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Volumn 34, Issue 5, 2001, Pages 1496-1502

Helix inversion of poly(propiolic esters)

Author keywords

[No Author keywords available]

Indexed keywords

CONFORMATIONS; MOLECULAR DYNAMICS; ORGANIC SOLVENTS; PHOTOCHROMISM; STEREOCHEMISTRY; THERMAL EFFECTS;

EID: 0035249834     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma001812i     Document Type: Article
Times cited : (148)

References (54)
  • 1
    • 0031117834 scopus 로고    scopus 로고
    • For reviews of the synthesis of helical polymers, see: (a) Pu, L. Acta Polym. 1997, 48, 116-141.
    • (1997) Acta Polym. , vol.48 , pp. 116-141
    • Pu, L.1
  • 42
    • 0343260223 scopus 로고    scopus 로고
    • The dihedral angles around the single bonds of the most preferred structure of the phenylacetylene 20-mer was computationally estimated to be 140°. See ref 6f
    • The dihedral angles around the single bonds of the most preferred structure of the phenylacetylene 20-mer was computationally estimated to be 140°. See ref 6f.
  • 43
    • 0342825364 scopus 로고    scopus 로고
    • 1 was not soluble in n-hexane
    • 1 was not soluble in n-hexane.
  • 44
    • 0343260221 scopus 로고    scopus 로고
    • 3 increased when the temperature was lowered from -20 to -30 °C. The reason for these phenomena is unclear at present. The aggregation phenomenon of polymer chains might contribute to this behavior
    • 3 increased when the temperature was lowered from -20 to -30 °C. The reason for these phenomena is unclear at present. The aggregation phenomenon of polymer chains might contribute to this behavior.
  • 45
    • 0343695850 scopus 로고    scopus 로고
    • The decrease in temperature causes the increase in the density of solvents. Therefore, the concentration of polymers should increase with decreasing temperature. We did not correct this temperature effect in the present study
    • The decrease in temperature causes the increase in the density of solvents. Therefore, the concentration of polymers should increase with decreasing temperature. We did not correct this temperature effect in the present study.
  • 46
    • 0343260220 scopus 로고    scopus 로고
    • Temperature and solvent dependences of CD effects of polymer 6 were similar tc those of polymer 5, where the intensity of CD spectra slightly increased in n-hexane but decreased in THF with decreasing temperature. See the Supporting Information
    • Temperature and solvent dependences of CD effects of polymer 6 were similar tc those of polymer 5, where the intensity of CD spectra slightly increased in n-hexane but decreased in THF with decreasing temperature. See the Supporting Information.
  • 51
    • 0343260218 scopus 로고    scopus 로고
    • The 100% and 80% chloroform solutions were transparent, but the 60% chloroform solution was somewhat translucent. Polymer 6 precipitated in the 50% chloroform solution. The intensity of CD spectra was corrected by estimating the concentrations of these samples using the voltage of photomultiplier that corresponds to the UV-vis spectra. Thus, the intensity of the CD spectra in Figure 6 is in arbitrary units and cannot be discussed precisely
    • The 100% and 80% chloroform solutions were transparent, but the 60% chloroform solution was somewhat translucent. Polymer 6 precipitated in the 50% chloroform solution. The intensity of CD spectra was corrected by estimating the concentrations of these samples using the voltage of photomultiplier that corresponds to the UV-vis spectra. Thus, the intensity of the CD spectra in Figure 6 is in arbitrary units and cannot be discussed precisely.
  • 52
    • 0343260217 scopus 로고    scopus 로고
    • The compositions of these copolymers were not determined
    • The compositions of these copolymers were not determined.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.