Table 1.

Summary of structural features, thermal properties, and P–E hysteresis of CnSS, CnSeS, and C6TP.

Compound	Structure of aromatic core	Phase-transition and melting temperatured (K)				P-E response
		S1–S2	S2–M1	S1– Colh	S2/M1/CoIh–I
C6SSa	Bowl	315	–	–	395	Hysteresis
C8SSa	Bowl	299	–	–	368	Hysteresis
C10SSb	Bowl	280	–	–	359	Hysteresis
C16SSc	Bowl	315	330	–	345	Hysteresis
C4SeSb	Planar/bowld	303	–	–	353	Linear
C6TPc	Planar	–	–	343	371	Linear

^aObtained at heating process of the DSC analysis.

^bAbsense of fluid behavior in S1 and S2 phases.

^cLiquid crystalline state at M1 or CoI_h phase.

^dStructure of triselenasumanene core of C4SeS obtained by crystallographic analysis is bowl-shaped, whereas the optimized structure obtained by the theoretical calculation is planar.