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@INPROCEEDINGS{Niether:830383,
author = {Niether, Doreen and Kawaguchi, Tsubasa and Hovancova, Jana
and Eguchi, Kazuja and Dhont, Jan K.G. and Kita, Rio and
Wiegand, Simone},
title = {{T}hermophoresis of cyclodextrins and
cyclodextrin-drug-complexes},
reportid = {FZJ-2017-03936},
year = {2017},
abstract = {The behaviour of biomolecules in a temperature gradient,
known as thermodiffusion, changes when a ligand binds. In
recent years, this effect has been used to gain detailed
information on binding dynamics, although the
physicochemical processes are still unclear [1]. We focused
on the question how the hydration layer affects
thermodiffusion when it changes due to complex formation. As
model system we used cyclodextrin complexes with
acetylsalicylic acid (Aspirin). Cyclodextrins are cyclic
oligosaccharides that show a strong tendency towards complex
formation. For that reason they are interesting as drug
delivery systems [2,3.] The thermodiffusion of different
cyclodextrins [4] and their aspirin complexes was
investigated in a temperature range from 10 to 50°C by
infrared thermal diffusion forced Rayleigh scattering
(IR-TDFRS). Additionally, NMR measurements were performed at
25 and 60°C to obtain information about stability and
structure of the complexes. We found that all cyclodextrins
show a stronger diffusion towards the cold side when Aspirin
binds. This behaviour suggests a weaker interaction with the
surrounding water that could be explained by hydrogen bond
formation inside the complex.[1] M. Jerabek-Willemsen, T.
André, W. Wanner, H. Roth, S. Duhr, P. Baaske, and D.
Breitsprecher, J. Mol. Struct. (2014).[2] E. Del Valle,
Process Biochemistry 39, 1033 (2004).[3] J. Szejtli, Drug
Invest. 2, 11 (1990).[4] K. Eguchi, D. Niether, S. Wiegand,
and R. Kita, Eur.Phys. J. E 39, 16086 (2016).},
month = {May},
date = {2017-05-25},
organization = {116th General Assembly of the German
Bunsen Society for Physical Chemistry,
Kaiserslautern (Germany), 25 May 2017 -
27 May 2017},
subtyp = {Invited},
cin = {ICS-3},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/830383},
}