Ortho-CATENATION and trifluoromethyl graphting as driving forces in electro-optical properties modulation of ethanol soluble triphenylamine-based polyimides

被引：24

作者：

Constantin, Catalin-Paul ^{[1
]}

Damaceanu, Mariana-Dana ^{[1
]}

Bruma, Maria ^{[1
]}

Begunov, Roman S. ^{[2
]}

机构：

[1] Petro Poni Inst Macromol Chem, Polycondensat & Thermostable Polymers Dept, Aleea Grigore Ghica Voda 41A, Iasi 700487, Romania

[2] Demidov Yaroslavl State Univ, Ul Sovestkaya 14, Yaroslavl 150000, Russia

来源：

DYES AND PIGMENTS | 2019年 / 163卷

关键词：

Triphenylamine; Polyimides; Ortho-catenation; Dual intramolecular charge transfer; FRET; Schottky behavior; GAS-TRANSPORT PROPERTIES; SUBSTITUTED TRIPHENYLAMINE; AROMATIC POLYAMIDES; SIDE-GROUPS; FILMS; POLY(AMINE-IMIDE)S; DIANHYDRIDE; MEMBRANE; BEARING; DONOR;

D O I：

10.1016/j.dyepig.2018.11.046

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A novel aromatic trifluoromethyl (CF3)-substituted triphenylamine (TPA)-based diamine was synthesized am subjected to polycondenstion with various commercial aromatic dianhydrides. The obtained polyimides exhibit excellent solubility in common organic solvents, including ethanol, allowing their processing in thin films under environmentally friendly conditions. These polymers possess superior thermal stability, up to 485 degrees C and high glass transition temperature. The photo-optical properties were investigated in detail and the results evidence the existence of a dual intramolecular charge transfer (ICT) between TPA and CF3 units, on one hand and triphenylamine and phthalimide, on the other hand, a feature rarely encountered at TPA-based polyimides. The occurrence of the FRET mechanism between these two ICT exited states that modulates the light emission toward yellow-orange spectral range is a totally novel aspect highlighted for this type of polymers. Prototype device with ITO/PEDOT:PSS/polyimide/Ag configuration were also fabricated and preliminary investigations of the electrical characteristics were performed.

引用

页码：126 / 137

页数：12