共查询到20条相似文献,搜索用时 11 毫秒
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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
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JiWoong Yoon You‐Kyong Seo YoungKyu Hwang Jong‐San Chang Herv Leclerc Stefan Wuttke Philippe Bazin Alexandre Vimont Marco Daturi Emily Bloch PhilipL. Llewellyn Christian Serre Patricia Horcajada Jean‐Marc Grenche AlirioE. Rodrigues Grard Frey 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2010,122(34):5940-5940
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Xiao‐Ming Lin Ting‐Ting Li Yi‐Wei Wang Prof. Dr. Li Zhang Prof. Dr. Cheng‐Yong Su 《化学:亚洲杂志》2012,7(12):2796-2804
Assembly of Zn(NO3)2 with the tripodal ligand H3TCPB (1,3,5‐tri(4‐carboxyphenoxy)benzene) affords two porous isoreticular metal‐organic frameworks, [Zn3(TCPB)2?2DEF]? 3DEF ( 1 ) and [Zn3(TCPB)2?2H2O]? 2H2O?4DMF ( 2 ). Single‐crystal X‐ray diffraction analyses reveal that 1 crystallizes in the monoclinic space group P21/c and possesses a 2D network containing 1D microporous opening channels with an effective size of 3.0×2.9 Å2, whereas 2 crystallizes in the trigonal space group c1 and also possesses a 2D network containing 1D channels, with an effective aperture of 4.0×4.0 Å2. TOPOS analysis reveals that both 1 and 2 have a (3,6)‐connected network topology with the Schläfli symbol of (43?612) (43)2. According to the variable‐temperature powder X‐ray diffraction patterns, the solid phase of 1 can be converted into that of 2 during a temperature‐induced dynamic structural transformation, thus indicating that the framework of 2 represents the most thermally stable polymorph. Desolvated 2 exhibits highly selective adsorption behaviors toward H2/N2, CO2/N2, and CO2/CH4; furthermore, it displays size‐selective catalytic activity towards carbonyl cyanosilylation and Henry (nitroaldol) reactions. 相似文献
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Huanhuan Li Dr. Wei Shi Kaina Zhao Zheng Niu Xitong Chen Prof. Dr. Peng Cheng 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(18):5715-5723
A robust porous metal–organic framework (MOF), [Co3(ndc)(HCOO)3(μ3‐OH)(H2O)]n ( 1 ) (H2ndc=5‐(4‐pyridyl)‐isophthalic acid), was synthesized with pronounced porosity. MOF 1 contained two different types of nanotubular channels, which exhibited a new topology with the Schlafli symbol of {42.65.83}{42.6}. MOF 1 showed high‐efficiency for the selective sorption of small molecules, including the energy‐correlated gases of H2, CH4, and CO2, and environment‐correlated steams of alcohols, acetone, and pyridine. Gas‐sorption experiments indicated that MOF 1 exhibited not only a high CO2‐uptake (25.1 wt % at 273 K/1 bar) but also the impressive selective sorption of CO2 over N2 and CH4. High H2‐uptake (2.04 wt % at 77 K/1 bar) was also observed. Moreover, systematic studies on the sorption of steams of organic molecules displayed excellent capacity for the sorption of the homologous series of alcohols (C1–C5), acetone, pyridine, as well as water. 相似文献
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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
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Intercalation of Coordinatively Unsaturated FeIII Ion within Interpenetrated Metal–Organic Framework MOF‐5 下载免费PDF全文
Rebecca J. Holmberg Thomas Burns Samuel M. Greer Dr. Libor Kobera Dr. Sebastian A. Stoian Dr. Ilia Korobkov Prof. Stephen Hill Prof. David L. Bryce Prof. Tom K. Woo Prof. Muralee Murugesu 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(23):7711-7715
Coordinatively unsaturated FeIII metal sites were successfully incorporated into the iconic MOF‐5 framework. This new structure, FeIII‐iMOF‐5, is the first example of an interpenetrated MOF linked through intercalated metal ions. Structural characterization was performed with single‐crystal and powder XRD, followed by extensive analysis by spectroscopic methods and solid‐state NMR, which reveals the paramagnetic ion through its interaction with the framework. EPR and Mössbauer spectroscopy confirmed that the intercalated ions were indeed FeIII, whereas DFT calculations were employed to ascertain the unique pentacoordinate architecture around the FeIII ion. Interestingly, this is also the first crystallographic evidence of pentacoordinate ZnII within the MOF‐5 SBU. This new MOF structure displays the potential for metal‐site addition as a framework connector, thus creating further opportunity for the innovative development of new MOF materials. 相似文献
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Defect‐Controlled Preparation of UiO‐66 Metal–Organic Framework Thin Films with Molecular Sieving Capability 下载免费PDF全文
