Optical properties of metal phthalocyanines

Priyanka Singh, N. M. Ravindra

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


In this study, optical properties of phthalocyanines of five metals, i.e., cobalt, nickel, iron, copper, and manganese, have been discussed in the energy (E) range of 1.5-4.1 eV. Utilizing the available data of refractive index (n) and extinction coefficient (k) of these materials in the literature, the related optical properties such as the real (e1), imaginary (e2) parts of the complex dielectric constant (e), and reflectivity (R) are calculated. Interpretations for the energies corresponding to the peaks in e2 are explained in terms of the Penn gap (EP). High-frequency dielectric constant (e?) values corresponding to four models, i.e., the conventional Lorentz model, modified Lorentz model, relaxed Lorentz model, and the dual Lorentz model are used to determine EP. It is found that the EP values corresponding to the conventional and dual Lorentz models are in good agreement with the average of energy peaks in the R-E and the e2-E spectra. The oscillator energy (E0) and the dispersion energy (Ed) of these materials have been determined utilizing the Wemple-DiDomenico model. The calculated values of (a) E0 are generally in good agreement with the Penn gap EP, the average of the energy peaks in the R-E and the e2-E spectra and (b) Ed are comparable to those in the literature for CoPc and NiPc.

Original languageEnglish (US)
Pages (from-to)4013-4020
Number of pages8
JournalJournal of Materials Science
Issue number15
StatePublished - Aug 2010

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Ceramics and Composites
  • Mechanical Engineering
  • Polymers and Plastics
  • General Materials Science
  • Materials Science (miscellaneous)


Dive into the research topics of 'Optical properties of metal phthalocyanines'. Together they form a unique fingerprint.

Cite this