Patent ID: 6818733
Filing Date: 2004-11-16
Classification: C09K,H01L,Y10S

Abstract:
A polymeric fluorescent substance exhibiting fluorescence in solid state, having a polystyrene reduced number-average molecular weight of 5Ã—104 to 1Ã—108, and containing one or more repeating units of the following general formula (1) and one or more repeating units of formula (3), the total amount of the repeating units being 50 mol % or more based on the total amount of all repeating units, and the total amount of repeating units of formula (1) being from 0.1 mol % to 15 mol % based on the total amount of all repeating units of formulae (1) and (3): wherein, Ar1 represents an arylene group having 6 to 60 carbon atoms contained in the main chain part or a divalent heterocyclic group having 4 or more and 60 or less carbon atoms contained in the main chain part thereof, Ar2 represents an aryl group having 6 to 60 carbon atoms or a heterocyclic group having 4 to 60 carbon atoms, 1 represents an integer from 1 to 4, and m represents an integer from 1 to 4, provided 1+m does not exceed the maximum possible number of substituents on Ar1, X represents an oxygen atom, sulfur atom or a group of formula (2), R3 is selected from the group consisting of an alkyl group having 1 to 20 carbon atoms, an aryl groups having 6 to 60 carbon atoms, an arylalkyl group having 7 to 60 carbon atoms and a heterocyclic group having 4 to 60 carbon atoms, each of R1 and R2 independently is selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 60 carbon atoms, a heterocyclic group having 4 to 60 carbon atoms and cyano group, and n is 0 or 1,â€”CR4&boxH;CR5â€”â€ƒâ€ƒ(2) wherein, each of R4 and R5 independently is selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 60 carbon atoms, a heterocyclic group having 4 to 60 carbon atoms and cyano group,â€”Ar3â€”(CR6&boxH;CR7)kâ€”â€ƒâ€ƒ(3) wherein, Ar3 is an arylene group having 6 to 60 carbon atoms in the main chain part thereof or a heterocyclic group having 4 to 60 carbon atoms in the main chain part thereof, Ar3 may have a substituent, however, does not simultaneously have substituents represented by â€”Ar2 and â€”Xâ€”R3 in the formula (1), each of R6 and R7 independently is selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 60 carbon atoms, a heterocyclic group having 4 to 60 carbon atoms and cyano group, k is 0 or 1.