ISSN:0377-0486    

DOI:10.1002/jrs.1250060102

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractRaman spectra of various samples, excited by an YAG:Nd‐Laser at 1,06 μm, were recorded by three detection systems. A comparison was made of the detectivity of the infrared‐Raman system against a visible Raman system working at 0,647

ISSN:0377-0486    

DOI:10.1002/jrs.1250060103

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe weaker spectral features in the Raman spectra of MN3(M = K, Rb, Cs) in the region 1240–1360 cm−1are reported. The present study indicates that the two‐phonon modes involving ν2can be analysed solely in terms of k = 0 selection rules whilst the two‐ and three‐phonon bands involving internal and external combination modes require a critical point analysis. There are several possible assignments of a multiphonon band of the latter type; its appearance apparently depends on proximity to an intense fundamental mode, from which it presumably steals

ISSN:0377-0486    

DOI:10.1002/jrs.1250060104

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe pure rotational Raman spectrum of acetylene has been recorded with argon laser excitation and a resolution of about 0.3 cm−1. For the first time ΔJ = 1 transitions in the excited II states are clearly resolved up toJ= 9. Formulae for the intensity distribution in rotational Raman spectra of linear molecules in the ground and vibrational II states have been derived including the effect ofI‐type doubling. After a qualitative discussion these formulae are applied to a quantitative analysis of the acetylene spec

ISSN:0377-0486    

DOI:10.1002/jrs.1250060105

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractPolarized infrared and Raman spectra of K2[RuCl5NO] and (NH4)2[RuCl5NO] have been obtained and a precise assignment of the four RuCl stretching modes has been made. The lower frequency vibration is unambiguously assigned to the axial RuCl stretch in agreement with previous findings based on substitution of the axial (transto the NO group) halogen ligand. The results are discussed in terms of Mössbauer data and population anal

ISSN:0377-0486    

DOI:10.1002/jrs.1250060106

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractPolarized Raman spectra of single crystals of La2(SO4)3, 9H2O and La2(SO4)3, 9D2O have been recorded at room temperature and assignments to the zero wave vector modes proposed. Analysis of the spectra shows the non‐individuality of ions and molecules involved in these crystals and the existence of hydrogen bonds of various lengths. The systemiatc temperature study of Raman spectra shows a singularity in the variation of band intensities in the 273–283 K region which confirms the existence of a phase transition at this temperat

ISSN:0377-0486    

DOI:10.1002/jrs.1250060107

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractPhosphate frequencies for eight nucleoside 3′,5′‐ and four nucleoside 2′, 3′‐cyclic monophosphates have been determined by Raman and infrared spectroscopy based on comparisons with modified cyclic nucleotides and model cyclic phosphates. To a first approximation the symmetric diester stretching frequency, νs(OPO), is determined by the OPO bond angle. However, substitution on the phosphate ring also affects the frequency and intensity of νs(OPO). These results are discussed in terms of the use of νs(OPO) to determine the degree of backbone order in p

ISSN:0377-0486    

DOI:10.1002/jrs.1250060108

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe absolute intensities of the 802 cm−1Raman line of liquid cyclohexane at 514.5 and 337.1 nm excitations were determined by applying the local field correction theory to corresponding absolute intensities of cyclohexane vapour. By using this Raman line as an external intensity standard, the absolute Raman intensities of the 992 cm−1line of benzene and the 666 and 762 cm−1lines of chloroform were measured in the liquid phase. The gaseous absolute intensities were also measured for some molecules including benzene and chloroform and comparisons between the gas and liquid phase Raman intensities were

ISSN:0377-0486    

DOI:10.1002/jrs.1250060109

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractSeveral rotation‐vibrational bands of gaseous allene‐1,1‐d2have been studied by Raman spectroscopy and a number of molecular constants are obtained including the ground state constantsA0 B̄0= 2.9520 ± 0.0019 cm−1andDK= (3.3 ± 0.6) × 105cm−1. A reassignment of the CD‐stretching vibrations ν5

ISSN:0377-0486    

DOI:10.1002/jrs.1250060110

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY

摘要:

AbstractThe theory of interference effects between preresonance scattering from an intense electronic transition and resonance scattering from a forbidden electronic transition is formulated. A simple closed formula for the cross‐section of a totaliy‐symmetrical fundamental line is derived for the case where the vibrational structure of both electronic transitions is smeared out. This formula reproduces very well recently obtained experimental excitation profiles in such complex compiunds as tris (ethylenediamine) cobalt (III) chloride and tetrabromopalladate

ISSN:0377-0486    

DOI:10.1002/jrs.1250060111

出版商:John Wiley&Sons, Ltd.    

年代:1977

数据来源: WILEY