Binding affinity of aniline-substituted dodecaborates to cyclodextrins

A new set of hybrid guest molecules bearing organic and inorganic residues have been studied for their recognition by cyclodextrins in aqueous solution. The guest molecules consist of nitroanilines linked through their amino group to the dodecahydrido- -dodecaborate cluster B H , which serves as an...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2022-02, Vol.58 (14), p.2363-2366
Main Authors: Marei, Tarek, Al-Joumhawy, Mahmoud K, Alnajjar, Mohammad A, Nau, Werner M, Assaf, Khaleel I, Gabel, Detlef
Format: Article
Language:English
Subjects:
Absorption spectra
Affinity
Aniline
Aqueous solutions
Charge transfer
Clusters
Cyclodextrins
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Summary:A new set of hybrid guest molecules bearing organic and inorganic residues have been studied for their recognition by cyclodextrins in aqueous solution. The guest molecules consist of nitroanilines linked through their amino group to the dodecahydrido- -dodecaborate cluster B H , which serves as an anchor group. They show sizable affinity to cyclodextrins, and unexpected photophysical properties, with a very strong and low-energy charge-transfer band. The dodecaborate cluster increases the p of the anilines by 5.0 to 5.7 pH units, and the deprotonated forms of the - and -nitroaniline derivatives show strong charge transfer absorption bands in the visible part of the spectrum.
ISSN:1359-7345
1364-548X
DOI:10.1039/d1cc06524f