Spectroscopic insight into supramolecular assemblies of boric acid derivatives and β-cyclodextrin

被引:25
作者
Kasprzak, Artur [1 ]
Borys, Krzysztof M. [1 ]
Molchanov, Sergey [1 ]
Adamczyk-Wozniak, Agnieszka [1 ]
机构
[1] Warsaw Univ Technol, Fac Chem, Noakowskiego 3, PL-00664 Warsaw, Poland
关键词
beta-Cyclodextrin; Ferroceneboronic; Phenylboronic; Organoboron; Boric; INCLUSION COMPLEXES; ALPHA-CYCLODEXTRIN; HYDROXY PROTONS; METHYL-ORANGE; NMR; MECHANOCHEMISTRY; DISSOLUTION; RECOGNITION; BEHAVIOR; H-1-NMR;
D O I
10.1016/j.carbpol.2018.06.085
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Interactions of select boric acid derivatives with beta-cyclodextrin were investigated. All products were obtained employing the grinding-induced mechanochemical approach. It was found that phenylboronic acid, benzoxaborole and boric acid form non-covalent, hydrogen bonding-based systems with beta-cyclodextrin, whereas catechol and pinacol esters of phenylboronic acid as well as ferroceneboronic acid form host-guest inclusion complexes. The interactions were probed using spectroscopic methods: H-1 NMR, H-1-H-1 ROESY NMR, H-1 DOSY NMR, FT-IR. Association constant values were evaluated by H-1 DOSY NMR. The highest association constant was found for boric acid (117.5 +/- 2.5 M-1), whilst the lowest for benzoxaborole (14.8 +/- 0.3 M-1). The study shows the influence of boron compound structure on the nature of the assembly formed with beta-cyclodextrin, laying up the basis for future work with such supramolecular systems.
引用
收藏
页码:294 / 301
页数:8
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