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Electrochemiluminescence of Tris(2,2′‐bipyridyl)ruthenium(II) Ion‐Exchanged in Polyelectrolyte‐Silica Composite Thin‐Films
Author(s) -
Wang Haiyan,
Xu Guobao,
Dong Shaojun
Publication year - 2002
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200206)14:12<853::aid-elan853>3.0.co;2-d
Subject(s) - electrochemiluminescence , ruthenium , composite number , sulfonate , polyelectrolyte , detection limit , materials science , styrene , electrode , electrochemistry , inorganic chemistry , polymer chemistry , sodium , chemical engineering , chemistry , composite material , catalysis , copolymer , chromatography , polymer , organic chemistry , metallurgy , engineering
The organic‐inorganic hybrid, PSS‐silica composite material was developed for the immobilization of tris(2,2′‐bipyridyl)ruthenium(II) $\rm{ {(Ru(bpy)}_{ 3}^{{2 + }} )}$ on glassy carbon electrode via ion‐exchange (PSS stands for poly(sodium 4‐styrene‐sulfonate)). The electrochemiluminescence (ECL) and electrochemistry of $\rm{ {Ru(bpy)}_{ 3}^{{2 + }}}$ immobilized in the composite thin films have been investigated with tripropylamine (TPA) as the coreactant. The immobilized $\rm{ {Ru(bpy)}_{ 3}^{{2 + }} }$ underwent a surface process. The modified electrode was used for the ECL detection of TPA and showed high sensitivity. Detection limit was 0.1 μmol L −1 for TPA (S/N=3) with a linear range from 0.5 μmol L −1 to 5 mmol L −1 ( R =0.998). Moreover, the resulting modified electrode was stable over six months and the good stability may be due to the strong interaction between $\rm{ {Ru(bpy)}_{ 3}^{{2 + }} }$ and the high ion‐exchangeable PSS‐silica composite films on GCE. Compared with other materials, the PSS‐silica composite films containing incorporated $\rm{ {Ru(bpy)}_{ 3}^{{2 + }} }$ showed improved sensitivity and long‐term stability. Thus, such composite thin film can be a promising material for the construction of ECL sensor.