Abstract: In this paper, copper(Ⅱ)·tetra-4-(2-methoxyethanoxy-carbonyl) phthalocyanine (A) and copper(Ⅱ)-tetra 4-(2-butoxyethanoxy carbonyl) phthalocyanine (B) were synthesized and characterized by elemental analysis, FT-IR, ¹H NMR and ESR. UV-vis spectra indicate that most of them are dimeric compounds in CHCl₃ solution. X-ray diffraction patterns of the powder samples showed that the stacking arrangments of the molecules are inter-parallel in the tilted way. Presence of organic substituents in phthalocyanine ring somewhat lowers its thermostability. Surface(π)-area(A) isotherms for both compounds in CHCl₃ solution onto subphase(water) at 20℃ showed the existence of the obvious interchange among the "gas", "liquid","solid" phases and both compounds could form a better monomolecular layer film.

Key words: phthalocyanine-copper(Ⅲ) derivative, synthesis, thermogravimetry, π-A isotherm, monomolecular layer film