Département de chimie moléculaire

An electrospun poly(acrylonitrile-co-acrylic acid) nanofiber mat (PAN-co-PAAnfm) was successfully collected on the surface of a glassy C electrode (GCE). Scanning electron microscope (SEM) images showed that the porous electrospun mat was composed of ∼160 nm diam. of uniform knitted nanofibers. The cationic luminescence probe, tris(2,2'-bipyridyl)ruthenium(II) complex ([Ru(bpy)3]2+), was innovatively and 1st incorporated into the neg. charged PAN-co-PAAnfm-modified GCE via electrostatic interaction. Compared with the [Ru(bpy)3]2+ immobilized on normal PAN-co-PAA deposited coating, [Ru(bpy)3]2+/PAN-co-PAAnfm exhibited dramatically enhanced electrochem. and electrochemiluminescence (ECL) performances, namely, {\textgreater}100 times higher ECL intensity could be feasibly obtained via the electrospinning technique. The cationic luminescence probe, tris(2,2'-bipyridyl)ruthenium(II) complex ([Ru(bpy)3]2+), was incorporated into laponite-modified glassy carbon electrode (GCE) via two strategies, namely, the adsorption and intercalation methods. These two incorporation methods resulted in different microenvironment for the immobilized [Ru(bpy)3]2+ within laponite as well as the different host-guest and guest-guest interactions. Herein, cyclic voltammetry and electrochemiluminescence (ECL) were innovatively performed to monitor the interactions. Tripropylamine (TPA) was used as coreactant in the electrochem. and ECL system. [on SciFinder(R)]