Composition for ultraviolet absorbent substance and ultraviolet absorbent substance comprising same

A composition for an ultraviolet absorbent substance which comprises at least one metal complex represented by formula (1) and at least one matrix material and/or polymerizable monomer as a precursor of a matrix material:

• wherein Y1, Y2, Y3 and Y4 are each, independently of one another, NH, NR5, an oxygen atom or a sulfur atom, and
• R5 of NR5 assigned to Y1, Y2, Y3 or Y4 is an alkyl group having 1 to 8 carbon atoms or an aryl group having 6 to 15 carbon atoms, which may have substituent(s),
• with proviso that
• Z1 and Z2 are each, independently of one another, a nitrogen atom or CR6;
• R6 of CR6 assigned to Z1 or Z2 represents an alkyl group having 1 to 8 carbon atoms, which may have substituent(s), when Y1, Y2, Y3 or Y4 are not all oxygen atoms, or an alkyl group having 2 to 8 carbon atoms, which may have substitute(s), when all of Y1, Y2, Y3 or Y4 are oxygen atoms;
• an aryl group having 6 to 15 carbon atoms, which may have substituent(s);
• a heteroaryl group having 4 to 12 carbon atoms, which may have substituent(s);
• a heteroaralkyl group having 5 to 12 carbon atoms, which may have substituent(s);
• or an aralkyl group having 7 to 15 carbon atoms, provided that when Z1 and Z2 are both represented by CR6, these occurrences of R6 of CR6 each represent a substituent which is independent of each other;
• and
• each of R1, R2, R3 and R4 is absent or, if present, one to four of 4 hydrogen atoms bound to 4 carbon atoms other than 2 carbon atoms shared with a five-membered ring among 6 carbon atoms of one benzene ring can be substituted, and all of substituents substituting for hydrogen atom(s) of the four benzene rings are each, independently of one another, an alkyl group having 1 to 8 carbon atoms, which may have substituent(s), a hydroxyl group, a carboxyl group, an alkoxy group having 1 to 4 carbon atoms, a halogeno group, an alkylaminosulfonyl group having 1 to 8 carbon atoms, which may have substituent(s), a morpholinosulfonyl group which may have substituent(s), a piperidinosulfonyl group which may have substituent(s), a pyrrolidinosulfonyl group which may have substituent(s), a thiomorpholinosulfonyl group which may have substituent(s) or a piperazinosulfonyl group which may have substituent(s), and
• M represents a metal atom.