C.P.-D.D.-M.A.S. 13C-N.M.R. investigations of anhydrous and hydrated cyclomalto-oligosaccharides: The role of water of hydration |
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| Affiliation: | 1. Faculty of Engineering, University of Kragujevac, Serbia;2. Bioengineering Research and Development Center Kragujevac, Serbia;3. Department of Urology, Clinic of Urology and Nephrology, Clinical Centre Kragujevac, Serbia;4. Department of Surgery, General Hospital Gornji Milanovac, Serbia;5. Center for Data Analytics and Biomedical Informatics, Temple University, USA;1. The Key Laboratory of Resources and Environmental Systems Optimization, Ministry of Education, Beijing 102206, China;2. School of Environmental Science and Engineering, North China Electric Power University, Baoding 071003, China;1. Department of Physics and Engineering, University of Zululand, Private Bag X1001, Kwadlangezwa 3886, South Africa;2. Interdisciplinary Laboratories for Advanced Materials Physics and Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, via dei Musei 41, I-25121 Brescia, Italy;3. Istituto Officina dei Materiali-CNR, Laboratorio TASC, s.s. 14, km 163.4, I-34149 Trieste, Italy;4. Elettra—Sincrotrone Trieste S.C.p.A, s.s. 14, km 163.4, I-34149 Trieste, Italy;5. Department of Molecular Sciences and Nanosystems, Ca’ Foscari University of Venice, via Torino 155, 30170 Venezia-Mestre, Italy;6. Department of Physics, University of Johannesburg, P.O. Box 524, Auckland Park, Johannesburg 2006, South Africa;2. IRCAD, Strasbourg, France;1. Instituto de Micro y Nanotecnología, IMN-CNM, CSIC (CEI UAM + CSIC), Isaac Newton 8, E-28760, Tres Cantos, Madrid, Spain;2. Departamento de Electrocerámica, Instituto de Cerámica y Vidrio, CSIC, Kelsen 5, E-28049, Madrid, Spain;3. Departamento de Física de Materiales, Universidad Complutense de Madrid, Ciudad Universitaria s/n, E-28040, Madrid, Spain |
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| Abstract: | Hydrated and anhydrous cyclomaltohexaose, cyclomaltoheptaose, and cyclomalto-octaose (cyclodextrins) have been investigated by the c.p.-d.d.-m.a.s. 13C-n.m.r. technique. The chemical shifts of the signals of C-1 and C-6 provide information about conformation and the results agree fairly well with the earlier scattering data on hydrated systems, but some discrepancies have been found for cyclomaltohexaose. Th conformation of the macro-rings seems to be determined by the hydration water. The unique role of water in forming crystals of cyclomalto-oligosaccharides is demonstrated. |
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