Read by QxMD icon Read

Kat8 OR MOF OR Myst1

Yifa Chen, Shenghan Zhang, Sijia Cao, Siqing Li, Fan Chen, Shuai Yuan, Cheng Xu, Junwen Zhou, Xiao Feng, Xiaojie Ma, Bo Wang
A powerful roll-to-roll hot-pressing strategy for mass production of metal-organic framework (MOF)-based filters (MOFilters) using various MOF systems with ranges of substrates is presented. Thus-obtained MOFilters show superior particulate matter removal efficiency under desired working temperatures. Such versatile MOFilters can be scaled up and purposely designed which endow MOFilters with great potentials in both residential and industrial pollution control.
January 19, 2017: Advanced Materials
Sarawoot Impeng, Siwarut Siwaipram, Sareeya Bureekaew, Michael Probst
We first investigate the feasibility of designing a Fe-oxo complex for the activation of alkane C-H bonds by (a) incorporating an Fe ion into a Zn-based cluster derived from a metal-organic framework (MOF) and (b) creating the Fe-oxo complex via decomposition of N2O over a Fe(2+)-substituted Zn-based cluster (Fe-Zn3O(pyrazole)6). From the energy profile, it turns out that both steps should be feasible and that the resulting Fe-oxo complex is stable. In the main step, we then investigate the reactivity of this Fe-oxo cluster for the C-H bond cleavage of ethane by calculating the reaction energy profile and analyzing the electronic structure along the relevant steps...
January 19, 2017: Physical Chemistry Chemical Physics: PCCP
Dan Sun, Yougen Tang, Delai Ye, Jun Yan, Haoshen Zhou, Haiyan Wang
Morphology controllable fabrication of electrode materials is of great significance but is still a major challenge for high performance Li ion batteries. Herein, we propose a novel space constraint assembly approach to tune the morphology of Mn(terephthalic acid) (PTA)-MOF, in which benzonic acid was employed as a modulator to adjust the available MOF assembly directions. As a result, Mn(PTA)-MOFs with microquadrangulars, microflakes, and spindle-like microrods morphologies have been achieved. MnO/C hybrids with preserved morphologies were further obtained by self-sacrificial and thermal transformation of Mn(PTA)-MOFs...
January 19, 2017: ACS Applied Materials & Interfaces
Zhongtao Li, Hongdi Sun, Liangqin Wei, Wen-Jie Jiang, Mingbo Wu, Jin-Song Hu
Developing highly efficient and stable non-Pt electrocatalysts for oxygen reduction reaction (ORR) to replace the state-of-the-art noble metal is essential for the commercialization of fuel cells. Fe-N-C based electrocatalysts are considered as one of promising alternatives to commercial Pt/C. An efficient electrocatalyst commonly requires large density of active site, high surface area, and desirable porosity, especially multi-modal porosity with both large pores for efficient mass transfer and small pores for exposing as much active sites as possible...
January 18, 2017: ACS Applied Materials & Interfaces
Xun Feng, Yuquan Feng, Nan Guo, Yiling Sun, Tian Zhang, Lufang Ma, Liya Wang
A series of five unique d-f heteronuclear luminescent metal-organic frameworks (MOFs) in an entangled polyrotaxane array and the light-harvesting block homonuclear zinc compound have been isolated successfully and characterized. The series of isostructural polymers feature 3,4-connected (4.8(2))(4.8(3).9(2))(6.8.9)2(6.9(2))(8(3)) topology and high stability, exhibiting diverse void spaces. By taking advantage of the isostructural MOFs 2 and 3, the intensities of red and green emissions can be modulated by adjusting the ratios of Eu(III) and Tb(III) ions correspondingly, and white-light emission can be generated by a combination of different doped Tb(III) and Eu(III) concentrations...
