AXIALLY SUBSTITUTED PHTHALOCYANINE SULFONAMIDES AS LIGHT-ABSORBING COMPOUNDS IN THE DATA LAYER OF OPTICAL DATA CARRIERS

摘要

Disclosed are optical data carriers, which are writable and readable with blue light having a wavelength ranging from 360 to 460 nm. The data layer contains at least one axially substituted phthalocyanine sulfonamide of formula (I), wherein M represents a trivalent or tetravalent metal atom, R¹ and R² independently represent hydrogen, alkyl, cycloalkyl, alkenyl, aralkyl, aryl, or hetaryl, or R¹ and R² form a hydrogenated, partially hydrogenated, quasi aromatic, or aromatic ring, preferably a five-membered to seven-membered ring, along with the N atom to which the same are bound, R³ represents hydrogen, alkyl, cycloalkyl, alkenyl, aralkyl, aryl, or hetaryl, R⁴ represents hydroxy, halogen, alkyl, cycloalkyl, alkoxy, monoalkylamino or dialkylamino, aralkyl, aryl, hetaryl, arylazo, hetarylazo, cyano, nitro, or alkoxycarbonyl, A represents oxygen or sulfur, m represents a number from 1 to 4, n represents a number from 0 to 3, m+n represents a number from 1 to 4, x represents 1 if a trivalent metal atom is used while representing 2 if a tetravalent metal atom is used, y represents a number from 0 to 4, and Kat represents hydrogen, lithium cation, sodium cation, potassium cation, ammonium cation, tetrabutylammonium cation, tetrapropylammonium cation, tetraethylammonium cation, tetramethylammonium cation.