Discotic liquid crystals of transition metal complexes. Part 24 Synthesis and mesomorphism of porphyrin derivatives substituted with two or four bulky groups
Discotic liquid crystals of transition metal complexes. Part 24 Synthesis and mesomorphism of porphyrin derivatives substituted with two or four bulky groups
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DOI：
10.1039/a805715j
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发表时间：
1998
影响因子：
--
通讯作者：
K. Ohta;N. Yamaguchi;I. Yamamoto
中科院分区：
文献类型：
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作者：
K. Ohta;N. Yamaguchi;I. Yamamoto
我们合成了九种新型卟啉衍生物，1-8 和 1-Cu，被各种空间位阻基团和长柔性链取代，以研究卟啉衍生物的分子类型与所得中间相之间的关系。 4型盘状(C 12 O) 16 -TTPH 2 (1)和(C 12 O) 16 -TTPCu (1-Cu)衍生物表现出D h 柱状中间相，是内消旋卟啉无金属衍生物和铜配合物的第一个例子。在5,15位具有8个长链的5型条状(C n O) 8 -BTPH 2 [4 (n=12), 5 (n=16)]衍生物表现出D rd 柱状中间相。另一方面，具有4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 中间相，其在层内具有二维矩形结构。 (C 12 O) 4 -BPPH 2 (7) 6型衍生物也显示出D L 层状中间相。布鲁斯等人。据报道，3 型棒状卟啉衍生物显示出 S B 、SE 和 S E′ 相的棒状中间相。我们从这些类型的介晶卟啉衍生物中发现，分子结构的这种连续变化导致它们的中间相从盘状柱状转变为盘状层状，并进一步转变为棒状。
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.