Journal
CHEMISTRY OF MATERIALS
Volume 29, Issue 17, Pages 7587-7595Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.7b02922
Keywords
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Funding
- Ministerio de Ciencia e Innovation [CTQ2014-52796-P]
- MIUR under ELIOTROPO [PON03PE_00092_2]
- PRIN JHEYMC projects
- CNRS
- University of Strasbourg
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This paper reports the synthesis, liquid crystal behavior, and charge-transport properties in the mesophase of isocyano-triphenylene gold, copper, palladium, and platinum complexes [MX(CNR)] (CNR = 2-(6-(4-isocyanophenoxy)hexyloxy)-3,6,7,10,11-pentakisdodecyloxytriphenylene; M = Au, X = Cl, C6F5, C6F4OC10H21, CN; M = Cu, X = Cl), [(mu-4,4'-C6F4C6F4){Au-(CNR)}(2)], [(mu-Cl-2){Cu(CNR)(2)}(2)], and [MX2(CNR)(2)] (M = Pd, Pt; X = Cl, Br, I, and M = Pt, X = CN). The thermal and electronic properties of these materials are modulated by the metal fragment. The complexes that display columnar mesomorphism are those that support more than one triphenylene per molecule or those that produce a similar effect by dipole-dipole interactions between the metal groups. These circumstances improve the balance of favorable enthalpic interactions versus unfavorable entropic contributions into a columnar stacking. Hybrid inorganic/organic dual columnar mesophases with high SCLC hole mobility along the columnar stacking, above 1 cm(2) V-1 s(-1), have been found. It is worth noting that the dicyanoplatinum complex displays mesophase phosphorescence based on Pt center dot center dot center dot Pt interactions.
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