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Ultrasmall Lanthanide-doped NaMgF Nanocrystals: Controlled Synthesis and Optical Properties

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Chinese Journal of Structural Chemistry 2020年第11期39卷 2001-2008页

作者： LI Guo-Wei LIU Yong-Sheng jiang fei-long HONG Mao-Chun Fujian Normal University Fuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Orthorhombic-phase NaMgF3, composed of bio-friendly elements of Na, Mg and F, is considered to be an ideal host matrix for preparing trivalent lanthanide(Ln3+)-doped luminescent nanocrystals(NCs) with color-tunable emissions for diverse biological applications. However, the preparation and the survey on optical properties of ultrasmall(< 10 nm) Ln3+-doped NaMgF3 NCs remain nearly untouched to date. In this paper, we report a series of monodisperse Ln3+-doped orthorhombic-phase NaMgF3 NCs with an average size of ~10 nm that was synthesised by using a modified high-temperature co-precipitation method. Utilizing Eu3+ ion as an efficient optical/structural probe, the successful hetero-valence doping of Ln3+ ion into the lattice of NaMgF3 NCs is well-established irrespective of their different valences and radii between the host cation(e.g. Mg2+) and Ln3+ dopant. Benefiting from this, desirable upconversion luminescence(UCL) ranging from ultraviolet(UV) to visible and to near-infrared(NIR) spectral regions can be easily obtained after the doping of typical UCL couples of Yb3+/Er3+, Yb3+/Tm3+ and Yb3+/Ho3+ into the NaMgF3 NCs upon excitation by using a 980-nm diode laser.

关键词： NaMgF3 nanocrystals lanthanide ion upconversion luminescence ultrasmall

Synthesis and Crystal Structure of a 3-D Hydrogen-bonded Supramolecular Decavanadate Compound [Habo]_6[V_(10)O_(28)]·2C_3H_7OH·2H_2O

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Chinese Journal of Structural Chemistry 2005年第10期24卷 1186-1192页

作者： CHEN Lian LIN Zheng-Zhong jiang fei-long YUAN Da-Qiang HONG Mao-Chun State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

A new inorganic-organic hybrid supramolecular compound [Habo]6[V10O28]·2C3H7OH·2H2O 1 （abo = R（-）-2-amino-1-butanol） has been synthesized from VO2^＋ in organic solvents and its crystal structure was reported as follows： monoclinic, space group P21/n, a = 11.419（9）, b = 16.811（16）, c = 15.521（12） A, β= 102.98（2）°, V= 2903（4） A^3, Z = 4, C15H46N3O19V5, Mr = 827.25, Dc = 1.893 g/cm^3, 2（MoKα） = 0.71073 A, μ = 1.636 mm^-1, F（000） = 1696, the final R = 0.0696 and wR = 0.1361 for 4641 observed reflections with I 〉 2σ（I）. The compound is based on decavanadate clusters [V10O28]^6-. The hydrogen bonding interactions among Habo^＋ cations, solvents and decavanadate clusters extend 1 into a three-dimensional supramolecular architecture.

关键词： decavanadate hydrogen bond three-dimensional crystal structure

Syntheses and Crystal Structures of Two Isomeric Au Complexes

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Chinese Journal of Structural Chemistry 2010年第7期29卷 1001-1006页

作者： YUE Cheng-Yang YIN Xiang-Chen LI Bing-Chao jiang fei-long HONG Mao-Chun Department of Chemistry Jining University Qufu Shandong 273155 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 China

Two new isomeric Au complexes, Au（PPh3）（bmt）, have been synthesized via the reaction of Au（PPh3）CI with 2-benzimidazolethiol （Hbmt） in dichloromethane （CH2Cl2） solution. Their crystal structures were determined by elemental analysis and single-crystal X-ray diffraction studies. Complex 1 crystallizes in the monoclinic system, space group C2/c with a = 19.589（2）, b = 21.1368（15）, c = 23.424（2） A, β = 108.346（4）°, V= 9206.1（14） A3, Mr = 1216.85, Dc = 1.756 g/cm3, μ = 6.566 mm^-1, F（000） = 4704, Z = 8, the final R = 0.0563 and wR = 0.1028 for 8125 reflections with I 〉 2σ（I）. Complex 2 crystallizes in the monoclinic system, space group P21/n with a = 9.627（3）, b = 21.384（8）, c = 22.308（8） A, β = 92.068（6）°, V= 4590（3） A3, Mr = 1216.85, Dc = 1.761 g/cms, μ = 6.585 mm^-1, F（000） = 2352, Z = 4, the final R = 0.0500 and wR = 0.0883 for 10477 reflections with I 〉 2σ（i）. X-ray diffraction studies reveal that complexes 1 and 2 both feature a 1D chain along the a axis.

