Refine
Language
- English (22)
Is part of the Bibliography
- yes (22)
Keywords
- AgI (2)
- Ionic liquids (2)
- Niobium (2)
- cluster (2)
- electrochemistry (2)
- fluorescent dyes (2)
- heterocycles (2)
- ionic conductivity (2)
- ionic liquids (2)
- ligands (2)
- photophysics (2)
- stokes shift (2)
- sulfur (2)
- thermal properties (2)
- Antimicrobial activity (1)
- Arenes (1)
- Bacteria (1)
- Birch reduction (1)
- Cluster (1)
- Cluster chemistry (1)
- Ethers (1)
- Flavonoids (1)
- Hydrogen Bonds (1)
- Hydrogenation (1)
- Lactones (1)
- Mixtures (1)
- N-butylpyridinium bromide (1)
- Structure Determination (1)
- Synthesis (1)
- Synthetic methods (1)
- anthracene (1)
- bandgap (1)
- charge transfer (1)
- copper (1)
- crystal structure (1)
- crystals (1)
- dipole-dipole interaction (1)
- electron transfer (1)
- fluorescence (1)
- fumaronitrile (1)
- halide (1)
- heterocyclic ligand (1)
- ionic liquid (1)
- isomerism (1)
- liquids (1)
- lone-pair-pi interactions (1)
- macrocycles (1)
- maleonitrile (1)
- metal-containing ionic (1)
- metal-containing ionic liquids; (1)
- molecules (1)
- niobium (1)
- structure elucidation (1)
- tetrahalido metallates (1)
- tetrahalidometallates (1)
- transition metals (1)
Institute
A new solid-state material, N-butyl pyridinium diiodido argentate(I), is synthesized using a simple and effective one-pot approach. In the solid state, the compound exhibits 1D ([AgI2](-))(n) chains that are stabilized by the N-butyl pyridinium cation. The 1D structure is further manifested by the formation of long, needle-like crystals, as revealed from electron microscopy. As the general composition is derived from metal halide-based ionic liquids, the compound has a low melting point of 100-101 degrees C, as confirmed by differential scanning calorimetry. Most importantly, the compound has a conductivity of 10(-6) S cm(-1) at room temperature. At higher temperatures the conductivity increases and reaches to 10(-4 )S cm(-1) at 70 degrees C. In contrast to AgI, however, the current material has a highly anisotropic 1D arrangement of the ionic domains. This provides direct and tuneable access to fast and anisotropic ionic conduction. The material is thus a significant step forward beyond current ion conductors and a highly promising prototype for the rational design of highly conductive ionic solid-state conductors for battery or solar cell applications.
FicucariconeD (1) and its 4 '-demethyl congener 2 are isoflavones isolated from fruits of Ficus carica that share a 5,7-dimethoxy-6-prenyl-substituted A-ring. Both naturalproducts were, for the first time, obtained by chemical synthesisin six steps, starting from 2,4,6-trihydroxyacetophenone. Key stepsare a microwave-promoted tandem sequence of Claisen- and Cope-rearrangementsto install the 6-prenyl substituent and a Suzuki-Miyaura crosscoupling for installing the B-ring. By using various boronic acids,non-natural analogues become conveniently available. All compoundswere tested for cytotoxicity against drug-sensitive and drug-resistanthuman leukemia cell lines, but were found to be inactive. The compoundswere also tested for antimicrobial activities against a panel of eightGram-negative and two Gram-positive bacterial strains. Addition ofthe efflux pump inhibitor phenylalanine-arginine-beta-naphthylamide(PA beta N) significantly improved the antibiotic activity in mostcases, with MIC values as low as 2.5 mu M and activity improvementfactors as high as 128-fold.