Discotic Liquid Crystals Based on Cu(I) Complexes with Benzoylthiourea Derivatives Containing a Perfluoroalkyl Chain

Abstract

Mesomorphic three-coordinate copper(I) complexes ([Cu(BTU) 2 X], where X � Cl or Br) based on a new N-benzoylthiourea (BTU) ligand with two decyloxy and one perfluorooctyl groups at its periphery were designed and prepared. e BTU ligand coordinates via the S atom in a neutral monodentate fashion as confirmed by IR and NMR spectroscopy data. e liquid crystalline behavior of these copper(I) complexes was investigated by a combination of polarized optical microscopy (POM), differential scanning calorimetry (DSC), and X-ray diffraction analysis (XRD), while their thermal stability was studied by thermogravimetric analysis (TGA). ese new copper(I) complexes have mesomorphic properties and exhibit a hexagonal columnar mesophase over a large temperature range, more than 100°C.

Ultra-high Seebeck coefficient of a thermal sensor through entropic optimisation of ligand length of Fe(ii) spin-crossover (SCO) materials

“…This texture gradually transformed to the mosaic character of a crystalline phase when further cooled to room temperature. Similarly, complex 2 melted at about 348 K and cleared to an isotropic liquid at 437 K. Aer further cooling, an optical texture like complex 1 (Col) was developed at 404 K. This texture then transformed to a broken-fan texture at 390 K. Subsequently, complex 3 melted at approximately 362 K, and cleared to an isotropic liquid at 472 K. Upon cooling, a focal conic fan-like (Col) optical texture [39][40][41] was formed at 397 K (Fig. 4(b)).…”

A rigid calcium 2-ethylhexylphosphate one-dimensional polymer: synthesis, structure, thermal behaviour and decomposition chemistry

“…[22][23][24] Alkali and alkaline metal-based alkyl phosphates and other ligands having aromatic groups along with alkoxy chains exhibit liquid crystalline behaviour. [25][26][27][28][29][30][31][32] Besides, the crystal structures of magnesium diethyl phosphate 33 and barium diethyl phosphate, 34 which do not exhibit any liquid crystalline properties, have been reported even earlier. As far as long-chain alkyl phosphates are concerned, Dębowski et al have reported on thermal transitions of linear aluminium tris(diorganophosphate) chains using DSC, powder XRD, TGA and TG-QMS, as well as optical spectroscopy.…”

Complexes of 1,3-Diisobutyl Thiourea with Copper(I), Zinc(II) and Mercury(II): Their Antioxidant and Antibacterial Evaluation

“…Complexes with late transition metals, such as Zn and Hg, possess photoluminescence properties and applications in nonlinear optics [17][18][19]. Complexes with Cu and Zn have been synthesized and tested in the field of bioinorganic chemistry [20][21][22][23]. The wide range of biological activities of thiourea complexes such as antimicrobial, pesticidal, herbicidal, rodenticidal, and anticancer exponentially increases the importance of these compounds.…”