Highly soluble tetrasubstituted lanthanide bis-phthalocyanines; Synthesis, characterization, electrical properties and aggregation studies

Bilgiçli A. T., Günsel A., Kandaz M., Altındal A., Cömert H.

Journal of Porphyrins and Phthalocyanines, vol.20, no.8-11, pp.1065-1074, 2016 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 20 Issue: 8-11
  • Publication Date: 2016
  • Doi Number: 10.1142/s1088424616500802
  • Journal Name: Journal of Porphyrins and Phthalocyanines
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1065-1074
  • Keywords: aggregation, conductivity, impedance, Lanthanide bis-phthalocyanines, silver and palladium ions
  • Istanbul Technical University Affiliated: Yes


We report the synthesis, characterization and electrical properties of lanthanide metal based bis-phthalocyanines, {M[Pc-(b-HHT)4]2} (HHT:1-hydroxyhexane-3-ylthio){M = Lu3+(2), Eu3+(3), and Yb3+(4)}. The interaction of bis-phthalocyanines with Ag+ and Pd2+ metal ions were investigated by UV-vis spectroscopy and atomic force microscopy. Thin films of bis-phthalocyanine molecules were prepared by spin-coating method. The surface morphology of thin films were performed with Atomic Force Microscopy as further investigate. The electrical transport properties of ITO/Pc/Al devices were investigated. At low voltages all the films showed an ohmic conduction, whereas at higher voltage levels the conduction is dominated by space charged limited conduction with exponential distribution of trapping levels. Measurements of current density as a function of inverse temperature at constant applied voltage yielded a hole mobility values, μp = 2.12 × 10-7, 6.72 × 10-7 and 1.58 × 10-6 m2sn-1.V-1 for lanthanium phthalocyanines. From the analysis of frequency, w, dependence of electrical conductivity, sac. it was found that the sac obeys the power law given by sac = Aws, in which the frequency exponent "s" decreases with temperature.