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Volumn 33, Issue 5, 2000, Pages 1487-1488

Synthesis of novel π-conjugated polymer having an enyne unit by palladium-catalyzed three-component coupling polymerization and subsequent retro-Diels-Alder reaction

Author keywords

[No Author keywords available]

Indexed keywords

CATALYSIS; INFRARED SPECTROSCOPY; MOLECULAR WEIGHT; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; ORGANIC SOLVENTS; PALLADIUM; POLYMERIZATION; SYNTHESIS (CHEMICAL); TEMPERATURE; TOLUENE; VACUUM;

EID: 0033894231     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma991459k     Document Type: Article
Times cited : (44)

References (34)
  • 31
    • 0342405961 scopus 로고    scopus 로고
    • note
    • 4 (0.0231 g, 0.01 mmol), 1 (0.165 g, 0.50 mmol), 2 (0.9214 g, 10 mmol), 3 (0.226 g, 0.5 mmol), and toluene (2 mL), and the mixture was kept stirring at ambient temperature for 15 min under nitrogen. The tube was then sealed under reduced pressure. After the reaction at 100 °C for 2 days, the reaction mixture was precipitated with methanol and then with n-hexane. The precipitate was freeze-dried from benzene. 4: yield 82% (0.156 g, 0.41 mmol).
  • 32
    • 0342840838 scopus 로고    scopus 로고
    • note
    • 24: C, 93.71%; H, 6.29%. Found: C, 91.58%; H, 6.42%; Cl, 0.55%. The observed lower carbon content is most probably due to contamination of the palladium catalyst.
  • 33
    • 0343275671 scopus 로고    scopus 로고
    • note
    • To estimate the thermal stability of the model compound (cis, exo-1,4-bis[2-{2-(4-dodecyloxyphenyl)bicyclo[2,2,1]heptenyl}ethynyl]benzene), TGA analysis was carried out under nitrogen (at a heating rate of 10 °C/min), from which the weight loss started at 178 °C and the 10% weight loss was observed at 231 °C.
  • 34
    • 0343275667 scopus 로고    scopus 로고
    • note
    • TGA data of the polymer 4 (taken at a heating rate of 10 °C/min) indicate that the retro-Diels-Alder reaction proceeded at lower temperature compared with that of the model compound. This difference might be explained by the difference in the thermodynamic energy between the starting norbornene and enyne derivatives.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.