Photosensitization reactions of neodymium, dysprosium and lutetium diphthalocyanine
摘要:
Photolysis, using a visible radiation, of diphthalocyanine complexes of Nd-III, Dy-III and Lu-III ([Pc(-2>(NdPc)-Pc-III(-2)](-), [Pc(-2)(DyPc)-Pc-III(-2)](-) and [Pc(-2)(LuPc)-Pc-III(-2)](-), respectively) in the presence of pentachlorophenol (PCP) or SO2 results in the one-electron oxidation of the diphthalocyanine species to Pc(-1)(NdPc)-Pc-III(-2), Pc(-1)(DyPc)-Pc-III(-2) and Pc(-2)(LuPc)-Pc-III(-2), respectively. The PCP is reductively dechlorinated to tetra- and trichlorophenols. The quantum yields for the photosensitization reactions are of the order 10(-4). (C) 1997 Elsevier Science Ltd.
Abstract The electronic absorption spectra of samarium and neodymium phthalocyanines in DMSO and entrapped in glasses obtained via the sol-gel technique have been obtained. Decrease in concentration of metallophtalocyanines in DMSO leads to observed changes in the relative intensifies of the two bands in the Q-band region. This behavior could be explained by the shifts in equilibrium between the LnPc