共查询到20条相似文献,搜索用时 11 毫秒
1.
Ji Woong Yoon Dr. You‐Kyong Seo Young Kyu Hwang Dr. Jong‐San Chang Dr. Hervé Leclerc Stefan Wuttke Dr. Philippe Bazin Alexandre Vimont Dr. Marco Daturi Prof. Emily Bloch Dr. Philip L. Llewellyn Dr. Christian Serre Dr. Patricia Horcajada Dr. Jean‐Marc Grenèche Dr. Alirio E. Rodrigues Prof. Gérard Férey Prof. 《Angewandte Chemie (International ed. in English)》2010,49(34):5949-5952
2.
Structural Transformation and Hysteretic Sorption of Light Hydrocarbons in a Flexible Zn–Pyrazole–Adenine Framework
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Hong‐Ru Fu Prof. Dr. Jian Zhang 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(15):5700-5703
A three‐dimensional metal–organic framework (MOF) was synthesized by combining 4‐pyrazolecarboxylic acid and adenine. This MOF exhibits reversible flexibility and breathing adsorption behaviors in response to light hydrocarbons, with high capacity. The flexibility of the structural transitions was studied on the molecular scale by obtaining the crystal structures at 303, 353 and 373 K. The bridging nitrogen atoms of the pyrazolate rings act as a “kneecap” around the M???M axis, which causes the rotation of ligands around the M???M axis in response to external stimulus, thus giving rise to the deformation of the framework structure. 相似文献
3.
通过简单的一步碳化方法, 以含氮的多孔有机骨架JUC-Z2为碳前驱物制备出氮掺杂多孔碳材料. 与原始JUC-Z2材料相比, 制备的多孔碳材料显示出明显提高的气体吸附量和增强的吸附焓. 其中JUC-Z2-900的CO2吸附量高达113 cm3·g-1, H2吸附量也达到246 cm3·g-1, 超过了大部分报道的多孔材料. 尤其是JUC-Z2-900的CH4吸附量在273 K, 1 bar下高达60 cm3·g-1, 据我们所知, 这一值为目前报道材料的最高值. 除此之外, 样品还显示出选择性吸附CO2的能力, 273 K下, JUC-Z2-900的CO2/N2的选择性高达10, CO2/H2的选择性也高达66. 另外, 样品具有很高的热稳定性, 有望应用在碳捕获和清洁能源储存等领域. 相似文献
4.
Sudarat Yadnum Dr. Jérome Roche Eric Lebraud Philippe Négrier Patrick Garrigue Dr. Darren Bradshaw Dr. Chompunuch Warakulwit Prof. Jumras Limtrakul Prof. Alexander Kuhn 《Angewandte Chemie (International ed. in English)》2014,53(15):4001-4005
Herein, bipolar electrochemistry is applied in a straightforward way to the site‐selective in situ synthesis of metal–organic framework (MOF) structures, which have attracted tremendous interest in recent years because of their significant application potential, ranging from sensing to gas storage and catalysis. The novelty of the presented work is that the deposit can be intentionally confined to a defined area of a substrate without using masks or templates. The intrinsic site‐selectivity of bipolar electrochemistry makes it a method of choice to generate, in a highly controlled way, hybrid particles that may have different functionalities combined on the same particle. The wireless nature of electrodeposition allows the potential for mass production of such Janus‐type objects. 相似文献
5.
Ji Woong Yoon Dr. You‐Kyong Seo Young Kyu Hwang Dr. Jong‐San Chang Dr. Hervé Leclerc Stefan Wuttke Dr. Philippe Bazin Alexandre Vimont Dr. Marco Daturi Prof. Emily Bloch Dr. Philip L. Llewellyn Dr. Christian Serre Dr. Patricia Horcajada Dr. Jean‐Marc Grenèche Dr. Alirio E. Rodrigues Prof. Gérard Férey Prof. 《Angewandte Chemie (International ed. in English)》2010,49(34):5804-5804
6.
