37062-63-8Relevant academic research and scientific papers
Liquid crystal behavior, photoluminescence and gas sensing: A new series of ionic liquid crystal imidazole and benzoimidazole bearing chalcone groups, synthesis and characterization
Abbas, Wahaj Raed,Mohammad, Abdulkarim-Talaq
, p. 38444 - 38456 (2021/12/20)
Four new series of chalcones containing imidazole bromonium and benzimidazole bromonium salts with spacer alkyl chains (Cn, n = 2 and 4) were synthesized and the chemical structure, thermal behavior, photoluminescence and gas sensing were characterized by
Near-infrared chlorinated aza-boron fluoride dye, and preparation method and application of dye
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Paragraph 0032-0035, (2018/09/28)
The invention discloses a near-infrared chlorinated aza-boron fluoride dye. In a preparation process of the dye, a chlorine substituted basic aza-boron fluoride framework is finally prepared by a multi-step reaction such as a synthesis-addition reaction-c
Near-infrared aza-pyrrolidine dye, and preparation method and application of near-infrared aza-pyrrolidine dye
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Paragraph 0051-0054, (2018/09/28)
The invention discloses an aza-pyrrolidine dye which comprises halogen, heavy metals and an aza-pyrrolidine framework. The halogen and the multiple heavy metals are introduced onto an aza-pyrrolidinematrix, so that the dye is endowed with more excellent p
Luminescent mesogenic borondifluoride complexes with the Schiff bases containing salicylideneamines and β-enaminoketones core systems
Lei, Zih-Yang,Lee, Gene-Hsiang,Lai, Chung K.
, p. 44 - 56 (2018/04/02)
Three new families of borondifluoride complexes 1a–c derived from salicylideneamines 2a and β-enaminoketonates 2b–c were reported, and their mesomorphic and optical properties were also investigated. One single crystal and molecular structure of nonmesogenic BF2 complex 1c (n = 10) was resolved and the geometry of the central boron atom was tetrahedron. A larger dihedral angle of 81.3° between the two phenyl rings observed in crystal lattice was attributed to the lack of liquid crystallinity. Boron complexes 1a formed monotropic SmA phases, while boron complexes 1b exhibited enantiotropic SmC mesophases. The optical property of the boron complexes was dependent on their molecular structures, and they emitted a blue–to–green emission at λmax = 476–541 nm in the solution and 488–550 nm in the solid state. This is the first group of mesogenic BF2 complexes with the Schiff bases derived from respective salicylideneamines and β-enaminoketones.
Design, synthesis, and discovery of 5-((1,3-diphenyl-1H-pyrazol-4-yl)methylene)pyrimidine-2,4,6(1H,3H,5H)-triones and related derivatives as novel inhibitors of mPGES-1
Ding, Kai,Zhou, Ziyuan,Zhou, Shuo,Yuan, Yaxia,Kim, Kyungbo,Zhang, Ting,Zheng, Xirong,Zheng, Fang,Zhan, Chang-Guo
, p. 858 - 862 (2018/02/21)
Human mPGES-1 has emerged as a promising target in exploring a next generation of anti-inflammatory drugs, as selective mPGES-1 inhibitors are expected to discriminatively suppress the production of induced PGE2 without blocking the normal biosynthesis of other prostanoids including homeostatic PGE2. Therefore, this therapeutic approach is believed to reduce the adverse effects associated with the application of traditional non-steroidal anti-inflammatory drugs (tNSAIDs) and selective COX-2 inhibitors (coxibs). Identified from structure-based virtue screening, the compound with (Z)-5-benzylidene-2-iminothiazolidin-4-one scaffold was used as lead in rational design of novel inhibitors. Besides, we further designed, synthesized, and evaluated 5-((1,3-diphenyl-1H-pyrazol-4-yl)methylene)pyrimidine-2,4,6(1H,3H,5H)-triones and structurally related derivatives for their in vitro inhibitory activities. According to in vitro activity assays, a number of these compounds were capable of inhibiting human mPGES-1, with the desirable selectivity for mPGES-1 over COX isozymes.
