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Abstract
The silver ion–based supramolecular adducts bearing long alkyl chains (Cn-Phen: n (carbon number of alkyl chain) = 12, 14, 16, 18) were prepared by reaction of phenazine and silver alkylsulfonates. Their liquid crystalline behavior was studied by differential scanning calorimetry, polarizing microscopy, and temperature-dependent X-ray diffraction techniques. Each of the adducts exhibits three mesophases with layer structures; an unidentified smectic phase (Sx), smectic C (SC), and smectic A (SA) phases. Furthermore, it was found that each of the layers has a two-dimensional silver ion sheet sandwiched above and below by two aliphatic sheets.
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ACKNOWLEDGMENT
This work was partially supported by the Grant-in-Aid for Scientific Research (No. 13750819 and No. 19022011) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan.
Notes
Phase nomenclature: Cr = crystal and M = mesophase.
M1(Sx) = unidentified smectic mesophase + Ag. rec(C2/m); M2 = Smectic C + Ag. rec(C2/m); M3 = Smectic A + Ag.rec(C2/m).
#: possible stucking distance of phenanine cores.