New monomers for the synthesis of heat-stable polyheterocycles

Evstaf'ev, V. P.; Braz, G.I.; Yakubovich, A.Ya.

doi:10.1007/bf00470517

Cited by 2 publications

(2 citation statements)

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“…The synthesis of the copoly(benzoxazole) imides is given in Scheme and the detailed procedure is given in the Supporting Information. A suitable diamine monomer (2,6-bis( p -aminophenyl)benzo[1,2- d ;5,4- d ′]bisoxazole) (bisoxazole diamine) containing the preformed benzobisoxazole unit was synthesized in PPA at 170 °C using 4-aminobenzoic acid and DADHB, following the literature procedure . The diaminobisoxazole monomer was condensed with perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) or 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTCDA) to form the polyimides PerPBO or NapPBO in a one-step imidization in m -cresol and isoquinoline at 180−210 °C in good yields.…”

Section: Resultsmentioning

confidence: 99%

n-Type Field Effect Transistors Based on Rigid Rod and Liquid Crystalline Alternating Copoly(benzobisoxazole) Imides Containing Perylene and/or Naphthalene

et al. 2010

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The synthesis, characterization, and device studies of poly(benzobisoxazole imide)s containing perylene or naphthalene units in an alternating fashion with the oxazole unit are described. Photoinduced energy transfer and charge separation were studied in methanesulfonic acid (MSA) solution via absorption, excitation, and steady-state fluorescence studies. Excitation of the bisoxazole moiety resulted in enhanced emission from the perylene bisimide unit as a result of FRET (Förster resonance energy transfer). The influence of the imide substitution into the linear chain of poly(benzobisoxazole) (PBO) on its solid-state packing was examined by wide-angle X-ray diffraction (WXRD) analysis. Bottom contact field effect transistors (FET) based on thermally annealed polymer films were fabricated and studied. The polymers showed n-type charge transport and current modulation with an on/off ratio greater than 10(2). It was observed that the FETs consisting of the random copolymer of bisoxazole containing both perylene as well as naphthalene bisimide units had higher performance parameters such as better mobility (μ(e)) and I(on)/I(off) ratio compared to those of the pristine systems.

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Section: Resultsmentioning

confidence: 99%

n-Type Field Effect Transistors Based on Rigid Rod and Liquid Crystalline Alternating Copoly(benzobisoxazole) Imides Containing Perylene and/or Naphthalene

et al. 2010

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“…2,6-Bis(4-aminophenyl)benzo(1,2-d:5,4-d 0 )dioxazole, which can be used for the synthesis of thermally stable polyheterocycles, has been known for a long time (Evstaf'ev et al, 1970;Preston et al, 1968). A recent study described its synthesis from 1,2,3-trichlorobenzene and its purification (Chen et al, 2003).…”

Section: Commentmentioning

confidence: 99%