22915-81-7

Upstream product

• 456-22-4 4-Fluorobenzoic acid 
• 324-81-2 2,5-bis(p-fluorophenyl)-1,3,4-oxadiazole 
• 123-30-8 4-amino-phenol 

Relevant academic research and scientific papers

Copoly(peryleneimide)s containing 1,3,4-oxadiazole rings: Synthesis and properties

New copolyimides containing perylenediimide, oxadiazole and hexafluoroisopropylidene moieties were prepared by one-step polycondensation reaction in solution at high temperature of aromatic diamines containing preformed oxadiazole ring with a mixture of a dianhydride having a perylene ring and another dianhydride with hexafluoroisopropylidene unit. The thermal stability and glass transition temperatures of these copolyimides were measured and compared with those of related polyimides. The solid polymers were also studied by polarized light microscopy and X-ray diffraction which revealed a semicrystalline state consisting of face-to-face arranged columns of perylenediimide units. The film-forming ability and properties of the resulting thin films were investigated by using atom force microscopy and scanning electron microscopy which showed that the films were organized into selfassembled rod-like structures. The UV-Vis and photoluminescence properties in solution and in solid state were also investigated.

Fluorinated heterocyclic polyperyleneimides

New polyperyleneimides containing 1,3,4-oxadiazole rings and hexafluoroisopropylidene linkages were synthesized by solution polycondensation reaction at high temperature of aromatic diamines having oxadiazole rings with a mixture of perylenetetracarboxylic dianhydride and hexafluoroisopropylidene diphthalic dianhydride. The solubility and thermal stability of these polymers were studied and compared with those of related polyimides and polyoxadiazoles. The film-forming ability and the quality of the resulting thin films were investigated by using atom force microscopy and scanning electron microscopy, which showed that the films were organized into self-assembled rod-like structures. The photoluminescence of the polymers, both in solution and in solid state, after irradiation with light of different wavelengths, were also studied.

Polyimides containing 1,3,4-oxadiazole rings

Two series of polyimides containing 1,3,4-oxadiazole rings in the main chain, one of them having flexible hexafluoropropane-2,2-diyl groups and the other with carbonyl groups, were prepared by polycondensation of aromatic diamines containing 1,3,4-oxadiaz

Study of fluorinated poly(1,3,4-oxadiazole-amide)s

Three aromatic fluorinated poly(1,3,4-oxadiazole-amide) were synthesized by solution polycondensation reaction of aromatic diamines containing preformed 1,3,4-oxadiazole ring with a diacid chloride incorporating hexafluorisopropylidene unit. All polymers

Poly(1,3,4-oxadiazole-ester-amide)s

New aromatic poly (1,3,4-oxadiazole)s containing both amide and ester groups in the main chain have been synthesized and their properties have been determined and compared with those of wholly aromatic polyamides and poly(1,3,4-oxadiazole)s. These polymers show good thermal stability, with the initial decomposition temperature around 360°C and the glass transition temperature in the range 190°C-270°C. They are easily soluble in certain solvents such as N-methylpyrrolidinone, N,N′-dimethylacetamide and N,N′-dimethylformamide, and can be cast from solutions into thin flexible films.