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Wisely Designed Phthalocyanine Derivative for Convenient Molecular Fabrication on a Substrate
Wataru Harada1, Mana Hirahara1, Takanari Togashi1
1Department of Material and Biological Chemistry, Faculty of Science, Yamagata University , 1-4-12 Kojirakawa-machi, Yamagata 990-8560, Japan.
Abstract:
An axial-substituted silicon phthalocyanine derivative, SiPc(OR)2 (R = C4H9), that is soluble in organic solvent is conveniently synthesized. This silicon phthalocyanine derivative reacts with a hydroxyl group on a substrate and then with another phthalocyanine derivative under mild conditions. The accumulation number of the phthalocyanine molecules on the substrates is easily controlled by the immersion time. On the basis of AFM (atomic force microscopy) images, the surface of the phthalocyanine-modified glass substrate has uneven structures on the nanometer scale. ITO electrodes modified with the composition of the phthalocyanine derivative and PCBM show stable cathodic photocurrent generation upon light irradiation.
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