Methods for inserting silicon into phthalocyanines and naphthalocyanines
US5872248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Mar 28, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B47/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A simple, flexible, convenient method for making silicon phthalocyanines and naphthalocyanines by inserting silicon into metal-free phthalocyanines and metal-free naphthalocyanines is provided. The method comprises: providing a metal-free phthalocyanine or metal-free naphthalocyanine; reacting the metal-free phthalocyanine or metal-free naphthalocyanine with HSiCl.sub.3 to provide a reaction product; then reacting the reaction product with water; and extracting a silicon phthalocyanine or a silicon naphthalocyanine. The invention also relates to novel phthalocyanines and naphthalocyanines. The phthalocyanines and naphthalocyanines are useful as photosensitizers and as dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.