Electrochemical Exfoliation of Pillared‐Layer Metal–Organic Framework to Boost the Oxygen Evolution Reaction
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Jin Huang Yun Li Rui‐Kang Huang Dr. Chun‐Ting He Dr. Li Gong Qiong Hu Prof. Lishi Wang Yan‐Tong Xu Xiao‐Yun Tian Dr. Si‐Yang Liu Zi‐Ming Ye Fuxin Wang Dr. Dong‐Dong Zhou Dr. Wei‐Xiong Zhang Prof. Jie‐Peng Zhang 《Angewandte Chemie (International ed. in English)》2018,57(17):4632-4636
Two‐dimensional (2D) materials and ultrathin nanosheets are advantageous for elevating the catalysis performance and elucidating the catalysis mechanism of heterogeneous catalysts, but they are mostly restricted to inorganic or organic materials based on covalent bonds. We report an electrochemical/chemical exfoliation strategy for synthesizing metal–organic 2D materials based on coordination bonds. A catechol functionalized ligand is used as the redox active pillar to construct a pillared‐layer framework. When the 3D pillared‐layer MOF serves as an electrocatalyst for water oxidation (pH 13), the pillar ligands can be oxidized in situ and removed. The remaining ultrathin (2 nm) nanosheets of the metal–organic layers are an efficient catalyst with overpotentials as low as 211 mV at 10 mA cm?2 and a turnover frequency as high as 30 s?1 at an overpotential of 300 mV. 相似文献
7.
Dr. Hai‐Wei Kuai Dr. Xiao‐Chun Cheng Liang‐Dong Feng Xiao‐Hong Zhu 《无机化学与普通化学杂志》2011,637(11):1560-1565
Three new complexes: [M(L)(H2O)] [M = Zn ( 1 ), Co ( 2 ), Ni ( 3 ); H2L = 5‐(pyridin‐2‐ylmethyl)aminoisophthalic acid] were synthesized under hydrothermal conditions at 180 °C and were characterized by elemental analysis, FT‐IR spectroscopy, single‐crystal X‐ray diffraction, and thermogravimetric analysis (TGA). The results of X‐ray diffraction analysis reveal that complexes 1 – 3 are isostructural and crystallize in the monoclinic system with space group P21/c. Each of the complexes displays a (3,3′)‐connected two‐dimensional (2D) wave‐like network with (4,82) topology, within which five‐membered uncoplanar N,N‐chelated metallacycles are shaped. Delicate N–H ··· O and O–H ··· O hydrogen bonding interactions exist in complexes 1 – 3 . Adjacent 2D layers are linked by intermolecular interactions, resulting in the construction of extended metal‐organic frameworks (MOFs) in complexes 1 and 2 . 相似文献
8.
Solvent‐free Synthesis,Characterization and Solvent‐Vapor Interaction of Zinc(II) and Copper(II) Coordination Polymers containing Nitrogen‐donor Ligands
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Coordination polymers of [Zn(INA)2] ( 1 ) (INA = isonicotinate), [Cu2(mal)2(H2O)2(bipy)] ( 2 ) (mal = malonate, bipy = 4,4‐bipyridine), and [Zn2(OAC)4(bipy)2] ( 3 ) (OAC = acetate) were prepared using mechanochemical grinding and heating methods. The materials were characterized with elemental analysis, FT‐IR spectroscopy, TGA, SEM, EI‐MS, BET, and PXRD. Comparison of PXRD patterns of the materials with patterns simulated from single‐crystal X‐ray diffraction data allowed identification of the products. Compared to conventional synthetic techniques such as solvothermal/hydrothermal solvent‐based methods, solvent‐free method was found to be simple, highly efficient, and environmentally friendly especially for the preparation of these coordination polymers on a large scale. Solvent‐vapor interaction properties of 1 , 2 , and 3 were investigated by exposure of the compounds to water and methanol at room temperature. 相似文献
9.
Dr. Man‐Sheng Chen Xiong‐Wen Tan Dr. Chun‐Hua Zhang Dai‐Zhi Kuang 《无机化学与普通化学杂志》2011,637(9):1220-1223
A new three‐dimensional (3D) porous framework [Zn(INAIP)] · DMA · H2O ( 1 ) [INAIP = 5‐(isonicotinamido)isophthalate, DMA = N,N′‐dimethylacetamide] was synthesized by solvothermal methods and characterized by single‐crystal and powder X‐ray diffraction, as well as thermogravimetric analysis. The results of X‐ray diffraction analyses revealed that complex 1 has an unusual 3D architecture with the (3,6)‐connected rutile ( rtl ) topology. The adsorption behavior shows that compound 1 exhibits selective adsorptions of CO2 over N2 after the removal of the solvent molecules within the pores. 相似文献
10.
A new and rapid solvent‐free synthesis of heterocyclic thioureas in a microwave oven has been reported for the first time. Nine heterocyclic thioureas that possess biological activity have been synthesized. The reaction time is short (2–4.5 min) and gives excellent yields (82.9–95.5%). 相似文献
11.
