- Highly selective sorption of small hydrocarbons and photocatalytic properties of three metal-organic frameworks based on tris(4-(1H-imidazol-1-yl) phenyl)amine ligand
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By employing a tris(4-(1H-imidazol-1-yl)phenyl)amine (Tipa) ligand, three new metal-organic frameworks, [Zn2(Tipa)(4,4′-bpdc) 1.5(H2O)(NO3)]·2(DMF)·H 2O (1; 4,4′-bpdc = 4,4′-biphenyldicarboxylate, DMF = N,N-dimenthylformamide), [Cd(Tipa)Cl2]·2(DMF)·H 2O (2), and [Co(Tipa)Cl2(H2O)] ·DMF·H2O (3), have been synthesized solvothermally. Compound 1 features a three-dimensional (3D) pillared-layer structure with low band gap and interesting photocatalytic properties. Compound 2 is a 2-fold interpenetrating (3,6)-connected porous framework, and it shows highly selective adsorption of C2H2, CO2, and C 2H4 over CH4. Compound 3 with honeycomb-like layers exhibits unusual 2D + 2D- 3D polycatenation (2D = two-dimensional). The luminescent properties for these compounds were also investigated.
- Fu, Hong-Ru,Kang, Yao,Zhang, Jian
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- Hybridization of MOFs and ionic POFs: a new strategy for the construction of bifunctional catalysts for CO2cycloaddition
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A new strategy toward constructing a bifunctional catalyst for CO2cycloaddition has been developed based on post-synthetic modification of CUS-based metal-organic frameworks (MOFs) with ionic porous organic frameworks (POFs) to form MOF@iPOF core-shell hybrid materials. Based on this strategy, two new MOF@iPOF core-shell hybrid materials, Cu3(BTC)2@iPOF-TB-Br?and Cu3(BTC)2@iPOF-TM-Br?, are synthesized for the first time by feasible encapsulation of a Cu3(BTC)2core within an ionic POF shell. Because of the synergetic role of dual functional sites including CUS as a Lewis acid in the MOFs and the Br?anion as the nucleophile in the ionic POFs, Cu3(BTC)2@iPOF-TB-Br?and Cu3(BTC)2@iPOF-TM-Br?demonstrate excellent catalytic performance for the CO2cycloaddition under co-catalyst free mild conditions (60 °C, 0.5 MPa CO2, 24 h). Moreover, these core-shell bifunctional catalysts can not only realize the synergy of two functional sites, but also maintain the porosity of hybrid materials for improving the mass transfer rate and catalytic efficiency.
- Liu, Kang,Jiao, Shaoshao,Zhao, Huihui,Cao, Fan,Ma, Dingxuan
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- A new tridentate fluorescent-colorimetric chemosensor for copper(II) ion
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A new tri-imidazolium salt, tris(4-(3-(2-((8-hydroxy-9,10-dioxo-9′,10′-dihydroanthracen-1-yl)oxy)ethyl)-1H-imidazole-3′-ium-1′-yl)phenyl)amine hexafluorophosphate was prepared and characterized. Particularly, the recognition performance of the tri-imidazo
- Zhao, Zhi-Xiang,Hu, Ze-Liang,Zhang, Xian-Tao,Liu, Qing-Xiang
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- Two unprecedented 3D metal-organic polyrotaxane frameworks based on a new flexible tri(imidazole) ligand
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Two Cd(ii)-containing coordination polymers based on a new tri(4-imidazolylphenyl)amine (Tipa) ligand and carboxylates, namely, [Cd(Tipa)(L1)]·2H2O (1) and [Cd3(Tipa) 2(L2)2Cl2]·4H2O (2), where H2L1 = 5-OH-1,3-benzenedicarboxylic acid and H2L2 = 1,4-benzendicarboxylic acid, have been synthesized by varying the carboxylates under hydrothermal conditions. In 1, adjacent Cd(ii) centers are linked by L1 anions to generate Cd-carboxylate chains, which are further extended by Tipa ligands to form a puckered double sheet. The most peculiar feature of 1 is the entangled fashion between the [Cd2(Tipa)2] loop and the L1 ligand rod. Every [Cd2(Tipa)2] loop of each layer is threaded by one L1 ligand rod of an adjacent layer. In this entangled mode, the 2D → 3D polyrotaxane framework was obtained, which represents an unusual 2D → 3D metal-organic polyrotaxane framework entangled in a highly rare parallel fashion. In 2, two identical 3D self-penetrating frameworks interpenetrate each other in a 2-fold mode. If we regard each Cd 2(Tipa)2 window as a loop and each L2 ligand as a single rod, undoubtedly, the structure of 2 also can be described as a 3D metal-organic polyrotaxane framework. As far as we know, compound 2 is the first example of a 2-fold interpenetrating 3D framework with polyrotaxane features. The luminescent properties for the two compounds were also investigated.