关键词： 2-benzimidazolethiol isomeric gold complex

Metal-induced Coordination Networks Using a C2v-based Hexacarboxylate Ligand:Syntheses, Structures and Properties

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Chinese Journal of Structural Chemistry 2019年第8期38卷 1370-1379页

作者： WAN Xiu-Yan ZHANG Guang-Lu CHEN Lian jiang fei-long HONG Mao-Chun College of Chemistry Chemical Engineering and Materials ScienceCollaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of ShandongShandong Normal UniversityJinan 250014China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Metal-organic frameworks(MOFs), consisting of metal, anion and organic ligands, have attracted much attention. The structure of MOFs is affected by various factors. To explore the effects of metal ions, we synthesized six complexes, namely {[Me2NH2][Zn4(H2L)(L)]·2 H2O·2 DMF}n(1), {[Me2NH2]2[Cd2(L)]·2H2O}n(2), {[Me2NH2]2[Ca3(L)(μ-OH)2(DMF)2]·2H2O}n(3) and {[Me2NH2]2[M2(L)(μ-OH)]· H2O·2DMF}n(M = Co, 4;Ni, 5;Mn, 6), from a C2v-based hexacarboxylate ligand([1,1’;4’,1’’]terphenyl-3,5,2’,5’,3’’,5’’-hexacarboxylic acid(H6L)) using metal-induced strategy. These MOFs were thoroughly characterized by single-crystal and X-ray diffraction, elemental analysis, Fourier-transform infrared spectra(FTIR) and photoluminescence.

关键词： metal-induced syntheses structures photoluminescence properties

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基于CFD流场模拟的烧结烟气脱硝系统优化

中国环保产业 2024年第8期 43-48页

作者：李旺赵雯雯吴远翔李重玖蒋龙飞武汉华德环保工程技术有限公司武汉430080

通过CFD对某钢厂220m^(2)烧结机烟气选择性催化还原法(SCR)脱硝系统进行模拟,结果表明,双层多区域高温喷射装置能快速使高低温烟气混合温度趋于一致,满足催化剂对温度的要求。采用混合器、导流板及整流格栅能显著提高催化剂入口烟气的... 详细信息

通过CFD对某钢厂220m^(2)烧结机烟气选择性催化还原法(SCR)脱硝系统进行模拟,结果表明,双层多区域高温喷射装置能快速使高低温烟气混合温度趋于一致,满足催化剂对温度的要求。采用混合器、导流板及整流格栅能显著提高催化剂入口烟气的混合均匀性,催化剂入口上游200mm处速度CV值为10.5%、氨氮浓度分布CV值为5%、入射角度分布值为6°、温度分布值为±3℃,均达到流场模拟要求。

关键词：选择性催化还原法流场模拟烧结烟气离散系数

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Ultra-microporous Metal-organic Framework with High Concentration of Free Carboxyl Groups and Lewis Basic Sites for CO_2 Capture at Ambient Conditions

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Chinese Journal of Structural Chemistry 2019年第4期38卷 559-565页

作者： LIANG Lin-Feng jiang fei-long CHEN Qi-Hui YUAN Da-Qiang HONG Mao-Chun Department of Chemistry University of Science and Technology of China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

How to rationally design effective and practical CO_2 adsorbent is a great challenge. Herein, an ultra-microporous metal-organic framework(FJI-H19) with high concentration of free carboxyl groups and uncoordinated Lewis basic sites has been synthesized from a multi-dental ligand with a high proportion of polar CO_2-philic atoms. FJI-H19 displays a relatively high CO_2 volumetric uptake(120 cm^3?cm^(–3)) with high selectivity under practical atmosphere(298 K and 1 bar). Further researches demonstrate that such high adsorption results from an unusual synergistic effect from free carboxyl group and uncoordinated N atoms. This result will provide a potential strategy for developing more effective and pratical CO_2 adsorbent based on MOFs.

