1-アルカノール中での陽極酸化処理を用いる化学修飾炭素電極の作製とその電気分析化学的利用
スポンサーリンク
概要
- 論文の詳細を見る
Anodization of a glassy carbon (GC) in a 1-alkanol in a cycled or constant potential mode serves as a useful tool for preparing a chemically modified GC electrode. By this treatment, 1-alkanol molecules are fixed on the GC surface via ether linkage. As the 1-alkanol in the anodic modification, CH_3(CH_2)_nOH (1 : n=0-7), HO(CH_2)_nOH (2 : n=1-5), and HO(CH_2CH_2O)_nR (3 : n=1-4,R=H; 4 : n=1-3,R=CH_3) are utilized. The surface of a GC electrode anodized in the 1-alkanol remarkably reflects the identities of the modifiers. Some of the modified GC electrodes exhibit surface characteristics useful for electroanalytical application as follows : (1) the surface of the GC electrode anodized in 3 or 4 is hydrophilic and resists protein adsorption. An HPLC system equipped with an electrochemical detector employing the GC plate anodized in triethylene glycol as a working electrode has proven to provide a useful analytical method for a protein-containing sample; (2) in the course of anodization of the GC electrode in 2,the diol molecules are first fixed on the surface via ether linkage with one of hydroxyl groups, and the remaining terminal hydroxyl groups in some of the fixed molecules are then oxidized to carboxyl groups. Thus, the GC electrode anodically modified with 2 has carboxyl groups on the surface, which allow dopamine to be voltammetrically discriminated from ascorbic acid in a large excess; (3) when the GC electrode is anodized in triethylene glycol containing HOCH_2CH_2SO_3Na, carboxyl groups are effectively introduced on the surface. On the basis of the formation of an amide bond formation through chemical reaction between the functional groups and amino compounds, electrochemical catalysts such as 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) and catechol are immobilized on the surface of the GC electrode. The obtained electrodes shows stable voltammetric and electrochemically catalytic performance probably because the catalytic molecules are confined on the electrode surfaces via a hydrophilic linker instead of a hydrophobic one.
- 2000-02-01
論文 | ランダム
- 適応信号処理アルゴリズムによる転がり軸受の音響診断技術(音響計測)
- 103 AR モデルによる転がり軸受音響診断へのサンプリング周波数および AR フィルタ長の影響
- 208 正確な区分時点推定に基づいた局所定常 AR モデルによる転がり軸受の音響診断
- 短時間FETとウィグナー分布によるジェットスクリーチの時間-周波数解析
- 短時間フーリエ変換とウィグナー分布によるジェットスクリーチの時間-周波数解析 -強非定常スクリーチの特性-