A Siloxane Homopolymer with Interacting Ferrocenes as a New Material for the Preparation of Sensors Based on the Detection of Hydrogen Peroxide

Abstract

The electrochemical characterization of a hydrogen peroxide sensor based on a ferrocene-containing polymer electrochemically deposited onto a platinum electrode is described. The redox polymer consists of a siloxane-based homopolymer, with pendant electronically communicated ferrocenyl moieties. The electrodes were used as the transducer for glucose and lactate-sensing enzyme sensors. Amperometric biosensors were prepared by immobilization of glucose oxidase (Gox) or lactate oxidase (Lox) onto these modified electrodes. The steady-state amperometric response of the sensors is investigated as a function of the applied potential and substrate concentration. Interferences, sensitivity and stability of the sensors were also studied.

Multioperational Oxidase Biosensors Based on Carbosilane Dendrimers with Interacting Ferrocenes

“…Dendrimer films with a coverage of about 2 10 À10 mol cm À2 (mol of ferrocene sites cm À2 ) exhibited the best response. Table 1 summarizes the analytical characteristics of these sensors that improve even those other interacting ferrocene mediators studied early [8,28].…”

New ferrocene-containing structures: Poly(silyl ester)s

“…There are many reports on macromolecular systems containing ferrocenyl moiety besides highly flexible dimethyllsiloxane and more rigid organic [5] or silane sequences synthesized in general by transition metal-catalyzed ringopening polymerization of the ferrocenophane [1,[6][7][8][9] or by hydrosilylation of vinyl-functionalized ferrocene with methyl-H-siloxanes [2,[10][11][12]. The literature on the synthesis of siloxane-ferrocene macromolecular systems by polycondensation is very scarce [13] although this procedure permits to use a large range of functionalized monomers having as a result polymers with internal polar functions (ester, amide, etc.…”

Application of biosensors in early detection of contamination with lactic acid bacteria during apple juice and concentrate production

“…The results are more accurate when samples are purified with polyamide 6 as compared with typical adsorbent is PVPP which is used in wine and juice industry (Spagna et al, 1996;Borneman et al, 2001) and in enzymatic assay of lactate to decolorize samples. Also the disturbing influence of vitamin C which is oxidized at the electrode at the same potential as H 2 O 2 (García Armada et al, 2003;Ledru and Boujtita, 2004;Wang et al, 2006) causing the apparent increase of current leading to overestimated results of measurements is partially eliminated by this adsorbent. The application of PVPP is leading to significant increase of measured L-lactate results for both devices.…”