Results 251 to 260 of about 16,957 (295)

Static and dynamic quenching of luminescent species in polymer media

Journal of Fluorescence, 1994
A method developed for quantitative determination of static and dynamic contributions to luminescence quenching is applied to Ru(II) complexes in polymer matrices (silica gel and polystyrene), quenched by oxygen. This method is based on both intensity and lifetime quenching experiments.
P, Hartmann, M J, Leiner, M E, Lippitsch
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Evidence for Static Quenching of MLCT Excited States by Iodide

Inorganic Chemistry, 2005
The metal-to-ligand charge-transfer (MLCT) excited states of Ru(deeb)(bpy)(2)(PF(6))(2) [where bpy is 2,2-bipyridine and deeb is 4,4'-(CO(2)CH(2)CH(3))(2)-2,2'-bipyridine] in acetonitrile or dichloromethane were found to be quenched by iodide at room temperature. The ionic strength dependence of the optical spectra gave evidence for ion pairing. Iodide
Christopher C, Clark, Andras, Marton, Gerald J, Meyer   +2 more
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Rotamer-specific fluorescence quenching in tyrosinamide: Dynamic and static interactions

Journal of Fluorescence, 1991
We have examined the environments of the three phenol rotamers about the C(α)-C(β) bond in tyrosinamide by fluorescence quenching. Steady-state acrylamide quenching yields a nonlinear stern-Volmer plot. With three distinct emitting species and no other information about the system, it is impossible to analyze the data due to the number of variables ...
P B, Contino, W R, Laws
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Static solitary wave solution in 1D quantum quenched systems

Physics Letters A, 1985
Abstract We use Morita's formulation to describe quenched systems. Through the Holstein-Primakoff (HP) representation we quantize the system in 1D and it gives coupled non-linear Schrodinger equations. We show that a static solitary wave is a solution of these equations.
C.E. Cordeiro, M.T. Thomaz
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Static Recrystallization Behavior of Non-Quenched and Tempered Steel 38MnSiVS

Materials Science Forum, 2020
Refinement and uniform austenite grains are essential to obtain excellent and homogenous properties for non-quenched and tempered steel, which is mainly affected by static recrystallization of the rolling process. Using the Gleeble-3500 thermal simulation test machine, 20% compression test was carried out for two passes at 850~1050 °C (interval of 50 ...
Yun Fei Cao, Wei Yu, Huan Yang, Wen Gao Chang, Zeng Qiang Man   +4 more
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Static and dynamic quenching of protein fluorescence. I. Bovine serum albumin

Biopolymers, 1975
AbstractThe fluorescence parameters, lifetime, relative quantum yield, maximum and mean wavelength, half‐width, and polarization, of bovine serum albumin (BSA) were measured at 15°C in aqueous solutions containing varying concentrations of different chemical perturbants, glycerol, Cu2+ ions, guanidine hydrochloride, and urea. By considering a quenching
I, Feldman, D, Young, R, McGuire
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Effects of static quenching and light pulse intensity on the time-dependent fluorescence quenching kinetics

Chemical Physics, 1994
Abstract By employing the general kinetic theory proposed recently for treating the diffusion-influenced fluorescence quenching, we investigate the nonequilibrium dynamic effect of the complex formation reaction between the ground state fluorophor and quencher molecules on the time-resolved fluorescence decay curve.
Jaeyoung Sung, Kook Joe Shin, Sangyoub Lee   +2 more
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Static and Dynamic Bimolecular Fluorescence Quenching of Porphyrin Dendrimers in Solution

Journal of Fluorescence, 2008
The fluorescence quenching kinetics of two porphyrin dendrimer series (GnTPPH(2) and GnPZn) by different type of quenchers is reported. The microenvironment surrounding the core in GnPZn was probing by core-quencher interactions using benzimidazole. The dependence of quencher binding constant (K ( a )) on generation indicates the presence of a weak ...
Mauricio S, Matos, Johan, Hofkens, Marcelo H, Gehlen   +2 more
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Static critical phenomena in ferromagnets with quenched disorder

Journal of Magnetism and Magnetic Materials, 1985
A critical review of the experimental data reported to date on the critical behaviour near the ferromagnetic-paramagnetic phase transition in amorphous ferromagnetic alloys is presented. Extensive magnetization measurements have been performed on several metallic glasses over a fairly wide temperature range around TC (Curie temperature) which embraces ...
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Coordination Polymer Nanoarchitecture for Nitroaromatic Sensing by Static Quenching Mechanism

The Journal of Physical Chemistry C, 2015
A nanoscale coordination-polymer (CP) architecture with a π-conjugated backbone (Zn-ata) was synthesized in this work. In aqueous media, this material exhibited a specific fluorescence response to nitroaromatics (detection limits of 0.2–1.3 ppm) but not to nitroaliphatics, despite their similar electron affinities.
Yue Li, Kun Liu, Wen-Juan Li, An Guo, Fang-Yao Zhao, Huan Liu, Wen-Juan Ruan   +6 more
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