A Vibrational Analysis of the Fluorescence of Naphthalene Vapor

The fluorescence spectrum of naphthalene vapor has been photographed and found, under suitable conditions, to consist of a number of discrete bands. Thirty‐nine bands were measured and a vibrational analysis was carried out making use of assignments of infrared and Raman fundamentals. The analysis indicates that the transition observed is forbidden by symmetry and made weakly allowed by a molecular vibration of frequency 478 cm−1 belonging to the representation b2u. This indicates that the wave function of the lowest excited singlet state of naphthalene belongs to the irreducible representation Ag or B1g of the point group D2h.

[1]  A. L. McClellan,et al.  The Infrared Spectra of Naphthalene Crystals, Vapor, and Solutions , 1952 .

[2]  J. Platt.  Experimental Determination of Even‐Odd Character of Excited Electronic States of Molecules with a Center of Symmetry , 1951 .

[3]  G. M. Barrow,et al.  The Thermodynamic Properties of Naphthalene , 1951 .

[4]  J. Jacobs.  Excited Electronic Levels in Conjugated Molecules - III: Energy-States of Naphthalene , 1949 .

[5]  M. Kasha,et al.  The Metastability of the Lowest Excited Singlet Level of Naphthalene , 1949 .

[6]  John R. Platt,et al.  Classification of Spectra of Cata-Condensed Hydrocarbons , 1949 .

[7]  James H. Schulman,et al.  Fluorescence and Phosphorescence , 1949 .

[8]  W. Simpson.  Electronic States of Organic Molecules , 1948 .

[9]  M. Kasha.  Transmission filters for the ultraviolet. , 1948, Journal of the Optical Society of America.

[10]  C. Coulson.  Excited Electronic Levels in Conjugated Molecules: I. Long Wavelength Ultra-Violet Absorption of Naphthalene, Anthracene and Homologs , 1948 .

[11]  W. West.  PRIMARY PROCESSES IN FLUORESCENCE AND PHOTOSENSITIZATION, WITH PARTICULAR REFERENCE TO SIMPLE AROMATIC COMPOUNDS , 1941 .

[12]  W. V. Mayneord,et al.  The ultra-violet absorption spectra of some complex aromatic hydrocarbons-I , 1935, Proceedings of the Royal Society of London. Series A - Mathematical and Physical Sciences.

[13]  V. Henri,et al.  The Analysis of the Absorption Spectrum of Naphthalene Vapour. Structure and Activation of the Molecule of Naphthalene , 1924 .