Two-photon polymerizable composition and process for polymerization thereof

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 - 6 . (canceled)  
     
     
         7 . A two-photon polymerizable composition photopolymerizable by two-photon absorption comprising at least a two-photon absorption material and a polymerizable monomer or polymerizable oligomer, wherein the two-photon absorption material is a compound represented by the following general formula (1):  
           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.  
     
     
         8 . A photopolymerization process which causes polymerization reaction utilizing two-photon or higher multiple photon absorption induced by irradiating the polymerizable composition according to  claim 7  with laser beam having a wavelength longer than the linear absorption band of the compound of the general formula (1) and free of linear absorption.  
     
     
         9 . The two-photon polymerizable composition according to  claim 7 , 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 photopolymerization process according to  claim 8 , 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 two-photon polymerizable composition according to  claim 7 , wherein a cyclic structure formed by R 1 , R 2 , R 3  and R 4  is a 5- or 6-membered ring.  
     
     
         12 . The photopolymerization process according to  claim 8 , wherein a cyclic structure formed by R 1 , R 2 , R 3  and R 4  is a 5- or 6-membered ring.  
     
     
         13 . The two-photon polymerizable composition according to  claim 7 , 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 photopolymerization process according to  claim 8 , 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.