Caiqin Zhang Yajing Zhao Yali Li Prof. Xuetong Zhang Prof. Lifeng Chi Prof. Guang Lu 《化学:亚洲杂志》2016,11(2):207-210
Metal–organic framework (MOF) UiO‐66 thin films are solvothermally grown on conducting substrates. The as‐synthesized MOF thin films are subsequently dried by a supercritical process or treated with polydimethylsiloxane (PDMS). The obtained UiO‐66 thin films show excellent molecular sieving capability as confirmed by the electrochemical studies for redox‐active species with different sizes. 相似文献
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Microporous metal–organic frameworks (MOFs) are comparatively new porous materials. Because the pores within such MOFs can be readily tuned through the interplay of both metal‐containing clusters and organic linkers to induce their size‐selective sieving effects, while the pore surfaces can be straightforwardly functionalized to enforce their different interactions with gas molecules, MOF materials are very promising for gas separation. Furthermore, the high porosities of such materials can enable microporous MOFs with optimized gas separation selectivity and capacity to be targeted. This Focus Review highlights recent significant advances in microporous MOFs for gas separation. 相似文献
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Flexible and Hierarchical Metal–Organic Framework Composites for High‐Performance Catalysis 下载免费PDF全文
Dr. Ning Huang Hannah Drake Jialuo Li Dr. Jiandong Pang Dr. Ying Wang Shuai Yuan Qi Wang Peiyu Cai Dr. Junsheng Qin Prof. Dr. Hong‐Cai Zhou 《Angewandte Chemie (International ed. in English)》2018,57(29):8916-8920
The development of porous composite materials is of great significance for their potentially improved performance over those of individual components and extensive applications in separation, energy storage, and heterogeneous catalysis. Now mesoporous metal–organic frameworks (MOFs) with macroporous melamine foam (MF) have been integrated using a one‐pot process, generating a series of MOF/MF composite materials with preserved crystallinity, hierarchical porosity, and increased stability over that of melamine foam. The MOF nanocrystals were threaded by the melamine foam networks, resembling a ball‐and‐stick model overall. The resulting MOF/MF composite materials were employed as an effective heterogeneous catalyst for the epoxidation of cholesteryl esters. Combining the advantages of interpenetrative mesoporous and macroporous structures, the MOF/melamine foam composite has higher dispersibility and more accessibility of catalytic sites, exhibiting excellent catalytic performance. 相似文献
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Junkuo Gao Xuefeng Qian Rui‐Biao Lin Rajamani Krishna Hui Wu Wei Zhou Banglin Chen 《Angewandte Chemie (International ed. in English)》2020,59(11):4396-4400
The separation of C2H2/CO2 is particularly challenging owing to their similarities in physical properties and molecular sizes. Reported here is a mixed metal–organic framework (M′MOF), [Fe(pyz)Ni(CN)4] ( FeNi‐M′MOF , pyz=pyrazine), with multiple functional sites and compact one‐dimensional channels of about 4.0 Å for C2H2/CO2 separation. This MOF shows not only a remarkable volumetric C2H2 uptake of 133 cm3 cm?3, but also an excellent C2H2/CO2 selectivity of 24 under ambient conditions, resulting in the second highest C2H2‐capture amount of 4.54 mol L?1, thus outperforming most previous benchmark materials. The separation performance of this material is driven by π–π stacking and multiple intermolecular interactions between C2H2 molecules and the binding sites of FeNi‐M′MOF . This material can be facilely synthesized at room temperature and is water stable, highlighting FeNi‐M′MOF as a promising material for C2H2/CO2 separation. 相似文献
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Mediating Order and Modulating Porosity by Controlled Hydrolysis in a Phosphonate Monoester Metal–Organic Framework 下载免费PDF全文
Benjamin S. Gelfand Racheal P. S. Huynh Roger K. Mah Prof. George K. H. Shimizu 《Angewandte Chemie (International ed. in English)》2016,55(47):14614-14617
A crystalline and permanently porous copper phosphonate monoester framework has been synthesized from a tetraaryl trigonal phosphonate monoester linker. This material has a surface area over 1000 m2 g?1, as measured by N2 sorption, the highest reported for a phosphonate‐based metal–organic framework (MOF). The monoesters result in hydrophobic pore surfaces that give a low heat of adsorption for CO2 and low calculated selectivity for CO2 over N2 and CH4 in binary mixtures. By careful manipulation of synthetic conditions, it is possible to selectively remove some of the monoesters lining the pore to form a hydrogen phosphonate while giving an isomorphous structure. This increases the affinity of the framework for CO2 giving higher ambient uptake, higher heat of adsorption, and much higher calculated selectivity for CO2 over both N2 and CH4. Formation of the acid groups is noteworthy as complexation with the parent acid gives a different structure. 相似文献
