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Volumn 106, Issue 22, 2002, Pages 5800-5806

Origins of the sensitivity of molecular vibrations to electric fields: Carbonyl and nitrosyl stretches in model compounds and proteins

Author keywords

[No Author keywords available]

Indexed keywords

VIBRATIONAL STARK EFFECTS (VSE);

EID: 0037030845     PISSN: 10895647     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0203043     Document Type: Article
Times cited : (134)

References (52)
  • 21
    • 0003397206 scopus 로고
    • Elsevier: Amsterdam
    • ext. The local field correction is in general a tensor quantity; it is treated here as a scalar and the value of f has been estimated to be between 1.1 and 1.3 (see refs 11 and 13). More details are in Böttcher, C.J.F. Theory of Electric Polarization; Elsevier: Amsterdam, 1973; Vol. 1. Because of uncertainty in the value of f, we report the observed values of |Δμ| divided by f.
    • (1973) Theory of Electric Polarization , vol.1
    • Böttcher, C.J.F.1
  • 28
    • 0011252551 scopus 로고    scopus 로고
    • note
    • Cys 110 on the surface of human Mb was changed to alanine to improve the yield upon purification; this mutation does not perturb ligand binding properties. See ref 29.
  • 30
    • 0011174435 scopus 로고    scopus 로고
    • note
    • Soret = 160 OD/mM cm). (See ref 29.).
  • 33
    • 0011251494 scopus 로고    scopus 로고
    • note
    • anh is dominant in the VSE for acetone, MVK, and NMP (see the results).
  • 34
    • 0011219379 scopus 로고    scopus 로고
    • note
    • 12 (data not shown). It is difficult to assign the overtone band of the carbonyl stretch for NMP because of a broader band and resonance mixing with other bands.
  • 41
    • 0011171374 scopus 로고    scopus 로고
    • note
    • Because CO is not very soluble in 2MeTHF and the extinction coefficient is small, the intensity of the absorption band for free CO dissolved in frozen 2MeTHF is much lower than other vibrations observed in this paper. Because of its low absorption intensity and small |Δμ|, the free CO data is much noisier.
  • 42
    • 0011214806 scopus 로고    scopus 로고
    • note
    • Note that the observed values of |Δμ| are not corrected for the local field correction factor f. However, f is expected to be slightly larger than 1 and not to affect |Δμ| significantly. See ref 21 for details.
  • 43
    • 0011179003 scopus 로고    scopus 로고
    • note
    • The local field correction factor is assumed to be unity. See ref 21.
  • 46
    • 0011174436 scopus 로고    scopus 로고
    • note
    • Here, we are assuming that the protein electric field near the Fe-CO unit is fairly uniform, so that the magnitude and the direction of the local electric fields on C-O and Fe-C (or N-O and Fe-N) are the same.
  • 48
    • 0029078465 scopus 로고
    • anh for the Fe-C stretch could be obtained experimentally if the IR intensity of the mode were measured; however, because of its lower stretch frequency, it is difficult to observe the Fe-CO stretch by IR.
    • (1995) Proc. Natl. Acad. Sci. U.S.A. , vol.92 , pp. 9402
    • Wang1
  • 51
    • 0011180206 scopus 로고    scopus 로고
    • note
    • 15N stretch band, respectively.
  • 52
    • 0011219380 scopus 로고    scopus 로고
    • Unpublished data
    • Unpublished data.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.