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Volumn 14, Issue 9, 2008, Pages 2904-2908

Parking and restarting a molecular shuttle in situ

Author keywords

Host guest systems; Molecular machines; Molecular shuttles; Molecular switches; Rotaxanes

Indexed keywords

ACIDS;

EID: 53849122698     PISSN: 09476539     EISSN: 15213765     Source Type: Journal    
DOI: 10.1002/chem.200701854     Document Type: Article
Times cited : (37)

References (40)
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    • The dynamic data were estimated by using the coalescence method; see
    • The dynamic data were estimated by using the coalescence method; see: I. O. Sutherland, Annu. Rep. NMR Spcctrosc. 1971, 4, 71-235.
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    • Sutherland, I.O.1
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    • It has been demonstrated that the shuttling process could be initiated by the addition of a polar solvent that disrupts the hydrogenbonding interactions between the macrocycle and the dumbbell component of a glycylglycine rolaxane in a less-polar solvent, but this procedure seems to be irreversible; see: D. A. Leigh, A. Murphy, M. J. Smart, A. M. Z. Slawin. Angew. Chem. 1997, 109, 752-756;
    • It has been demonstrated that the shuttling process could be initiated by the addition of a polar solvent that disrupts the hydrogenbonding interactions between the macrocycle and the dumbbell component of a glycylglycine rolaxane in a less-polar solvent, but this procedure seems to be irreversible; see: D. A. Leigh, A. Murphy, M. J. Smart, A. M. Z. Slawin. Angew. Chem. 1997, 109, 752-756;
  • 17
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    • there are several examples of methods to covalently block the movement of a macrocycle along a rotaxane's thread;
    • a) A. S. Lane, D. A. Leigh, A. Murphy, J. Am. Chem. Soc. 1997, 119, 11092-11093; there are several examples of methods to covalently block the movement of a macrocycle along a rotaxane's thread;
    • (1997) J. Am. Chem. Soc , vol.119 , pp. 11092-11093
    • Lane, A.S.1    Leigh, D.A.2    Murphy, A.3
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    • 1 ions takes more than 10 min to perform; see reference [6].
    • 1 ions takes more than 10 min to perform; see reference [6].
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    • The relationship ΔGc≠, RTcln (kch/kRTc, in which R, h, and kB correspond to the gas, Planck, and Boltzmann constants, respectively. was used to obtain values for the free energy of activation for shuttling (ΔG c≠) at the coalescence temperature Tc, By using the tert-butyl groups as probe protons, the values of Δv, Tc, and kc were determined to be 44.8 Hz, 264 K. and 100 s 1, respectively, which corresponds to a ΔGc ≠ value of 13.0 kcal mol 1 and is quite close to the value we obtained by using proton H1, as the probe
    • 1 and is quite close to the value we obtained by using proton H1, as the probe.
  • 31
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    • Crystal data for 3·H2O·2PF6: [C 74H94O7N4][PF6] 2; Mt= 1441.47: triclinic; space group P1̄; a, 12.1307(2, b, 12.8642(1, c, 27.3374(4) Å V, 3867.49(9) Å3; ρcated, 1.238 g cm 3, μ(MoKα, 0.137 mm-1; T=295(2) K; colorless prisms: 13556 independent measured reflections; F2 refinement; R 1, 0.0988, wR2, 0.2862
    • 2 = 0.2862.
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    • -1 for the complexation between BPX26C6 and 2,2′-bipyridinium bis(hexafluorophosphate) in the same solvent; see: N.-C. Chen, P.-Y. Huang, C.-C. Lai, Y.-H. Liu, S.-M. Peng, S.-H. Chiu, Chem. Commun. 2007, 4122-4124.
    • -1 for the complexation between BPX26C6 and 2,2′-bipyridinium bis(hexafluorophosphate) in the same solvent; see: N.-C. Chen, P.-Y. Huang, C.-C. Lai, Y.-H. Liu, S.-M. Peng, S.-H. Chiu, Chem. Commun. 2007, 4122-4124.
  • 33
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    • Several nondegenerate [2]rotaxanes that behave as acid/base-conlrolled molecular switches are known; see: a J. W. Lee, K. Kim, K. Kim. Chem. Commun. 2001, 1042-1043;
    • Several nondegenerate [2]rotaxanes that behave as acid/base-conlrolled molecular switches are known; see: a) J. W. Lee, K. Kim, K. Kim. Chem. Commun. 2001, 1042-1043;
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    • 6 does not dimerize under these conditions.
    • 6 does not dimerize under these conditions.
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    • 2+ ions by TPEN, see: a E. Kawabata, K. Kikuchi, Y. Urano, H. Kojima, A. Odani, T Nagano, J. Am. Chem. Soc. 2005, 127, 818-819;
    • 2+ ions by TPEN, see: a) E. Kawabata, K. Kikuchi, Y. Urano, H. Kojima, A. Odani, T Nagano, J. Am. Chem. Soc. 2005, 127, 818-819;
  • 39
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    • The use of metal coordination to block the passage of the macrocycle in a rotaxane has been reported previously; see: D. A. Leigh, P. J. Lusby, A. M. Z. Slawin, D. B. Walker, Angew. Chem. 2005, 117, 4633-4640;
    • The use of metal coordination to block the passage of the macrocycle in a rotaxane has been reported previously; see: D. A. Leigh, P. J. Lusby, A. M. Z. Slawin, D. B. Walker, Angew. Chem. 2005, 117, 4633-4640;
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* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.