N. Lahrahar et al., MOLECULAR, CRYSTAL-STRUCTURE AND FLUORESCENCE EMISSION PROPERTIES OF DIPROTONATED TRAOXA-4,13-DIAZA[16.8(4,13)](9,10)ANTHRACENOPHANE (A(33).2H(+)), Acta crystallographica. Section C, Crystal structure communications, 52, 1996, pp. 113-116
7,10,19,22-Tetraoxa-4,13-diaza[16.8(4,13)] (9, 10)anthracenophane.2HCl
O(4).C6H5CH3, C32H44N2O4.2HClO(4).C7H8, is a diprotonated form of a mo
lecular receptor described previously and the homologue of A(22).2H(+)
is also described. The present A(33).2H(+) compound crystallizes with
one molecule of solvent (toluene) and the N+-H bonds are oriented out
side the empty cavity towards the ClO4 anions. The single-crystal fluo
rescence spectra of the free base (A(33)) and of the title compound ar
e reported.