Browse Prior Art Database

METAL-FREE PHTHALOCYANINE COM-FLEXES, METHOD OF PREPARATION AND PHTHALOCYANINE PURIFICATION PROCESS

IP.com Disclosure Number: IPCOM000024098D
Original Publication Date: 1979-Oct-31
Included in the Prior Art Database: 2004-Apr-02
Document File: 2 page(s) / 226K

Publishing Venue

Xerox Disclosure Journal

Abstract

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.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 72% of the total text.

Page 1 of 2

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

C44HN806K2

and phthalocyanine crown ethers of the empirical formula

C65H73O12N8K2.

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...