Near-infrared photo-thermal dye based on aza-fluoro borane, preparation and application
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Paragraph 0049; 0051; 0052, (2018/03/24)
The invention discloses a near-infrared photo-thermal dye based on aza-fluoro borane, preparation and application. The photo-thermal dye comprises an electron-donating group containing lone pair electrons and a basic aza-fluoro borane skeleton. The near-i
Synthesis and characterization of new homologous series of unsymmetrical liquid crystalline compounds based on chalcones and 3, 5-disubstituted isoxazoles
Sowmya,Lokanatha Rai
, p. 67 - 73 (2017/01/24)
Two homologous series of unsymmetrical alkylated chalcones and 3,5-diaryl isoxazoles, consisting of 20 members, with various n-alkyl bromides (n=2?7, 10, 12, 14, 16) have been synthesized and studied for their liquid crystalline property. Simple strategy was employed to achieve the target materials. Flexibility in the synthesized molecules is provided by attaching straight alkoxy chains, where one terminal group is fixed and other terminal group is varied. The synthesized compounds were characterized on the basis of Mass, IR and NMR spectroscopy. The stability and the range of the mesophases increased with the length of the chain on the isoxazoles. The melting point, transition temperatures and enantiotropic liquid crystal morphologies were determined by polarizing optical microscopy (POM) in conjunction with a hot stage and by differential scanning calorimetry (DSC). [Figure not available: see fulltext.]
Synthesis and study of mesomorphic properties in rod-like chalconyl compounds
Sharma, Vinay S.,Patel
, p. 52 - 61 (2017/03/08)
In order to investigate the influence of the central linking group and effect on flexibility on mesophase behavior of liquid crystal we have synthesized newly homologous series viz. 3-(4-Octyloxyphenyl)-1-(4′-n-alkoxy phenyl) prop-2-en-1-one (Series-l) consists of thirteen homologues (C1 to C8, C10, C12, C14, C16, C18). Textures of a nematic phases are threaded or Schlieren type. The textures of smectic and nematic phase are directly judged from the heating and cooling condition. Group efficiency order for mesophases is derived on the basis of thermal stabilities from the comparative study of thermometric data determined from structurally analogous series. A transition curve as depicted in a phase diagram behaves in normal manner. Structural and conformational characterization of these new compounds had achieved by 1H NMR, 13C NMR, IR, and elemental analysis.
Synthesis and liquid crystalline properties of a new homologous series of 4,5-disubstituted 2H-[1,2,3]-triazoles via azide-chalcone oxidative cycloaddition reaction
Sowmya,Rai, K. M. Lokanatha
, p. 764 - 768 (2017/07/07)
A new homologous series of 4,5-disubstituted 2H-[1,2,3]-triazole derivatives were synthesized from chalcones and sodium azide via oxidative cycloaddition reaction; CuI was used as catalyst. Flexibility in the synthesized molecules was provided by attaching straight alkoxy chains. The synthesized compounds were characterized by elemental analysis, and 1HNMRand 13CNMRand LC-MS spectroscopies . The stability and range of the mesophases increased with the length of the chain on the triazoles. The melting point, transition temperatures, and enantiotropic liquid crystal morphologies were determined by differential scanning calorimetry (DSC) and polarizing optical microscopy (POM) equipped with a hot stage. Journal compilation
Fluorescent columnar bis(boron difluoride) complexes derived from tetraketonates
Chen, Ya-Wen,Lin, Yen-Chun,Kuo, Hsiu-Ming,Lai, Chung K.
, p. 5465 - 5477 (2017/07/10)
Three new series of bis-(boron difluoride) complexes 1a-c derived from substituted tetraketonates 2a-c are reported, and their mesomorphic and optical properties have been investigated. Two single crystals of mesogenic ligand 2a (n = 6) and nonmesogenic d
