ZfN: Search Results

1	Author	Horst Kunkely, AmD. Vogler	Requires cookie*
	Title	Photoreactivity of Titanocene Pentasulfide
	Abstract	The electronic spectrum o f Cp2TiSs shows a long-wavelength absorption at Am ax = 492 nm which is assigned to the lowest-energy S52~ ^ T i IV ligand-to-metal charge transfer (L M C T) transition. The photolysis o f the complex in C H 2CI2 leads to the formation o f Cp2T iC l2 and elemental sulfur. It is suggested that L M C T excitation initiates a reductive elimination with the extrusion o f S5 while the reduced titanocene is reoxidized by the solvent.
	Reference	Z. Naturforsch. 53b, 224—226 (1998); received December 12 1997
	Published	1998
	Keywords	Charge Transfer, Titanium Complexes, Sulfide Complexes, Photochemistry
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0224.pdf
	Identifier	ZNB-1998-53b-0224
	Volume	53

2	Author	Horst Kunkely, Arad Vogler	Requires cookie*
	Title	Photooxidation of Dicyanoaurate(I) Induced by Metal-to-Ligand Charge Transfer Excitation
	Abstract	The irradiation of [Au(CN)2]_ in oxygen-saturated acetonitrile leads to photooxidation of Au(I). In the presence of additional chloride [AutCN^CL]-is formed with < /> = 0 .5 x 1 0 -4 at Ajrr = 2 5 4 nm. It is assumed that [Au(CN)2]~ in its metal-to-ligand charge transfer state undergoes an excited state electron transfer to oxygen in the primary photochemical step.
	Reference	Z. Naturforsch. 53b, 853—855 (1998); received April 12 1998
	Published	1998
	Keywords	Photochemistry, Charge Transfer, Gold Complexes, Cyanide Complexes
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-0853.pdf
	Identifier	ZNB-1998-53b-0853
	Volume	53

3	Author	Horst Kunkely, Arnd Vogler	Requires cookie*
	Title	Photochemical Reductive Elimination of Nitrogen from Triazidogallium(III). Generation of Luminescent Gallium(I)
	Abstract	The irradiation of Ga(N3)3 in CH3CN leads to a reductive elimination of nitrogen according to the equation Gam(N3)3 —► Ga*N3 + 3N2 (0 = 0.002 at Ain = 254 nm). Ga+ in CH3CN is characterized by its absorption (Amax = 298 nm) and emission (Amax = 475 nm) spectrum.
	Reference	Z. Naturforsch. 53b, 1180—1182 (1998); received July 9 1998
	Published	1998
	Keywords	Photochemistry, Charge Transfer, Gallium Complexes, Azide Complexes
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	TEI-XML for	default:Reihe_B/53/ZNB-1998-53b-1180.pdf
	Identifier	ZNB-1998-53b-1180
	Volume	53

4	Author	M. Jánossy, P. Mezei	Requires cookie*
	Title	Excitation of the 210 nm Zn II Line in a Hollow Cathode He-Ne-Zn Discharge
	Abstract	In a hollow cathode He-Zn discharge it was observed that addition of Ne stops laser oscillation at the 492.4 nm Zn II line and increases significantly the spontaneous intensity at the 210 nm Zn II line, which originates from the 4d 2 D 5/2 lower level of the laser transition. Based on a rate equation model, the cross-section of the Ne ion-Zn atom charge transfer collisions populating the 4d 2 D 5/2 level was determined. The cross-section 3.5x 10 -15 cm 2 found by us is in acceptable agreement with the value 2.3x 10" 15 cm 2 reported in the literature. This high cross-section together with existing lower level depopulation points to the possibility of obtaining laser oscillation at 210 nm in a Ne-Zn discharge.
	Reference	Z. Naturforsch. 53a, 955—959 (1998); received April 6 1998
	Published	1998
	Keywords	Gas Lasers, Laser Excitation, Charge Transfer, Glow Discharges, Sputtering
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	TEI-XML for	default:Reihe_A/53/ZNA-1998-53a-0955.pdf
	Identifier	ZNA-1998-53a-0955
	Volume	53