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An oriented handcuff rotaxane
Roberta Ciao1, Carmen Talotta, Carmine Gaeta
1Dipartimento di Chimica e Biologia and NANO_MATES Research Center, Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy, and Dipartimento di Farmacia, Università di Salerno , Via Giovanni Paolo II 132, I-84084 Fisciano (Salerno), Italy.
Abstract:
The first example of an oriented handcuff rotaxane has been obtained by through-the-annulus threading of a double-calix[6]arene system with a bis-ammonium axle. The relative orientation of the two calix-wheels can be predefined by exploiting the "endo-alkyl rule" which controls the directionality of the threading of alkylbenzylammonium axles with calixarene macrocycles.
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