Visible-light effects on electronic absorption bands of some cation radicals produced by photoionization at 77.deg.K

1972 ◽  
Vol 76 (5) ◽  
pp. 639-641 ◽  
Author(s):  
Katsumi Kimura ◽  
Shunji Katsumata ◽  
Kazutoshi Sawada
Keyword(s):  
Visible Light ◽  
Electronic Absorption ◽  
Absorption Bands ◽  
Cation Radicals ◽  
Light Effects

scholarly journals Visible light effects in plasma plume ignition

2017 ◽  
Vol 24 (4) ◽  
pp. 043502 ◽  
Author(s):  
L. Nie ◽  
Y. Xian ◽  
X. Lu ◽  
K. Ostrikov
Keyword(s):  
Visible Light ◽  
Plasma Plume ◽  
Light Effects

Chlorine Solutions in Molten Alkali Chlorides

2007 ◽  
Vol 62 (3-4) ◽  
pp. 205-212 ◽  
Author(s):  
Artem Kolobov ◽  
Vladimir Khokhlov ◽  
Alexei Potapov ◽  
Victor Kochedykov
Keyword(s):  
Absorption Band ◽  
Molten Salt ◽  
Electronic Absorption ◽  
Absorption Maximum ◽  
Electronic Absorption Spectra ◽  
Absorption Bands ◽  
Short Waves ◽  
Wide Absorption Band ◽  
Alkali Chlorides ◽  
Saturated Solutions

Electronic absorption spectra of gaseous chlorine and their saturated solutions in molten alkali chlorides were studied in wide ranges of temperature and wavelength. It was found that gaseous chlorine has a wide absorption band between 20 000 and 43 500 cm−1. There is a tendency to both widening of the band and shifting of the absorption maximum to the short-waves region with rising temperature.The absorption bands of saturated solutions of chlorine in all molten alkali chlorides show a maximum in the neighborhood of 30 000 cm−1. A good correlation was found between the optical density of molten salt-Cl2 systems and the solubility of chlorine.

Electronic absorption, MCD, and luminescence properties of porphyrin J-aggregates

2013 ◽  
Vol 17 (08n09) ◽  
pp. 703-711 ◽  
Author(s):  
Yuichi Kitagawa ◽  
Junji Hiromoto ◽  
Kazuyuki Ishii
Keyword(s):  
Electronic Absorption ◽  
Magnetic Circular Dichroism ◽  
Protonated Form ◽  
Red Shift ◽  
Energy Splitting ◽  
Absorption Bands ◽  
Exciton Interactions ◽  
J Aggregates ◽  
Fluorescence And Phosphorescence Spectra ◽  
Phosphorescence Spectra

In this paper, we have investigated electronic absorption, magnetic circular dichroism, fluorescence, and phosphorescence spectra for a protonated form of H 2 TPPS 4( H 4 TPPS 4) and the J-aggregates of H 4 TPPS 4. The J-aggregation induces a large red-shift in the B (Soret) and Q absorption bands, while the phosphorescence peaks of H 4 TPPS 4 and its J-aggregates are almost entirely similar. The large red-shift of the B-band is quantitatively explained by the exciton interactions. Thus, the exciton interactions in the J-aggregates are proposed as a useful approach to decrease the energy splitting between the fluorescent and phosphorescent states.

Experimental Determination of Dipole Moments of Some Benzamide Derivatives

1998 ◽  
Vol 53 (8) ◽  
pp. 684-688
Author(s):  
J. Heidt ◽  
J. R. Heidt ◽  
M. Raciniewskab
Keyword(s):  
Excited State ◽  
Experimental Determination ◽  
Gas Phase ◽  
Electronic Absorption ◽  
Dipole Moments ◽  
Absorption Bands ◽  
Excited State Dipole Moments ◽  
Benzamide Derivatives

Abstract The excited state dipole moments of some benzamide derivatives are determined. The method of solvent induced shifts of electronic absorption bands in comparison with their positions in the gas phase is used. Some regular trends revealed in the obtained data are discussed. The present results are compared with those available in the literature.

Spectroelectrochemical Study of some μ3-Oxo-μ-acetato Trinuclear Rhodium(III) and Iridium(III) Complexes

1995 ◽  
Vol 50 (4) ◽  
pp. 551-557 ◽  
Author(s):  
Kenta Takahashi ◽  
Keisuke Umakoshi ◽  
Akihiro Kikuchi ◽  
Yoichi Sasaki ◽  
Masato Tominaga ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Electronic Absorption Spectrum ◽  
Absorption Spectra ◽  
Electronic Absorption ◽  
Electronic Absorption Spectra ◽  
Visible Region ◽  
Absorption Bands ◽  
Visible Absorption ◽  
The One ◽  
Species Being

New trinuclear rhodium(III) complexes, [Rh3(μ3-O)(μ-CH3COO)6(L)3]+ (L = imidazole (Him), 1-methylimidazole (Meim), and 4-methylpyridine (Mepy)) have been prepared. The Him, Meim, and Mepy complexes show reversible one-electron oxidation waves at E1/2 = +1.12, +1.12, and +1.28 V vs Ag/AgCl, respectively, in acetonitrile. Electronic absorption spectra of the one electron oxidized species of these complexes and [Rh3(μ3-O)(μ-CH3COO)6(py)3]+ (py = pyridine) (E1/2 = +1.32 V ) were obtained by spectroelectrochemical techniques. While the Rh3(III,III,III) states show no strong visible absorption, the Rh3(III,III,IV ) species give a band at ca. 700 nm (ε = 3390-5540 mol dm-3 cm-1). [Ir3(μ3-O)(μ-CH3COO)6(py)3]+ with no strong absorption in the visible region, shows two reversible one-electron oxidation waves at +0.68 and +1.86 V in acetonitrile. The electronic absorption spectrum of the one-electron oxidized species (Ir3(III,III,IV )) also shows some absorption bands (688 nm (ε, 5119), 1093 (2325) and 1400 (ca. 1800)). It is suggested that the oxidation removes an electron from the fully occupied anti-bonding orbital based on metal-dπ-μ3-O-pπ interactions, the absorption bands of the (III,III,IV ) species being assigned to transitions to the anti-bonding orbital.

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