Proximal dicarboxylatocalix[4]arene 4 and distal dicarboxylatocalix[6]arene 5 have been synthesised in good yields and their complexation abilities towards dicationic paraquat guest 3 have been studied by NMR spectroscopy. Both hosts are able to complex 3 through an induced-fit mechanism, which originates from the conformational flexibility of calixarene macrocycle. A pH-dependent switching system was realised in which guest inclusion can be controlled through an acid/base external stimulus.
Paraquat guest-induced conformational templation of dicarboxylatocalixarenes
PIERRO, TERESA;GAETA, CARMINE;NERI, Placido
2010-01-01
Abstract
Proximal dicarboxylatocalix[4]arene 4 and distal dicarboxylatocalix[6]arene 5 have been synthesised in good yields and their complexation abilities towards dicationic paraquat guest 3 have been studied by NMR spectroscopy. Both hosts are able to complex 3 through an induced-fit mechanism, which originates from the conformational flexibility of calixarene macrocycle. A pH-dependent switching system was realised in which guest inclusion can be controlled through an acid/base external stimulus.File in questo prodotto:
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