January 17, 2017: Inorganic Chemistry
Xu-Jia Hong, Qin Wei, Yuepeng Cai, Sheng-Run Zheng, Ying Yu, Yan-Zhong Fan, Xianyan Xu, Liping Si
A robust primitive diamond-type topology 3-D MOF of {[Cd4(hbhdpy)2(bdc)3(DMA)2]•(H2O)4}n (1, DMA = N,N-dimethylacetamide) was constructed from the planar secondary building units of the dinuclear cadmium clusters, Cd2(µ2-O)2, and two linear organic linkers of the new multidentate Schiff base of 4-(2-hydroxy-3-methoxy-benzyli-denehydrazino-carbonyl)-N-pyridin-4-yl-benzamide (Hhbhdpy) through the solvothermal reaction. 1 presents a 2-fold interpenetrating network along with confined narrow channels and rich acylamide groups as well as potential metal open sites for excellent selective CO2 uptake over CH4/N2 and high luminescent response for 2,4,6-trinitrophenol (TNP) in DMA solution under ambient conditions...
January 17, 2017: ACS Applied Materials & Interfaces
Helge Reinsch, Jannik Benecke, Martin Etter, Niclas Heidenreich, Norbert Stock
The intercalation of different pyrazines (pyrazine, methylpyrazine, 2,5-dimethylpyrazine, 2,3-dimethylpyrazine, trimethylpyrazine and tetramethylpyrazine) into the trans-1,4-cyclohexanedicarboxylate (CDC(2-)) based Al-MOF [Al(OH)(CDC)], denoted as CAU-13, was investigated. The adsorption of the guest molecules into the flexible MOF was carried out from an aqueous solution or via vapour phase adsorption, starting with the hydrated narrow-pore form of the framework [Al(OH)(O2C-C6H10-CO2)]·H2O (CAU-13-np). The obtained host-guest systems were characterised by thermogravimetry and vibrational spectroscopy and their crystal structures were elucidated using powder X-ray diffraction (PXRD) data...
January 17, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Zhi-Gang Gu, Wen-Qiang Fu, Min Liu, Jian Zhang
A self-polymerized chiral monomer 3,4-dihydroxy-l-phenylalanine (l-DOPA) has been introduced into the pores of an achiral surface-mounted metal organic framework (SURMOF), and then the homochiral poly(l-DOPA) thin film has been successfully formed after UV light irradiation and etching of the SURMOF. Remarkably, such a poly(l-DOPA) thin film exhibited enantioselective adsorption of naproxen. This study opened a SURMOF-templated approach for preparing porous polymer thin films.
January 17, 2017: Chemical Communications: Chem Comm
Rosana V Pinto, Fernando Antunes, João Pires, Vanessa Graça, Paula Brandão, Moisés L Pinto
: The synthesis and structural characterization of two isostructural metal (M=Ni, Co) 3D framework structure that integrate vitamin B3 building blocks with NO delivery capabilities and low toxicity is presented. The compounds with a formula [M2(μ2-H2O)(μ-vitamin B3)4]·2H2O contain two crystallographic distinct divalent metal centers connected by a bridging water and carboxylate group from vitamin B3. The porous compounds have the capability of storing and releasing nitric oxide (NO) in a slow and reversible manner, with released amounts of 2...
January 13, 2017: Acta Biomaterialia
Birgit Claes, Tom Boudewijns, Laurens Muchez, Geert Hooyberghs, Erik V Van der Eycken, Jozef Vanderleyden, Hans P Steenackers, Dirk E De Vos
Metal-organic frameworks (MOFs) have a large potential for delivery of active molecules. Here, a MOF coating is investigated as a smart host matrix for triggered release of anti-biofilm compounds. Besides a coating consisting of the regular Fe-terephthalate MIL-88B(Fe), a new hydrophobic MIL-88B(Fe) coating is synthesized in hydrothermal conditions using palmitic acid as a lattice terminating group. These porous materials are used as a host matrix for the anti-biofilm compound 5-(4-chlorophenyl)-N-(2-isobutyl)-2-aminoimidazole, which has a specific biofilm inhibiting effect at concentrations at which no activity against planktonic cells is detected...
