期刊
CHEMISTRY-A EUROPEAN JOURNAL
卷 20, 期 22, 页码 6659-6664出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201402216
关键词
confined water; dewetting; hydrophobic effect; polyoxometalates; water repellency
资金
- Deutsche Forschungsgemeinschaft
- ERC (Brussels)
- DAAD
The hydrophobic effect plays a major role in a variety of important phenomena in chemistry, materials science and biology, for instance in protein folding and protein-ligand interactions. Studiesperformed within cavities of the unique metal oxide based porous capsules of the type {(pentagon)(12)(linker)(30)}{(W)W-5}(12){Mo-2(ligand)}(30) with different acetate/water ligand ratioshave provided unprecedented results revealing segregation/repellency of the encapsulated water from the internal hydrophobic ligand walls of the capsules, while the disordered water molecules, interacting strongly with each other via hydrogen bonding, form in all investigated cases the same type of spherical shell. The present results can be (formally) comparedbut only regarding the repellency effectwith the amazing action of the (super)hydrophobic Lotus (Nelumbo) leaves, which are self-cleaning based on water repellency resulting in the formation of water droplets picking up dirt. The present results were obtained by constructing deliberately suitable hydrophobic interiors within the mentioned capsules.
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