Publications

Ultrafine PtO₂ nanoparticles coupled with a Co(OH)F nanowire array for enhanced hydrogen evolution

In this communication, we report the in situ formation of ultrafine PtO₂ nanoparticles coupled with a Co(OH)F nanowire array (PtO₂-Co(OH)F NA/TM) via a facile hydrothermal treatment. The PtO₂-Co(OH)F NA/TM possesses interfacial synergy derived from its favorable composition and structure. It can greatly promote water dissociation and optimize the free energy of H* adsorption, indicating high catalytic activity towards the alkaline HER.

Gold Triangular Nanoprisms and Nanodecahedra: Synthesis and Interaction Studies with Luminol toward Biosensor Applications

Gold triangular nanoprisms and nanodecahedra (pentagonal bipyramids) were synthesized in the absence and presence of nanoseeds by a simple solvothermal synthesis through the reduction of Auric Chloride (HAuCl₄) with poly(vinylpyrrolidone) (PVP) in N,N-dimethylformamide (DMF), respectively. These gold nanoparticles exhibit two plasmon resonance bands. The interaction of these gold nanoparticles with luminol was investigated using UV-vis and fluorescence spectroscopy since hefty number of environmental and biological sensors are based on the combination of luminol and gold nanoparticles. The gold nanoparticles quenches the fluorescence of luminol through a static quenching mechanism, i.e., ground state complex formation, which was confirmed by both absorption spectroscopy as well as time-resolved fluorescence spectroscopy. The Stern-Volmer quenching constant and the effective quenching constant determine that gold nanodecahedra has more interaction with luminol than that of triangular gold nanoprisms. The distance between the gold nanoparticles and luminol, calculated using FRET theory, is less than 8 nm, which indicates efficient energy transfer during interaction. These results are expected to be useful for the development of novel sensors.

Recent advances and emerging trends in (BiO)2CO3 based photocatalysts for environmental remediation: A review

Traceless chemical ligations from O-acyl serine sites

Chemical ligation via O- to N-acyl transfer of O-acylated serine containing peptides affords serine containing native peptides via 8- and 11-membered cyclic transition states opening the door to a wide variety of potential applications to peptide elaboration. The feasibility of these traceless chemical ligations is feasible as supported by computation.

IFT and friccohesity study of formulation, wetting, dewetting of liquid systems using oscosurvismeter

Cytotoxic and protective DNA damage of three new diterpenoids from the brown alga Dictoyota dichotoma

CCDC 1812915: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

Highly-efficient blue neutral mononuclear copper(I) halide complexes containing bi- and mono-dentate phosphine ligands

Development of Cd2+ sensor based on BZNA/Nafion/Glassy carbon electrode by electrochemical approach

High-performance artificial nitrogen fixation at ambient conditions using a metal-free electrocatalyst

Conversion of naturally abundant nitrogen to ammonia is a key (bio)chemical process to sustain life and represents a major challenge in chemistry and biology. Electrochemical reduction is emerging as a sustainable strategy for artificial nitrogen fixation at ambient conditions by tackling the hydrogen- and energy-intensive operations of the Haber-Bosch process. However, it is severely challenged by nitrogen activation and requires efficient catalysts for the nitrogen reduction reaction. Here we report that a boron carbide nanosheet acts as a metal-free catalyst for high-performance electrochemical nitrogen-to-ammonia fixation at ambient conditions. The catalyst can achieve a high ammonia yield of 26.57 μg h^-1 mg^-1_cat. and a fairly high Faradaic efficiency of 15.95% at -0.75 V versus reversible hydrogen electrode, placing it among the most active aqueous-based nitrogen reduction reaction electrocatalysts. Notably, it also shows high electrochemical stability and excellent selectivity. The catalytic mechanism is assessed using density functional theory calculations.

Synthesis and evaluation of Quinoline-3-carbonitrile derivatives as potential antibacterial agents

Quality of Life in Kidney Donors: A Single-Center Experience

Our research indicates that most kidney donors have had a positive experience over the past four decades. Both male and female donors of all ages reported good long-term QOL, further enhanced by recognition and support from their families and friends. These findings provide further support for our current policy on organ donation.

Experimental (FT-IR, FT-Raman, UV and NMR) and quantum chemical studies on molecular structure, spectroscopic analysis, NLO, NBO and reactivity descriptors of 3,5-Difluoroaniline

Fabrication of hydrazine sensor based on silica-coated Fe2O3 magnetic nanoparticles prepared by a rapid microwave irradiation method

AlCl3-Promoted Cyclization of β-Keto Derivatives with in situ Generated Enamines under Solvent-Free High Speed Ball Milling: An Efficient One-Pot Access to Polysubstituted 1,4-Dihydropyridines

Section 1.1 General InformationChalcones 1 and enamine 2a were prepared according to reported procedures. 1,2All other chemical reagents were obtained from commercial suppliers and used without further purification.The mixer mill MM 400 (Retsch GmbH, Germany) was used for all ball-milling reactions, and the reaction vessels are titanium-alloyed jars lined with PTFE (neat volume: 4 mL) or stainless jars (neat volume: 25 mL).The milling balls are titanium-alloyed of 6.0 mm in diameter or stainless of 8.0 mm in diameter.Analytical thin-layer chromatography was performed on glass plates pre-coated with silica gel impregnated with a fluorescent indicator (254 nm), and the plates were visualized by exposure to ultraviolet light.Column chromatography was performed on silica gel using EtOAc/petroleum ether as the eluent.Melting points were determined on a XT-4 binocular microscope (Beijing Tech Instrument Co., China) and are uncorrected. 1H NMR spectra were recorded on a Bruker AV300, AV400 or AV500 NMR instrument.Chemical shifts are reported in parts per million with the solvent resonance as the internal standard (CDCl 3 , δ 7.26). 13C NMR spectra were recorded on an NMR instrument operated at 125 MHz or 100 MHz with complete proton decoupling.Chemical shifts are reported in parts per million with the solvent resonance as the internal standard (CDCl 3 , δ 77.16).HR-MS were recorded on a Bruker MicroTOF-QII mass instrument (ESI). General Procedure for the Synthesis of Product 5 (5a as an Example)Aniline (3a, 0.55 mmol), ethyl acetoacetate (4a, 0.55 mmol), AlCl 3 (0.125 mmol), together with two titanium-alloyed balls of 6.0 mm in diameter, were introduced into a titanium-alloyed jar lined with PTFE (4 mL).The same mixture was also introduced into a second parallel jar.The two reaction vessels were sealed with screw caps, fixed on the vibration arms of a ball-milling apparatus (mixer mill MM400, Retsch GmbH, Haan, Germany) and were vibrated vigorously at a rate of 1800 rounds per minute (30 Hz) at room temperature for 30 minutes.After the vessels were opened, chalcone (1a, 0.5 mmol) and AlCl 3 (0.25 mmol) were added into the two parallel jars, respectively.The vessels were sealed again and continued to vibrate for 60 minutes (30 Hz).The resulted mixtures were combined and directly loaded on silica gel chromatography column for purification with EtOAc/petroleum ether as the eluent, affording the desired product 5a as white solid. General Procedure for the Synthesis of Product 6 (6a as an Example)

Contributors

CCDC 2091269: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

CCDC 774231: Experimental Crystal Structure Determination

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.