Resonance Raman Spectra of Cu-tetrapyridinoporphyrazine

1974 ◽  
Vol 52 (16) ◽  
pp. 2851-2856 ◽  
Author(s):  
S. Sunder ◽  
H. J. Bernstein
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Point Group ◽  
Exciting Radiation ◽  
Group Symmetry ◽  
Point Group Symmetry ◽  
Symmetry Species ◽  
Dilute Aqueous Solutions ◽  
Resonance Raman Spectra ◽  
Anomalous Polarization

Resonance Raman spectra of dilute aqueous solutions of Cu-tetrapyridinoporphyrazine have been obtained using a tunable dye and Ar+ lasers. Six bands in the spectra have anomalous depolarization ratios. This is the first observation of anomalous polarization in a molecule of C4h point group symmetry. Intensities and depolarization ratio, ρ1, of the observed bands are measured as a function of the wavelength of the exciting radiation. Bands are assigned to different symmetry species on the basis of the dispersion of their ρl values.

Resonance Raman spectra

1979 ◽  
Vol 293 (1402) ◽  
pp. 287-302 ◽  
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Point Group ◽  
Group Symmetry ◽  
Normal Coordinate ◽  
Bond Lengths ◽  
Bending Force ◽  
Resonance Raman Spectra ◽  
Haem Proteins ◽  
Coordinate Treatment

Selection rules for resonance Raman spectra are given for several porphins of D 4h point group symmetry. A normal coordinate treatment is presented, based on a potential function for which stretching and bending force constants are related to bond lengths, and to the product of the bond lengths of the bonds defining the bending angle, respectively. The results can be correlated with the persistent frequencies observed in the resonance Raman spectra of haem proteins where the haem is an iron octasubstituted porphin.

Vibrational spectra of metal-nitro complexes. II. Substituted halo complexes of platinum(IV)

1973 ◽  
Vol 26 (7) ◽  
pp. 1413 ◽  
Author(s):  
MJ Nolan ◽  
DW James
Keyword(s):  
Raman Spectra ◽  
Point Group ◽  
Factor Group ◽  
Group Symmetry ◽  
Infrared And Raman Spectra ◽  
Point Group Symmetry ◽  
Nitro Complexes ◽  
Site Group ◽  
Group Symmetries ◽  
Complex Ion

The infrared and Raman spectra of compounds forming the series given by [Pt(NO2)6-nCln]2- (n = 0-5) together with some of the analogous bromo and iodo compounds have been obtained. Most compounds were studied in the solid state, but the Raman spectra of solutions of some of the compounds were also obtained. The spectra were interpreted initially by considering the likely point group symmetry of the complex ion. Where details of the crystal structures were known, the site group and factor group symmetries were also considered.

Anomalous polarization in the resonance Raman spectra of acetylene-cumulene dehydro annulenes

1980 ◽  
Vol 9 (1) ◽  
pp. 14-17 ◽  
Author(s):  
Etsuko Fujimoto ◽  
Nobuaki Yoshimizu ◽  
Shiro Maeda ◽  
Masahiko Iyoda ◽  
Masazumi Nakagawa
Keyword(s):  
Raman Spectra ◽  
Resonance Raman ◽  
Resonance Raman Spectra ◽  
Anomalous Polarization

Raman-Spektren von SnJ4, GeJ4, TiBr4 und TiJ4 in flüssiger und kristalliner Phase / Raman Spectra of SnJ4, GeJ4, TiBr4, and TiJ4 in the Liquid and Crystalline Phase

1970 ◽  
Vol 25 (12) ◽  
pp. 1374-1381 ◽  
Author(s):  
W. Kiefer ◽  
H. W. Schrötter
Keyword(s):  
Raman Spectra ◽  
Ruby Laser ◽  
Detection System ◽  
Point Group ◽  
Visible Region ◽  
Group Symmetry ◽  
Pure Liquid ◽  
Electronic Detection ◽  
Polarization Studies ◽  
First Time

The Raman spectra of four molecules absorbing in the visible region (SnJ4, GeJ4, TiBr4, and TiJ4) are presented. They were excited with a quasi-continuous ruby laser and recorded with a special electronic detection system. Except for TiJ4, complete Raman spectra of crystal powder pellets could be obtained for the first time. The assignment reported by previous authors was confirmed by accurate polarization studies of solutions or pure liquid. The assignment is also in the solid state possible on the basis of Td point group symmetry. The fundamental vibrations of TiJ4 in solutions are: ν1 (A1) =162, ν2 (E) =51, ν3 (F2) =319 and ν4 (F2) Y = 67 cm-1

scholarly journals Low-temperature resonance-Raman spectra of Japanese-lacquer-tree (Rhus vernicifera) laccase, type-2-copper-depleted laccase and H2O2-treated type-2-copper-depleted laccase

1983 ◽  
Vol 213 (2) ◽  
pp. 503-506 ◽  
Author(s):  
G Musci ◽  
A Desideri ◽  
L Morpurgo ◽  
A Garnier-Suillerot ◽  
L Tosi
Keyword(s):  
Raman Spectra ◽  
Strong Dependence ◽  
Resonance Raman ◽  
Local Symmetry ◽  
Structural Rearrangements ◽  
Blue Copper ◽  
Copper Site ◽  
Resonance Raman Spectra ◽  
Rhus Vernicifera

Resonance-Raman spectra of Japanese-lacquer-tree (Rhus vernicifera) laccase, type-2-copper-depleted laccase and the latter form treated with H2O2 were measured in liquid and frozen solution, on excitation into the 600 nm absorption band. Significant changes in intensity and/or frequency of the bands lying in the 370-430 cm-1 region were observed on freezing, indicating local structural rearrangements taking place at the blue copper site. These findings corroborate previous suggestions based on e.p.r. measurements and redox data [Morpurgo, Calabrese, Desideri & Rotilio (1981) Biochem. J. 193, 639-642]. They show the strong dependence of the physical properties of blue copper centres on local symmetry. Some conclusions on the origin of the Raman bands are also drawn.

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