Chemistry

Hole-Transporting Small Molecules Based on Thiophene Cores for High Efficiency Perovskite Solar Cells
Two new electron-rich molecules, 2,3,4,5-tetra[4,4′-bis(methoxyphenyl)aminophen-4“-yl]-thiophene (H111) and 4,4′,5,5′-tetra[4,4′-bis(methoxyphenyl)aminophen-4”-yl]-2,2′-bithiophene (H112), which contain thiophene cores with arylamine side groups, are reported. When used as the hole-transporting material (HTM) in perovskite-based solar cell devices, power conversion efficiencies of...


Effect of the introduction of oxide ion vacancies into cubic fluorite-type rare earth oxides on the NO decomposition catalysis
Cubic fluorite-type solid solutions based on Pr6O11 and CeO2 were synthesized and oxide anion vacancies were intentionally introduced into the cubic fluorite-type lattice through the charge compensating mechanism by Mg2+ and/or Ca2+ doping into their lattices. The oxide anion vacancies bring about positive effect on NO decomposition catalysis. The reason for the increase in the catalytic activi...
Crystal structure and luminescence properties of a novel red-emitting phosphor BaAlBO3F2:Eu3+
A series of novel red-emitting phosphors BaAlBO3F2:xEu3+ (0.001≤x≤0.08) were first synthesized via a high temperature solid-state reaction. X-ray diffraction and photoluminescence spectroscopy were used to characterize the crystal structure and photoluminescence properties of the phosphor, respectively. The phosphor can be effectively excited with a 395nm light, and shows a dominant 5D0−7...


Graphene/TiO2 nanocomposite based solid-phase extraction and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry for lipidomic profiling of avocado (Persea americana Mill.)
Phospholipids possess important physiological, structural and nutritional functions in biological systems. This study described a solid-phase extraction (SPE) method, employing graphene and titanium dioxide (G/TiO2) nanocomposite as sorbent, for the selective isolation and enrichment of phospholipids from avocado (Persea americana Mill). Based on the principal that the phosphoryl group in the p...
A sensitive and selective detection method for thiol compounds using novel fluorescence probe
In this work, a sensitive and selective detection method based on fluorescence resonance energy transfer (FRET) was developed for analyzing thiol compounds by using a novel fluorescent probe. The new fluorescent probe contains a disulfide bond which selectively reacts with nucleophilic thiolate through the thiol-disulfide exchange reaction. An obvious fluorescence recovery can be observed upon ...


Colorimetric detection of sulfide based on target-induced shielding against the peroxidase-like activity of gold nanoparticles
Colorimetric recognition and sensing of sulfide with high sensitivity was proposed based on target-induced shielding against the peroxidase-like activity of bare gold nanoparticles. Significant features of the new assay system are its simplicity and cost-effectiveness. The recognition of sulfide by bare gold nanoparticles can be fulfilled in a few seconds and the assay can be accomplished in ab...
Quantification of 5-methylcytosine, 5-hydroxymethylcytosine and 5-carboxylcytosine from the blood of cancer patients by an Enzyme-based Immunoassay
Genome-wide aberrations of the classic epigenetic modification 5-methylcytosine (5mC), considered the hallmark of gene silencing, has been implicated to play a pivotal role in mediating carcinogenic transformation of healthy cells. Recently, three epigenetic marks derived from enzymatic oxidization of 5mC namely 5-hydroxymethylcytosine (5hmC), 5-formylcytosine (5fC) and 5-carboxylcytosine (5caC...

Colorimetric and fluorometric dual-modal probes for cyanide detection based on the doubly activated Michael acceptorand their bioimaging applications
In this study, we synthesized CTB and CB probes based on doubly activated Michael acceptors to selectively detect cyanide (CN−) anions through a one-step condensation reaction of coumarinylacrylaldehyde with the corresponding derivatives of malonyl urea (thiourea). Through the conjugated addition of CN− to the β-site of the Michael acceptor, both probes displayed colorimetric and fluoromet...
Laser-based ion mobility spectrometer for the direct analysis of aromatic compounds in liquids
A laser-based ionization source for the direct analysis of liquid samples in ion mobility (IM) spectrometry is presented and characterized. Ionization of aromatic substances in liquids is achieved, analogous to atmospheric pressure laser ionization (APLI) in mass spectrometry, by vaporizing the liquid and subsequently ionizing the aromatic substances by resonance-enhanced multiphoton ionization...

Density functional theory study of transition metals doped B80 fullerene
Density functional theory calculations have been carried out to investigate 3d, Pd and Pt transition metal (TM) atoms exohedrally and endohedrally doped B80 fullerene. We find that the most preferred doping site of the TM atom gradually moves from the outer surface (TM = Sc), to the inner surface (TM = Ti and V) and the center (TM = Cr, Mn, Fe and Zn), then to the outer surface (TM = Co, Ni, Cu...
Comparative Analysis of the Olfactory Properties of Silicon/Germanium/Tin Analogues of the Lily-of-the-Valley Odorants Lilial and Bourgeonal
The silicon/germanium/tin analogues of the lily-of-the-valley odorants lilial (rac-1 a), compounds rac-1 b, rac-1 c, and rac-1 d, and bourgeonal (2 a), compounds 2 b, 2 c, and 2 d, were synthesized and characterized for their olfactory properties, including GC–olfactometry studies. Compounds rac-1 a–c and 2 a–c possess a typical lily-of-the-valley odor, whereas the sta...

Activated-Carbon-Supported Gold–Cesium(I) as Highly Effective Catalysts for Hydrochlorination of Acetylene to Vinyl Chloride
The synthesis of vinyl chloride from acetylene by hydrochlorination has gained tremendous interest in coal-based chemistry. Bimetallic gold–cesium(I)/activated carbon (AuCsI/AC) catalysts were found to have a higher catalytic activity and stability for acetylene hydrochlorination when compared with gold catalysts. Over 1 Au4 CsI/AC catalysts, the maximum conversion of acetylene was 94 %...
Understanding Aqueous Electrolyte Stability through Combined Computational and Magnetic Resonance Spectroscopy: A Case Study on Vanadium Redox Flow Battery Electrolytes
The investigation of the vanadium electrolyte stability issue on the molecular-level solvation structure and the dynamics has led to the successful designing of mixed acid-based vanadium electrolytes. This new mixed-acid based electrolyte system render approximately 70 % increase in energy density (≈40 Wh L−1) and approximately 80 % increase in stable temperature window (−10 to +5...
Silk cocoons as natural macro-balloon fillers in novel polyurethane-based syntactic foams
With the growing interest in material technologies incorporating bio-based constituents, substitutes to both conventional polymer foams and their synthetic reinforcements are being sought. In this article, we characterise the physical, mechanical, thermal and environmental resistance properties of novel syntactic foams that are based on silkworm cocoons as natural, hollow particulate fillers fo...
Biorenewable ROMP-based Thermosetting Copolymers from Functionalized Castor Oil Derivative with Various Cross-linking Agents
A new norbornenyl-functionalized castor oil alcohol (NCA) was synthesized and ring-opening metathesis copolymerized separately with two norbornene-based cross-linking agents: dicyclopentadiene (DCPD) and a bifunctional norbornene crosslinker (CL). Isothermal differential scanning calorimetry (DSC) was used to examine the cure behavior of NCA/DCPD and NCA/CL resins, through which a reasonable cu...