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Optical absorption and emission spectral studies of phthalocyanine molecules in DMF

✍ Scribed by G. A. Kumar; J. Thomas; N. V. Unnikrishnan; V. P. N. Nampoori; C. P. G. Vallabhan

Publisher: John Wiley and Sons
Year: 2001
Tongue: English
Weight: 89 KB
Volume: 05
Category: Article
ISSN: 1088-4246
DOI: 10.1002/jpp.339

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✦ Synopsis

Optical absorption and emission spectral studies of various phthalocyanine ( Pc ) molecules in dimethyl formamide (DMF) solvent are reported in this paper. Measurements have been done for free base, Eu , Fe , Mn , Sm , Cu , Zn , Nd and La Pc - s . The principal optical transitions viz B and Q are identified and some of the important spectral parameters such as molar extinction coefficient (ε), absorption cross section (σ~a~), dipole strength (q) and oscillator strength (f) are evaluated for the prominent Q-band. The measured radiative parameters viz emission cross section (σ~e~), fluorescence bandwidth (Δλ) and optical gain (G) show wide variation among different systems. The results obtained are compared with other solid matrices such as glass and polymer.

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