Development of a redox polymer based on poly(2-hydroxyethyl methacrylate) for disposable amperometric sensors

Abstract

Membranes based on poly(2-hydroxyethyl methacrylate), chemically modified with ferrocene functionalities, are proposed as novel coatings for the development of disposable amperometric sensors. They are massproduced on an inert support through an UV photo-induced polymerization, forming self-standing films that can be transferred on an electrode surface. Thanks to the characteristic of the functionalized methacrylate matrix to rapidly and reversibly swell by incorporation of large amounts of water, the ferrocene moieties are in intimate contact with the electrolytic solution. They can activate effective electrocatalytic processes that can be exploited in the field of amperometric sensing. The performance of the methacrylate coating with respect to the determination of hydroquinone benchmark analyte has been tested both in a static solution and in a flux cell.

The Sensitization of Scintillation in Polymeric Composites Based on Fluorescent Nanocomplexes

“…As showed in Figure 2b, the dye first absorption band peaked at 525 nm is in excellent resonance with the superstructure emission, thus allowing a non-radiative energy transfer mechanism of the Förster type [20] that can be exploited for the sensitization of the emitter luminescence. Moreover, it is worth noting that the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energies of both the luminescent systems are similar (Figure 2f, inset) and deeper than the ones of the host polymer [21][22][23][24][25]. This indicates that the electronic affinities of both compounds are comparable and therefore we can reasonably consider valid the assumption α ∼ = β for the charge capture rate constants.…”