Novel aromatic polymers from benzaldehyde and triphenylamine derivatives: Synthesis, electrochromic, and photochemical properties

Abstract

A series of novel triphenylamine-based polymers were synthesized from benzaldehyde and triphenylamine derivatives. All the polymers having high molecular weight are readily soluble in many organic solvents and could be solution-cast into amorphous films. They had glass transition temperatures (T g s) in the range of 193-217 C, and 10% weight loss temperatures in excess of 475 C. Cyclic voltammograms of all polymers showed reversible oxidation redox peaks and E onset around 0.42-0.90 V, indicating that the polymers are electrochemically active and stable. In addition, all these polymers revealed photochemical characteristics in conformity with their electrochromic characteristics.

Hole Transport in Triphenylamine Based OLED Devices: From Theoretical Modeling to Properties Prediction

“…Very good performance of triphenylamine derivatives as HTM is attributed to relatively high hole mobility and low ionization potentials. − So far, much effort has been made to understand the relationship between molecular structure and transport properties of TPA derivatives, which is a key point for providing guidelines for device design. Over the years, special interest has been paid especially to synthesis, electrochemistry (cyclovoltametry), Raman, FTIR, and UV–vis spectroscopy, − as well as theoretical studies. − …”

The Chromic Response to Environment of some Imine-Based Oligomers

“…7) was slightly hypsochromically shifted compared with pristine solution, suggesting there was some degradation during the photoirradiation process. The drastic color changes can be assigned to the different electronic states of O1 (proton tautomerism or cis-trans photoisomerization) and configuration rearrangement upon photoirradiation [12,13]. O2 proved to be very stable upon photoirradiation along with reversible color change between the two electronic states.…”

Synthesis and Structure-Activity Relationship of <i>N</i>-Substituted Carbazole Oxime Ester Photoinitiators

“…Owing to its unique temporal and spatial controllability, photopolymerization has a wide range of applications in coating, 3D printing, photoresist, etc [1][2][3][4][5][6][7][8][9]. Compared to traditional thermal polymerization, photopolymerization is efficient, environmentally friendly and easy to operate [10,12].…”