We have synthesized nine novel porphyrin derivatives, 1-8 and 1-Cu, substituted with various steric hindrance groups and long flexible chains in order to investigate the relationship between the molecular type of porphyrin derivatives and the resulting mesophase. Type 4 disc-like (C
12
O)
16
-TTPH
2
(1) and (C
12
O)
16
-TTPCu (1-Cu) derivatives exhibit D
h
columnar mesophases, which are the first examples of meso-substituted porphyrin metal-free derivatives and copper complexes. Type 5 strip-like (C
n
O)
8
-BTPH
2
[4 (n=12), 5 (n=16)] derivatives having eight long chains at the 5,15-positions exhibit D
rd
columnar mesophases. On the other hand, the type 5 (C
12
O)
4
-BTPH
2
(6) derivative having four long chains exhibits discotic lamellar D
L.rec1
and D
L.rec2
mesophases which have a two-dimensional rectangular structure within the layer. The (C
12
O)
4
-BPPH
2
(7) type 6 derivative also shows a D
L
lamellar mesophase. Bruce et al. reported that type 3 rod-like porphyrin derivatives show calamitic mesophases of S
B
, S
E
and S
E′
phases. We revealed from these types of mesogenic porphyrin derivatives that such a successive change of the molecular structures causes their mesophases to change from discotic columnar to discotic lamellar, and further to calamitic.
我们合成了九种新型
卟啉衍
生物 1-8 和 1-Cu,这些衍
生物被各种立体阻碍基团和长柔性链取代,目的是研究
卟啉衍
生物的分子类型与所产生的介相之间的关系。第 4 类圆盘状(C 12 O)16 -
TTPH 2 (1) 和(C 12 O)16 -
TTPCu (1-Cu) 衍
生物表现出 D h 柱状介相,这是介观取代的无
金属
卟啉衍
生物和
铜配合物的第一个实例。5 型条状(C n O)8 -BTPH 2 [4 (n=12),5 (n=16)]衍
生物在 5、15 位有八条长链,表现出 D rd 柱状介相。另一方面,具有四条长链的 5 型 (C 12 O) 4 -BTPH 2 (6) 衍
生物表现出盘状层状 D L.rec1 和 D L.rec2 介相,在层内具有二维矩形结构。(C 12 O) 4 -
BPPH 2 (7) 型 6 衍
生物也显示出 D L 层状介相。Bruce 等人报告说,3 型棒状
卟啉衍
生物显示出 S B、S E 和 S E′相的盏焰介相。我们从这些类型的介生
卟啉衍
生物中发现,分子结构的这种连续变化导致它们的介相从盘状柱状变为盘状片状,并进一步变为盏焰色。