Optical and Electrical Properties of Monolacunary Keggin-Type Polyoxometalate/Star-Shaped Polycarbazole Nanocomposite Film

Abstract

Polyoxometalates (POM), also known as polyanionic metal oxide clusters, have recently become one of the focus researches in science and technology. In this study, a nanocomposite film electrochemically formed by combining the Keggin type polyoxometalate (K 7-x Na x PW 11 O 39 •14H 2 O) (POM) and star shaped carbazole derivative (N 2 , N 4 , N 6 -tris (9-ethyl-9H-carbazol-3-yl)-1,3,5-triazine-2,4,6-triamine denoted as T3AC. A synergistic interaction between carbazole and POM derivative has been noticed for the first time in the literature. Optical properties of the POM/T3AC solution have been changed due to this interaction which not observed in other electroactive monomers such as pyrrole, thiophene, indole etc. More importantly electrical and optical properties of the nanocomposite structure synthesized electrochemically from this solution have been improved.

Application of Polyoxometalate-based composites for sensor systems: A review

“…Because of their excellent electron and proton transportations and unstable redox behaviors, individual particle magnet activity and optical capabilities are already reported in POM-based composite materials (PCMs) [10][11][12][13]. In multi-electron reduction processes, POMs are good electron reservoirs.…”

The study of activation impact during formation and testing of Ni(OH)2 electrochromic films in the presence of Al3+ and WO42- ions

“…Among electrochromic materials, there are organic [11,12] and inorganic materials [13,14]. Organic materials include some polymers: polyaniline, polypyrrole, polythiophenes and metal polymers.…”

On-Chip Electrochemical Sensing of Propylparaben as an Endocrine Disruptor Model Using a Disposable Gold Platform Modified with Phosphomolybdate Doped Polypyrrole and Nanodiamond

“…39 Polyoxometalates (POMs) with the general formula of [X x M m O y ] q− (0 ≤ x ≤ m) (M = V, Mo, W, Nb, Ta and X may be absent or belong to the elements of 1-17 group) 40 possess interesting catalytic properties. [41][42][43] The POMs are anionic metal-oxide nanoclusters which can be considered as oxide quantum dots. In addition to the electrocatalytic property of POMs, the decoration of anionic POMs within the (p-doped) conducting polymer chain would lead to synthesis of unique hybrid materials that maintain the electrochemical activities of POMs as well as the conducting property of polymeric material.…”