'MOLECULAR METALS' BASED ON COPPER(II) 2,9,16,23-TETRAHALO SUBSTITUTED PHTHALOCYANINE DERIVATIVES

摘要

Pure copper(I1) 2,9,1 6,23-symmetricallytetrahalo substituted phthalocyanine complexes, CuPTX(where X F, Cl, Br and I) were synthesized. Elementalanalyses, electronic, IR, magnetic susceptibilitymeasurements, ESR, X-ray diffraction and TGA studieswere carried out on the above complexes both before andafter iodine doping, to characterize and investigatethe effect of substituents as well as the iodine dopingon the electrical properties of the copperphthalocyanine complexes. Variations in the electricalconductivity of the complexes depend on the nature ofthe substituents and were found to show ~10~5 timesimproved electrical conductivity in comparison to theparent phthalocyanine. It is interesting to note thatsubstitution and iodine doping showed remarkablyincreased electrical conductivity, nearly 10~12 timesthe electrical conductivity of copper phthalocyanine.This may be due to a decrease in the metal-metal bonddistance, increase in the approach of an ideal eclipsedsystem or due to the combined effects of both.