623-24-5Relevant articles and documents
Synthesis and crystal structure of 1,4-bis{[(2'-Thenylaminoformyl)phenoxyl] methyl}benzene
Wang, Li,Wang, Xiao-Run,Cheng, Guo-Quan,Peng, Yun-Qiao,Song, Xue-Qin
, p. 10004 - 10006 (2013)
A novel salicylamide derivative i.e., 1,4-bis{[(2'-thenylaminoformyl) phenoxyl]methyl}benzene with the m.f. C32H28N 2O4S2 has been synthesized and the crystal structure was determined by single crystal X-ray diffraction. There are strong intramolecular hydrogen bonding between the amide nitrogen atoms and the ethereal oxygen atoms which stabilized the structure to form a trans configuration. Furthermore the title compound are linked by intermolecular C9-H9O1 hydrogen bonds into an infinite 1D chain parallel to the bc plane.
Synthesis of 2,24-Diene-12,13,15,16,34,35,37,38-octaphenyl[44]triphenylparacyclophane
Wiredu, Bernard,Thapa, Mahendra,Hua, Sheen Y.,Desper, John,Hua, Duy H.
, p. 3585 - 3590 (2021)
A new octaphenyl[4.4]triphenylparacyclophanediene was readily synthesized in six steps from p -xylene via the installment of bromine atoms, replacement with a vinyl group, carbonylative coupling, intermolecular followed by intramolecular double Grubbs olefin metathesis, Knoevenagel condensation, and Diels-Alder cycloaddition. The belt-shaped structure and trans -stereochemistry of the alkene moieties of the octaphenyl[4.4]triphenylparacyclophane and a synthetic intermediate, 2,21-dioxo-11,30-diene[3.4.3.4]paracyclophane, were determined by X-ray crystallography. The synthetic methodology leading to octaphenyl[4.4]triphenylparacyclophane is applicable for the synthesis of substituted triphenylparacyclophanes and possibly their corresponding bis-hexabenzocoronenylparacyclophanes via a Scholl-Mullen oxidative aryl-aryl coupling reaction.
Chiral Fluorescent Metal-Organic Framework with a Pentanuclear Copper Cluster as an Efficient Luminescent Probe for Dy3+Ion and Cyano Compounds
Wang, Ying,Zhou, Yan Ni,Liang, Yu,Cheng, Lin,Fang, Yu
supporting information, p. 15085 - 15090 (2021/10/20)
Luminescent probes have been used for the detection of various heavy metals and toxic compounds. A novel sensor with excellent sensitivity and selectivity is in high demand. Herein, we designed and synthesized a three-dimensional copper-organic framework of pcu α-Po primitive cubic topology with a Schl?fli symbol of {4.4.4.4.4.4.4.4.4.4.4.4.*.*.*}. By taking advantage of metal clusters and a triazole ligand as the metal-organic framework (MOF) components, the newly obtained MOF is stable in various environments and can be potentially used as the sensor. Remarkably, this MOF-based sensor shows high sensitivity and selectivity toward a dysprosium ion (Dy3+) in a multiple-lanthanide mixed solution. Besides, it exhibits luminescent quenching toward various cyano compounds. This chiral cluster-based network provides a potential luminescent probe for various inorganic and organic compounds with high sensitivity and selectivity.
Synthesis and photophysics of new pyridyl end-capped 3D-dithia[3.3]paracyclophane-based Janus tectons: Surface-confined self-assembly of their model pedestal on HOPG
Attias, A.-J.,Auffray, M.,Charra, F.,Kreher, D.,Mathevet, F.,Sosa Vargas, L.
, p. 7665 - 7674 (2020/06/10)
Surface-confined supramolecular self-assembly is currently a promising strategy to create well-organised 2D-networks on conducting surfaces. However, using such substrates tends to quench any electronic properties of the adsorbed molecules. In this context, new pyridyl end-capped 3D-dithia[3.3]paracyclophane-based molecules were designed, along with their model compound (pedestal), with the objective of self-assembling these tectons on any substrate. The synthesis of these new molecules was not straightforward and is consequently described in detail. Once the materials were successfully isolated, their optoelectronic properties were investigated to study potential non-covalent interactions: through pH-dependent absorption and emission measurements, and infra-red spectrometry. We evidenced that both ionic bonding and coordination bonding are compatible with the molecules design. Finally, preliminary scanning tunneling microscopy (STM) studies were performed to study the supramolecular self-assembly properties of the model lower-deck (pedestal) on highly oriented pyrolytic graphite (HOPG): we observed a quasi-square lattice of self-assembled 2D-networks that appear to form independently of the underlying HOPG lattice.
PROCESS FOR PREPARING CYCLOHEXANEDIMETHANOLS AND REACTION PRECURSORS THEREOF
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Page/Page column 11; 14, (2019/01/29)
The present disclosure relates to processes for preparing cyclohexanedimethanol and reaction precursors thereof. The processes include reacting a compound of formula (II)with water in the presence of an organic solvent to form a compound of formula (III):The compound of formula (III) can be further used in the preparation of cyclohexanedimethanol.
