INTRAZEOLITIC SYNTHESIS OF COPPER PHTHALOCYANINE AND OTHER LARGE COLORED MOLECULES
Original Publication Date: 1977-Oct-31
Included in the Prior Art Database: 2004-Mar-30
Xerox Disclosure Journal
It is disclosed herein that copper (II) phthalocyanine can be synthesized within the cavities of the porous, crystalline a1umino-silicates zeolite X or Y. These materials have a highly regular cubic struct-ire consisting of a three dimen5 sional network of about 13 A spherical voids linked by 8-9A channels. Partial aluminum substitution for silicon in the SiOA tetrahedra which makes up the framework leaves these net-worRs with a negative charge which is balanced by free sodium ions. In the system disclosed herein, some of the sodium ions are replaced by copper (II) ions and the zeolite is dehydrated and exposed to phthalonitrile vapor. It is known that "guest" molecules in a transition metal ion exchanged zeolite can com-plex these ions and it is proposed that phthalonitrile will interact with the zeolite Cu (II) ions to form a square planar complex which should then readily undergo further reaction to form copper (II) phthalocyanine, just as phthalonitrile in the presence of Cu (II) Cl2 gives almost quantitative yields of Cu (II) phthalocyanine.