Abstract

Micro-tubular structure of tetra(2-isopropyl-5-methylphenoxy) substituted Zn–phthalocyanine (T2) has been obtained in large scale by simple solvent evaporation method. FE-SEM micrographs indicate that most of the micro-tubes are in hollow rectangular shape. XRD measurement demonstrated that the walls of the micro-tubes are arranged in highly ordered nanoscopic structure. Both the XRD measurement and the UV–vis absorption spectrum of the micro-tubes indicated an H-aggregate of the substituted Zn–phthalocyanine molecules (2) in the micro-tubes. Formation mechanism of micro-tube has been proposed. Field-induced surface photovoltage spectrum (EFISPS) inferred that (T2) has p-type character.

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