381165-06-6Relevant articles and documents
Phenothiazine - Bipyridinium cyclophanes
Bauer, Helmut,Stier, Falk,Petry, Christoph,Knorr, Andreas,Stadler, Christian,Staab, Heinz A.
, p. 3255 - 3278 (2007/10/03)
The syntheses of oligooxa[8.8]-, -[11.11]-, -[14,14]-, -[17.17]and -[20.20]cyclophanes with phenothiazine as donor and bipyridinium dication as acceptor are described, together with preparations of the corresponding oligomethylene-[3.3]and -[4.4]cyclophanes. While the large [8.8]-, [11.11]- and [14.14]cyclophanes in particular show well-defined charge-transfer (CT) absorption maxima, the smallest [3.3]cyclophane does not exhibit any CT effect. For the large cyclophanes, a preferred conformation with crossed donor and acceptor units is proposed. The fluorescence quenching and electrochemical behaviour of all phenothiazine - bipyridinium cyclophanes is discussed.