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Dr. Shun‐Li Li Dr. Ya‐Qian Lan Dr. Hiroaki Sakurai Prof. Dr. Qiang Xu 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(51):16302-16309
Desulfurization of fuels is receiving more and more attention all over the world due to the increase of stringent environmental regulations and fuel specifications. The metal–organic framework (MOF) is a new class of crystalline materials, and high porosity, one of the most important properties of MOFs, plays a central role in the functional properties. However, the investigation of MOFs, being employed as sorbents for adsorptive desulfurization, is still scarce. In this regard, we have constructed a new 3D porous compound 1 by using rigidly designed carboxylate ligands, which, for the first time, exhibit an unusual triple molecular necklace‐like helix. The N2 sorption isotherms of 1 show that it has a large Brunauer–Emmett–Teller (BET) surface area and pore volume. With the stable pore structure and appropriate pore sizes, compound 1 has been used as a sorbent for adsorptive desulfurization. The results indicate that compound 1 shows an excellent adsorption property and, more importantly, displays excellent stability, repeatability, and regenerability. Thus, the design and synthesis of targeted MOFs with appropriate pore size and increased interactions between organosulfur compounds and ligands/metals from MOFs is crucial for adsorptive desulfurization, which might be an effective guide to find an efficient and green adsorbent for desulfurization. 相似文献
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Beibei Zhou Tengwu Zeng Zhao‐Lin Shi Gen Zhang Satoshi Horike Yue‐Biao Zhang 《化学:亚洲杂志》2019,14(20):3552-3556
The function of allosteric enzymes can be activated or inhibited through binding of specific effector molecules. Herein, we describe how the skeletal deformation, pore configuration, and ultimately adsorptive behavior of a dynamic metal–organic framework (MOF), (Me2NH2)[In(atp)]2 (in which atp=2‐aminoterephthalate), are controlled by the allocation and orientation of its counter ions triggered by the inclusion/removal of different guest molecules. The power of such allosteric control in MOFs is highlighted through the optimization of the hydrocarbon separation performance by achieving multiple pore configurations but without altering the chemical composition. 相似文献
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Jun Liang Alexander Nuhnen Simon Millan Hergen Breitzke Vasily Gvilava Gerd Buntkowsky Christoph Janiak 《Angewandte Chemie (International ed. in English)》2020,59(15):6068-6073
We present a facile approach to encapsulate functional porous organic cages (POCs) into a robust MOF by an incipient‐wetness impregnation method. Porous cucurbit[6]uril (CB6) cages with high CO2 affinity were successfully encapsulated into the nanospace of Cr‐based MIL‐101 while retaining the crystal framework, morphology, and high stability of MIL‐101. The encapsulated CB6 amount is controllable. Importantly, as the CB6 molecule with intrinsic micropores is smaller than the inner mesopores of MIL‐101, more affinity sites for CO2 are created in the resulting CB6@MIL‐101 composites, leading to enhanced CO2 uptake capacity and CO2/N2, CO2/CH4 separation performance at low pressures. This POC@MOF encapsulation strategy provides a facile route to introduce functional POCs into stable MOFs for various potential applications. 相似文献
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Ana E. Platero‐Prats Dr. Víctor A. de la Peña‐O'Shea Dr. Natalia Snejko Prof. Ángeles Monge Prof. Enrique Gutiérrez‐Puebla 《Chemistry (Weinheim an der Bergstrasse, Germany)》2010,16(38):11632-11640
Herein, we present a Ca‐based metal–organic framework named AEPF‐1, which is an active and selective catalyst in olefin hydrogenation reactions. AEPF‐1 exhibits a phase transition upon desorption of guest molecules. This structural transformation takes place by a crystal to crystal transformation accompanied by the loss of single‐crystal integrity. Powder diffraction methods and computational studies were applied to determine the structure of the guest‐free phase. This work also presents data on the exceptional adsorption behavior of this material, which is shown to be capable of separating polar from nonpolar organic solvents, and is a good candidate for selective solvent adsorption under mild conditions. 相似文献