Results 311 to 320 of about 129,958 (357)

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
and Andras Marton, Christopher C. Clark, Gerald J. Meyer   +2 more
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Static and dynamic quenching of protein fluorescence. II. Lysozyme

Biopolymers, 1975
AbstractThe fluorescence parameters—lifetime, relative quantum yield, wavelength of maximum fluorescence intensity, half‐width, and polarization—of 0.01% lysozyme were measured at 15°C in aqueous solution, in glycerol–water mixtures (0–90% v/v glycerol), in aqueous urea (0–8M) solutions, and in aqueous guanidine hydrochloride (0–6.4M) solutions.
Robert McGuire, Isaac Feldman
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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 ...
S. N. Kaul, S. N. Kaul
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Static and dynamic fluorescence quenching of carbazole by tropanic alkaloids

Journal of Photochemistry and Photobiology A: Chemistry, 1992
Abstract Steady state fluorescence quenching of carbazole by tropanic derivatives in cyclohexane and acetonitrile was performed. The results obtained using cyclohexane as solvent support the existence of two species in equilibrium: free and hydrogen-bonded complexed carbazole in both the ground and excited states.
J.M. Alvarez, E.M. Talavera, B. Quintero
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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 ...
Paul Brian Contino, William R. Laws
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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.
Sangyoub Lee, Kook Joe Shin, Jaeyoung Sung   +2 more
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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 ...
Wei Yu, Wen Gao Chang, Zeng Qiang Man, Huan Yang, Yun Fei Cao   +4 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, Marcelo Henrique Gehlen, Johan Hofkens   +2 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
Robert McGuire, Isaac Feldman, Dolores Young   +2 more
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Static and dynamic model for 4-aminodiphenyl fluorescence quenching by carbontetrachloride in hexane

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2004
The fluorescence quenching of 4-aminodiphenyl (4ADP) with chloromethanes (CH2Cl2, CHCl3 and CCl4) have been studied in solvents of different polarity and viscosity. The quenching rate constants (kq) have been determined in all solvents. For CCl4 and CHCl3 quenching, the kq depends on solvent viscosity whereas for CH2Cl2, the kq values show a mixed ...
Meenakshisundaram Swaminathan, N. Radha
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