Pressure-induced d–π charge transfer in one-dimensional phthalocyanine conductors, NiPc(AsF6)0.5 and CoPc(AsF6)0.5
- 8 September 1995
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 103 (10) , 3950-3959
- https://doi.org/10.1063/1.469582
Abstract
Pressure dependence of optical absorption spectra were measured for (phthalocyaninato)‐nickel hexafluoroarsenate, NiPc(AsF6)0.5 and (phthalocyaninato)‐cobalt hexafluororarsenate, CoPc(AsF6)0.5. We found a charge transfer from the central metal ion to the macrocycle at 0.5 GPa in NiPc(AsF6)0.5 and 1.1 GPa in CoPc(AsF6)0.5. According to the electron‐filling process in the π‐conduction band, a metal–insulator transition and an evolution of the energy gap was observed in NiPc(AsF6)0.5. On the other hand, nonmetallic CoPc(AsF6)0.5 showed a continuous change.Keywords
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