January 12, 2017: ACS Applied Materials & Interfaces
Mohua Li, Zhenjian Zheng, Yangqiong Zheng, Cao Cui, Chunxia Li, Zhengquan Li
Development of MOF-based photocatalysts is intriguing research due to their structural flexibility and tremendous catalytic sites, whereas most MOFs only can take use of UV/visible light and lack of response to NIR light. Herein, we present a facile approach to integrate upconversion nanoparticles (UCNPs) with MOF to build a NIR-responsive composite photocatalyst. The MOF shell with controllable thickness can be grown on the UCNPs, thus exhibiting tunable photocatalytic activities under NIR irradiation. Furthermore, we extend visible absorption of the MOF shell by adding -NH2 groups so that the composite photocatalysts have a better utilization of UC emissions and sunlight to improve their activities...
January 12, 2017: ACS Applied Materials & Interfaces
Xuechuan Gao, Manjue Zhai, Weihua Guan, Jingjuan Liu, Zhiliang Liu, Alatangaole Damirin
As a result of their extraordinarily large surfaces and well-defined pores, the design of multifunctional metal-organic framework (MOF) is crucial for drug delivery while has been rarely reported. In this paper, a novel drug delivery system (DDS) based on nanoscale metal-organic framework (MOF) was developed for using in cancer diagnosis and therapy. This MOF based tumour targeting DDS was fabricated by a simple post-synthetic surface modification process. Firstly, magnetic mesoporous nanomaterial Fe-MIL-53-NH2 was devoted for encapsulating the drug and served as a magnetic resonance (MR) contrast agent...
January 12, 2017: ACS Applied Materials & Interfaces
Jitang Chen, Yang Yang, Jianwei Su, Peng Jiang, Guoliang Xia, Qianwang Chen
The hydrogen evolution reaction (HER) is highly relied on Pt-based electrocatalysts with high activity and stability. For a long time, a host of efforts have been made in the development of novel platinum nano-structures with a low amount of Pt because the scarcity and high price of Pt hinders its practical applications. Here, we report the preparation of PtCoFe@C electrocatalysts with remarkably reduced Pt loading amount of 4.60%by annealing Pt-doped metal-organic frameworks (MOFs). The electrocatalyst demonstrated an outstanding performance with only 45 mV overpotential to achieve the 10 mA cm-2 current density, which is quite close to that of the commercial 20% Pt/C catalyst...
January 12, 2017: ACS Applied Materials & Interfaces
Ruth Röder, Tobias Preiß, Patrick Hirschle, Benjamin Steinborn, Andreas Zimpel, Miriam Hoehn, Joachim O Rädler, Thomas Bein, Ernst Wagner, Stefan Wuttke, Ulrich Lächelt
Self-assembly of individual units into multicomponent complexes is a powerful approach for the generation of functional super-structures. We present the coordinative interaction of oligohistidine-tags (His-tags) with metal-organic framework nanoparticles (MOF NPs). By this novel concept, different molecular units can be anchored on the outer surface of MOF NPs in a self-assembly process generating multifunctional nanosystems. The article focuses on two main objectives: first, the detailed investigation of the assembly process and fundamental establishment of the novel functionalization concept; and second, its subsequent use for the development of biomacromolecule (e...
January 11, 2017: Journal of the American Chemical Society
Claudia Schenk, Christel Kutzscher, Franziska Drache, Stella Helten, Irena Senkovska, Stefan Kaskel
Preparation of thin-layer chromatographic (TLC) plates based on metal-organic frameworks (MOFs) as porous stationary phases is described. DUT-67 (DUT = Dresden University of Technology), a zirconium based MOF, was used in combination with a fluorescent indicator as stationary phase for analyzing a small selection of a wide spectrum of relevant analytes. The successful separation of benzaldehyde from trans-cinnamaldehyde and 4-aminophenol from 2-aminotoluene is reported as a model system using optimized eluent mixtures containing acetic acid...
