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New Scaffolds for Supramolecular Chemistry: Upper‐Rim Fully Tethered 5‐Methyleneureido‐5′‐methyl‐2,2′‐bipyridyl Cyclodextrins
Author(s) -
Heck Romain,
Dumarcay Florence,
Marsura Alain
Publication year - 2002
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 - 10.1002/1521-3765(20020603)8:11<2438::aid-chem2438>3.0.co;2-a
Subject(s) - lanthanide , intramolecular force , chemistry , supramolecular chemistry , phosphine , yield (engineering) , allosteric regulation , ion , imide , metal ions in aqueous solution , photochemistry , stereochemistry , polymer chemistry , molecule , materials science , organic chemistry , catalysis , metallurgy , enzyme
Abstract Seven upper‐rim fully tethered cyclodextrins (URFT‐CDs) have been synthesised in a good average coupling yield using the one‐step “phosphine imide” approach and their metal complexation behaviour with lanthanides and transition metals was explored. We observed that the A‐TE‐E light conversion process (antennae effect) occurs in the URFT‐CD lanthanide complexes. A molecular redox switch based on the corresponding iron complexes is also reported. A reversible intramolecular translocation of the Fe II and Fe III ions, between two distinct binding cavities has been monitored spectroscopically and achieved by chemical triggering. Finally, a negative allosteric control of ion recognition through the formation of a CD pseudocryptand is discussed.