11 results on '"Feng Meng"'
Search Results
2. Characterization and crystal structures of 5-bromo-2-methoxy-4-(p-tolyliminomethyl)phenol and 2-bromo-6-[(6-methylpyridin-2-ylimino)methyl]phenol
- Author
-
Xu-Feng Meng, Xin Zhou, Yanli Dong, Jing-Jun Ma, and Chao Li
- Subjects
chemistry.chemical_classification ,Schiff base ,Double bond ,Hydrogen bond ,02 engineering and technology ,Crystal structure ,Triclinic crystal system ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Inorganic Chemistry ,chemistry.chemical_compound ,Crystallography ,chemistry ,X-ray crystallography ,Materials Chemistry ,Molecule ,Physical and Theoretical Chemistry ,0210 nano-technology ,Monoclinic crystal system - Abstract
Two bromo-substituted Schiff bases 5-bromo-2-methoxy-4-(p-tolyliminomethyl)phenol (1) and 2-bromo-6-[(6-methylpyridin-2-ylimino)methyl]phenol (2) are prepared and characterized by elemental analysis, 1H and 13C NMR, and single crystal X-ray diffraction. Compound 1 crystallizes in the triclinic space group P\(\bar 1\) with unit cell dimensions a = 6.228(1) A, b = 10.929(2) A, c = 21.312(2) A, α = 104.230(2)°, β = 91.780(2)°, γ = 90.890(2)°, V = 1405.0(4) A3, Z = 4, R1 = 0.0359, and wR2 = 0.0830. Compound 2 crystallizes in the monoclinic space group P21/c with unit cell dimensions a = 8.180(2) A, b = 12.011(3) A, c = 12.843(3) A, β = 106.263(2)°, V = 1211.4(4) A3, Z = 4, R1 = 0.0364, and wR2 = 0.0889. X-ray diffraction indicates that the Schiff base molecules of the compounds display trans configuration with respect to the C=N double bonds. The crystal structures of the compounds are stabilized by hydrogen bonds and weak π•••π interactions.
- Published
- 2015
3. Synthesis, Crystal Structure, and Biological Property of a Novel Dinuclear Copper(II) Complex
- Author
-
Xu-Feng Meng, Xin Zhou, Wei-Ning Li, Jing-Jun Ma, and Chao Li
- Subjects
Copper complex ,010405 organic chemistry ,chemistry.chemical_element ,Cyclohexylamine ,Crystal structure ,010402 general chemistry ,01 natural sciences ,Copper ,0104 chemical sciences ,Inorganic Chemistry ,Perchlorate ,chemistry.chemical_compound ,Crystallography ,chemistry ,Biological property ,Polymer chemistry ,Methanol ,Physical and Theoretical Chemistry ,Antibacterial activity - Abstract
The reaction of 2-acetylpyridine, cyclohexylamine and copper(II) perchlorate in methanol resulted in the dinuclear copper(II) complex [Cu2L2]·2ClO4, where L is the monoanionic form of 1-methoxy-1,3...
- Published
- 2015
4. Synthesis, Structure, and Biological Property of New Vanadium Complex With Aroylhydrazone Ligand
- Author
-
Chao Li, Xin Zhou, Yanli Dong, Jing-Jun Ma, and Xu-Feng Meng
- Subjects
Schiff base ,Ligand ,Stereochemistry ,Vanadium ,chemistry.chemical_element ,Crystal structure ,010402 general chemistry ,010403 inorganic & nuclear chemistry ,01 natural sciences ,0104 chemical sciences ,law.invention ,Inorganic Chemistry ,chemistry.chemical_compound ,chemistry ,law ,Octahedral molecular geometry ,Polymer chemistry ,Methanol ,Physical and Theoretical Chemistry ,Crystallization ,Single crystal - Abstract
The aroylhydrazone Schiff base ligand [N'-(5-chloro-2-hydroxybenzylidene)-4-hydroxybenzohydrazide (H2L) and salicylhydroxamic acid (Hsha) reacting with VO(acac)2 in methanol gave the complex [VOL(sha)]·3H2O. The complex was characterized by elemental analyses and IR spectroscopic method in the solid state. Single crystal X-ray analysis was performed, which indicated that the complex is a mononuclear compound. The V atom in the complex is in an octahedral geometry. VIV in VO(acac)2 was oxidized to VV in the complex by aerial oxygen during the synthesis and crystallization. Thermal behavior of the complex was studied. Antibacterial activity of the aroylhydrazone ligand and the complex has been studied on the bacteria strains B. subtilis, E. coli, and S. aureus.
