摘要:

We report and discuss Raman spectra of porphin. These were obtained by resonance effect, irradiating in the electronic band IV. Unexpected variations of vibrational band intensities and depolarization ratios were recorded on changing the excitation wavelength. Some implications on the symmetry types of the vibrations are discussed. Results are compared with current data from quasi-linear electronic spectra.

ISSN:0038-7010    

DOI:10.1080/00387017408067229

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

In the system Al(NO3)3- NaF - H20, 19FNMR was used to findIthe existence of AlF2+and AlF+2with chemical shifts of 587.5 and 587.0 p.p.m. in relation to F2. Fluorine ion exchange between these two forms impeded identification of certain signals in the spectrum. Matwiyoff and Wageman2recorded the simultaneous presence of three signals in the I9FNMR spectrum and assigned them to three forms of aluminum: AlF2+, AlF+2and AlF3. Squilibrium constants were calculated for the reaction

ISSN:0038-7010    

DOI:10.1080/00387017408067230

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

Hanle technique is used for the lifetime measurement of the atomic excited states. Field dependent Hanle signal is Lorentzian under ideal conditions. Any departure from ideal situation reflects in the shape of the Hanle signal resulting in erroneous lifetime. One such factor and the elimination of its effect has been discussed here.

ISSN:0038-7010    

DOI:10.1080/00387017408067231

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

A transformer discharge through SeO2vapor under flowing conditions gives rise to the known C-X system of SeO2in the region 4000–5500 A. About sixty bands, including 38 new bands are measured and analysed. Including these new bands a fresh analysis is made, which differs in certain respects from the analysis reported earlier and yields the following frequencies for the upper and lower electronic states involved in the transition:

ISSN:0038-7010    

DOI:10.1080/00387017408067232

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

摘要:

The method of fitting the electronegativity potential energy function to the experimental potential energy curves (R. K. R. V.-curves) has been employed to compute the dissociation energy of MgF. The result thus obtained has been compared with earlier results and the validity of the relation, for this molecule, has been discussed with special reference to rather marked peculiarity in a class of those molecules, one of whose constituent atoms has1SOas its ground state.

ISSN:0038-7010    

DOI:10.1080/00387017408067233

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor

ISSN:0038-7010    

DOI:10.1080/00387017408067228

出版商:Taylor & Francis Group    

年代:1974

数据来源: Taylor