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The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests
The rationalization of non‐covalent binding trends is both of fundamental interest and provides new design concepts for biomimetic molecular systems. Cucurbit[n]urils (CBn) are known for a long time as the strongest synthetic binders for a wide range of (bio)organic compounds in water. However, thei...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9401061/ https://www.ncbi.nlm.nih.gov/pubmed/35612260 http://dx.doi.org/10.1002/chem.202200529 |
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author | Grimm, Laura M. Spicher, Sebastian Tkachenko, Boryslav Schreiner, Peter R. Grimme, Stefan Biedermann, Frank |
author_facet | Grimm, Laura M. Spicher, Sebastian Tkachenko, Boryslav Schreiner, Peter R. Grimme, Stefan Biedermann, Frank |
author_sort | Grimm, Laura M. |
collection | PubMed |
description | The rationalization of non‐covalent binding trends is both of fundamental interest and provides new design concepts for biomimetic molecular systems. Cucurbit[n]urils (CBn) are known for a long time as the strongest synthetic binders for a wide range of (bio)organic compounds in water. However, their host‐guest binding mechanism remains ambiguous despite their symmetric and simple macrocyclic structure and the wealth of literature reports. We herein report experimental thermodynamic binding parameters (ΔG, ΔH, TΔS) for CB7 and CB8 with a set of hydroxylated adamantanes, di‐, and triamantanes as uncharged, rigid, and spherical/ellipsoidal guests. Binding geometries and binding energy decomposition were obtained from high‐level theory computations. This study reveals that neither London dispersion interactions, nor electronic energies or entropic factors are decisive, selectivity‐controlling factors for CBn complexes. In contrast, peculiar host‐related solvation effects were identified as the major factor for rationalizing the unique behavior and record‐affinity characteristics of cucurbit[n]urils. |
format | Online Article Text |
id | pubmed-9401061 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-94010612022-08-26 The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests Grimm, Laura M. Spicher, Sebastian Tkachenko, Boryslav Schreiner, Peter R. Grimme, Stefan Biedermann, Frank Chemistry Research Articles The rationalization of non‐covalent binding trends is both of fundamental interest and provides new design concepts for biomimetic molecular systems. Cucurbit[n]urils (CBn) are known for a long time as the strongest synthetic binders for a wide range of (bio)organic compounds in water. However, their host‐guest binding mechanism remains ambiguous despite their symmetric and simple macrocyclic structure and the wealth of literature reports. We herein report experimental thermodynamic binding parameters (ΔG, ΔH, TΔS) for CB7 and CB8 with a set of hydroxylated adamantanes, di‐, and triamantanes as uncharged, rigid, and spherical/ellipsoidal guests. Binding geometries and binding energy decomposition were obtained from high‐level theory computations. This study reveals that neither London dispersion interactions, nor electronic energies or entropic factors are decisive, selectivity‐controlling factors for CBn complexes. In contrast, peculiar host‐related solvation effects were identified as the major factor for rationalizing the unique behavior and record‐affinity characteristics of cucurbit[n]urils. John Wiley and Sons Inc. 2022-05-25 2022-07-06 /pmc/articles/PMC9401061/ /pubmed/35612260 http://dx.doi.org/10.1002/chem.202200529 Text en © 2022 The Authors. Chemistry - A European Journal published by Wiley-VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Articles Grimm, Laura M. Spicher, Sebastian Tkachenko, Boryslav Schreiner, Peter R. Grimme, Stefan Biedermann, Frank The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests |
title | The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests |
title_full | The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests |
title_fullStr | The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests |
title_full_unstemmed | The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests |
title_short | The Role of Packing, Dispersion, Electrostatics, and Solvation in High‐Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests |
title_sort | role of packing, dispersion, electrostatics, and solvation in high‐affinity complexes of cucurbit[n]urils with uncharged polar guests |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9401061/ https://www.ncbi.nlm.nih.gov/pubmed/35612260 http://dx.doi.org/10.1002/chem.202200529 |
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