- Published
- 2015
5. SYNTHESIS, CHARACTERIZATION AND CRYSTAL STRUCTURES OF BENZOHYDRAZONE COMPOUNDS DERIVED FROM 5-METHYLSALICYLALDEHYDE
- Author
-
Wei-Ning Li, Jing-Jun Ma, and Xu-Feng Meng
- Subjects
chemistry.chemical_classification ,Double bond ,π···π interaction ,Hydrogen bond ,5-methylsalicylaldehyde ,Benzohydrazone ,General Chemistry ,Crystal structure ,Carbon-13 NMR ,hydrogen bonding ,X-ray diffraction ,Crystallography ,chemistry ,Molecule ,Orthorhombic crystal system ,Single crystal ,Monoclinic crystal system - Abstract
A series of three new benzohydrazone derivatives, N'-(2-hydroxy-5-methylbenzylidene)-4-methylbenzohydrazide (1), N'-(2-hydroxy-5-methylbenzylidene)-4-hydroxybenzohydrazide (2), and N'-(2-hydroxy-5-methylbenzylidene)-4-dimethylaminobenzohydrazide (3), were prepared and characterized by elemental analysis, Ή and 13C NMR, and single crystal X-ray diffraction. Compound (1) crystallizes in the monoclinic space group C2/c with unit cell dimensions a = 27.421(1) Å, b = 9.9843(4) Å, c = 24.302(1) Å, β = 119.416(2)°, V = 5795.7(5) ų, Z = 16, R1 = 0.0520, and wR2 = 0.1172. Compound (2) crystallizes in the orthorhombic space group Pna2(1) with unit cell dimensions a = 9.511(2) Å, b = 9.866(2) Å, c = 13.871(3) Å, V = 1301.6(5) ų, Z = 4, R1 = 0.0342, and wR2 = 0.0912. Compound (3) crystallizes in the monoclinic space group C2/c with unit cell dimensions a = 26.957(2) Å, b = 10.0612(9) Å, c = 25.526(2) Å, β = 114.405(3)°, V= 6304.5(10) ų, Z = 16, R1 = 0.0532, and wR2 = 0.1079. X-ray diffraction indicated that the benzohydrazone molecules of the compounds display trans configuration with respect to the C=N double bonds. The crystal structures of the compounds are stabilized by hydrogen bonds and weak π···π interactions.
- Published
- 2014
6. (E)-N'-(4-Hy-droxy-benzyl-idene)-3-nitro-benzohydrazide
- Author
-
Dong-Yue Wang, Jing-Jun Ma, and Xu-Feng Meng
- Subjects
chemistry.chemical_classification ,Double bond ,Hydrogen bond ,Stacking ,Centroid ,General Chemistry ,Crystal structure ,Dihedral angle ,Condensed Matter Physics ,computer.software_genre ,Organic Papers ,Crystallography ,chemistry.chemical_compound ,chemistry ,General Materials Science ,Data mining ,Benzene ,computer - Abstract
The mol-ecule of the title compound, C(14)H(11)N(3)O(4), assumes an E conformation about the C=N double bond. The benzene rings form a dihedral angle of 3.9 (2)°. The crystal structure is stabilized by N-H⋯O, O-H⋯N, O-H⋯O and C-H⋯O hydrogen bonds, forming layers parallel to (101). In addition, intra-layer π-π stacking inter-actions [centroid-centroid distance = 3.635 (2) Å] are observed.
- Published
- 2011
7. Two metal-organic frameworks based on tetracarboxylic ligand exhibiting high performance for gas adsorption and separation.