关键词： metal-organic framework adsorption carbon dioxide free carboxyl group synergistic effect

A Novel Co(Ⅱ)-organic Framework with Multiple Active Sites for Selective Gas Adsorption

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Chinese Journal of Structural Chemistry 2021年第2期40卷 169-174,145页

作者： SHI Cheng-Dan TIAN Jia-Yue jiang fei-long CHEN Qi-Hui HONG Mao-Chun College of Chemistry and Materials Science Fujian Normal UniversityFuzhou 350007China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

A novel metal-organic framework[Co(BTTA)(H_(2)O)_(2)]_(n)(FJI-H_(2)4)has been prepared from H_(2)BTTA ligand and CoCl_(2),and its structure was determined by single-crystal X-ray diffraction,thermogravimetric analysis,and Fourier transform infrared *** has relatively narrow pores and high density of open metal ions and free Lewis base *** adsorption tests demonstrate that FJI-H_(2)4 has moderate CO_(2)(34.0 cm^(3)·g^(–1))and C_(2)H_(2)(53.0 cm^(3)·g^(–1))adsorption capacity,but displays high selectivity of CO_(2)/N_(2)(87)and C_(2)H_(2)/CH_(4)(66)under ambient conditions(298 K,1 atm),which may be attributed to its relatively narrow pores and polar *** work will provide a potential strategy for preparing practical porous metal-organic frameworks for gas adsorption and purification.

关键词： metal-organic frameworks gas adsorption gas purification open metal ions Lewis base sites

Experimental Study on Wire Melting Control Ability of Twin-Body Plasma Arc

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Chinese Journal of Mechanical Engineering 2024年第2期37卷 184-194页

作者： Ruiying Zhang Fan jiang long Xue School of Mechanical Engineering Beijing Institute of Petrochemical TechnologyBeijing 102617China Beijing Academy of Safety Engineering and Technology Beijing 102617China College of Mechanical and Energy Engineering Beijing University of TechnologyBeijing 100124China

The twin-body plasma arc has the decoupling control ability of heat transfer and mass transfer,which is beneficial to shape and property control in wire arc additive *** this paper,with the wire feeding speed as a characteristic quantity,the wire melting control ability of twin-body plasma arc was studied by adjusting the current separation ratio(under the condition of a constant total current),the wire current/main current and the position of the wire in the arc axial *** results showed that under the premise that the total current remains unchanged(100 A),as the current separation ratio increased,the middle and minimum melting amounts increased approximately synchronously under the effect of anode effect power,the first melting mass range remained constant;the maximum melting amount increased twice as fast as the middle melting amount under the effect of the wire feeding speed,and the second melting mass range was *** the wire current increased,the anode effect power and the plasma arc power were both factors causing the increase in the wire melting amount;however,when the main current increased,the plasma arc power was the only factor causing the increase in the wire melting *** average wire melting increment caused by the anode effect power was approximately 2.7 times that caused by the plasma arc *** minimum melting amount was not affected by the wire-torch distance under any current separation ratio *** the current separation ratio increased and reached a threshold,the middle melting amount remained constant with increasing wire-torch *** the current separation ratio continued to increase and reached the next threshold,the maximum melting amount remained constant with the increasing wire-torch *** effect of the wire-torch distance on the wire melting amount reduced with the increase in the current separation *** this study,the decoupling mechanism and ability of this innovative

关键词： Twin-body plasma arc Melting control ability Melting amount Current separation ratio

Synthetic and structural chemistry of hexacobalt cluster compounds——Ⅱ. Preparation and structure of Co_6(μ_3-S)_8(Ph_2PCH_2P(O)Ph_2)_6

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Chinese Journal of Chemistry 1991年第5期9卷 425-429页

作者： HONG Mao-Chun HUANG Zhi-Ying LEI Xin-Jian KANG Bei-Sheng jiang fei-long LIU Han-Qin Fuzhou Laboratory of Structural Chemistry and Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhouFuijan 350002

Co_6(μ_3-S)_8(Ph_2PCH_2P(O)Ph_2)_6, MW=3012.5, space group R, has the hexagonal parameters, a=26.764(10), c=16.979 (10), V=10532.8~3, Z=3. Mo Kα radiation, λ= 0.71069, Dc=1.425 g/cm^3, μ=9.94 cm^(-3), F(000)=4650, R=0.073 and Rw=0.077 for 1965 observed unique reflections with I>3σ(I). The molecular structure consists of a distorted octahed- ral Co_6-core. The Co-Co and Co-S distances fall in the range of 2.805-2.838 and 2.213-2.253, respectively.

关键词： Co Ph2PCH2P O)Ph2 Preparation and structure of Co6 Synthetic and structural chemistry of hexacobalt cluster compounds PCH