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2021-06-18T13:46:19+09:00
2021-06-18T13:46:19+09:00
2021-06-18T13:46:19+09:00
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Ritsumeikan Univ.KO-590
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1 g
10 36 574.5 780 re
f
BT
0 g
/TT0 1 Tf
14.25 0 0 14.25 36.5787 788.25 Tm
(Relationship Between Crystal Structure and Liquid Crystallinity of 1,1'-\
Disubstituted)Tj
13.587 -1.211 Td
(Ferrocene Derivatives)Tj
/TT1 1 Tf
12 0 0 12 489.6953 742.5 Tm
(Takashi Okabe)Tj
-37.1 -2.313 Td
(Single crystal X-ray structure analysis of 1,1'-disubstituted ferrocene \
derivative, 1,1'-bis[)Tj
/C2_0 1 Tf
35.517 0 Td
<0226>Tj
/TT1 1 Tf
(-[4-\(4-)Tj
-36.517 -1.5 Td
(methoxyphenoxycarbonyl\)phenoxy]alkoxycarbonyl]ferrocene \(abbrevia- ted\
hereafter as bMAF-n, n=2)Tj
/C0_0 1 Tf
41.409 -0.187 Td
<0299>Tj
/TT1 1 Tf
1 0.187 Td
(12,)Tj
-42.409 -1.5 Td
(where n is the number of carbon atoms in the methylene unit\) has been c\
arried out in this study. Crystal)Tj
0 -1.5 TD
(structures of bMAF-3, 5, 9 and 10 were determined, and relationship betw\
een molecular structure and liquid)Tj
T*
(crystallinity of bMAF-n were discussed with the results of bMAF-2, 6 and\
8. The molecular structure of)Tj
T*
(bMAF-n is categorized into three groups by the location of the substitue\
nts. )Tj
/C0_0 1 Tf
30.522 -0.187 Td
<1D83>Tj
/TT1 1 Tf
1 0.187 Td
(U-shaped structure )Tj
/C0_0 1 Tf
7.831 -0.187 Td
<1D84>Tj
/TT1 1 Tf
1 0.187 Td
(S-shaped)Tj
-40.353 -1.5 Td
(structure )Tj
/C0_0 1 Tf
3.749 0 Td
<1D85>Tj
/TT1 1 Tf
(Z-shaped structure)Tj
-3.749 -1.5 Td
(The molecular structures of bMAF-3, 8, 9 and 10 adopted the U-shaped con\
formation in which the two)Tj
T*
(substituents were located the same side with respect to ferrocenyl moiet\
y. And the molecules formed a rod-)Tj
T*
(like structure, which was favorable to show liquid crystallinity. On the\
contrary, the molecular structure of)Tj
T*
(bMAF-5 was the S-shaped conformation in which the two substituents were \
present in the opposite)Tj
T*
(directions, and the molecule formed the rod-like structure containing ga\
uche conformation in methylene unit.)Tj
T*
(The Z-shaped conformation was found out in bMAF-2 and 6, in which the su\
bstituents existed in opposite)Tj
T*
(directions accompanying extremely bent structure at the flexible spacers\
. The rod-like molecular feature and)Tj
T*
(high ratio of length to breadth ratio\(aspect ratio\) of the molecule ar\
e one of the most important points for)Tj
T*
(bMAF-n to show liquid crystallinity. )Tj
T*
(The difference interaction networks were found out in crystals of U-shap\
ed bMAF-n. In the crystals of)Tj
T*
(bMAF-8, 9 and 10, which showed a monotropic-nematic phase and a smectic \
one, CH-)Tj
/C2_0 1 Tf
34.88 0 Td
<028C>Tj
/TT1 1 Tf
( and )Tj
/C2_0 1 Tf
<028C>Tj
/TT1 1 Tf
(-)Tj
/C2_0 1 Tf
<028C>Tj
/TT1 1 Tf
( interactions)Tj
-34.88 -1.5 Td
(existed in the neighboring molecules. On the other hand, bMAF-3, which s\
howed only monotropic-nematic)Tj
T*
(phase, had not only an intermolecular interaction but also an intramolec\
ular interaction. Consequently, the)Tj
T*
(difference may play an important role in giving rise to the mesomorphism\
.)Tj
ET
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