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Volumn 277, Issue 5326, 1997, Pages 673-676

Distance-dependent electron transfer in DNA hairpins

Author keywords

[No Author keywords available]

Indexed keywords

DNA;

EID: 0030820847     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.277.5326.673     Document Type: Article
Times cited : (580)

References (26)
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    • 24 February
    • E. K. Wilson, Chem. Eng. News 33 (24 February 1997); G. Taubes, Science 275, 1420 (1997); D. N. Beratan, S. Priyadarshy, S. M. Risser, Chem. Biol. 4, 3 (1997).
    • (1997) Chem. Eng. News , pp. 33
    • Wilson, E.K.1
  • 2
    • 0031054667 scopus 로고    scopus 로고
    • E. K. Wilson, Chem. Eng. News 33 (24 February 1997); G. Taubes, Science 275, 1420 (1997); D. N. Beratan, S. Priyadarshy, S. M. Risser, Chem. Biol. 4, 3 (1997).
    • (1997) Science , vol.275 , pp. 1420
    • Taubes, G.1
  • 4
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    • M. R. Arkin et al., Science 273, 475 (1996).
    • (1996) Science , vol.273 , pp. 475
    • Arkin, M.R.1
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    • C. J. Murphy et al., ibid. 262, 1025 (1993).
    • (1993) Science , vol.262 , pp. 1025
    • Murphy, C.J.1
  • 15
    • 14444280111 scopus 로고    scopus 로고
    • note
    • The hairpin structures were calculated with a modified molecular mechanics (MM2) force field within Hyperchem V5.01 (Hypercube, Waterloo, Ontario).
  • 18
    • 14444268952 scopus 로고    scopus 로고
    • note
    • Fluorescence decays were determined by means of a Photon Technology International Model LS1 photon-counting apparatus with a minimum time resolution of ∼0.3 ns.
  • 19
    • 8944252338 scopus 로고    scopus 로고
    • The samples were contained in a 2-mm path length cuvette and had absorbances of about 0.1 at 340 nm. An amplified Ti-sapphire-based laser system was used to pump an optical parametric amplifier to generate ∼300-fs, 680-nm pulses (frequency doubled with a potassium dihydrogen phosphate crystal to obtain 340-nm pulses) at a 1.36-kHz repetition rate. Samples were excited with 100 nJ of 340-nm light focused to a 250-μm spot. Absolute transient absorption changes were on the order of 0.01. The uncertainty of the kinetic data increases in the nanosecond regime. For a description of the laser system, see S. R. Greenfield, W. A. Svec, D. Gosztola, M. R. Wasielewski, J. Am. Chem. Soc. 118, 6767 (1996); S. R. Greenfield and M. R. Wasielewski, Opt. Lett. 20, 1394 (1995).
    • (1996) J. Am. Chem. Soc. , vol.118 , pp. 6767
    • Greenfield, S.R.1    Svec, W.A.2    Gosztola, D.3    Wasielewski, M.R.4
  • 20
    • 84975570635 scopus 로고
    • The samples were contained in a 2-mm path length cuvette and had absorbances of about 0.1 at 340 nm. An amplified Ti-sapphire-based laser system was used to pump an optical parametric amplifier to generate ∼300-fs, 680-nm pulses (frequency doubled with a potassium dihydrogen phosphate crystal to obtain 340-nm pulses) at a 1.36-kHz repetition rate. Samples were excited with 100 nJ of 340-nm light focused to a 250-μm spot. Absolute transient absorption changes were on the order of 0.01. The uncertainty of the kinetic data increases in the nanosecond regime. For a description of the laser system, see S. R. Greenfield, W. A. Svec, D. Gosztola, M. R. Wasielewski, J. Am. Chem. Soc. 118, 6767 (1996); S. R. Greenfield and M. R. Wasielewski, Opt. Lett. 20, 1394 (1995).
    • (1995) Opt. Lett. , vol.20 , pp. 1394
    • Greenfield, S.R.1    Wasielewski, M.R.2
  • 21
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    • The stilbenedicarboxamide singlet state reduction potential is estimated to be ∼1.5 V from the sum of its singlet energy (3.4 V) and reduction potential in dimethyl sulfoxide solution [-1.9 V versus standard calomel electrode (SCE)] (15). The oxidation potential of dimethylaniline is 0.78 V versus SCE [D. Rehm and A. Weller, Isr. J. Chem. 8, 259 (1970)].
    • (1970) Isr. J. Chem. , vol.8 , pp. 259
    • Rehm, D.1    Weller, A.2
  • 26
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    • note
    • Supported by the Division of Chemical Sciences, Office of Basic Energy Sciences, U. S. Department of Energy, under contracts DE-FG02-96ER14604 (to F.D.L.) and W-31-109-ENG-38 (to M.R.W.). We thank J.-S. Yang for the measurement of fluorescence decays.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.