Optical absorption and emission spectral studies of phthalocyanine molecules in DMF

Optical absorption and emission spectral studies of various phthalocyanine (Pc) molecules in dimethyl formamide (DMF) solvent are reported in this pap er. Measurements have been done for free base, Eu, Fe, Mn, Sm, Cu, Zn, Nd a nd La Pc-s. The principal optical transitions viz B and Q are identified an d some of the important spectral parameters such as molar extinction coeffi cient (epsilon), absorption cross section (sigma (a),), dipole strength (q) and oscillator strength (f) are evaluated for the prominent Q-band. The me asured radiative parameters viz emission cross section (sigma (e)), fluores cence bandwidth (Delta lambda) and optical gain (G) show wide variation amo ng different systems. The results obtained are compared with other solid ma trices such as glass and polymer. Copyright (C) 2001 John Wiley & Sons, Ltd .