- Author
-
Song, Zitong, Zhou, Xia, Feng, Meng, Zhou, PeiPei, and Wang, DongMei
- Subjects
- *
GAS absorption & adsorption , *SEPARATION of gases , *METAL-organic frameworks , *ADSORPTION capacity , *POROUS materials - Abstract
Developing porous materials for purification of acetylene is of great significance, but remains challenging. Currently, the use of metal-organic frameworks (MOFs) for gas adsorption separation has received substantial research interest. Herein, based on the tetracarboxylic acid ligand H 4 TPTA ([1,1':3′,1″-terphenyl]-4,4′,4″,6′-tetracarboxylic acid), two MOFs (ErTPTA and CdTPTA) constructed by trinuclear cluster secondly building units (SBUs) have been successfully synthesized. They are three dimensional (3D) framework with 1D rhomboid channels, demonstrating a (4,8)-connected scu network. A series of gas adsorption tests were performed and the both compounds exhibited outstanding gas selective adsorption performance. Accordingly, the ideal adsorption solution theory (IAST) is used to simulate the adsorption selectivity, the selectivity of CdTPTA for CO 2 /CH 4 is 11.85 (0.5:0.5) and 17.02 (0.05:0.95), and for C 2 H 2 /CH 4 is 11.81 (0.5:0.5); the selectivity of ErTPTA for C 2 H 2 /CO 2 is 4.45 (0.5:0.5). Two novel MOFs were constructed by multinuclear SBUs and H4TPTA ligand, which exhibits good gas adsorption and separation performance. [Display omitted] • Two novel MOFs (ErTPTA and CdTPTA) were constructed by multinuclear SBUs and ligands. • ErTPTA and CdTPTA showed good C 2 H 2 adsorption capacity over CO 2 and CH 4. • ErTPTA exhibited high selectivity for C 2 H 2 /CO 2 , and CdTPTA showed good ability to separate CO 2 /CH 4. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
8. Assembly of two-dimension LMOF materials with excellent detection of Fe3+ ion in water based on overlap mechanism.
- Author
-
Zhang, Yuxiao, Wu, Liang, Feng, Meng, Wang, Dongmei, and Li, Chunxia
- Subjects
- *
CHEMICAL stability , *TEREPHTHALIC acid , *METAL-organic frameworks , *METAL ions , *IONS , *FLUORESCENCE - Abstract
The luminescent metal-organic framework (LMOF) materials are highly desirable applied in detection of large variety of analytes by photoluminescence method. Here, two novel isostructural LMOFs, [EuDTTA(DMF) 3 ]NO 3 and [TbDTTA(DMF) 3 ]NO 3 (EuDTTA and TbDTTA) [H 2 DTTA = 2,5-di(1 H -1,2,4-triazol-1-yl) terephthalic acid], have been successfully obtained. In the structure, binuclear secondary building units (SBUs) interconnected with ligands utilizing carboxylic acid groups extend to 2D layers, and triazole functional groups of the ligands point to the interior of the pore. Based on overlap mechanism, EuDTTA and TbDTTA demonstrated excellent selective and sensitive detection of Fe3+ ion in water. The quenching constants are 3.63 × 104 and 8.39 × 104 M−1 and the detection limits are 4.14 × 10−6 and 1.79 × 10−6 M. In addition, the LMOFs exhibit good structural stability and recyclability after several fluorescence detection tests. This work provides two new LMOF materials for the research in the field of detecting metal ions. EuDTTA and TbDTTA can be used as the promising candidate luminescence sensor for detection of Fe3+ in water. Image 1 • Two-dimension LMOF materials (EuDTTA and TbDTTA) were constructed by binuclear SBUs and ligands. • The structure contains a high density of uncoordinated N atoms pointing to the pore. • Two LMOFs display excellent selective and sensitive detection of Fe3+ ion in water based on overlap mechanism. • Two LMOFs exhibit good recyclability and structural stability. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
9. Petrogenesis and tectonic implication of Paleoproterozoic granites and granulites in the Fengzhen area of North China craton.