January 11, 2017: ACS Applied Materials & Interfaces
Anjali Jayakumar, Rajini P Antony, Ronghua Wang, Jong-Min Lee
Highly optimized nickel cobalt mixed oxide has been derived from zeolite imidazole frameworks. While the pure cobalt oxide gives only 178.7 F g(-1) as the specific capacitance at a current density of 1 A g(-1) , the optimized Ni:Co 1:1 has given an extremely high and unprecedented specific capacitance of 1931 F g(-1) at a current density of 1 A g(-1) , with a capacitance retention of 69.5% after 5000 cycles in a three electrode test. This optimized Ni:Co 1:1 mixed oxide is further used to make a composite of nickel cobalt mixed oxide/graphene 3D hydrogel for enhancing the electrochemical performance by virtue of a continuous and porous graphene conductive network...
January 11, 2017: Small
Ang Li, Yan Tong, Bin Cao, Huaihe Song, Zhihong Li, Xiaohong Chen, Jisheng Zhou, Gen Chen, Hongmei Luo
Porous carbon is one of the most promising alternatives to traditional graphite materials in lithium-ion batteries. This is not only attributed to its advantages of good safety, stability and electrical conductivity, which are held by all the carbon-based electrodes, but also especially ascribed to its relatively high capacity and excellent cycle stability. Here we report the design and synthesis of a highly porous pure carbon material with multifractal structures. This material is prepared by the vacuum carbonization of a zinc-based metal-organic framework, which demonstrates an ultrahigh lithium storage capacity of 2458 mAh g(-1) and a favorable high-rate performance...
January 11, 2017: Scientific Reports
Aleksandr A Sapianik, Ekaterina N Zorina-Tikhonova, Mikhail A Kiskin, Denis G Samsonenko, Konstantin A Kovalenko, Alexey A Sidorov, Igor L Eremenko, Danil N Dybtsev, Alexander J Blake, Stephen P Argent, Martin Schröder, Vladimir P Fedin
The tetranuclear heterometallic complex [Li2Zn2(piv)6(py)2] (1, where piv(-) = pivalate and py = pyridine) has been successfully employed as a presynthesized node for the construction of four porous metal-organic frameworks (MOFs) [Li2Zn2(R-bdc)3(bpy)]·solv (2-R, R-bdc(2-); R = H, Br, NH2, NO2) by reaction with 4,4'-bipyridine (bpy) and terephthalate anionic linkers. The [Li2Zn2] node is retained in the products, representing a rare example of the rational step-by-step design of isoreticular MOFs based on complex heterometallic building units...
January 10, 2017: Inorganic Chemistry
Ya-Pan Wu, Guo-Wang Xu, Wen-Wen Dong, Jun Zhao, Dong-Sheng Li, Jian Zhang, Xianhui Bu
New porous anionic Ln-MOFs, namely, [Me2NH2][Ln(CPA)2(H2O)2] (Ln = Eu, Gd), have been prepared through the self-assembly of 5-(4-carboxy phenyl)picolinic acid (H2CPA) and lanthanide ions. They feature open anionic frameworks with 1-D hydrophilic channels and exchangeable dimethylamine ions. The Eu phase could detect Fe(3+) ions with high selectivity and sensitivity in either aqueous solution or biological condition. The ratios of lanthanide ions on this structure platform could be rationally tuned to not only achieve dichromatic emission colors with linear correlation but also attain three primary colors (RGB) and even white light with favorable correlated color temperature...
January 10, 2017: Inorganic Chemistry
Zhi-Wei Zhao, Tao Wen, Kuang Liang, Yi-Fan Jiang, Xiao Zhou, Cong-Cong Shen, An-Wu Xu
As the ever-growing demand for high-performance power sources, lithium-ion batteries with high storage capacities and outstanding rate performance have been widely considered as a promising storage device. In this work, starting with metal-organic frameworks (MOFs), we have developed a facile approach to the synthesis of hybrid Fe3O4/VOx hollow microboxes via the process of hydrolysis and ion exchange and subsequent calcination. In the constructed architecture, the hollow structure provides efficient lithium ions diffusion pathway and extra space to accommodate the volume expansion during the insertion and extration of Li+...
January 10, 2017: ACS Applied Materials & Interfaces
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"