Selective host–guest interactions in metal–organic frameworks via multiple hydrogen bond donor–acceptor recognition sites
Selective host–guest interactions in metal–organic frameworks via multiple hydrogen bond donor–acceptor recognition sites
复制标题
通过多个氢键供体受体识别位点在金属有机框架中选择性主客体相互作用
DOI:
10.1039/c8ta12190g
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发表时间:
2019
影响因子:
11.9
通讯作者:
J. Senker
中科院分区:
文献类型:
--
作者:
T. Wittmann;C.B.L. Tschense;L. Zappe;C. Koschnick;R. Siegel;R. Stäglich;B.V. Lotsch;J. Senker
Targeted recognition of medium sized molecules with mixed hydrogen bond units is essential for using porous materials for molecular separation, sensing and drug delivery. One promising way to achieve selectivity, is to make use of the key-and-lock principle guiding the design of hydrogen bond receptors matching the chemical signature of the target molecules. Among the class of porous materials metal–organic frameworks are particularly well suited for this purpose, as they allow for functionalizing the inner surfaces with various pending groups. Here we report the successful incorporation of 2-pyridyl urea (URPy) side groups with hydrogen bond donor–donor–acceptor (DDA) patterns into the framework MIL-101 with pores in the mesoporous range. Their influence on the sorption properties was investigated by competitive adsorption of 2-aminopyridine (2-AP) and 3-aminopyridine (3-AP) on MIL-101-URPy (Al, Cr) derivatives and comparison to the behaviour of a single donor function within MIL-101-NH2 (Al, Cr) derivatives. Grafting the coordinatively unsaturated sites at the inorganic building units (IBUs) with diethylamine, additionally allowed the adsorption at these sites to be suppressed and thus to focus on the hydrogen bond receptors. Compared to the single D sites the selectivity of 2-AP over 3-AP is enhanced by a factor of five for the DDA pending groups. Based on 15N NMR spectroscopy and DFT calculations this observation is explained by forming double hydrogen bonds between the pyridyl urea groups and the 2-AP molecules, while 3-AP exhibits a single hydrogen bond only. At the D site of MIL-101-NH2 both 2-AP and 3-AP form single hydrogen bonds only.
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影响因子:
15
作者:
T. Wittmann;Arobendo Mondal;C. B. L. Tschense;J. J. Wittmann-J.;Ottokar Klimm;Renée Siegel;B. Corzilius;Birgit Weber;M. Kaupp;J. Senker
通讯作者:
T. Wittmann;Arobendo Mondal;C. B. L. Tschense;J. J. Wittmann-J.;Ottokar Klimm;Renée Siegel;B. Corzilius;Birgit Weber;M. Kaupp;J. Senker
DOI:
10.1002/anie.201612122
发表时间:
2017-04-10
期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
作者:
Zehe CS;Hill JA;Funnell NP;Kreger K;van der Zwan KP;Goodwin AL;Schmidt HW;Senker J
通讯作者:
Senker J
DOI:
--
发表时间:
1980
期刊:
影响因子:
--
作者:
Werner Städeli;W. V. Philipsborn;A. Wick;I. Kompiš
通讯作者:
I. Kompiš
影响因子:
3.8
作者:
Morris, William;Taylor, R. E.;Garcia-Garibay, Miguel A.
通讯作者:
Garcia-Garibay, Miguel A.