- Author
-
Zeng, Liang, Xu, Cheng, Li, Yunxiu, Kynický, Jindřich, Song, Wenlei, Wei, Chunwan, Feng, Meng, and Deng, Miao
- Subjects
- *
CRUST of the earth , *ZIRCON analysis , *GRANITE , *CRYSTAL structure , *METAMORPHIC rocks - Abstract
The North China Craton (NCC) is one of the oldest cratons in the world that preserves the records of many important geological events in the early evolution of the Earth. However, the early Precambrian tectonic evolution history of the NCC is still controversial. Here we report Paleoproterozoic leucogranites, garnet granites and granulites in the Fengzhen area that constitutes a junction between the Khondalite Belt and the Trans-North China Orogen (TNCO). The leucogranites have high SiO 2 content (75–85 wt%), and magmatic zircon U-Pb age of 2199 ± 3 Ma. Their zircons have slightly various εHf (t) values (−0.45 to 1.41) with T DM model ages of 2.5–2.6 Ga. The granites show strong LREE enrichment with La/Yb cn ratio of 12–176, and have high initial Nd isotope (ε Nd(t) = 3.5–4.5). Most of them display positive Eu anomaly, excluding fractional crystallization contribution on the high Si feature. The leucogranite was produced by melting of Late Archean felsic TTGs (tonalite–trondhjemite–granodiorite) and addition of juvenile crust. Magmatic zircons yield the garnet granite age of 2002 ± 3 Ma. The zircons show various εHf (t) values (−5.8 to 7.1) and T DM model ages (2.1–2.6 Ga). Low initial ε Nd(t) isotope value (−4.2 to −8.3) was determined in the granites. The granulites are high pressure metamorphic rocks with a peak pressure of 12.0 ± 0.8 kbar, and have similar metamorphic age of 1967 ± 10 Ma to the garnet granites. This indicates that the Fengzhen area underwent 2-Ga inter-continental orogeny, in which the melting of sedimentary rock formed the garnet granites. Similarly, sodic TTG melting to form K-rich leucogranites also needs high pressure. However, the leucogranite age is obviously older than the peak metamorphic timing of continent–continent collision. This implies that the Fengzhen area may have underwent arc-continental collision at 2.2 Ga. [ABSTRACT FROM AUTHOR]
- Published
- 2017
- Full Text
- View/download PDF
10. Synthesis and characterization of organophosphine/phosphite stabilized silver(I) complexes bearing 2-acetyl-1,3-indandione ligand, crystal structure of [Ph3P·AgC11H7O3]
- Author
-
Wang, Ning, Tao, Xian, Du, Fang-Li, Feng, Meng, Jiang, Li-Na, and Shen, Ying-Zhong
- Subjects
- *
METAL complexes , *ORGANOSILVER compounds , *PHOSPHINE , *COMPLEX compounds synthesis , *LIGANDS (Chemistry) , *MOLECULAR structure , *NUCLEAR magnetic resonance spectroscopy , *THERMAL analysis - Abstract
Abstract: Six organophosphine/phosphite stabilized silver(I) complexes of 2-acetyl-1,3-indandione (2-AID) of type L n ·AgC11H7O3 (L=PPh3; n =1, 2a; n =2, 2b; L=P(OMe)3; n =1, 2c; n =2, 2d; L=P(OEt)3; n =1, 2e; n =2, 2f) have been prepared by reacting of [AgC11H7O3], which could be obtained by reacting of 2-AID with AgNO3, with triphenylphosphine, trimethylphosphite, or triethylphosphite in 1:1–2M ratio. These complexes were obtained in high yields and characterized by elemental analysis, 1H, 13C{H} NMR, IR spectroscopy, and thermal analysis (TG and DSC), respectively. The molecular structure of 2a has been determined by X-ray single crystal analysis in which the silver atom is in a distorted trigonal geometry. [Copyright &y& Elsevier]
- Published
- 2010
- Full Text
- View/download PDF
11. Effects of processing history and annealing on polymorphic structure of nylon-6/montmorillonite nanocomposites
- Author
-
Xie, Shaobo, Zhang, Shimin, Liu, Huiju, Chen, Guangming, Feng, Meng, Qin, Huaili, Wang, Fosong, and Yang, Mingshu
- Subjects
- *
ANNEALING of crystals , *CRYSTALS , *THERMAL properties , *POLYMORPHISM (Crystallography) , *NYLON - Abstract
Abstract: The effects of processing history and annealing treatment on the thermal property and polymorphic structure of nylon-6/clay nanocomposites (NCNs) have been investigated. The nanocomposites, including intercalated and exfoliated ones, were prepared by extruding nylon-6 (N6) with sodium montmorillonite (Na-MMT) or organo-montmorillonite (OMMT), respectively. DSC analysis revealed multiple melting endotherms in either the extruded or the injection-molded N6 and NCNs samples. It has been observed that a small exothermic peak around 195°C just before the lower melting peak in the skin regions. We demonstrated that this sub-T m transition was directly related to the processing-induced shear stresses. WAXD analysis was further performed to characterize the polymorphic structure of injection-molded N6 and NCNs before and after annealing. Annealing at a temperature (80°C) above the T g of N6 resulted in increase of the absolute content of γ-form in the skin regions and of the relative content of γ-form in the core regions of NCNs. In particular, annealing only leaded to increase the fraction of γ-form in the exfoliated N6/OMMT nanocomposites, which might be related to a confining effect of MMT platelet on the polymer chains mobility. [Copyright &y& Elsevier]
- Published
- 2005
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.