摘要:

AbstractIodine vapor was suspended in Ar, Kr, Xe and N2matrices at 16K using several dilutions (Ar/I2=400/1, 1000/1, 2500/1) and the Raman spectra were studied using krypton and argon plasma exciting lines. Two progressions were observed in the Ar/I2=400 samples: a weak one beginning at 212±1 cm−1, which has the gas‐phase I2spacing, and extending out to 11ν using 5145 Å excitation, and a very strong series beginning at 180 ± 1 cm−1and extending out to 11ν with vibrational intervals near solid I2values. The two progressions exhibited comparable intensities in the Ar/I2=1000 experiment. In the Ar/I2=2500 experiments, the gas‐phase‐like series was intense and the 180 cm−1interval spectrum was absent. The very strong I2fundamental and regular overtone progressions increased in length and in intensity as the exciting wavelength decreased 6471 to 5145 Å, reaching the absorption band maximum, and then decreased in length and intensity using 4880 and 4579 Å excitation. These observations are characteristic of reson

ISSN:0377-0486    

DOI:10.1002/jrs.1250020502

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY

摘要:

AbstractThe gas phase Raman spectra of normal and perdeutero‐cyclopropane have been recorded at medium resolution. The band contours of theE′ andE″ degenerate modes have been observed and computer simulation of them has allowed determination of the ζizvalues. This analysis was possible for ν9, ν11, ν12, ν13, and ν14 of C3H6and for ν9, ν10, ν11, ν12, ν13, and ν14 of C3D6. The gas phase spectrum of C3D6is reported for the first time and assigned. The agreement between our results and the IR data on theE′ modes is good. Predicted parameters for theE″ modes from force field calculations are also in good agreement with t

ISSN:0377-0486    

DOI:10.1002/jrs.1250020503

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY

摘要:

AbstractRaman spectra of 3, 3‐difluoroxetane have been recorded from 50 to 3500 cm−1in all three physical states. In addition, the infrared spectra of gaseous and solid 3,3‐difluoroxetane have been measured between 200 and 3500 cm−1. A vibrational assignment is presented in terms of the C2νpoint group which is based upon the observed band contours, depolarization ratios, group frequency correlations and relative band intensities. Although transitions associated with the ring‐puckering mode of 3,3‐difluoroxetane were not directly observed, a weak absorption at 1228 cm−1has been assigned to a combination band involving the out‐of‐plane skeletal bending and a CH2wagging mode. With this assignment, the 1 ← 0 transition of ν24 is estimated to be centered near 69 cm−1. The data reported herein will be compared with other studies

ISSN:0377-0486    

DOI:10.1002/jrs.1250020504

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY

摘要:

AbstractRaman scattering from polaritons in organic biaxial crystalm‐dinitrobenzene has been observed by a photographic method. In order to obtain a greater shift of polaritons the directional dispersion of the incident wave vector has been taken into account, so that the polariton disperison curves over the range from 500 cm−1to 3500 cm−1have been obs

ISSN:0377-0486    

DOI:10.1002/jrs.1250020505

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY

摘要:

AbstractResonance Raman (RR) spectra of chlorophyllaandb, and of pheophytinaandbin solution are presented and their main features discussed. Variations of intensities and depolarization ratios of RR bands of the chlorophylls were followed as a function of the excitation wavelength from 441.6 to 514.5. nm. A number of band assignments are proposed. The effect of the state of association on the RR spectra of chlorophyll was studied for some typicalin vitrosystems. These data are discussed in view of their relevancy to the study of chlorophyll associationsin vivo.

ISSN:0377-0486    

DOI:10.1002/jrs.1250020506

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY

摘要:

AbstractThe rigorous resonance Raman effect was observed for the octahedral PtBr 2−6and PtI 2−6ions. The enhancement of the Raman intensity occurred for the totally symmetric ν1 band and for the non‐totally symmetric ν2 band simultaneously in both cases of the two ions. The overtone bands of ν2 appeared in the spectra in addition to the ordinary long overtone progression of the ν2 vibration. The results are discussed in relation to the two closely lying electronic level

ISSN:0377-0486    

DOI:10.1002/jrs.1250020507

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY

摘要:

AbstractThe spectral line shape of hyper‐Raman light scattering in liquids is calculated by the method of irreducible spherical tensors and the theory of rotational Brownian motion. The line broadening due to rotational molecular motion in the liquid is expressed by way of relaxation times τ JMand is found to depend on nonlinear molecular parameters ∣B̃ JM∣2, which are quadratic functions of the derivatives with respect to appropriate normal coordinates of the hyperpolarizability tensor elements b 2ωijk. Tables of ∣B̃ JM∣2are adduced for all vibration symmetries of spherical‐top and symmetric‐top molecules. The tensor elements of scattered light intensity are calculated for linearly and circularly polarized incident light. Investigation of hyper‐Raman spectral line broadening is seen as a source of new data on the dynamics of molecules in the liquid state and on their n

ISSN:0377-0486    

DOI:10.1002/jrs.1250020508

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY

ISSN:0377-0486    

DOI:10.1002/jrs.1250020501

出版商:John Wiley&Sons, Ltd.    

年代:1974

数据来源: WILEY