摘要:

The natural abundance carbon-13 nuclear magnetic resonance spectrum of xylocaine was obtained using the pulse Fourier transform technique. The various carbon resonances in the proton noise decoupled spectrum of xylocaine have been assigned on the basis of chemical shift theory, multiplicity observed in SFORD spectrum, signal intensity, relaxation time and comparison with the structurally related compounds.

ISSN:0038-7010    

DOI:10.1080/00387017908069135

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

A normal coordinate analysis is performed for the trigonal PMo9O34model (symmetry C3v), treated as a fragment of the tetrahedral PMo12O403−ion. The calculated vibrational frequencies are reported.

ISSN:0038-7010    

DOI:10.1080/00387017908069136

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

A delayed émission from excited 1-Naphthyl-N-methyl carbamate solutions in isopropanol in the temperature range 130 to 255K has been identified as P-type delayed fluorescence (DF) resulting from a diffusion controlled triplet-triplet annihilation process. The supporting evidence includes the expected temperature behaviour of the emission intensities, dependence of the DF intensity on the square of the incident exciting light intensity, and a DF lifetime which is somewhat less than one half the phosphorescent lifetime in the same sample, at each temperature. DF was not observed from solid solutions. No evidence was found for prompt or delayed excimer emission even at high solute concentrations, at any temperature.

ISSN:0038-7010    

DOI:10.1080/00387017908069137

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

Vibrational spectra of α-P2W18O626−and of the two isomers α1and α2-P2W17O6110−are reported and discussed by comparison with those of PW12O403−. With given assumptions, calculations of force constants for the PO4tetrahedra are carried out. The location of the holes in the structures of α1and α2-P2W17are inferred from these results.

ISSN:0038-7010    

DOI:10.1080/00387017908069138

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

A series of anthraquinone type dyes were tested for absorption and emission spectra, quantum yield, and emission and calculated lifetime. An analysis was made on the possible effects of substituents on these properties and their relationship to molecular configuration in the excited and ground states. Although the analysis is incomplete, it parallels work of a similar nature recently published.

ISSN:0038-7010    

DOI:10.1080/00387017908069139

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

A normal coordinate analysis for cyclopropenone is performed. The final force field is used to calculate the potential energy distribution. Mean amplitudes of vibration and perpendicular amplitude correction coefficients are reported for the first time for this molecule. The mean amplitudes in the ring are compared with those of cyclopropene. The differences are compatible with the idea of conjugation of the two double bonds in cyclopropenone.

ISSN:0038-7010    

DOI:10.1080/00387017908069140

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

In order to connect the anomalies of reactivity and the physicochemical phenomena of discontinuity of diazolic-1,3 compounds to a structural variation, we have made a study of methyl-1 alkylthio (alkyl, benzyl)-2 imidazoles through mag-

ISSN:0038-7010    

DOI:10.1080/00387017908069141

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0038-7010    

DOI:10.1080/00387017908069134

出版商:Taylor & Francis Group    

年代:1979

数据来源: Taylor