Structural Optimization of Interpenetrated Pillared‐Layer Coordination Polymers for Ethylene/Ethane Separation
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Keisuke Kishida Dr. Satoshi Horike Yoshihiro Watanabe Mina Tahara Yasutaka Inubushi Prof. Susumu Kitagawa 《化学:亚洲杂志》2014,9(6):1643-1647
With the goal of achieving effective ethylene/ethane separation, we evaluated the gas sorption properties of four pillared‐layer‐type porous coordination polymers with double interpenetration, [Zn2(tp)2(bpy)]n ( 1 ), [Zn2(fm)2(bpe)]n ( 2 ), [Zn2(fm)2(bpa)]n ( 3 ), and [Zn2(fm)2(bpy)]n ( 4 ) (tp=terephthalate, bpy=4,4′‐bipyridyl, fm=fumarate, bpe=1,2‐di(4‐pyridyl)ethylene and bpa=1,2‐di(4‐pyridyl)ethane). It was found that 4 , which contains the narrowest pores of all of these compounds, exhibited ethylene‐selective sorption profiles. The ethylene selectivity of 4 was estimated to be 4.6 at 298 K based on breakthrough experiments using ethylene/ethane gas mixtures. In addition, 4 exhibited a good regeneration ability compared with a conventional porous material. 相似文献
12.
Franziska Debatin Arne Thomas Prof. Dr. Alexandra Kelling Niklas Hedin Dr. Zoltan Bacsik Dr. Irena Senkovska Dr. Stefan Kaskel Prof. Dr. Matthias Junginger Holger Müller Uwe Schilde Prof. Dr. Christian Jäger Prof. Dr. Alwin Friedrich Dr. Hans‐Jürgen Holdt Prof. Dr. 《Angewandte Chemie (International ed. in English)》2010,49(7):1258-1262
13.
A Rod‐Packing Microporous Hydrogen‐Bonded Organic Framework for Highly Selective Separation of C2H2/CO2 at Room Temperature
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Peng Li Dr. Yabing He Dr. Yunfeng Zhao Prof. Dr. Linhong Weng Dr. Hailong Wang Prof. Dr. Rajamani Krishna Prof. Dr. Hui Wu Prof. Dr. Wei Zhou Prof. Dr. Michael O'Keeffe Prof. Dr. Yu Han Prof. Dr. Banglin Chen 《Angewandte Chemie (International ed. in English)》2015,54(2):574-577
Self‐assembly of a trigonal building subunit with diaminotriazines (DAT) functional groups leads to a unique rod‐packing 3D microporous hydrogen‐bonded organic framework (HOF‐3). This material shows permanent porosity and demonstrates highly selective separation of C2H2/CO2 at ambient temperature and pressure. 相似文献
14.
Evidence of Amine–CO2 Interactions in Two Pillared‐Layer MOFs Probed by X‐ray Crystallography
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Xiao‐Li Hu Qi‐Han Gong Rong‐Lin Zhong Prof. Xin‐Long Wang Prof. Chao Qin Hao Wang Prof. Jing Li Kui‐Zhan Shao Prof. Zhong‐Min Su 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(19):7238-7244
Two pillared‐layer metal–organic frameworks (MOFs; PMOF‐55 and NH2‐PMOF‐55) based on 1,2,4‐triazole and terephthalic acid (bdc)/NH2‐bdc ligands were assembled and display framework stabilities, to a certain degree, in both acid/alkaline solutions and toward water. They exhibit high CO2 uptakes and selective CO2/N2 adsorption capacities, with CO2/N2 selectivity in the range of 24–27, as calculated by the ideal adsorbed solution theory method. More remarkably, the site and interactions between the host network and the CO2 molecules were investigated by single‐crystal X‐ray diffraction, which showed that the main interaction between the CO2 molecules and PMOF‐55 is due to multipoint supramolecular interactions of C?H???O, C???O, and O???O. Amino functional groups were shown to enhance the CO2 adsorption and identified as strong adsorption sites for CO2 by X‐ray crystallography. 相似文献
15.
An efficient process has been developed for the synthesis of 2,2,4‐trisubstituted‐1,2‐dihydroquinolines in good yields through a simple one‐pot condensation between anilines and ketones in the presence of zinc triflate as a catalyst at room temperature under solvent‐free conditions. 相似文献
16.
