- A cerium-based MOFzyme with multi-enzyme-like activity for the disruption and inhibition of fungal recolonization
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A cerium-based metal-organic framework (Ce-MOF, denoted as AU-1) was synthesized using a solvothermal method by employing 4,4′,4′′-nitrilotribenzoic acid (H3NTB) as the linker and cerium clusters as the metal center. The material was considered as a MOFzy
- Abdelhamid, Hani Nasser,Mahmoud, Ghada Abd-Elmonsef,Sharmouk, Walid
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- Highly Interpenetrated Robust Microporous Hydrogen-Bonded Organic Framework for Gas Separation
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A hydrogen-bonded organic framework (HOF), HOF-11, has been successfully prepared by the slow diffusion of hexane into a tetrahydrofuran solution of tris(4-carboxyphenyl)amine (TCPA). HOF-11 has been characterized by single-crystal and powder X-ray diffra
- Yang, Wei,Wang, Jiawei,Wang, Hailong,Bao, Zongbi,Zhao, John Cong-Gui,Chen, Banglin
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- Multi-Component Metal-Organic Frameworks Significantly Boost Visible-Light-Driven Hydrogen Production Coupled with Selective Organic Oxidation
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Visible-light-driven hydrogen production coupled with selective organic oxidation has attracted increasing attention, as it not only provides clean and renewable energy, but also utilizes the other half reaction to achieve some value-added organic chemicals. Metal-organic frameworks based on metal clusters and organic ligands self-assembly give a perspective on the formation of multifunctional heterogeneous photocatalyst to significantly boost visible-light photocatalytic activities under mild conditions. By incorporating two types of photoactive units, tricarboxytriphenylamine (H3TCA) and tris(4-(pyridinyl)phenyl)amine (NPy3), into a single metal-organic frameworks, a multi-component MOF Co-MIX was obtained. With the redox active metal centers enabling the photoexcitation reduction of protons into hydrogen and the photogenerated holes promoting considerable oxidation of substrates, the resulting Co-MIX exhibits high catalytic activity for the photocatalytic hydrogen production coupled with selective oxidation of benzylamine or 1,2,3,4-tetrahydroisoquinoline. Importantly, the photocatalytic experiments of single-component Co-TCA and Co-NPy3 verified the positive synergistic effects on stability and photocatalytic ability of the two ligands (H3TCA and NPy3) in one single MOF, revealing that the multi-component strategy is very important for the efficient charge separation and excellent photocatalytic activity of the catalyst.
- Duan, Chunying,He, Cheng,Jing, Xu,Li, Hanning,Yang, Yang
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- Novel metal-organic framework with tunable fluorescence property: Supramolecular signaling platform for polynitrophenolics
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With the aid of a rotational C3-symmetric tricarboxytriphenylamine based ligand, a new Cd-MOF was synthesized and characterized by various spectroscopic techniques as well as by single-crystal X-ray diffraction analysis. The structural investig
- Venkateswarulu,Pramanik, Avijit,Koner, Rik Rani
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- A permanently porous single molecule H-bonded organic framework for selective CO2 capture
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Permanent porosity has been realized in a hydrogen bonded framework formed by a single tripodal tricarboxylic acid molecule. The presence of three phenyl rings linked to a flexible sp3 nitrogen centre renders a near-propeller shape to the molec
- Nandi, Shyamapada,Chakraborty, Debanjan,Vaidhyanathan, Ramanathan
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- Multicolored electrochromic and electrofluorochromic materials containing triphenylamine and benzoates
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Six novel electrochromic materials, 4,4′,4′′-nitrilotribenzoates (NTBAs, a-f), with donor-acceptor structure, were designed by combining cathodically electrochromic benzoates as a color-tuning unit and anodically electrochromic triphenylamine as a fluorescence-quenching unit to achieve multi-electrochromism and electrofluorochromism. The stereochemistry of the NTBAs was investigated by single-crystal X-ray diffraction. The NTBAs showed a strong blue emission in N,N-dimethylformamide. When the NTBAs were introduced into electrochromic devices (ECDs), all six ECDs showed multicolored electrochromism. All six ECDs displayed electrofluorochromic behavior, which was possibly caused by the monocationic radical formed from the oxidation of the triphenylamine center. The ester substituents markedly influenced the colored states, switching cyclability, coloration efficiency, and electrofluorochromic properties. The compounds with saturated alkyl substituents (a-c) showed three colored states, namely yellow (at ±2.8 V), light red (at ±3.0 V), and orange red (at ±3.6 V), relatively better cyclability, high coloration efficiency (>220 cm2 C-1), and good electrofluorochromic properties. The compound with the shortest chain length (a) performed best. The compound with an unsaturated alkyl substituent (d) showed poor electrochromic and electrofluorochromic properties. The compounds with aryl substituents (e and f) showed three colored states, namely yellow (at ±2.6 V), purple (at ±3.0 V), and claret (at ±3.6 V), moderate coloration efficiency (ca. 200 cm2 C-1), and good electrofluorochromic properties. The cyclability was markedly improved when the aryl substituents contained an electron-donating group.
- Zhang, Wei-Jing,Lin, Xin-Cen,Li, Feng,Huang, Zhen-Jie,Gong, Cheng-Bin,Tang, Qian
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supporting information
p. 16412 - 16420
(2020/10/14)
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- Cadmium-based metal-organic framework material as well as preparation method and application thereof
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The invention discloses a cadmium-based metal-organic framework material as well as a preparation method and application thereof. Metal ions Cd are used as nodes, 4,4',4''-tricarboxytriphenylamineis used as an organic linking main ligand, 4,4'-azopyri
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Paragraph 0039; 0041
(2019/02/25)
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- An amide-containing metal-organic tetrahedron responding to a spin-trapping reaction in a fluorescent enhancement manner for biological imaging of NO in living cells
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Metal-organic polyhedra represent a unique class of functional molecular containers that display interesting molecular recognition properties and fascinating reactivity reminiscent of the natural enzymes. By incorporating a triphenylamine moiety as a brig
- Wang, Jian,He, Cheng,Wu, Pengyan,Wang, Jing,Duan, Chunying
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supporting information; experimental part
p. 12402 - 12405
(2011/10/09)
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- Substituted Triarylamine Cation-Radical Redox Systems - Synthesis, Electrochemical and Spectroscopic Properties, Hammet Behavior, and Suitability as Redox Catalysts
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21 triarylamines (1n - 1z, 1za, 1zb) and triarylamine analogs (2a, 2b, 3a, 3b, 4a, 4b) with substituents in at least all three p positions and some of their cation-radical hexachloroantimonates have been synthesized.The electrochemical behavior has been studied by cyclic voltammetry.Most of the compounds show chemically and electrochemically reversible first oxidation waves in the formation of the cation radicals.With the exception of 4a and 4b, the second wave for the formation of the dication is chemically irreversible.The UV spectra of the triarylamine cation radicals have been obtained in the presence of a slight excess of SbCl5.A good Hammett correlation between the first anodic potential of only p-substituted triarylamines and the ?/?+ values has been established.Some redox-catalytic properties of triarylamine cation radicals are described. Key Words: Triarylamines / Cation radicals / Electrochemistry / Redox catalysts / Voltammetry, cyclic
- Dapperheld, Steffen,Steckhan, Eberhard,Grosse Brinkhaus, Karl-Heinz,Esch, Thomas
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p. 2557 - 2568
(2007/10/02)
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