摘要:

AbstractThe complex PtCI3(9‐methyladeninium) has been prepared in acidic media and its laser Raman spectrum has been recorded. The spectrum shows small but interesting changes in the vibrations of 9‐methyladenine upon platinum complexation. A comparison of the laser Raman spectra of the free and protonated 9‐methyladenine with that of the complex indicates that platinum coordlnation at N‐7 produces small shift and important perturhathfons of the band intensities of the parine ring vibrations. This result is in agreement with the crystal structure data, which show small local electronic effects when platinum coordinates

ISSN:0377-0486    

DOI:10.1002/jrs.1250060302

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe Raman spectra of 80 ethers have been recorded and the characteristic frequencies are reported. Correlations between frequencies and structure have been investigated. The collected data have been incorporated into the interpretation system for carbonhydorgen and hydroxy compounds; the different ways of handling are discussed.

ISSN:0377-0486    

DOI:10.1002/jrs.1250060303

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe resonance Raman spectra of aqueous solutions of the diettylcyanine ion are recorded from 100–4000 cm−1using all the exciting lines of an Ar+laser and the 6328 Å line of a HeNe laser. Experimental results, intensities and depolarization ratios, are discussed using Albrecht's theory. The calculated and experimental intensity laws obtained for some normal modes are analysed. An assignment of all the Raman bands is proposed, based upon comparison with infrared spectra and the results of a normal modes calcu

ISSN:0377-0486    

DOI:10.1002/jrs.1250060304

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe temperature dependence of the one phonon Raman spectra of ZnS (hex.), ZnO and a‐Sic crystals is studied over the temperature range 15 to 1000 K. For ZnS frequency shifts are calculated by Griineisen theory and thek= 0 longitudinal and transverse optic phonon Griineisen parameters determined. The results are compa, indicating that the principal interactions are the cubic anharmonicities. Various calculated properties include the area, second moment, and simulated Raman bands to illustrate the anharmonic behaviour in the solid

ISSN:0377-0486    

DOI:10.1002/jrs.1250060305

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractTemperature dependence of Raman spectra was measured for polycrystalline [Ni(NH3)6](ClO4)2and [Ni(ND3)6](ClO4)2. Spectroscopic evidence for the phase transition at 173 K was obtained. The phase transition is evident in the splitting of some bands corresponding to the internal ClO −4ion vibrations and in charactreistic intensity dependences of the bands. Some bands also showed a characteristic broadening with increasing temperature, which we interpret as being connected with stochastic reorientations of NH3groups and ClO −4ions. Two bands which were not resolved from the others at the room temperature study1were now evidenced at low tempe

ISSN:0377-0486    

DOI:10.1002/jrs.1250060306

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractAn investigation has been carried out on the correlation between intermolecular interactions and absolute Raman intensities of lattice modes. The analysis was performed by comparing absolute Raman intensities (measured using crystalline powders) with it could be shown that, in geoerd, the oriented‐gas model is inadequate for the description of the properties of molecular crystals. Large discrepancies in the model could be revealed for modes with both librational and translational character. The discrepancies depend strongly on the intermolecular interaction

ISSN:0377-0486    

DOI:10.1002/jrs.1250060307

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractChlorine dioxide dissolved in inert solvents [CCl4and CFCl3(Freon ll)] has been investigated by means of u.v./visual‐absorption spectroscopy and Raman‐spectroscopy. The vibrational constants for the2B1, ground state and the2A2excited state have been redetermined. While the ground state constants are in good agreement with gas state data, the excited state constants differ considerably from previous data. The Raman excitation profile is given for thev1fundamental and its first harmonic in the region of excitation from 6471 Å to 4579 Å. Dispersion of the depolarization ratio (ρ = 0.16(6471 Å); ρ = 0.23(4765 Å))shows the contribution of two electronic state to the polarizability tensor. Expermental evidence is given that the decomposition of ClO2in solution is not sensitive to visl

ISSN:0377-0486    

DOI:10.1002/jrs.1250060308

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractIn this paper, the resonance Raman spectrum of ClO2in solution, which cannot be quantitatively interpreted within the usual approximations, is described using a Morse function for the nuclear potentials in the lower and upper states. The absorptionspectrum and the Raman excitation profiles are calculated and compared with the experimental results. The study of the depolarization ratio show, a result which cannot be obtained by consideration of the relative intensities.

ISSN:0377-0486    

DOI:10.1002/jrs.1250060309

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe absolute Raman intensities of the fundamental bands of vapour HCCl3Jand DCCl3have been measured with an experimental accuracy of ten per cent. The vibrational potential function for chloroform has been calculated by a standard least squares forceconstant refinement including data on anharmonicity corrected values of the12C/13C displacements and also the absolute intensities measured in this work. The results are compared with those of Previous works and the influence of the intensity data upon the refinement is discussed.

ISSN:0377-0486    

DOI:10.1002/jrs.1250060310

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractRaman and infrared spectra of crystalline1,2,3,4,5‐tetrachloro‐ and tetrabromobenzenes have been analysed between 10 and 100 cm−1over a range of temperature from 10 K to 400 K. An assignment of lattice modes is given. The first‐order phase transition is of a displacive type as shown by the behaviour of librational modes. The small value of the estimated β critical exponent in the νT/ν0= (Tc− T/Tc)β experession is interperted in terms of predominant short‐range interactions in these mol

ISSN:0377-0486    

DOI:10.1002/jrs.1250060311

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY