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Lung-chang Liu

Ming-Chia Lee

Andrew Teh Hu

Chung-Chun Lee

Tsai-Wie Tseng

Jun-Rong Chen

Herng-Dar Hwu

This invention provides a novel process for preparing soluble phthalocyanines by microwave irradiation in the absence of any organic solvent. Three different starting materials, i.e. t-butylphthalic anhydride, t-butyl phthalonitrile and metal-free H Pc (tetra-t-butylphthalocyanine) have been adopted, respectively. The starting material with proper metal compound, such as chloride or acetate were irradiated in a commercial microwave oven for a period of 1 to 30 minutes at a power of 200&tilde;900 W. This process is noted to reduce drastically reaction time of MPc formation from 8&tilde;24 hours to 10&tilde;30 minutes due to its unique heating by microwave irradiation. Sandwiched type MPc (such as Lu Pc ) can be produced only through metal replacement from metal-free phthalocyanine by microwave irradiation.

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Hsinchu, Taiwan

Lung-chang Liu