Optische Speichermedien mit hoher Kapazität, die Xanthenfarbstoffe enthalten

摘要

An optical recording medium has a substrate, a reflecting layer and a recording layer, consisting of xanthene dye(s) of formula (I): R1, R2, R6, R7 = 1-20 C alkyl, 2-20 C alkenyl or 2-20 C alkynyl, optionally mono- or poly-substituted by halogen, 1-8 C alkoxy, 1-8 C alkylthio, nitro (NO2), cyano (CN), amino NR12R13, -COO<->, COOH, COO-(1-8 C alkyl)-, SO3<->, SO3H or SO3-(1-8 C alkyl); or 7-18 C aralkyl or 6-14 C aryl, optionally mono- or poly-substituted by 1-8 C alkyl, 1-8 C alkoxy, 1-8 C alkylthio, halogen, NO2, CN, NR12R13, SO3<->, SO3R12, SO2NR12R13, COO<->, COOR12, CONR12R13, PO3<->, PO(OR12)(OR13) or SiR14R15R16 or one of R1 and R2 and one of R6 and R7 = hydrogen (H); or R1 + R2 and R6 + R7 in pairs or, if they contain positions that can be substituted, may be linked through a direct bond or -O- or -NR12- bridge forming a 5-6-membered heterocycle with N<+>; R3, R4, R5, R8, R9, R10 = H; halogen; OR17; SR17; NO2; NR18R19; or 1-20 C alkyl, 2-20 C alkenyl, 2-20 C alkynyl or 7-18 C aralkyl, optionally mono- or poly-substituted by halogen, 1-8 C alkoxy, 1-8 C alkylthio, NO2, CN or NR18R19; R1 + R3, R2 + R4, R6 + R8 and R7 + R9 in pairs or, if both contain position(s) that can be substituted, may be linked through a direct bond or -O- or -NR20- bridge to form a 5-6-membered heterocycle with the C-C=N<+>, C=C-N or C-C-N group; or R4 + R5 or R9 + R10 together = 1,4-buta-1,3-dienylene, optionally mono- or poly-substituted by 1-8 C alkyl, 1-8 C alkoxy, 1-8 C alkylthio, halogen, NO2, CN, NR18R19, SO3<->, SO3R17, SO2NR18R19, COO<->, COOR17, CONR18R19, PO3<->, PO(OR18)(OR19) or SiR21R22R23, optionally completing a 6-membered aromatic ring with the C=C group; R11 = H; (CH2)kCOO<->; (CH2)kCOOR24; 1-20 C alkyl; 2-20 C alkenyl; 2-20 C alkynyl; or 7-18 C aralkyl or 6-14 C aryl, optionally mono- or poly-substituted by halogen, NO2, CN, NR24R25, SO3<->, SO3R24, SO2NR24R25, COO<->, (CH2)kOR24, (CH2)kOCOR24, COOR24,CONR24R25, OR24, SR24, PO3<->, PO(OR24))(OR25) or SiR21R22R23; R12, R13, R17, R18, R19, R20, R24, R25 = H; 1-20 C alkyl; 2-20 C alkenyl; 2-20 C alkynyl; 7-18 C aralkyl; or 6-14 C aryl optionally mono- or poly-substituted by 1-8 C alkyl, 1-8 C alkoxy, 1-8 C alkylthio, halogen, NO2, CN, NH2, NHR21, NR21R22, SO3<->, SO3R23, SO2NH2, SO2NHR21, SO2NR21R22, COO<->, COOR23, CONH2, CONHR21, CONR21R22, PO3<->, PO(OR21)(OR22) or SiR14R15R16; or NR12R13, NR18R19, NR21R22 or NR24R25 = a 5-6-membered heterocycle, optionally containing another N or O atom, which may be mono- or poly-substituted by 1-8 C alkyl; R14, R15, R16, R21, R22, R23 = 1-20 C alkyl, 2-20 C alkenyl, 2-20 C alkynyl or 7-18 C aralkyl; Y = inorganic, organic and/or organometallic anion(s); Z = a proton and/or metal, ammonium and/or phosphonium cation(s); k = 1-10; m, n, o = 1, 2 or 3; p, q = 0-4 in such ratios, depending on the charge of the relevant sub-structures, that (I) has no excess positive or negative charge.