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Volumn 31, Issue 14, 1998, Pages 4486-4492

Complexation of borate with polyd(1-(acrylamido)-1-deoxylactitol): Dilute solution viscosity, 11B NMR, and 13C NMR studies

Author keywords

[No Author keywords available]

Indexed keywords

BORON COMPOUNDS; FREE RADICAL POLYMERIZATION; IONS; MONOMERS; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; POLYSACCHARIDES; RHEOLOGY; SOLUTIONS; VISCOSITY; VISCOSITY MEASUREMENT;

EID: 0032115953     PISSN: 00249297     EISSN: None     Source Type: Journal    
DOI: 10.1021/ma9802430     Document Type: Article
Times cited : (11)

References (33)
  • 8
    • 0342854095 scopus 로고
    • (b) 1985, 41, 3411.
    • (1985) Tetrahedron , vol.41 , pp. 3411
  • 16
    • 3843116159 scopus 로고    scopus 로고
    • University of California, Davis
    • A full account of the synthesis and characterization of PACL and the related poly(1-(methacrylamido)-1-deoxylactitol) is given in the Ph.D. dissertation of Mark E. Wilson, University of California, Davis, 1997.
    • (1997)
    • Wilson, M.E.1
  • 20
    • 3843101058 scopus 로고    scopus 로고
    • note
    • 1.5)L6 where α is the expansion factor of the polymer coil, Φ is a universal constant, M is the molecular weight, and is the unperturbed mean-square end-to-end distance of the polymer chain.
  • 23
    • 85087252233 scopus 로고    scopus 로고
    • note
    • 20 were both shown to be ∼1.4.
  • 25
    • 3843137910 scopus 로고    scopus 로고
    • note
    • The energy levels absorbed by interconverting species are blurred by ΔB according to ΔE = h/(2πτ), where τ is the lifetime of each discrete species. In NMR, this translates to a collapse of spectral structure (peak coalescence) when τ < 1/(2πΔδv), where Δδv is the chemical shift difference (in Hz) between the interconverting species. Accordingly, two borate complexes separated by 1 ppm at 96 MHz will appear as two distinct peaks when τ > 1.7 ms but will coalesce to one peak when τ < 1.6 ms. As Δδv decreases, the τ of each respective borate complex must increase in order to retain peak resolution.
  • 27
    • 3843128148 scopus 로고    scopus 로고
    • note
    • - peaks appear broader. The broadened peaks in the NMR spectra of PACL-borate are likely due from the high solution viscosity.
  • 30
    • 0010421081 scopus 로고
    • 11B peaks area and concentration, see: (a) Pizer, R. D.; Ricatto, P. J.; Tihal, C. A. Polyhedron 1993, 12, 2137. (b) Dawber, J. G.; Green, S. I. E.; Dawber, J. C.; Garail, S. J. Chem Soc., Faraday Trans, 1 1988, 84, 41.
    • (1993) Polyhedron , vol.12 , pp. 2137
    • Pizer, R.D.1    Ricatto, P.J.2    Tihal, C.A.3
  • 33
    • 3843053075 scopus 로고    scopus 로고
    • note
    • 13C NMR of PACL-borate is likely due from the high viscosity of the solution.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.