Surface Recognition of Dipolar Molecules Entering Channels of the Organic Zeolite Tris(o-phenylenedioxy)cyclotriphosphazene

Macroscopically polar crystals of an organic zeolite, tris(o-phenylenedioxy)cyclotriphosphazene, are obtained by partial guest exchange of included THF molecules with nonlinear optical molecules, which enter the channels via a mechanism of surface recognition (4-amino-4′-nitrobiphenyl partially (left) and fully (right) stained crystals are shown in the Figure).