Patent ID: 8119041

Claim:
A non-resonance two-photon absorption induction method which comprises irradiating a compound represented by the general formula (1) with laser beam having a wavelength longer than the linear absorption band of the compound of the general formula (1) to induce non-resonance two-photon absorption: 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 or a substituted or unsubstituted heterocyclic; R 1 , R 2 , R 3 and R 4 each independently represent a hydrogen atom or some of R 1 , R 2 , R 3 and R 4 may be connected to each other to form at least one 5-, 6- or 7-membered ring; and n and m, each independently represent an integer of from 1 to 4, with the proviso that when n or m is 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, wherein the substituted aryl for X 1 and X 2 is an aryl substituted with at least one selected from the group consisting of a C 1 -C 20 linear or cyclic alkyl, a C 6 -C 18 unsubstituted aryl, a C 2 -C 20 alkenyl, a C 2 -C 20 alkynyl, a halogen atom, a C 2 -C 20 amino, a cyano, a hydroxyl, a carboxyl, a C 2 -C 10 acyl, a C 1 -C 20 alkoxy, a C 6 -C 18 aryloxy, a C 1 -C 20 alkylthio, a C 6 -C 18 arylthio, a C 1 -C 20 alkylsulfonyl, a C 6 -C 18 arylsulfonyl, a C 1 -C 10 carbamoyl, a C 1 -C 10 amide, a C 2 -C 12 imide, a C 2 -C 10 acyloxy, a C 2 -C 10 alkoxycarbonyl, and a C 1 -C 10 heterocyclic, and the substituted heterocyclic for X 1 and X 2 is a heterocyclic substituted with at least one selected from the group consisting of a C 1 -C 20 linear or cyclic alkyl, a C 6 -C 18 unsubstituted aryl, a C 2 -C 20 alkenyl, a C 2 -C 20 alkynyl, a halogen atom, a C 2 -C 20 amino, a cyano, a hydroxyl, a carboxyl, a C 2 -C 10 acyl, a C 1 -C 20 alkoxy, a C 6 -C 18 aryloxy, a C 1 -C 20 alkylthio, a C 6 -C 18 arylthio, a C 1 -C 20 alkylsulfonyl, a C 6 -C 18 arylsulfonyl, a C 1 -C 10 carbamoyl, a C 1 -C 10 amide, a C 2 -C 12 imide, a C 2 -C 10 acyloxy, a C 2 -C 10 alkoxycarbonyl, and a C 1 -C 10 heterocyclic.