- Wu, Hua,Liu, Hai-Yan,Liu, Bo,Yang, Jin,Liu, Ying-Ying,Ma, Jian-Fang,Liu, Yun-Yu,Bai, Hong-Ye
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- A 3D luminescent metal-organic framework constructed from Cu 4I4 cubane clusters and triangular imidazole ligand
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The solvothermal reaction between cuprous iodide and the rigid triangular imidazole ligand in mixed N,N'-dimethylacetamide (DMA)-acetonitrile solvent leads to the isolation of the 3D metal-organic framework [(Cu4I 4)3(TIPA)4]·7DMA (1) [TIPA = tri(4-imidazolylphenyl) amine], which was characterized by elemental analysis, IR spectroscopy, powder X-ray diffraction, and single-crystal X-ray diffraction. Topologically, the structure of 1 is an unprecedented 3,3,4,4-connected net with a point symbol of {4.8.10}2{4.82}2{4 2.82.102}2{84.12 2}. Compound 1 exhibits orange-red photoluminescence with an emission maximum at 622 nm at room temperature. Copyright
- Liu, Shan-Shan,Yuan, Shuai,Hu, Tuo-Ping,Sun, Di
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- High-Fidelity, Narcissistic Self-Sorting in the Synthesis of Organometallic Assemblies from Poly-NHC Ligands
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Highly selective, narcissistic self-sorting has been observed in the one-pot synthesis of three organometallic molecular cylinders of type [M3{L-(NHC)3}2](PF6)3 (M=Ag+, Au+; L=1,3,5-benzene, triphenylamine, or 1,3,5-triphenylbenzene) from L-(NHC)3 and silver(I) or gold(I) ions. The molecular cylinders contain only one type of tris-NHC ligand with no crossover products detectable. Transmetalation of the tris-NHC ligands from Ag+ to Au+ in a one-pot reaction with retention of the supramolecular structures is also demonstrated. High-fidelity self-sorting was also observed in the one-pot reaction of benzene-bridged tris-NHC and tetrakis-NHC ligands with Ag2O. This study for the first time extends narcissistic self-sorting in metal–ligand interactions from Werner-type complexes to organometallic derivatives.
- Sinha, Narayan,Tan, Tristan T. Y.,Peris, Eduardo,Hahn, F. Ekkehardt
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- An unprecedented 2D → 3D metal-organic polyrotaxane framework constructed from cadmium and a flexible star-like ligand
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An unprecedented 2D → 3D metal-organic polyrotaxane framework, based on a new star-like tri(4-imidazolylphenyl)amine ligand, has been synthesized and characterized, which represents the first example of 2D → 3D polyrotaxane entangled in a parallel fashion.
- Wu, Hua,Liu, Hai-Yan,Liu, Ying-Ying,Yang, Jin,Liu, Bo,Ma, Jian-Fang
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- A Water-Stable Cationic Metal–Organic Framework as a Dual Adsorbent of Oxoanion Pollutants
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A three-dimensional water-stable cationic metal–organic framework (MOF) pillared by a neutral ligand and with NiIImetal nodes has been synthesized employing a rational design approach. Owing to the ordered arrangement of the uncoordinated tetrahedral sulfate (SO42?) ions in the channels, the compound has been employed for aqueous-phase ion-exchange applications. The compound exhibits rapid and colorimetric aqueous-phase capture of environmentally toxic oxoanions (with similar geometries) in a selective manner. This system is the first example of a MOF-based system which absorbs both dichromate (Cr2O72?) and permanganate (MnO4?) ions, with the latter acting as a model for the radioactive contaminant pertechnetate (TcO4?).
