Synthesis, characterization, and electroluminescent properties of a novel perylene‐containing copolyimide

Abstract

A novel diphenylfluorene-based Cardo copolyimide containing perylene (PFB5) was designed and synthesized by polycondensation of a diamine 4,4Ј-(9H-fluoren-9-ylidene)bisphenylamine with perylene dianhydride and another dianhydride in m-cresol with isoquinoline as a catalyst at 200°C. PFB5 was characterized by FTIR, EA, GPC, TGA, DSC, UV-vis, and PL. Because of the existence of the bulky diphenylfluorene units in the backbone, PFB5 showed high thermal stability and good solubility in common solvents such as chloroform. Solubility of PFB5 in low boiling point solvents allows direct spin coating of the polymer films, which exhibit intense photo-and electroluminescence (EL) in the visible range. This nonconjugated polymer could be used as emitting and electron-hole transporting layers in polymer electroluminescent devices (PELDs). EL properties of the unilayer ELDs based on PFB5 are discussed. The device emitted a greenish yellow light.

Synthesis and self‐organization properties of copolyurethanes based on perylenediimide and naphthalenediimide units

“…It is well known that aromatic polyimides generally show poor solubility in organic solvents, especially those derived from rigid anhydrides such as perylenetetracarboxylic dianhydride (PTCDA) and naphthalenetetracarboxylic dianhydride (NTCDA) 9. This property makes them generally intractable or difficult to process, thus restricting their applications 10. However, perylene and naphthalene bisimides are an important class of molecules because of their favorable photochemical behaviors, excellent thermal and photo stabilities, electron acceptor and photoconductive properties, and application as laser dyes 11–19.…”

Two‐step route polycondensation for polynaphthalimides synthesis through high molar mass soluble precursors: A kinetic study

“…[3][4][5] In addition, PNI have been successfully used as ion-exchange membranes [6][7][8] and recent studies point out new prospective applications as active layer materials in optoelectronic industries. [5,[9][10][11][12][13] The major obstacles for inserting PNIs into the market are their insolubility, which leads to difficulties over processing, and low molar mass, which leads to fragility. [4] Consequently, most of the studies related to PNIs are based on strategies for increasing the solubility and molar mass through modifications in the polymer chain, either through monomer modifications or copolymerization.…”

Synthesis, characterization, and catalytic activity of fluorescent polyimide nanocomposites

“…For example, perylene based polymeric materials for CO 2 absorption . Perylene containing copolyimide was synthesized and its electroluminescent properties were studied by Yang et al . Conformational analysis of perylene containing copolyimide was reported in the literature .…”