A5020961165- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Conducting polymers and applications
- Organic Light-Emitting Diodes Research
- Luminescence and Fluorescent Materials
- Electrochemical Analysis and Applications
- Textile materials and evaluations
- Organic Electronics and Photovoltaics
- Crystallography and molecular interactions
- Photochemistry and Electron Transfer Studies
- Mesoporous Materials and Catalysis
- Nuclear Physics and Applications
- Fullerene Chemistry and Applications
- Porphyrin and Phthalocyanine Chemistry
- Graphene research and applications
- Supramolecular Chemistry and Complexes
- Photochromic and Fluorescence Chemistry
- Aerogels and thermal insulation
- Molecular Junctions and Nanostructures
- Supramolecular Self-Assembly in Materials
- Electrochemical sensors and biosensors
- Catalysis and Oxidation Reactions
- Nonlinear Optical Materials Studies
- Electrocatalysts for Energy Conversion
- Nuclear reactor physics and engineering
Huazhong University of Science and Technology
2024-2025
Tsinghua University
2004-2024
Institute of Coal Chemistry
2023-2024
Yueyang Hospital
2024
Shanghai University of Traditional Chinese Medicine
2024
Southwest Petroleum University
2024
University of Jinan
2007-2023
Shantou University
2019-2023
Imperial College London
2022
Dalian Institute of Chemical Physics
2022
In the quest for strong lightweight materials, silica aerogels would be very attractive, if they were not fragile. The strength of aerogel monoliths has been improved by a factor over 100 through cross-linking nanoparticle building blocks preformed hydrogels with poly(hexamethylene diisocyanate). Composite are much less hygroscopic than native silica, and do collapse when in contact liquids.
The mesoporous surfaces of TMOS-derived silica aerogels have been modified with amines by copolymerization TMOS APTES. amine sites become anchors for cross-linking the nanoparticles skeletal backbone aerogel attachment di-, tri-, and tetra-functional epoxies. resulting conformal coatings increase density native a factor 2−3 but strength materials may more than 2 orders magnitude. Processing variables such as amount APTES used to make gels, epoxy type concentration cross-linking, temperature...
ConspectusCarbon materials have a long history of use as electrodes in electrochemistry, from (bio)electroanalysis to applications energy technologies, such batteries and fuel cells. With the advent new forms nanocarbon, particularly, carbon nanotubes graphene, electrode taken on even greater significance for electrochemical studies, both their own right components supports an array functional composites.With increasing prominence nanomaterials electrochemistry comes need critically evaluate...
A detrimental competition between the urea oxidation reaction (UOR) and oxygen evolution is identified. Strategies are proposed to alleviate such boost performance of UOR other organic compound reactions.
A new method for transferring chemical vapor deposition (CVD)-grown monolayer graphene to a variety of substrates is described. The makes use an organic/aqueous biphasic configuration, avoiding the any polymeric materials that can cause severe contamination problems. graphene-coated copper foil sample (on which was grown) sits at interface between hexane and aqueous etching solution ammonium persulfate remove copper. With aid Si/SiO2 substrate, layer then transferred second hexane/water...
A major challenge in electrocatalysis is to understand the effect of electrochemical processes on physicochemical properties nanoparticle or nanocluster (NC) ensembles, especially for complex processes, such as oxygen reduction reaction (ORR) considered herein. We describe an approach whereby at a small number well-defined mass-selected Pt NCs (Pt923±37, diameter, d ≈ 3 nm), deposited from cluster beam source carbon-coated transmission electron microscopy (TEM) grids, can be measured by...
Electron transfer kinetics for outer-sphere redox couples is fast on the basal surface of highly oriented pyrolytic graphite (HOPG).
A fully conjugated figure-of-eight nanohoop is presented with facile synthesis. The molecule's lemniscular skeleton features the combination of two strained oligoparaphenylene loops and a flexible cyclooctatetrathiophene core. Its rigid yet guest-adaptive cavities enable formation peanut-like 1:2 host-guest complexes C60 or C70 , which have been confirmed by X-ray crystallography characterized in solution. Further computational studies suggest notable geometric variations non-covalent...
