A naphthalocyanine derivative of formula (I):
wherein k, I, m, and n are the same or different and each is zero or an integer of 1 to 4, k + I + m + n being an integer of 1 or more, each group R1 is selected from alkyl, substituted alkyl or aryl and when there is more than one group R1 these may be the same or different; M is Si, Ge or Sn; and the groups Y are the same or different and each is selected from halogen, hydroxy, aryloxy, alkoxy, trialkylsiloxy, triarylsiloxy, trialkoxysiloxy, triaryloxysiloxy, trialkoxysiloxy, triaryloxysiloxy, trityloxy and acyloxy has an excellent ability to absorb diode laser beans and is suitable for use in an optical recording medium.
式(I)的
萘酞菁衍
生物:
其中 k、I、m 和 n 相同或不同,且各自为零或 1 至 4 的整数,k + I + m + n 为 1 或以上的整数,每个基团 R1 选自烷基、取代烷基或芳基,当有多个基团 R1 时,这些基团可以相同或不同;M 为 Si、Ge 或 Sn;基团 Y 相同或不同,且各自选自卤素、羟基、芳氧基、烷氧基、三烷基
硅氧基、三芳基
硅氧基、三烷氧基
硅氧基、三芳氧基
硅氧基、三烷氧基
硅氧基、三芳氧基
硅氧基、三烷氧基
硅氧基、三芳氧基
硅氧基和酰氧基。