Naphthalocyanine derivatives, production thereof, optical recording medium using the same, and production thereof.

摘要

A naphthalocyanine derivative of formula (I): wherein the groups R<1> are the same or different and each is a group -(CR<2>R<3>)xSiR<4>R<5>R<6>, wherein x is an integer of 1 to 30 and the groups CR<2>R<3> are the same or different and R<2>, R<3>, R<4>, R<5> and R<6> are the same or different and each is hydrogen, halogen, alkyl, alkoxy, aryl or aryloxy; k, l, m and n are the same or different and each is an integer of 0 to 4, provided that (k+1+m+n) is 1 or greater; M is Si, Ge or Sn, and the groups Y are the same or different and each is aryloxyl, alkoxy, trialkylsiloxy, triarylsiloxy, trialkoxysiloxy or acyloxy.