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Water Structure Recovery in Chaotropic Anion Recognition: High‐Affinity Binding of Dodecaborate Clusters to γ‐Cyclodextrin
Open accessAbstract
Dodecaborate anions of the type B 12 X 122− and B 12 X 11 Y 2− (X=H, Cl, Br, I and Y=OH, SH, NH 3+, NR 3+) form strong (K a up to 10 6 L mol−1, for B 12 Br 122−) inclusion complexes with γ‐cyclodextrin (γ‐CD). The micromolar affinities reached are the highest known for this native CD. The complexation exhibits highly negative enthalpies (up to −25 kcal mol−1) and entropies (TΔS up to −18.4 kcal mol−1, both for B 12 I 122−), which position these guests at the bottom end of the well‐known enthalpy‐entropy correlation for CDs. The high driving force can be traced back to a chaotropic effect, according to which chaotropic anions have an intrinsic affinity to hydrophobic cavities in aqueous solution. In line with this argument, salting‐in effects revealed dodecaborates as superchaotropic dianions.
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COLLINS, K. (2004) · Methods · doi:10.1016/j.ymeth.2004.03.021 · Cited by 1,091
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Cyclodextrins: Structural, Chemical, and Physical Properties, and Applications
Poulson, B. G., Alsulami, Q. A., Sharfalddin, A., El Agammy, E. F., Mouffouk, F., Emwas, A.-H., Jaremko, L., & Jaremko, M. (2021) · Polysaccharides · doi:10.3390/polysaccharides3010001 · Cited by 312
Metadata
- Authors
- Assaf, K. I., Ural, M. S., Pan, F., Georgiev, T., Simova, S., Rissanen, K., Gabel, D., & Nau, W. M.
- Venue
- Angewandte Chemie International Edition
- Publisher
- Wiley
- Published
- 2015-05-07
- Volume
- 54
- Issue
- 23
- Pages
- 6852-6856
- ISSN
- 1433-7851 (ISSN-L)
- 1521-3773
- OpenAlex
- W2161222061
- Cited by
- 297
- References
- 1
- FWCI
- 11.99
- Type
- journal article
- Language
- en
- Open access
- bronze
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- CoChat. (2026). Citation check: Water Structure Recovery in Chaotropic Anion Recognition: High‐Affinity Binding of Dodecaborate Clusters to γ‐Cyclodextrin. https://app.cochat.ai/papers/10.1002/anie.201412485
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- Assaf, K. I., Ural, M. S., Pan, F., Georgiev, T., Simova, S., Rissanen, K., Gabel, D., & Nau, W. M. (2015). Water Structure Recovery in Chaotropic Anion Recognition: High‐Affinity Binding of Dodecaborate Clusters to γ‐Cyclodextrin. Angewandte Chemie International Edition. https://doi.org/10.1002/anie.201412485
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