Non-resonant two-photon absorption induction method and process for emitting light thereby, optical data recording medium and process for recording data thereon

Abstract

The present invention provides a two-photon light-emitting compound represented by formula (1), an optical data recording medium comprising a compound represented by formula (1), a two-photon polymerizable composition comprising a polymerizable monomer or polymerizable oligomer and at least a compound represented by formula (1), and a photopolymerization process: X 2 —(—CR 4 ═CR 3 —) m —C(═O)—(—CR 1 ═CR 2 —) n —X 1   ( 1 ) wherein X 1 and X 2 may be the same or different and each represent a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom or substituent; some of R 1 , R 2 , R 3 and R 4 may be connected to each other to form at least one ring; and n and m each independently represent an integer of from 1 to 4, with the proviso that when n and m are 2 or more, the plurality of R 1 's, R 2 's, R 3 's, and R 4 's each may be the same or different.

1 - 4 . (canceled)  
     
     
         5 . An optical data recording medium capable of recording data with a laser beam, which comprises a compound represented by the general formula (1) incorporated therein:  
         X 2 —(—CR 4 ═CR 3 —) m —C(═O)—(—CR 1 ═CR 2 —) n —X 1    (1)  
       wherein X 1  and X 2  may be the same or different, each represent a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group; R 1 , R 2 , R 3  and R 4 , each independently represent a hydrogen atom or a ring; some of R 1 , R 2 , R 3  and R 4  may be connected to each other to form at least one ring; and n and m, each independently represent an integer of from 1 to 4, with the proviso that when n and m are 2 or more, the plurality of R 1 's, R 2 's, R 3 's, and R 4 's each may be the same or different.  
     
     
         6 . A process for recording data utilizing the optical data recording medium according to  claim 5  by irradiating the recording medium with a laser beam having a wavelength longer than the linear absorption band of the compound of the general formula (1) and free of linear absorption, to thereby induce two photon absorption.  
     
     
         7 - 8 . (canceled)  
     
     
         9 . The optical data recording medium according to  claim 5 , wherein a cyclic structure formed by R 1 , R 2 , R 3  and R 4  is a 5-, 6- or 7-membered ring.  
     
     
         10 . The process according to  claim 6 , wherein a cyclic structure formed by R 1 , R 2 , R 3  and R 4  is a 5-, 6- or 7-membered ring.  
     
     
         11 . The optical data recording medium according to  claim 5 , wherein a cyclic structure formed by R 1 , R 2 , R 3  and R 4  is a 5- or 6-membered ring.  
     
     
         12 . The process according to  claim 6 , wherein a cyclic structure formed by R 1 , R 2 , R 3  and R 4  is a 5- or 6-membered ring.  
     
     
         13 . The optical data recording medium according to  claim 5 , wherein X 1  and X 2  may be the same or different, each represent a C 6 -C 30  substituted or unsubstituted aryl group or a C 1 -C 10  substituted or unsubstituted heterocyclic group.  
     
     
         14 . The process according to  claim 6 , wherein X 1  and X 2  may be the same or different, each represent a C 6 -C 30  substituted or unsubstituted aryl group or a C 1 -C 10  substituted or unsubstituted heterocyclic group.