A5038097681- Covalent Organic Framework Applications
- Metal-Organic Frameworks: Synthesis and Applications
- Luminescence and Fluorescent Materials
- Advanced Photocatalysis Techniques
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Supramolecular Chemistry and Complexes
- Radioactive element chemistry and processing
- Perovskite Materials and Applications
- Surface Chemistry and Catalysis
- Chemical Synthesis and Reactions
- Nanocluster Synthesis and Applications
- Luminescence Properties of Advanced Materials
- Nanomaterials for catalytic reactions
- Gold and Silver Nanoparticles Synthesis and Applications
- Graphene research and applications
- Catalytic Cross-Coupling Reactions
- Radiation Detection and Scintillator Technologies
- Chemical Synthesis and Characterization
- Membrane Separation and Gas Transport
- Advanced NMR Techniques and Applications
- Caching and Content Delivery
Lanzhou University
2016-2025
State Key Laboratory of Applied Organic Chemistry
2023-2024
Lanzhou City University
2015-2020
Lanzhou Institute of Chemical Physics
2017-2019
Chinese Academy of Sciences
2019
Academia Sinica
2017
Covalent organic frameworks (COFs) are crystalline porous solids with well-defined two- or three-dimensional molecular structures. Although the structural regularity provides this new type of material high potentials in catalysis, no example has been presented so far. Herein, we report first application a COF material, COF-LZU1, for highly efficient catalysis. The easily prepared imine-linked COF-LZU1 possesses two-dimensional eclipsed layered-sheet structure, making its incorporation metal...
Heavy metal ions are highly toxic and widely spread as environmental pollutants. New strategies being developed to simultaneously detect remove these ions. Herein, we take the intrinsic advantage of covalent organic frameworks (COFs) develop fluorescent COFs for sensing applications. As a proof-of-concept, thioether-functionalized COF material, COF-LZU8, was "bottom-up" integrated with multifunctionality selective detection facile removal mercury(II): π-conjugated framework signal...
The structural uniqueness of covalent organic frameworks (COFs) has brought these new materials great potential for advanced applications. One the key aspects yet to be developed is how improve robustness covalently linked reticular frameworks. In order make best use π-conjugated structures, we develop herein a "killing two birds with one stone" strategy and construct series ultrastable benzoxazole-based COFs (denoted as LZU-190, LZU-191, LZU-192) metal-free photocatalysts. Benefiting from...
Surface covalent organic frameworks (SCOFs), featured by atomic thick sheet with covalently bonded building units, are promised to possess unique properties associated reduced dimensionality, well-defined in-plane structure, and tunable functionality. Although a great deal of effort has been made obtain SCOFs different linkages blocks via both "top-down" exfoliation "bottom-up" surface synthesis approaches, the obtained generally suffer low crystallinity, which impedes understanding...
Covalent organic frameworks (COFs) represent a new type of crystalline porous materials that are covalently assembled from building blocks. Construction functional COFs is, however, difficult task because it has to meet simultaneously the requirements for crystallinity and functionality. We report herein facile strategy direct construction chiral-functionalized chiral The key design is use rigid scaffold 4,4′-(1H-benzo[d]imidazole-4,7-diyl)dianiline (2) attaching variety moieties. As first...
The Salen unit represents one of the most important ligands in coordination chemistry. We report herein first example a Salen-based covalent organic framework (COF), which both construction COF structure and functionalization with moieties have been realized single step. Due to its structural uniqueness, obtained material, Salen-COF, possesses high crystallinity excellent stability. Based on this, series metallo-Salen-based COFs were prepared via metalation for further applications.
A guest-induced reversible crystal-structure transformation is identified in a new 3D covalent organic framework (COF) by comprehensive analyses using powder X-ray diffraction, vapor sorption isotherm, and 129Xe NMR spectroscopy. The revolving imine bond interpenetrating networks uncovered as the key to dynamic behavior, potential applications of which are illustrated gas separation heterogeneous catalysis, thus paving way design stimuli-responsive multifunctional COF materials.
Methodology development of robust linkages is fundamentally important for the synthesis and application covalent organic frameworks (COFs). We report herein a new strategy based on multicomponent reactions (MCRs) to construct ultrastable COFs. With one-pot formation five bonds in each cyclic joint, series imidazole-linked COFs were robustly constructed through Debus-Radziszewski MCR from three easily available components. By reaching higher level complexity precision assembly, this research...
