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Confinement and Step‐Wise Reopening of Channels in an Artificial Cell/Inorganic Capsule: A 7 Li NMR Study
Author(s) -
Haupt Erhard T. K.,
Wontorra Claudia,
Rehder Dieter,
Merca Alice,
Müller Achim
Publication year - 2008
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200801122
Subject(s) - dimethyl sulfoxide , molybdenum , ion exchange , formamidinium , chemistry , nuclear magnetic resonance spectroscopy , ion , paramagnetism , molybdenum oxide , capsule , inorganic chemistry , materials science , iodide , organic chemistry , physics , quantum mechanics , botany , biology
Lifting the quarantine for cations : The 20 pores of a spherical molybdenum oxide based capsule, dissolved in dimethyl sulfoxide and containing encapsulated Li + ions, can be plugged completely with formamidinium cations/guests; however, it can be re‐opened stepwise by adding water. Exchange/communication between internal and external Li + and the blockage thereof have been studied by 7 Li NMR spectroscopy (see graphic), also with reference to the use of paramagnetic additives.