1,3-Dimethyl-5-(3,4,5-tris(alkoxy)benzoyl) barbituric acid derivatives and their liquid crystalline difluoroboron complexes: Synthesis, characterization and comparative investigations of mesomorphic, thermotropic and thermo-morphologic properties

Polycatenar unsymmetrical β-diketonate ligands as a useful tool to induce columnar mesomorphism on highly luminescent boron difluoride complexes

“…A small amount of concentrated HCl was added to neutralise the diketone. The brown precipitate was ltered and washed with small portions of cold pentane to yield a pale yellow solid (0.84 g, 60% 4 J 2.1, H4 00 ), 6.74 (1H, s, H2), 6.96 (2H, AA 0 XX 0 system, N 8.9, H3 0 and H5 0 ), 7.08 (2H, d, 4 J 2.1, H2 00 and H6 00 ), 7.95 (2H, AA 0 XX 0 system, N 8.9, H2 0 and H6 0 ), 16.97 (1H, s, OH). This journal is © The Royal Society of Chemistry 2014…”

“…1-(3 0 ,5 0 -Dihexadecyloxyphenyl)-3-(3 00 ,4 00 ,5 00 -trihexadecyloxyphenyl)-propane-1,3-dione, D 2,3 (16/16). This compound was synthesised using the same procedure as for 1-(4 0 -hexadecyloxyphenyl)-3-(3 00 ,5 00 -dihexadecyloxyphenyl)-propane-1,3-dione by condensation of 3,5-dihexadecyloxyacetophenone and methyl 4 J 2.0, H4 0 ), 6.68 (1H, s, H2), 7.08 (2H, d, 4 J 2.0, H2 0 and H6 0 ), 7.18 (2H, s, H2 00 and H6 00 ), 16.97 (1H, s, OH).…”

“…3 In this context, considerable efforts were made in the development of organic materials based on mesogenic uorophores; 3,4,10,12 however, the use of metallomesogens (metal-containing liquid crystals) for this technical purpose has been more restricted. 13 On the other hand, although the eld of luminescent metallomesogens based on transition 14 and lanthanide 15 metals has been abundantly expanded, little information is available when considering the presence of a metalloid such as boron, 16,17 which could offer new opportunities in research.…”

Advances in the Supramolecular Chemistry of Tetracoordinate Boron-Containing Organic Molecules into Organogels and Mesogens

“…Boron-containing organic molecules have been studied for their mesogenic properties along with luminescence properties ( Camerel et al, 2007 ; Maeda et al, 2010 ; Olivier et al, 2010 ; Sánchez et al, 2010 ; Turanova et al, 2010 ; Benstead et al, 2011a , 2011b ; Maeda et al, 2011 ; Olivier et al, 2012 ; Bando et al, 2013 ; Giziroglu et al, 2014 ; Sánchez et al, 2014 ; Fang et al, 2017 ; Feng et al, 2018 ; Xiong et al, 2018 ; Cheng et al, 2019 ; Liu et al, 2019 ). The very first reports were put forward by Turanova et al wherein the boron difluoride-diketonate complex obtained from a non-mesogenic diketonate exhibited liquid crystalline properties along with photoluminescent properties ( Turanova et al, 2006 ).…”

Synthesis, characterization, and photoluminescence properties of difluoroboron complexes with bis-β-diketone ligands

“…Also, many applications have been found in photochemical reagents, nonlinear optics, two-photon materials, light-emitters, and chemical and biochemical sensors [5][6][7][8][9][10][11]. Hence, the design, synthesis, and photoluminescence properties of many novel difluoroboron complexes with b-diketone ligands have been studied in recent years [12][13][14].…”