ISSN:0377-0486    

DOI:10.1002/jrs.1250170102

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractThe classical theory of radiation was able to explain satisfactorily the relationship between the dispersion of refraction and coherent light scattering. However, in the 1920s the old quantum theory encountered difficulties in explaining these phenomena and these were only fully overcome 20 years later.

ISSN:0377-0486    

DOI:10.1002/jrs.1250170103

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

ISSN:0377-0486    

DOI:10.1002/jrs.1250170104

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractRaman spectra of benzoic acid, sodium benzoate and complexes of lanthanides with benzoic acid, of general formula Ln(Obz)3(Ln = lanthanum, neodymium, terbium, dysprosium or lutetium; OBz= benzoic acid radical) were recorded. The Raman bands of lanthanide benzoates were interpreted on the basis of the Raman and IR spectra. Analysis of benzene ring vibrations, active in the Raman and IR spectra, and electronic transitions in the UV and visible spectra provided information on the effect of metal coordination on the aromatic system of benzoic acid.

ISSN:0377-0486    

DOI:10.1002/jrs.1250170105

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractThe medium‐resolution Raman spectrum of benzoic acid vapour has been recorded. Comparison of the high‐frequency spectrum with the internal spectra of substituted and similar molecules indicates that previous assignments of the spectra should be revised. Three possible explanations are proposed for the broad feature observed at very low frequencies. Two of them lead to the conclusion that there is a very low barrier for hindered rotation around the CC bond connecting the carboxylic group with the phenyl

ISSN:0377-0486    

DOI:10.1002/jrs.1250170106

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractThe region of OH and OD stretching vibrations in the Raman spectrum of liquid H2O and D2O was investigated by analysing the isotropic and anisotropic components of the bands. The constants for inter‐ and intra‐molecular and Fermi coupling were estimated and the positions of all components calculated. The intermolecular coupling appears to be stronger than intramolecular coupling in liquid wa

ISSN:0377-0486    

DOI:10.1002/jrs.1250170107

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractThe effect of various electron acceptor molecules on the intensities of the ν1ν12Raman bands of pyridine has been studied quantitatively; the changes in the Raman tensor invariants have been evaluated and are discusse

ISSN:0377-0486    

DOI:10.1002/jrs.1250170108

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractThe rotational Raman spectra of C2D4, C2HD3and CH2CD2are presented with a resolution ofca0.3 cm−1. A computer simulation has been carried out to reproduce the observed contours from literature values of the rotational constants. The molecular polarizability parameters are determined withca10% uncertainty by transfer of the C2H4literature values. The assignment of theJsub‐band heads is sh

ISSN:0377-0486    

DOI:10.1002/jrs.1250170109

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractThe influence of high electrostatic fields on Raman scattering has been studied. For fields approaching 108V m−1in polymers a contribution to the Raman intensity due to the non‐linearity of the Raman polarizability could be demonstrated. These results are in agreement with theoretical considerations. The band position does not change within the achieved resolution of 0.1 cm−1for fields up to 1.7 × 108V m−1, as also expected from theoretical estimates. With pulsed fields of duration<1 μs, field strengths exceeding the static breakdown strength could be applied. In this case, however, a very complex pre‐breakdown behaviour was observed, influencing the Raman scattering in a manner not yet

ISSN:0377-0486    

DOI:10.1002/jrs.1250170110

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY

摘要:

AbstractRaman excitation profiles (REPs) for bands of carotenoid and chlorophyll b (Chl b) from whole cells of green algae at low temperatures are presented. In addition to preventing thermal destruction of the samples during long‐term irradiation, the use of a double channel surface scanning technique allowed the recording of the Raman spectrum of a non‐resonating substance such as acetone suitable as an intensity reference at the same time. The measured REPs are compared with the absorption spectrum of whole cells at low temperatu

ISSN:0377-0486    

DOI:10.1002/jrs.1250170111

出版商:John Wiley&Sons, Ltd.    

年代:1986

数据来源: WILEY