SILVER(II) TETRANEOPENTOXYPHTHALOCYANINE AND ITS REDOX CHEMISTRY

The synthesis and characterization of the title complex is described. This new silver(II) phthalocyanine is soluble in most organic solvents, rendering it suitable for extended study. The complex can be oxidized electrochemically to a silver(III) phthalocyanine that is also indefinitely stable. Further oxidation is possible to the silver(III) phthalocyanine cation radical, also showing substantial stability. Reduction to a silver(I) phthalocyanine leads to demetalation on the electrochemical time scale. In support of this electrochemical study, the electrochemistry of metal-free tetraneopentoxyphthalocyanine is also reported. Both silver(II) and metal-free tetraneopentoxyphthalocyanine are extensively aggregated in solution. The FTIR spectrum of the title complex is compared with the spectra of the corresponding cobalt(II), copper(II), and zinc species. The electronic spectra of the several silver species are reported. When diluted with metal-free tetraneopentoxyphthalocyanine, silver(II) tetraneopentoxyphthalocyanine yields a highly resolved electron spin resonance spectrum. Spin-Hamiltonian parameters are reported. © 1990, American Chemical Society. All rights reserved.