Discotic liquid crystals of transition metal complexes 60†: synthesis and π-acceptor abilities of novel discotic liquid crystals based on dithiolene nickel complex

We have synthesized thirteen novel metallomesogens based on dithiolene nickel complex showing π-acceptor properties: (o-C 12 OPhO) 4 DTNi (1), (m-C 12 OPhO) 4 DTNi (2), (p-C 12 OPhO) 4 DTNi (3), [o,m-(C 12 O) 2 PhO] 4 DTNi (4), [m,m′-(C 12 O) 2 PhO] 4 DTNi (5), [p,m-(C n O) 2 PhO] 4 DTNi (6: n = 10(...

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Bibliographic Details
Published in:	Molecular Crystals and Liquid Crystals 2024-03, Vol.768 (4), p.27-51
Main Authors:	Ohta, Kazuchika, Hirazawa, Hiroshi
Format:	Article
Language:	eng
Subjects:	Acceptor ability Coordination compounds Crystals discotic liquid crystal dithiolne nickel complex Electrochemistry homeotropic alignment Liquid crystals Metal complexes metallomesogen Nickel Transition metal compounds X-ray diffraction
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Summary:	We have synthesized thirteen novel metallomesogens based on dithiolene nickel complex showing π-acceptor properties: (o-C 12 OPhO) 4 DTNi (1), (m-C 12 OPhO) 4 DTNi (2), (p-C 12 OPhO) 4 DTNi (3), [o,m-(C 12 O) 2 PhO] 4 DTNi (4), [m,m′-(C 12 O) 2 PhO] 4 DTNi (5), [p,m-(C n O) 2 PhO] 4 DTNi (6: n = 10(a), 12(b), 14(c), 16(d)) and Cl-[p,m-(C n O) 2 PhO] 4 DTNi (7a-d). By using plarizing microscopic observations, differential scanning chalorimetry, and temperature-variable X-ray diffraction studies, the columnar liquid crystalline mesophases were established for the 6a-d and 7a-d derivatives. It was also revealed from the electrochemical measurements that each of the complexes of 1-7 showed good π-acceptor abilities. In particular, the derivatives, Cl-[p,m-(C n O) 2 PhO] 4 DTNi (7a-d), exhibit the most positive reduction potential from +0.08 to +0.07 V versus. SCE.
ISSN:	1542-1406 1563-5287 1527-1943