22 Result(s)
within
Zhishan **e
Chemistry
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Article
Highly efficient solution-processed organic photovoltaics enabled by improving packing behavior of organic semiconductors
Solution processability is a unique property of organic semiconductors. The compact and regular π-π stacking between molecules is paramount in the performance of organic optoelectronic devices. However, it is ...
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Article
New chiral N-heterocyclic olefin bifunctional organocatalysis in α-functionalization of β-ketoesters
N-heterocyclic olefins (NHOs) possess an electron-rich and highly polarized C=C double bond due to the donating property of nitrogen atoms. This feature imparts exocyclic carbon atom of NHOs with strong basicit.....
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Article
A Label-free Photoelectrochemical Sensor Based on Bi2S3@Nitrogen Doped Graphene Quantum Dots for Ascorbic Acid Determination
We report a photoelectrochemical(PEC) sensor for selective detection of ascorbic(AA) by introducing Z-scheme Bi2S3@nitrogen doped graphene quantum dots(Bi2S3@NGQDs) heterojunctions as efficient photoactive specie...
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Article
Stereodivergently asymmetric synthesis of chiral phosphorus compounds by synergistic combination of ion-pair catalyst and base
Stereodivergently constructing the designed products having adjacent multi-stereocenters via a given reaction, with excellent control of both absolute and relative configurations, presents one of the substantial ...
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Article
Recent progress in organic solar cells (Part II device engineering)
Organic solar cells (OSCs) have gained a rapid development in the past two decades and the power conversion efficiency (PCE) of single-junction OSC has recently approached 20%. The novel materials and device e...
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Article
Preparation of Bletilla striata polysaccharide composite aerogel and its application in adsorption of dyes and oils from water
In this study, Bletilla striata polysaccharide/powdered activated carbon (BSP/PAC) aerogels were prepared by freeze-drying of homogeneous mixture of BSP and PAC. Solvent replacement method, mechanical analysis, s...
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Article
Effect of Polymer Chain Regularity on the Photovoltaic Performance of Organic Solar Cells
In this work, regio-regular and random polymers (reg-PTF and ran-PTF) comprising benzodithiophene and 3-fluorothiophene units are developed to investigate the influence of polymer chain regularity on the photovol...
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Article
Recent progress in hydrodynamic characteristics research and application of annular centrifugal extractors
The annular centrifugal extractor (ACE) integrates mixing and separation. It has been widely used in many industrial fields because of its low residence time, compact structure, and high mass transfer efficien...
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Article
High-performance nonfused ring electron acceptor with a steric hindrance induced planar molecular backbone
Three nonfused ring electron acceptors (NFREAs) TTC6, TT-C8T and TT-TC8 were purposefully designed and synthesized. The molecular geometry can be adjusted by the steric hindrance of lateral substituents. Accor...
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Article
Recent progress in organic solar cells (Part I material science)
During past several years, the photovoltaic performances of organic solar cells (OSCs) have achieved rapid progress with power conversion efficiencies (PCEs) over 18%, demonstrating a great practical applicati...
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Article
Microbial composition and dynamic succession during the Daqu production process of Northern Jiang-flavored liquor in China
The microbial community structure and succession regularity of six key periods during high-temperature Daqu production were revealed using high-throughput sequencing to explore the factors affecting the flavor...
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Article
π-deficient pyridine ring-incorporated carbon nitride polymers for photocatalytic H2 evolution and CO2 fixation
The incorporation of organic molecules in the framework of carbon nitride (CN) polymers by co-polymerization is a conventional strategy to optimize the optoelectronic properties and thus improve the photoactiv...
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Article
Insight into Deactivation Reasons for Nanogold Catalysts Used in Gas-Phase Epoxidation of Propylene
Gas-phase epoxidation of propylene over nanogold catalysts has attracted extensive attention in recent years. Among the Au/Ti-based catalysts, Au/titanium silicalite-1 (denoted as Au/TS-1) shows excellent acti...
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Planar copolymers for high-efficiency polymer solar cells
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Article
Enhance the performance of polymer solar cells via extension of the flanking end groups of fused ring acceptors
Two new fused ring electron acceptors (FREAs) IDT-IC-T and IDT-IC-B with thienyl or phenyl substituents at the terminal INCN unit are synthesized. Theoretical calculations indicate that the two acceptors dominant...
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Article
High-performance polymer solar cells with >13% efficiency
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Article
Study on extraction of cobalt(II) by sodium laurate/pentan-1-ol/heptane/NaCl microemulsion system
A microemulsion consisting of sodium laurate, n-pentanol, n-heptane and NaCl solution was investigated for Co(II) extraction. The dilution method and conductivity method were used for the determination of structu...
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Article
Microfluidic synthesis of renewable biosorbent with highly comprehensive adsorption performance for copper (II)
A microsphere biosorbent with uniform size (CV = 1.52%), controllable morphology and component, and high mechanical strength was synthesized from chitosan by microfluidic technology combining with chemical cro...
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Article
Evaluating the photovoltaic properties of two conjugated polymers synthesized by Suzuki polycondensation and direct C-H activation
Two conjugated polymers HXS-1 and PDFCDTBT were prepared by direct C-H activation and Suzuki polycondensation and their chemical structures were characterized by 1H NMR spectroscopy. The molecular weight of conju...
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Article
Enhancement of two-photon absorption cross section and singlet-oxygen generation in porphyrin-cored star polymers
We report a newly synthesized polymer of a star-shaped porphyrin compound (TPA-FxP) with four oligofluorene arms at its meso positions with the pronounced enhancement of the two-photon properties and the generati...
