Anisotropic decay of polarized fluorescence of FAD in water-methanol solutions

2020 ◽  
Author(s):  
Marina Krasnopevtceva ◽  
Victor Belik ◽  
Daria Gorbenko ◽  
Irina Semenova ◽  
Andrey Smolin ◽  
...  
Keyword(s):  
Polarized Fluorescence ◽  
Methanol Solutions

Polarized Fluorescence of Spin-coated Polymeric Thin Films

2007 ◽  
Vol 2 (2) ◽  
pp. 257-264
Author(s):  
Satoko Nishiyama ◽  
Masahiro Tajima ◽  
Yasuhiko Yoshida
Keyword(s):  
Thin Films ◽  
Polarized Fluorescence ◽  
Polymeric Thin Films

Advances in polarized fluorescence depletion measurement of cell membrane protein rotation

1991 ◽  
Author(s):  
B. George Barisas ◽  
N. A. Rahman ◽  
Thomas Londo ◽  
J. R. Herman ◽  
Deborah A. Roess
Keyword(s):  
Cell Membrane ◽  
Membrane Protein ◽  
Polarized Fluorescence ◽  
Cell Membrane Protein

Study of aerobic oxidation of phenyl PtII complexes (dpms)PtIIPh(L) (dpms = di(2-pyridyl)methanesulfonate; L = water, methanol, or aniline)

2009 ◽  
Vol 87 (1) ◽  
pp. 110-120 ◽  
Author(s):  
Julia R Khusnutdinova ◽  
Peter Y Zavalij ◽  
Andrei N Vedernikov
Keyword(s):  
Aqueous Solution ◽  
Aerobic Oxidation ◽  
Reductive Elimination ◽  
High Yield ◽  
Ambient Conditions ◽  
Activation Barriers ◽  
Methanol Solutions ◽  
Anionic Species ◽  
Mechanism Of Oxidation ◽  
Solution Mechanism

Oxidation of phenyl PtII complexes K[(dpms)PtIIPh2], 1, (dpms)PtIIPh(MeOH), 2, (dpms)PtIIPh(OH2), 3, and methyl PtII complex (dpms)PtIIMe(NH2Ph), 6, with O2 in aqueous or methanol solutions under ambient conditions leads to corresponding (dpms)PtIVR(X)OH complexes (R = X = Ph, 7; R = Ph, X = OH, 8; R = Ph, X = OMe, 9; R = Me, X = NHPh; 11; dpms = di(2-pyridyl)methanesulfonate). Complexes 7–9 could be isolated in high yield. Complex 11 as well as its phenyl analogue (dpms)PtIVPh(NHPh)OH, 10 can be prepared in high yield by oxidation of corresponding (dpms)PtIIR(NH2Ph) with H2O2 in methanol. Phenyl PtII complexes (dpms)PtIIPh(HX) derived from HX = aniline and DMSO, 4 and 5, respectively, are inert toward O2. The rate of oxidation of 1–5 with O2 decreases in the order 1 > 3 ~ 2 » 4, and 5 is unreactive. Methyl analogues are significantly more reactive compared with their phenyl counterparts. Proposed mechanism of oxidation with O2 includes formation of anionic species (dpms)PtIIR(X)– responsible for reaction with dioxygen. Attempts at C–O and C–N reductive elimination from phenyl PtIV complexes 7–10 do not lead to phenyl derivatives PhX at 80–100 °C, consistent with the results of the DFT estimates of corresponding activation barriers, ΔG0 exceeding 28 kcal/mol.Key words: platinum phenyl complexes, oxidation, dioxygen, aqueous solution, mechanism.

Structural and Electrical Properties of Mn-Co-Ni-O Thin Films Prepared by Dip-Coating Technique

1992 ◽  
Vol 271 ◽  
Author(s):  
Shoji Kaneko ◽  
Naoto Mazuka ◽  
Tamotsu Yamada
Keyword(s):  
Thin Films ◽  
Spinel Phase ◽  
Dip Coating ◽  
Atomic Ratio ◽  
Heating Process ◽  
Electric Resistance ◽  
Glass Substrates ◽  
Methanol Solutions ◽  
Structural And Electrical Properties ◽  
Dip Coating Technique

ABSTRACTMn-Co-Ni-O thin films of metal atomic ratio 3.0 : 1.9 : 1.0 were prepared on glass substrates from methanol solutions of the corresponding metal β-diketonates by dip-coating. As-prepared films were heated at 900°C for 1 h mostly after being calcined at 450°C for 5 min. The film thickness increased with increasing concentration of the solution as well as the number of lifting times. However, the effect was not apparent with the sample prepared without calcination. The prepared films were observed to crystallize into a complicated spinel phase by the heating process at 900°C for 1 h. The surface of the dense film composed of particles of about 0.2 μm diameter, was almost even. The thermal and aging responses of electric resistance showed the film to be a good material as a thermistor.

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