A polycatenated HOF has been constructed from supramolecular embraced pairs of macrocyclic modules, featuring fluorescent detection nitrobenzene in water.
Organic donor–acceptor cocrystals can improve the light-harvesting ability in visible or near-infrared regions, having a good photothermal conversion efficiency some cases. While mechanism of organic is still ambiguous. Here, fluorescent molecule pyrene with wide energy gap selected as donor, and conjugated tetracyanide molecules are chosen acceptors. Pyrene readily self-assembled into (pyrene-tetracyanobenzene (PBC), pyrene-tetracyanoethylene (PEC), pyrene-tetracyanoquinodimethane (PQC))...
The mechanism and kinetics of the electrochemical nucleation growth palladium (Pd) nanoparticles (NPs) on carbon electrodes have been investigated using a microscale meniscus cell both highly oriented pyrolytic graphite (HOPG) carbon-coated transmission electron microscopy (TEM) grid. Using cell, it is possible to monitor initial stage electrodeposition electrochemically, while ability measure directly TEM grid allows subsequent high-resolution characterization which provides detailed...
Exohedral cuprofullerenes with 6-, 12-, or 24-nuclearity were obtained by utilizing fluorocarboxylic/dicarboxylic acid under solvothermal conditions. The 24-nuclear molecule presents a C60@Cu24 core–shell structure rhombicuboctahedron Cu24 coated on the C60 core, representing highest nuclearity in metallofullerene. resultant complexes show an efficient absorption of visible light as opposed to pristine C60. TD-DFT calculations revealed charge transfer from Cu(I) and O atoms fullerene moiety...
Abstract The highly strained, phenylene‐derived organic cages are typically regarded as very rigid entities, yet their deformation potential and supramolecular properties remain underexplored. Herein, we report a pliable conjugated phenylene nanocage by synergistically merging flexible building blocks. anisotropic cage molecule contains branched chains capped calix[6]arene moiety, the delicate conformational changes of which endow with remarkably deformable cavity. When complexing fullerene...
In this study, we developed an indirect method for the synthesis of 2-deoxyglycosides with exclusive β-configuration using glucosyl and galactosyl bromide donors 2-thioacetyl (SAc) groups. The 2-SAc were easily obtained through treatment 1-OAc, glucose galactose HBr-CH3COOH solution, respectively. glycosylation such acceptors under improved Koenigs–Knorr condition resulted in products excellent yields. synthetic approach glycosyl glycals as starting materials was also investigated. Based on...
Tandem organic light emitting diodes (OLEDs) are ideal for lighting applications due to their low working current density at high brightness. In this work, we have studied an efficient electron transporting layer of KBH(4) doped 9,10-bis(3-(pyridin-3-yl)phenyl)anthracene (DPyPA) which is located adjacent charge generation MoO(3)/NPB. The excellent property the DPyPA:KBH(4) helps tandem OLED achieve a lower voltage than device with widely used tris-(8-hydroxyquinoline)aluminum:Li. For white...
The electrochemistry of the Fe3+/2+ redox couple has been studied on highly oriented pyrolytic graphite (HOPG) samples that differ in step edge density by 2 orders magnitude, to elucidate effect surface structure electron transfer (ET) kinetics. Macroscopic cyclic voltammetry measurements a droplet-cell arrangement, highlight process is characterised slow ET kinetics HOPG and coverage little Fe3+/2+. A standard heterogeneous rate constant ∼5 × 10-5 cm s-1 for freshly cleaved was derived from...
Noble metal clusters (Ag, Au) were formed in a silica aerogel matrix by γ-irradiation of hydrogel precursors loaded with aqueous solutions containing Ag+ or [AuCl4]- ions. Hydrogels exposed to γ-rays assumed the color expected for colloidal suspensions Ag (respectively clusters. The hydrogels subsequently washed and supercritically dried, without any evident change color, indicating that not removed during drying. Typical γ-ray doses between 2 3.5 kGy, achieved complete reduction ion...
Two coordination disk-type nano-Saturn complexes were assembled. The highest number of 30 C–H⋯π interactions induces the formation nano-Saturns. Different photoinduced charge/energy transfer mechanisms quench luminescence disk.