摘要:

A demountable hollow cathode has been used to excite molecular benzene. The emission spectrum is shown in Fig. 1. For comparison, the absorption spectrum of molecular benzene is also shown in Fig. 1

ISSN:0038-7010    

DOI:10.1080/00387016808049934

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

We have recently described some thermal emission studies in a separated air-acetylene flame. In the present preliminary communication

ISSN:0038-7010    

DOI:10.1080/00387016808049935

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

New absorption spectra attributed to the SbH and SbH free-radicals have been observed in the flash photolysis of stibine (SbH3).

ISSN:0038-7010    

DOI:10.1080/00387016808049936

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

Dixon et al.1have obtained the absorption spectra of the AsH2and AsH2free-radicals in the flash photolysis of arsine. We have observed the 1-0 and 2-0 bands of the3II(a)-3σ−transition of AsH in addition to the 0-0 band reported by Dixon et al.

ISSN:0038-7010    

DOI:10.1080/00387016808049937

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

Ferguson and Hudes1,2have observed two red-degraded emission band spectra attributed to the free-radical antimony monochloride (SbCl) in the region λ λ4200-5600 by introducing SbCl3vapour into a stream of active nitrogen. No other bands appeared in the range λ2000 to λ7000. We have observed in absorption a group of diffuse violet-degraded bands near 2320Å following the isothermal flash photolysis of SbCl3which we attribute to a new system of SbCl (C←X).

ISSN:0038-7010    

DOI:10.1080/00387016808049938

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

The use of tetramethylrhodamine isothiocyanate isomers R and G in microbiological and immunochemical procedures has prompted interest in their chemical and physical properties. Tetramethylrhodamine isothiocyanate (TMR) isomer R has been found to be more efficacious than isomer G in immunochemical work (1). Hence, the establishment of the structures of the respective isomers of tetramethylrhodamine isothiocyanates (Figure II) would be of value for better understanding the fluorescent staining and immunochemical activities of these reagents.

ISSN:0038-7010    

DOI:10.1080/00387016808049939

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

Cysteinyl radicals have been studied by ESR spectroscopy after generation by irradiation of single crystals1and frozen matrices2. The spectra reported were broad lines, and had been assigned to various radical species with high electron spin density is concentrated in a nonbonding 3p orbital of the sulfur atom, accounted for the basic features3. However, it had not been established whether such spectra also would be produced by cysteinyl radicals when present in solution. As it is probable that cysteinyl radicals nay also be formed, among other species, in certain systems presently under study in this laboratory, it was necessary to determine the spectroscopic characteristics of such free radicals when produced in the liquid phase.

ISSN:0038-7010    

DOI:10.1080/00387016808049940

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

The complex waves of frustrated multiple internal reflectance spectroscopy are described by equations which are derived from Maxwell's field equations. These equations are:andthe equations that mathematically describe the intensity of reflectance are also given. This paper should satisfy many questions that have recently arisen regarding these complex waves.

ISSN:0038-7010    

DOI:10.1080/00387016808049941

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

The most replete Mulliken-Wolfsberg-Helmholtz (M-W-H) MO calculations available to date2suffer from a number of deficiencies. Of these, it is probable that the neglect of “atoms-in-molecules” effects is one of the more crucial. In other words, whereas the diagonal matrix elements Hiiof the M-W-H energy matrix are readily evaluated from atomic ionization data in such a way as to take account of the charge and configuration of the particular atomic center on which the AO i is situate, they do not include any effects due to the neighboring atomic centers. These effects are probably complex-involving, as they must the full complement of electron repulsion and electron-nuclear penetration effects. A discussion of such effects in heteronuclear MXnmolecules has been given in terms of a Madelung potential by Jorgensonet al.3; these authors have shown that such neighbor effects dominate covalent bonding effects when the atoms M and X have significantly different electronegativies. A more replete discussion of this same topic has been given by Corrington and Cusachs4.

ISSN:0038-7010    

DOI:10.1080/00387016808049942

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor

摘要:

The CoIIcomplexes, Co(II)-bissalicylal-3,3′-diimino-di-n-propylamine peroxide I and decaammine-μ-peroxodicobalt cation II, were investigated by the electron spin resonance (esr). On the basis of the observed esr parameters, it was concluded that the unpaired electron is largely localized on the O2group and, therefore, these complexes are better described as super-oxides. The equilibrium in solution of I between the paramagnetic and dia-magnetic forms implied by the previous studies was also demonstrated.

ISSN:0038-7010    

DOI:10.1080/00387016808049943

出版商:Taylor & Francis Group    

年代:1968

数据来源: Taylor