Tomlinson, Edward P. published the artcileTuning the Thermoelectric Properties of a Conducting Polymer through Blending with Open-Shell Molecular Dopants, Recommanded Product: 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, the publication is ACS Applied Materials & Interfaces (2015), 7(33), 18195-18200, database is CAplus and MEDLINE.
Polymer thermoelec. devices are emerging as promising platforms by which to convert thermal gradients into electricity directly, and poly(3,4-ethylene dioxythiophene) doped with poly(styrenesulfonate) (PEDOT:PSS) is a leading candidate in a number of these thermoelec. modules. Here, we implement the stable radical-bearing small mol. 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO-OH) as an intermol. dopant in order to tune the elec. conductivity, thermopower, and power factor of PEDOT:PSS thin films. Specifically, we demonstrate that, at moderate loadings (â?%, by weight) of the open-shell TEMPO-OH mol., the thermopower of PEDOT:PSS thin films is increased without a marked decline in the elec. conductivity of the material. This effect, in turn, allows for an optimization of the power factor in the composite organic materials, which is a factor of 2 greater than the pristine PEDOT:PSS thin films. Furthermore, because the loading of TEMPO-OH is relatively low, we observe that there is little change in either the crystalline nature or surface topog. of the composite films relative to the pristine PEDOT:PSS films. Instead, we determine that the increase in the thermopower is due to the presence of stable radical sites within the PEDOT:PSS that persist despite the highly acidic environment that occurs due to the presence of the poly(styrenesulfonate) moiety. Addnl., the oxidation-reduction-active (redox-active) nature of the TEMPO-OH small mols. provides a means by which to filter charges of different energy values. Therefore, these results demonstrate that a synergistic combination of an open-shell species and a conjugated polymer allows for enhanced thermoelec. properties in macromol. systems, and as such, it offers the promise of a new design pathway in polymer thermoelec. materials.
ACS Applied Materials & Interfaces published new progress about 219543-09-6. 219543-09-6 belongs to piperidines, auxiliary class Piperidine,Fluoride,Salt,Amine,Amide, name is 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate, and the molecular formula is C5H10Cl3O3P, Recommanded Product: 4-Acetamido-2,2,6,6-tetramethyl-1-oxopiperidinium Tetrafluoroborate.
Referemce:
https://en.wikipedia.org/wiki/Piperidine,
Piperidine | C5H11N – PubChem