Abstract
To investigate the thermal behavior of a mesogen in confined geometry, a cationic mesogen (Az; NO2–C6H4–N=N–C6H4–O–(CH2)6–N+C2H5(C2H4OH)2) was incorporated into the interlayers of four clay mineral and synthetic swelling mica hosts. Incorporation caused increase in the basal spacings of which two types were observed, a larger (ca. 3.4 nm) and a smaller one (ca. 2.1–2.4 nm). Interdigitated antiparallel arrangement of the guest with its long axis perpendicular to the layer was assumed for the larger basal spacing, and inclined arrangement was for assumed the smaller one. Smectic behavior was exhibited only for the guest molecules in the interdigitated antiparallel arrangement.
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