- Desai, Aamod V.,Manna, Biplab,Karmakar, Avishek,Sahu, Amit,Ghosh, Sujit K.
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- Chiral and porous coordination polymers based on an N-centered triangular rigid ligand
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Four cadmium and cobalt coordination polymers with unique structures and topologies have been successfully synthesized under solvothermal conditions by employing an elongated triangular rigid N-containing ligand tris(4-(1H-imidazol- 1-yl)phenyl)amine (TIPA) and 5-hydroxyisophthalic acid (5-OH-H2bdc) as anion coligand. Compounds 1-4 were characterized by single crystal X-ray structure analyses, thermogravimetric analyses, SHG, and photoluminescent measurements. Compound 1 crystallizes in the chiral space group C2 (No. 5) and features a 2D → 3D parallel/parallel inclined polycatenated framework. Compound 2 crystallizes in trigonal symmetry with a high-symmetry space group R3 and features a 2D porous noninterpenetrating coordination network. Compound 3 crystallizes in the monoclinic space group P21/n and shows a 2D → 3D parallel/parallel polycatenation framework, and compound 4 crystallizes in the orthorhombic chiral space group P212 121 (No. 19) and shows a very rarely 3D + 3D heterogeneous 2-fold interpenetration framework built from (3,5)-connected (4 2·65·83)(42·6) AFUQOH nets and (3,5)-connected (63)(69·8) gra nets.
- Yao, Xiao-Qiang,Cao, Da-Peng,Hu, Jin-Song,Li, Yi-Zhi,Guo, Zi-Jian,Zheng, He-Gen
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- Tris-NHC-propagated self-supported polymer-based Pd catalysts for heterogeneous C-H functionalization
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Three-dimensionally propagated imidazolium-containing mesoporous coordination polymer and organic polymer-based platforms were successfully exploited to develop single-site heterogenized Pd-NHC catalysts for oxidative arene/heteroarene C-H functionalization reactions. The catalysts were efficient in directed arene halogenation, and nondirected arene and heteroarene arylation reactions. High catalytic activity, excellent heterogeneity and recyclability were offered by these systems making them promising candidates in the area of heterogeneous C-H functionalization, where efficient catalysts are still scarce.
- Choudhury, Joyanta,Dutta, Tapas Kumar,Mandal, Tanmoy,Mohanty, Sunit
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supporting information
p. 10182 - 10185
(2021/10/12)
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- Imidazole derivative polyaromatic cartankylate iron complex as well as preparation method and application thereof
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The invention discloses an imidazole derivative polyaromatic cartankylate iron complex, the chemical name of which is monohydrate 1, 2-tri (4-imidazolylphenyl) amino-4, 4 ', 4' '-(1, 3, 5-triazine-2,4, 6-triyl) iron tribenzoate. A preparation method comprises the following steps: in a mixed solvent of water and an organic solvent, carrying out a hydrothermal reaction on tris (4-imidazolyl phenyl)amine, 4, 4 ', 4' '-(1, 3, 5-triazine-2, 4, 6-triyl) tris (trimellitic acid) and a Fe (II) source, cooling and crystallizing to obtain the Fe (II)-tris (4-imidazolyl phenyl) amine. The complex can beused as a positive electrode material of a supercapacitor and has an application prospect in the field of electrochemical energy storage. The material and a carbon-containing iron oxide/iron nitridemixture obtained by calcining the material at high temperature can be respectively used as a positive electrode material and a negative electrode material of a supercapacitor, and the assembled asymmetric supercapacitor has the characteristics of high capacitance, capability of being recycled for multiple times and relatively low resistance.
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Paragraph 0067-0070; 0091-0094; 0111-0114
(2020/12/08)
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- Azacyclo-thioketone compound as well as preparation method and application thereof
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The invention discloses an azacyclo-thioketone compound as well as a preparation method and application thereof. The preparation method comprises the following steps: reacting triphenylamine and liquid bromine in an organic solvent, and reacting the obtai
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Paragraph 0010; 0020
(2018/08/03)
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