Developing efficient adsorbents for the removal of water pollutants is great significance environmental protection. In this study, conjugated triaryl triazines (CTT), containing intramolecular hydrogen-bonding patterns, were recognized to be intriguing building blocks construction porous organic polymer (POP) adsorbents. These planar monomers with multiple phenolic hydroxyl groups facilitated formation aza-linked polymers hierarchical structures, sheet-like morphology, good surface...
The imine-exchange strategy makes single-crystal growth of covalent organic frameworks (COFs) with large size (>15 microns) possible but is a time-consuming process (15 to 80 days) that has had limited success (six examples) and restricts structural characterization synchrotron-radiation sources for x-ray diffraction studies. We developed CF
The development of linkage chemistry in the research area covalent organic frameworks (COFs) is fundamentally important for creating robust structures with high crystallinity and diversified functionality. We reach herein a new level complexity controllability by achieving first synthesis fused-ring-linked COFs. A series bicyclic pyrano[4,3-b]pyridine COFs have been constructed via cascade protocol involving Schiff-base condensation, intramolecular [4 + 2] cycloaddition,...
The construction of function-oriented covalent organic frameworks (COFs) remains a challenge as it requires simultaneous consideration diversified structures, robust linkage, and tailorable functionalities. Herein, we report the rational synthesis functionalized COFs via four-component reaction strategy. Through Debus–Radziszewski reaction, 11 N-substituted imidazole-based with structures were facilely constructed from readily available building blocks. By forming imidazole these synthesized...
Two new 2D covalent organic frameworks were synthesized based on a triazatruxene unit, which could be used as potential fluorescent sensors for electron rich/deficient arene vapors.
Featuring the simultaneous generation of a library compounds from certain intermediate, divergent synthesis has found increasing applications in construction natural products and potential medicines. Inspired by this approach, presented herein is general strategy to introduce functionality, manner, into covalent organic frameworks (COFs). This modular protocol includes two stages assembly, through which functional COFs can be constructed three-step transformation key platform molecule, such...
Highly crystalline covalent organic frameworks were synthesized from flexible 2,4,6-triaryloxy-1,3,5-triazine building blocks on a gram scale, and the cooperative weak interactions play key role in formation of porous frameworks.
Development of new chemistry to simultaneously meet the demands for topology, connectivity, and functionality is highly desired in research area covalent organic frameworks (COFs). We explore herein isocyanide so as establish a facile paradigm integrate ultrastability COFs. Using representative Groebke–Blackburn–Bienaymé (GBB) reaction based on chemistry, we are able construct series pyrimidazole-based COFs one step from isocyanide, aminopyridine, aldehyde monomers. Diversified...
Metal-free perovskites (MFPs) possess excellent photophysical properties of while avoiding the introduction toxic metal ions and organic solvents, have been expanded to X-ray detection. However, iodine-based high-performance MFPs are tended oxidation, corrosion, uncontrolled ion migration, resulting in poor material stability device performance. Herein, strongly electronegative PF6- pseudohalide is used fabricate large-size MDABCO-NH4 (PF6 )3 (MDBACO = methyl-N'-diazabicyclo[2.2.2]octonium)...
Solid-state emissive cyanostilbene-based conjugated porous polymers with different topological structure and photophysical properties were newly synthesized <italic>via</italic> cost-effective Knoevenagel polycondensation.
Rapid progress has been witnessed in the past decade fields of covalent organic frameworks (COFs) and dynamic nuclear polarization (DNP). In this contribution, we bridge these two by constructing radical-embedded COFs as promising DNP agents. Via transfer from unpaired electrons to nuclei, realizes significant enhancement NMR signal intensities. One crucial issues is screen for suitable radicals act efficient polarizing agents, basic criteria which are homogeneous distribution fixed...
We demonstrate a facile approach for the synthesis of –CN– linked covalent organic frameworks under ambient conditions.
We demonstrate herein a facile approach for constructing –CN– linked COFs from acetals.
“Bottom-up” embedding of thiophene derivatives into CMPs for highly efficient heterogeneous photocatalysis is reported.