Structural and theoretical analysis of some mesogenic azines containing strong electron donor–acceptor groups

Chloro-fac-tricarbonylrhenium(I) complexes of asymmetric azines derived from 6-acetyl-1,3,7-trimethylpteridine-2,4(1H,3H)-dione with hydrazine and aromatic aldehydes: Preparation, structural characterization and biological activity against several human tumor cell lines

“…In the recent years, the design and synthesis of ligands which combine biological [1][2][3], structural [4] and coordinative properties have burgeoned. Diazines, N-N linked diimines, have recently attracted attention due to their biological properties as anticonvulsant, antidepressant, antiinflammatory, antiviral or antitumor agents [5], the design of liquid crystals [6,7], and as non-linear optical materials [8]. The flexibility of these ligands around the N-N single bond offers several possible mononucleating and binucleating modes and can give rise complexes having different geometries [9][10][11][12][13][14].…”

Liquid Crystalline Properties of Unsymmetrical N-(o-hydroxybenzylidene)-N′-(4-n-alkoxybenzoyloxybenzylidene)azines: Synthesis and Characterization

“…Furthermore, they have received attention as possible nonlinear optical (NLO) materials, especially the unsymmetrical azines with an electron donor on one side and an electron acceptor on the other side [3][4][5]. Azines have been used for the preparation of the nematic liquid crystals and liquid crystal display devices such as TN-LCD (twisted nematic-LCD), STN-LCD (supertwisted nematic-LCD) and TFT-LCD (thin film transistor-LCD) having improved electro-optical properties [6,7].…”

“…Over the past few decades, a lot of low molar mass Schiff base esters have been synthesized and investigated extensively for liquid crystalline applications [18][19][20][21][22][23]. Centore and Garzillo [24] reported a structural and theoretical analysis of biphenylene azines containing a methyl group on the azine system and strong electron donor-acceptor groups on the phenylene rings. Centore et al [5] reported asymmetrical azines which show both nematic and smectic phases.…”

Tautomerism in 2-ketomethylquinolineazines

“…These compounds are also valuable intermediates for synthesis of heterocyclic compounds [1], show biological activities including antibacterial [2], antifungal [3] and antitumor [4], form complexes with transition metals [5], and are used as nonlinear optical materials [6] and in designing of liquid crystals [7].…”