Flying-seed-like mesogens 6: Synthesis and mesomorphism of phthalocyanine derivatives substituted by pentafluorosulfanylphenoxy group

Discotic liquid crystals of transition metal complexes 52: Synthesis and homeotropic alignment of liquid crystalline phthalocyanine-fullerene dyad bridged by vanillin

“…Therefore, presence of the methoxy group may be a key point on the homeotropic alignment. We have previously reported that a novel type of flying-seed-like liquid crystals show mesomorphism despite absence of long chains [36][37][38][39][40][41]. For example, (m-CH 3 OPhO) 8 PcCu (8) in Fig.…”

Flying-seed-like liquid crystals 7: Synthesis and mesomorphism of novel octakis(m-chloropyridyloxy) phthalocyanato copper(II) complexes

“…[1][2][3][4][5][6] Very recently, we have synthesized novel phthalocyanine derivatives, [(x-C 1 )PhO] 8 PcCu (x = p, o, m: 1a-c in Figure 1), substituted by eight phenoxy groups having methoxy groups on their para, ortho, or meta positions. 4 As a result, [(p- have revealed that mesomorphism could be induced by these novel bulky substituents instead of using long alkyl chains, and that appearance of the mesomorphism was greatly affected by the position of methoxy groups.…”

Phthalocyanine-based discotic liquid crystals switching from a molten alkyl chain type to a flying-seed-like type

“…[12][13][14] ; [B] dependence of liquid crystallinity on the substitution position for phthalocyanine-based compounds, 2. [16][17][18] In 2009, Usol'tseva et al, reported a phthalocyanine derivative (1p in Figure 1A) substituted by four p-(triphenylmethyl)phenoxy groups shows a Col h phase, although it has no long alkyl chains in the periphery. 12,13 In their reports, the mesophase was identified only by polarizing microscopic observation (POM), without the X-ray diffraction measurement.…”

“…In the past five years, we have explored several novel flying-seed-like liquid crystals. [14][15][16][17][18][19] Figure 1B shows our developed flying-seed-like phthalocyanine derivatives substituted by bulky substituents to induce mesomorphism. As can be seen from this figure, the non-substituted phenoxy group, the 50 p-methoxyphenoxy group and p-pentafluorosulfanylphenoxy group cannot induce mesomorphism.…”

“…As can be seen from this figure, the non-substituted phenoxy group, the 50 p-methoxyphenoxy group and p-pentafluorosulfanylphenoxy group cannot induce mesomorphism. 17,18 On the other hand, the compounds having a methoxy group at the ortho position or the meta position show mesomorphism. 17 Interestingly, when a methoxy group is introduced at least at the meta position in the 55 phenoxy group, these compounds tend to show mesomorphism.…”