SYSTEM AND METHOD FOR PREPARING AROMATIC DERIVATIVE
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Paragraph 0077-0078, (2018/03/25)
A system for preparing an aromatic derivative is provided, including: a photo-bromination reaction section for performing a photocatalytic reaction of an aromatic hydrocarbon and a brominating agent to form an aromatic hydrocarbon bromide; a substitution reaction section for performing a substitution reaction of the an aromatic hydrocarbon bromide from the photo-bromination reaction section with an alkali base compound or an alkali carboxylate compound to form an aromatic derivative; and a regeneration unit for reacting an alkali metal bromide formed by the substitution reaction section with an acid to form a hydrobromic acid. The regeneration unit is in fluid communication with the photo-bromination reaction section, such that the hydrobromic acid is recycled to the photo-bromination reaction section. A method for preparing the aromatic derivative is also provided.
New cyanopyridine based conjugative polymers as blue emitters: Synthesis, photophysical, theoretical and electroluminescence studies
Pilicode, Naveenchandra,K M, Nimith,M N, Satyanarayan,Adhikari, Airody Vasudeva
, p. 6 - 15 (2018/06/19)
Herein, we report the design of three new blue light emitting conjugated polymers (Th-Py-1, Th-Py-2 and Th-Py-3), carrying cyanopyridine ring as a strong electron accepting unit and thiophene as well as phenylene vinylene scaffolds with different substituents, as electron donating moieties. The newly designed monomers/polymers were synthesized using well-known synthetic protocols such as cyclocondensation, O-alkylation, Suzuki cross coupling, Wittig and Knoevenagel reactions. They were well-characterized by spectral, thermal, photophysical, electrochemical and gel permeation chromatography (GPC) techniques. Further, they were subjected to theoretical studies using DFT simulations, performed at B3LYP/TZVP level using Turbomole 7.2 V software package. The new polymers were tested in PLED devices (ITO/PEDOT: PSS/Polymer/Al) as emissive materials. Optical studies revealed that, all the polymers displayed light absorption in the range of 377–397 nm and blue light emission in the order of 432–482 nm, respectively. Further, their band-gaps were calculated to be in the order of 2.55–2.64 eV using both optical and electrochemical data. Furthermore, the TGA study indicated that, they possess good thermal stability with onset decomposition temperature, greater than 300 ?C under nitrogen atmosphere. Interestingly, use of these polymers in new PLEDs as emissive layers, has shown improved performance when compared to previously reported polymers in similar type of devices. They show blue light emission with a low threshold voltage of 3.5–3.9 V, affirming an efficient electron injection in the diodes.
Method for preparing cyclohexanedimethanol and reaction precursor thereof
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Paragraph 0136-0138, (2017/11/29)
The invention discloses a method for preparing cyclohexanedimethanol and a reaction precursor thereof. The method comprises the steps that bis(bromomethyl)benzene is used as a raw material to react with water to prepare xylylene glycol as a reaction precursor and further hydrogenation is performed to prepare the cyclohexanedimethanol. The preparation method of the invention mainly comprises solid-liquid reaction and is better in safety, simple reactants and agents are used to prepare the xylylene glycol, the process is simple, complicated residues can be avoided, and the agent recovery process is relatively simple, and the effects of being more environmentally friendly and more economic are realized.
A sPP for bridged binuclear metallocene compound and its preparation method and application
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Paragraph 0054; 0056; 0057; 0058, (2017/08/26)
The invention provides a bridged dinuclear metallocene compound for sPP as well as a preparation method and application thereof. The structure of the metallocene compound is as shown in the formula I, wherein R1 is selected from hydrogen, methyl, methylene, ethyl and phenyl; R2 is selected from hydrogen, tert-butyl, bromine and chlorine. The preparation method of the compound comprises the following steps: carrying out a reaction on p-xylene, N-bromosuccinimide and benzoyl peroxide to obtain p-cyclite; carrying out a reaction on an alkene-enriched compound and a fluorene lithium compound to obtain bridged lithium fluorene metallocene salt; carrying out a reaction on p-cyclite and the bridged lithium fluorene metallocene salt to obtain a ligand; carrying out a reaction on the ligand and n-butyl lithium, and carrying out a reaction with zirconium tetrachloride to obtain the bridged dinuclear metallocene compound for sPP. The invention further provides the application for using the metallocene compound as a catalyst to catalyze a propylene polymerization reaction.
Bridged asymmetric dinuclear metallocene compounds, and preparation and application thereof
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Paragraph 0108, (2017/07/22)
The invention provides bridged asymmetric dinuclear metallocene compounds, and preparation and application thereof. The compounds have the structure disclosed as Formula I, wherein R1s and R2s are selected from C1-C5 alkyl or phenyl, and are different; optionally, the two R1s or two R2s can independently form a naphthene base with the carbon atom connected with the R1 or R2; and R3 and R4 are selected from hydrogen, C1-C8 alkyl, bromine or chlorine. The bridged asymmetric dinuclear metallocene compounds for sPP have the advantages of simple synthesis route, high product yield and easy separation and purification; and when being used for catalyzing propylene polymerization, the bridged asymmetric dinuclear metallocene compounds have the advantages of low cocatalyst consumption, high catalytic activity and high polymer syndiotacticity.
