AMMONIUM REDOX-RESPONSIVE RECEPTORS CONTAINING MULTIPLE FERROCENE AND QUINONE REDOX-ACTIVE CENTERS ATTACHED TO DI-AZA AND TRI-AZA CROWN-ETHER MACROCYCLES (JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS, 1993)

(untitled) - Beer, P; Crowe, D; Ogden, M; Drew, M; Main, B