scholarly journals The ESR Spectrum of a π Cation Radical Trapped in a Single Crystal of Chloro(tetraphenylporphyrinato)cobalt(III)

1983 ◽  
Vol 56 (3) ◽  
pp. 822-826 ◽  
Author(s):  
Masahiro Kohno ◽  
Hiroaki Ohya-Nishiguchi ◽  
Kiyoko Yamamoto ◽  
Tosio Sakurai
Keyword(s):  
Single Crystal ◽  
Cation Radical ◽  
Esr Spectrum

Environment Effects on the ESR Spectrum of the Cation Radical of Dimethylketene in Low Temperature Matrices

1985 ◽  
Vol 58 (4) ◽  
pp. 1267-1272 ◽  
Author(s):  
Jun Fujisawa ◽  
Shin Sato ◽  
Kazuo Shimokoshi ◽  
Tadamasa Shida
Keyword(s):  
Low Temperature ◽  
Cation Radical ◽  
Esr Spectrum ◽  
Environment Effects

TEMPERATURE DEPENDENCES OF Y2Cu2O5 ESR SPECTRA

1989 ◽  
Vol 03 (05) ◽  
pp. 427-435 ◽  
Author(s):  
A.A. GIPPIUS ◽  
V.V. MOSHCHALKOV ◽  
YU. A. KOKSHAROV ◽  
A.N. TIKHONOV ◽  
B.V. MILL ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Single Crystal ◽  
Room Temperature ◽  
Esr Spectra ◽  
Single Line ◽  
Néel Temperature ◽  
Esr Spectrum ◽  
Complicated Form ◽  
Temperature Dependences ◽  
G Factors

Temperature dependences of the ESR spectrum in Y 2 Cu 2 O 5 compound are studied for both polycrystalline and single crystal samples. The g-factors along the main axes are found to be ga=2.099, gb=2.048, and gc=2.21 at room temperature, T=293 K . As temperature decreases, the linewidth ΔH increases in agreement with the Huber’s formula ΔH=A(T N /(T−T N ))β+B(θ/T+1) with the following parameters: A=1513±10 Oe , B=509±10 Oe , T N =7±1 K , θ=18±2 K , β=1.3±0.3. In the vicinity of the Neel Temperature, T N , the ESR spectrum has a very complicated form indicating the existence of clusters with different internal magnetic fields. Below T N , a single line symmetrical ESR spectrum is recovered.

Triplet ESR spectrum of the copper porphyrin cation radical

1982 ◽  
Vol 104 (7) ◽  
pp. 2057-2059 ◽  
Author(s):  
S. Konishi ◽  
M. Hoshino ◽  
M. Imamura
Keyword(s):  
Cation Radical ◽  
Esr Spectrum ◽  
Copper Porphyrin ◽  
Porphyrin Cation

ESR spectrum of Mn(.eta.-C4H6)2PMe3 in a single crystal of Fe(.eta.-C4H6)2PMe3

1984 ◽  
Vol 3 (2) ◽  
pp. 238-240 ◽  
Author(s):  
J. M. McCall ◽  
J. R. Morton ◽  
K. F. Preston
Keyword(s):  
Single Crystal ◽  
Esr Spectrum

Low field ESR spectrum of trivalent gadolinium in single crystal throrium oxide

1968 ◽  
Vol 28 (4) ◽  
pp. 258-259 ◽  
Author(s):  
S.A. Marshall ◽  
G.A. Johnson
Keyword(s):  
Single Crystal ◽  
Esr Spectrum ◽  
Low Field

Cation Radical in a Single Crystal of α‐Aminoisobutyric Acid Irradiated by γ Rays at 77°K

1972 ◽  
Vol 56 (5) ◽  
pp. 2481-2482 ◽  
Author(s):  
Atsuko Minegishi ◽  
Yoshiharu Shinozaki ◽  
Gisuke Meshitsuka
Keyword(s):  
Single Crystal ◽  
Cation Radical ◽  
Aminoisobutyric Acid ◽  
Γ Rays

scholarly journals Conformational distortions of π-cation radical (β-oxoporphyrin)copper(II) derivatives: [Cu(2,7,12-trioxoOEHP·)][SbCl6] and [Cu(2,7-dioxoOEiBC·)][SbCl6]

2011 ◽  
Vol 15 (05n06) ◽  
pp. 373-381 ◽  
Author(s):  
Ilona Turowska-Tyrk ◽  
Seong-Joo Kang ◽  
W. Robert Scheidt
Keyword(s):  
Solid State ◽  
Single Crystal ◽  
Cation Radical ◽  
X Ray ◽  
Near Ir ◽  
Derivatives Of

The preparation and characterization of two π-cation radical derivatives of copper β-oxoporphyrins is described. [3,3,8,8,13,13,17,18-octaethyl-(3H,8H,13H)-porphine-2,7,12-trionato (2-)] copper π-cation radical, [ Cu (2,7,12-trioxoOEHP·)]+, and [3,3,8,8,12,13,17,18-octaethyl-(3H,8H)-porphine-2,7-dionato(2-)] copper π-cation radical, [ Cu (2,7-dioxoOEiBC·)]+, have been prepared and characterized by single-crystal X-ray determinations, UV/vis/NIR, and IR spectroscopies. Both molecules have modest distortion from the planarity and show monomeric units in the solid state. [ Cu (2,7-dioxoOEiBC·)]+ shows a concentration dependent near-IR band at 1410 nm.

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