METAL-FREE PHTHALOCYANINE COM-FLEXES, METHOD OF PREPARATION AND PHTHALOCYANINE PURIFICATION PROCESS
Original Publication Date: 1979-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Xerox Disclosure Journal
Disclosed are novel phthalocyanine compositions such as dipotassium phthalo-cyanine bis diglyme of the empirical formula C44H44N806K2 and phthalocyanine crown ethers of the empirical formula C65H73O12N8K2.
XEROX DISCLOSURE JOURNAL
METAL-~FREEPHTHALOCYANINE COM- Proposed Classification FLEXES, METHOD OF PREPARATION U.S. Cl. 96/1
AND PHTHALOCYANINE PURIFICATION mt. Cl. G03g PROCESS
W. H. H, Gunther
Disclosed are novel phthalocyanine compositions such as dipotassium phthalo-
cyanine bis diglyme of the empirical formula
and phthalocyanine crown ethers of the empirical formula
Examples of these materials include dipotassium phthalocyanine-bis-diglyme, dipotassium phthalocyanine tetraglyme, dipotassium phthalocyanine-bis-(1 8-crown-
6) ether, dipotassium phthalocyanine bis-(15-crown-5) ether, dipotassium phthalo-
cyanine-bis-(12-crown-4) ether and the like. The potassium phthalocyanine diglyme compounds are prepared generally by treating metal-free phthalocyanine with
potassium hydroxide and bis (methoxy ethyl) ether (also referred to as diglyme) in the presence of sufficient water to cause dissolving of the potassium hydroxide.
The strong, aqueous base removes two protons from the metal-free phthalocyanine forming the dianion. Simultaneously, the potassium ion complexes with the diglyme, forming a cationic complex characterized by having two diglyme units
linked to one potassium cation. The phthalocyanine dianion combines with two potassium diglyme cations to form a salt which is soluble in an excess of diglyme. Solubility of the complex potassium diglyme phthalocyanine salt is temperature dependent; that is, there is a higher solubility at elevat...