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Azobenzene-bridged calix[8]arenes |
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| Authors: | Grazia ML Consoli Placido Neri Giacomo Bergamini |
| Institution: | a Istituto di Chimica Biomolecolare, CNR, Via del Santuario 110, I-95028 Valverde, CT, Italy b Dipartimento di Chimica, Università di Salerno, Via Ponte don Melillo, I-84084 Fisciano, Salerno, Italy c Dipartimento di Chimica ‘G. Ciamician’, Università di Bologna, Via Selmi 2, I-40126 Bologna, Italy |
| Abstract: | An azobenzene bridge was introduced into the lower (or smaller) rim of p-tert-butylcalix8]arene (1) and 1,5-calix8]crown-3 (2) to form 1,4-singly bridged (3) and 1,5:3,7-doubly bridged (4) calix8]arene derivatives, respectively. Trans and cis isomers of conformationally rigid 4 were isolated. The quantum yields of the trans-cis photoisomerisation reactions have been measured. |
| Keywords: | Calix[8]arenes Azobenzene Photoswitch |
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