Patent ID: 8642763

Claim:
A nickel complex (NiBDPP) or derivatives thereof, having a structural formula (I): wherein R 1 denotes H or -A-R′; wherein A denotes O or N; wherein R′ is H, an alkoxy group, an amino acid group, or a polymeric group; wherein said polymeric group is a polyethyleneoxy group, a polydimethylsiloxane group, or polyurethane; wherein R 2 is H or a para-substituent of a phenyl ring, said para-substituent of said phenyl ring is selected from a group consisting of alkyl groups, alkoxy groups, silane groups, amino groups, alkyl amino groups, and a hydroxyl group; wherein R 3 is a H or a para-substituent of a pyridine ring, said para-substituent of said pyridine ring is selected from a group consisting of amino groups, alkyl amino groups, siloxane amino groups, and siloxane amino groups which attach to a Fe 3 O 4 /SiO 2 magnetic nanoparticle; and wherein said nickel is a nickel(II) or nickel(III) ion.