Zhongshang Dou Jianfeng Cai Yuanjing Cui Jiancan Yu Tifeng Xia Yu Yang Guodong Qian 《无机化学与普通化学杂志》2015,641(5):792-796
Continuous and intergrown metal‐organic framework (MOF) membranes, MIL‐100(In) (MIL represents Materials Institute Lavoisier), were prepared directly on porous anodic alumina oxide (AAO) membranes using an in situ crystallization method. The pore surface of MIL‐100(In) is conferred with polarity due to the presence of the 1, 3,5‐benzenetricarboxylic acid. The thickness of MIL‐100(In) membranes was tuned by varying the reactant concentration of indium chloride and 1, 3,5‐benzenetricarboxylic acid. Single gas permeation measurements on this MOF membrane indicate the large permeances of 0.90 × 10–6 and 0.81 × 10–6 mol · m–2·s–1·Pa–1 for CO2 and CH4, and relatively high ideal selective factors of 3.75 and 3.38 for CO2/N2 and CH4/N2, respectively. 相似文献
17.
18.
Huanhuan Li Dr. Wei Shi Kaina Zhao Zheng Niu Huimin Li Prof. Dr. Peng Cheng 《Chemistry (Weinheim an der Bergstrasse, Germany)》2013,19(10):3358-3365
A rare, robust microporous lanthanide metal–organic framework with 1D honeycomb‐type channels is presented. Excellent adsorption capabilities for N2, H2, and CO2 and significant selective sorption of CO2 over N2 and CH4 were observed. Moreover, the guest‐dependent luminescent behavior of these lanthanide materials shows a potential use for the sensing of small‐molecule pollutants such as benzene and acetone. 相似文献
19.
Influence of Solvent‐Like Sidechains on the Adsorption of Light Hydrocarbons in Metal–Organic Frameworks
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Andreas Schneemann Dr. Eric D. Bloch Dr. Sebastian Henke Dr. Philip L. Llewellyn Prof. Dr. Jeffrey R. Long Prof. Dr. Roland A. Fischer 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(51):18764-18769
A variety of strategies have been developed to adsorb and separate light hydrocarbons in metal–organic frameworks. Here, we present a new approach in which the pores of a framework are lined with four different C3 sidechains that feature various degrees of branching and saturation. These pendant groups, which essentially mimic a low‐density solvent with restricted degrees of freedom, offer tunable control of dispersive host–guest interactions. The performance of a series of frameworks of the type Zn2(fu‐bdc)2(dabco) (fu‐bdc2?=functionalized 1,4‐benzenedicarboxylate; dabco=1,4‐diazabicyclo[2.2.2]octane), which feature a pillared layer structure, were investigated for the adsorption and separation of methane, ethane, ethylene, and acetylene. The four frameworks exhibit low methane uptake, whereas C2 hydrocarbon uptake is substantially higher as a result of the enhanced interaction of these molecules with the ligand sidechains. Most significantly, the adsorption quantities and selectivity were found to depend strongly upon the type of sidechains attached to the framework scaffold. 相似文献
20.
Supramolecular Open‐Framework of a Bipyridinium‐Carboxylate Based Copper Complex with High and Reversible Water Uptake
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Maxime Leroux Guy Weber Jean‐Pierre Bellat Igor Bezverkhyy Nicolas Mercier 《无机化学与普通化学杂志》2016,642(24):1439-1444
The rigid zwitterionic ligand 1,1′‐bis(4‐carboxylatphenyl)‐(4,4′‐bipyridinium) (pc1) and copper(II) ions give rise to a linear complex [Cu(pc1)2(H2O)4]2+, which self assembles in a pseudo tetragonal supramolecular arrangement leading to the supramolecular open‐framework [Cu(pc1)2(H2O)4](Cl)2 · 8H2O exhibiting an open structure including water molecules and chlorides in pores. The dehydration of this material occurs at relatively low temperature (70 °C) and results in structure modification accompanied by shrinking of the crystals. Characterization of the obtained material by FT‐IR spectroscopy reveals appearance of coordinated carboxylates groups, which may indicate the formation of coordination polymer after dehydration. Water adsorption (maximum uptake 0.23 g H2O per g) on dehydrated material allows to restore the initial structure. A large hysteresis in water adsorption‐desorption isotherm is characteristic of a significant modification of the structure during the hydration‐dehydration cycle which is in line with the structural transition determined from thermodiffractometry and FT‐IR spectroscopy. 相似文献