Patent ID: 7015002

Claim:
A method of detecting a biological molecule, comprising reacting a sample containing the biological molecule with an organic electroluminescence dye (EL-dye), to label the biological molecule, and measuring the fluorescence of the biological molecule which has been labeled with the organic EL-dye, wherein the organic EL-dye is a compound selected from the group consisting of the following formula (1) to (6): wherein, R 1 , R 2 , R 3 , R 4 and R 5 are each independently an aromatic hydrocarbon group, hydrocarbon group, heterocyclic group or aromatic group containing a hetero atom in the ring, optionally having a substituent selected from hydrogen atom, halogen atom, hydroxyl group, cyano group or sulfonyl group, and X is a nitrogen atom, sulfur atom, oxygen atom, selenium atom or boron atom, optionally having a substituent.