Synthesis of Conjugated Polyrotaxanes

Chemistry - A European Journal

Volumn 9, Issue 24, 2003, Pages 6167-6176

  Michels, Jasper J ^a   O'Connell, Michael J ^a   Taylor, Peter N ^a   Wilson, Joanne S ^b   Cacialli, Franco ^c   Anderson, Harry L ^a  

^a UNIVERSITY OF OXFORD   (United Kingdom)

^b UNIVERSITY OF CAMBRIDGE   (United Kingdom)

^c UNIVERSITY COLLEGE LONDON   (United Kingdom)

Author keywords

Cyclodextrins; Nanotechnology; Rotaxanes; Self assembly; Supramolecular chemistry

Indexed keywords

AROMATIC HYDROCARBONS; BORON COMPOUNDS; CENTRIFUGATION; HYDROPHOBICITY; LUMINESCENCE; MOLECULAR WEIGHT; OLIGOMERS; POLYMERIZATION; SYNTHESIS (CHEMICAL);

MOLECULAR WIRES;

MOLECULAR STRUCTURE;

BETA CYCLODEXTRIN; MACROCYCLIC COMPOUND; POLYROTAXANE DERIVATIVE; ROTAXANE; UNCLASSIFIED DRUG;

ARTICLE; CHEMICAL BOND; CONJUGATION; FLUORESCENCE SPECTROSCOPY; HYDROPHOBICITY; MATRIX ASSISTED LASER DESORPTION IONIZATION TIME OF FLIGHT MASS SPECTROMETRY; MOLECULAR WEIGHT; PHOTOLUMINESCENCE; POLYMERIZATION; SOLID STATE; SUPRAMOLECULAR CHEMISTRY; SYNTHESIS; ULTRACENTRIFUGATION;

CYCLODEXTRINS; FLUORENES; LIGHT; LUMINESCENT MEASUREMENTS; MACROMOLECULAR SUBSTANCES; MODELS, MOLECULAR; MOLECULAR STRUCTURE; MOLECULAR WEIGHT; NANOTECHNOLOGY; POLYCYCLIC HYDROCARBONS, AROMATIC; POLYVINYLS; ROTAXANES; SPECTROMETRY, FLUORESCENCE; SPECTROPHOTOMETRY;

EID: 0346101634     PISSN: 09476539     EISSN: None     Source Type: Journal    
DOI: 10.1002/chem.200305245     Document Type: Article

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56. The rate of unthreading in α-cyclodextrin/poly(imine) pseudorotaxanes also decreases with decreasing chain length: G. Wenz, B. Keller, Angew. Chem. 1992, 104, 201-203; Angew. Chem. Int. Ed. Engl. 1992, 31, 197-199; W. Herrmann, B. Keller, G. Wenz, Macromolecules 1997, 30, 4966-4972.
57. The rate of unthreading in α-cyclodextrin/poly(imine) pseudorotaxanes also decreases with decreasing chain length: G. Wenz, B. Keller, Angew. Chem. 1992, 104, 201-203; Angew. Chem. Int. Ed. Engl. 1992, 31, 197-199; W. Herrmann, B. Keller, G. Wenz, Macromolecules 1997, 30, 4966-4972.
58. The rate of unthreading in α-cyclodextrin/poly(imine) pseudorotaxanes also decreases with decreasing chain length: G. Wenz, B. Keller, Angew. Chem. 1992, 104, 201-203; Angew. Chem. Int. Ed. Engl. 1992, 31, 197-199; W. Herrmann, B. Keller, G. Wenz, Macromolecules 1997, 30, 4966-4972.
59. -1, respectively. This non-ideal behaviour prevents determination of single-chain molecular dimensions; however, further analysis may allow extraction of characteristic length scales and apparent average molecular weights of aggregates.
60. a) M. Wales, J. Phys. Colloid Chem. 1948, 52, 235-246;
61. b) C. Tanford, Physical Chemistry of Macromolecules, Wiley, New York, 1961;
62. c) J. M. Creeth, R. H. Pain, Prog. Biophys. Mol. Biol. 1967, 17, 217-287;
63. d) Analytical Ultracentrifugation in Biochemistry and Polymer Science (Eds: S. E. Harding, A. J. Rowe, J. C. Horton), Royal Society of Chemistry, Cambridge, 1992;
64. e) D. Schubert, C. Tziatzios, P. Schuck, U. S. Schubert, Chem. Eur. J. 1999, 5, 1377-1383.
65. μ, instead of the buoyancy factor, (1-ν̄ρ), due to the Donnan effect (see: Budd, P.M. in Analytical Ultracentrifugation in Biochemistry and Polymer Science (Eds.: S.E. Harding, A. J. Rowe, J. C. Horton), Royal Society of Chemistry: Cambridge, 1992, pp.593-608). However, we assume variations in ν̄ across the cell at sedimentation equilibrium to be small and not to be contributing significantly to the experimental error.
66. O. Kratky, H. Leopold, H. Stabinger, Methods in Enzymology 1973, 27, 98-110.
67. w(calcd) values were obtained from the mole fraction of mono-iodide 6 used in the polymerisation reactions by numerical integration of the Flory distribution of oligomers, assuming that all aryl iodide units react at equal rate, that Suzuki coupling goes to completion and that there are no accidental termination reactions.
68. 3), which guaranteed complete deprotonation of the polymer chains. Under more acidic conditions, the quantum yields proved to be sensitive to pH, but no changes were observed above pH 8. Fluorescence quantum yields are independent of ionic strength up to 2M NaCl.
69. M. Fukuda, K. Sawada, K. Yoshino, J. Polym. Sci. Polym. Chem. Ed. J. Polym. Sci. Polym. Chem. 1993, 31, 2465-2471.
70. AUC (Table 2).