NDLI: Disk-like liquid crystals of transition metal complexes Part 21.‡—Critical molecular structure change from columnar to lamellarliquid crystal in bis(diphenylglyoximato)nickel(II)-based complexes

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Disk-like liquid crystals of transition metal complexes Part 21.‡—Critical molecular structure change from columnar to lamellarliquid crystal in bis(diphenylglyoximato)nickel(II)-based complexes

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Disk-like liquid crystals of transition metal complexes Part 21.‡—Critical molecular structure change from columnar to lamellarliquid crystal in bis(diphenylglyoximato)nickel(II)-based complexes

Content Provider	Royal Society of Chemistry (RSC)
Author	Kobayashi, Nagao Ohta, Kazuchika Ikejima, Mayumi Yamamoto, Iwao Higashi, Ryuji
Copyright Year	1998
Abstract	The critical molecular structure change from columnar to lamellar mesophases in bis(diphenylglyoximato)nickel(ii)-based complexes has been investigated. When the number of the long chains surrounding the core complex part was reduced from eight to four, the mesophase changes its structure from columnar Colhd to novel disk-like lamellar DL.rec(P2121). When the length of the four chains at the p-positions was fixed and the remaining four chains at m-positions were gradually made shorter, each of the complexes shows a columnar Colho mesophase. Surprisingly, even when the substituents at m-positions are methoxy or methyl groups, a columnar Colho mesophase is still observed. When the substituents at m-positions were OH groups, another novel disk-like lamellar DL.rec(P211) mesophase is observed. Hence, it can be shown that the critical molecular structure change from the columnar to lamellar mesophase occurs between methoxy and hydroxy groups at the m-position. In both of the two novel DL.rec mesophases in the present study, the core complex parts are parallel to the layers and the long chains are normal to both the layers and the core complex planes. Such a unique mesophase structure has not been previously observed. The synthesis of these complexes and the temperature-dependent X-ray structural analyses of the unique mesophases are reported.
Starting Page	1979
Ending Page	1991
Page Count	13
File Format	PDF
ISSN	09599428
Volume Number	8
Issue Number	9
Journal	Journal of Materials Chemistry
DOI	10.1039/a800897c
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Nickel Mesophase Methoxy group X-ray crystallography
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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Disk-like liquid crystals of transition metal complexes Part 21.‡—Critical molecular structure change from columnar to lamellarliquid crystal in bis(diphenylglyoximato)nickel(II)-based complexes