SYNTHESIS, X-RAY STRUCTURE AND PHOTOPHYSICAL PROPERTIES OF A PYRIDO DITHIA BRIDGED ANTHRACENOPHANE

A dithia pyrido bridged (9,10) anthracenophane (compound 7) was design ed as a luminescent chemosensor for soft cation recognition. The synth esis and the X-ray structure are described. The pyridine ring is tilte d by 13 degrees with respect to the anthracene ring and the nitrogen a tom lone pair is approximate to 2.7 Angstrom from the anthracene ring centre. This may explain the significant perturbation of the UV spectr um compared to 9,10-di-n-propylanthracene, a reference molecule. The s tructured fluorescence spectrum reflects the absorption characteristic s. Compound 7 displays a non fluorescent charge-transfer complex with silver (I).