title: Gold nanoparticles bifunctionalized by chemiluminescence reagent and catalyst metal complexes: synthesis and unique chemiluminescence property.
abstract: Despite much progress in functionalized gold nanomaterial (GNMs), chemiluminescent (CL) functionalized GNMs with high CL efficiency are far from fully developed. In this work, we report a general strategy for the synthesis of gold nanoparticles (GNPs) bifunctionalized by CL reagent and catalyst metal complexes (BF-GNPs) by taking N-(aminobutyl)-N-(ethylisoluminol) (ABEI) as a model of CL reagents. The complexes of 2-[bis[2-[carboxymethyl-[2-oxo-2-(2-sulfanylethylamino)ethyl]amino]ethyl]amino]acetic acid (DTDTPA) with various metal ions, including Co(2+), Cu(2+), Pb(2+), Ni(2+), Hg(2+), Cr(3+), Eu(3+), La(3+), Gd(3+), Sm(3+), Er(3+), Dy(3+), Ce(4+), and Ce(3+), were grafted on the surface of ABEI functionalized GNPs (ABEI-GNPs) to form a series of BF-GNPs. These BF-GNPs exhibited excellent CL activity. In particular, the CL intensity of DTDTPA/Co(2+)-ABEI-GNPs was over 3 orders of magnitude higher than ABEI-GNPs. This work demonstrates for the first time that metal complexes grafted on the surface of GNPs have unique catalytic activity on the CL reaction, superior to that in the liquid phase. Such BF-GNPs may find future applications in bioassays, microchips, and molecular/cellular imaging.
authors.affiliation: CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.
authors.forename: Mengxiao
authors.initials: M
authors.lastname: Liu
authors.forename: Hongli
authors.initials: H
authors.lastname: Zhang
authors.forename: Jiangnan
authors.initials: J
authors.lastname: Shu
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Liu
authors.forename: Fang
authors.initials: F
authors.lastname: Li
authors.forename: Hua
authors.initials: H
authors.lastname: Cui