultrafast Excited-State Deactivation of 8-Hydroxy-2′-deoxyguanosine Studied by Femtosecond Fluorescence Spectroscopy and Quantum-Chemical Calculations

18-Mar-2015 | Pascale Changenet-Barret; Thomas Gustavsson; Roberto Improta; Dimitra Markovitsi, Journal of Physical Chemistry A, 2015

The fluorescence properties of the 8-hydroxy-2′-deoxyguanosine (8-oxo-dG) in aqueous solution at pH 6.5 are studied by steady-state spectroscopy and femtosecond fluorescence up-conversion and compared with those of 2′-deoxyguanine (dG) and 2′-deoxyguanine monophosphate (dGMP). The steady-state ...

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Selective colorimetric and “turn-on” fluorimetric detection of cyanide using an acylhydrazone sensor in aqueous media

17-Mar-2015 | JingHan Hu; JianBin Li; Jing Qi; You Sun, New Journal of Chemistry, 2015

A simple cyanide selective colorimetric and fluorimetric chemosensor L was designed and synthesized, which showed both a colorimetric and a fluorescence turn-on response for cyanide ions in aqueous solution with specific selectivity and high sensitivity. The probe shows an immediate visible ...

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Phenothiazine–aminothiourea–Hg(II) ensemble-based fluorescence turn-on toward iodide in aqueous media and imaging application in live cells

15-Mar-2015 | Author(s): Wenge Yang , Shouhai Yang , Qirun Guo , Tuan Zhang , Keyi Wu , Yonghong Hu, Sensors and Actuators B: Chemical, 2015

Publication date: 5 July 2015 Source:Sensors and Actuators B: Chemical, Volume 213 Author(s): Wenge Yang , Shouhai Yang , Qirun Guo , Tuan Zhang , Keyi Wu , Yonghong Hu A phenothiazine–aminothiourea-based open chemosensor (P1) has been designed and synthesized, which exhibits high ...

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Synthesis, Electronic Properties and WOLED Devices of Planar Phosphorus‐Containing Polycyclic Aromatic Hydrocarbons

11-Mar-2015 | François Riobé, Rózsa Szűcs, Pierre‐Antoine Bouit, Denis Tondelier, Bernard Geffroy, Fátima Aparicio, Julia Buendía, ..., Chemistry - A European Journal, 2015

Abstract We describe the synthesis and the physical properties of polyaromatic hydrocarbons (PAHs) containing a phosphorus atom at the edge. In particular, the impact of the successive addition of aromatic rings on the electronic properties was investigated by experimental (UV/Vis absorption, ...

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