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Volumn 44, Issue 9, 2011, Pages 3338-3345

Synthesis, chiroptical properties, and photoresponsiveness of optically active poly(m -phenyleneethynylene)s containing azobenzene moieties

Author keywords

[No Author keywords available]

Indexed keywords

AGGREGATED STRUCTURE; AZOBENZENE MOIETY; CHIROPTICAL PROPERTIES; HELICAL CONFORMATION; HIGHER-ORDER STRUCTURE; METHOXY; N ,N-DIMETHYLFORMAMIDE; OPTICALLY ACTIVE; PHENYLENEETHYNYLENE; PHENYLGLYCINES; PHOTORESPONSIVENESS; SPECTROSCOPIC DATA; THERMALLY STABLE; UV- AND; VISIBLE-LIGHT IRRADIATION;

EID: 79955646294     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma200281e     Document Type: Article
Times cited : (39)

References (60)
  • 49
    • 79955643746 scopus 로고    scopus 로고
    • 3 (50 mM) to confirm the purity of the polymer chain. One broad signal assignable to -C=C- was observed around 80.1 ppm. No peak assignable to -C=C-C=C- was observed around 74 ppm (e.g., Ph-C=C-C=C-Ph 74.2 ppm). Consequently, it is concluded that oxidative acetylene coupling, a typical side reaction of the Sonogashira-Hagihara coupling, does not take place during the polymerization, and the present polymer does not contain diacetylene units. The relatively low molecular weights of the polymers may be caused by a small deviation from equivalency between the diiode monomers and diyne monomers due to the small scale of the polymerization (0.30 mmol).
    • 3 (50 mM) to confirm the purity of the polymer chain. One broad signal assignable to -C=C- was observed around 80.1 ppm. No peak assignable to -C=C-C=C- was observed around 74 ppm (e.g., Ph-C=C-C=C-Ph 74.2 ppm). Consequently, it is concluded that oxidative acetylene coupling, a typical side reaction of the Sonogashira-Hagihara coupling, does not take place during the polymerization, and the present polymer does not contain diacetylene units. The relatively low molecular weights of the polymers may be caused by a small deviation from equivalency between the diiode monomers and diyne monomers due to the small scale of the polymerization (0.30 mmol).
  • 50
    • 79955665279 scopus 로고    scopus 로고
    • -3 wt %)] attributable to the aggregates. It is presumed that this is due to the difference in sample concentrations between DLS and CD measurements. The concentrations of the DLS samples were 65-80 times higher than those of the CD samples. Because of the different requirements of sample concentrations, we could not obtain the data of DLS and CD at the same concentration.
    • -3 wt %)] attributable to the aggregates. It is presumed that this is due to the difference in sample concentrations between DLS and CD measurements. The concentrations of the DLS samples were 65-80 times higher than those of the CD samples. Because of the different requirements of sample concentrations, we could not obtain the data of DLS and CD at the same concentration.
  • 53
    • 79955654649 scopus 로고    scopus 로고
    • Aggregation also seems to contribute to the thermal stability in the case of poly(1b - 2a).
    • Aggregation also seems to contribute to the thermal stability in the case of poly(1b - 2a).
  • 60
    • 0037571112 scopus 로고    scopus 로고
    • The molecular mechanics calculation was carried out with
    • 519. Wavefunction, Inc., Spartan '08 Macintosh.
    • Halgren, T. A. J. Comput. Chem. 1996, 17, 490 - 519. The molecular mechanics calculation was carried out with Wavefunction, Inc., Spartan '08 Macintosh.
    • (1996) J. Comput. Chem. , vol.17 , pp. 490
    • Halgren, T.A.1


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.