abstract |
A metal substituted non-centrosymmetrical phthalocyanine is provided, which is selected from 2-[(4-sulphonate)phenoxy]-9,10,16,17,23, 24-esa[3--(dimethylamino)phenoxy]zinc(II)phthalocyanine; 2-[(4-sulphonate)phenoxy]-9, 10,16,17,23,24-esa[3-(trimethylammonium)phenoxy]zinc(II)phthalocyanine esaiodide, and phthalocyanines of formula (I): (see formula I). |