Epigallocatechin-3-gallate induces apoptosis, inhibits proliferation and decreases invasion of glioma cell

Epigallocatechin-3-gallate （EGCG）, a major polyphenol in green tea, has been considered a potential therapeutic and chemopreventive agent for cancer. Glioma is a malignant tumor with high mortality but effective therapy has not yet been developed. In this study, we found that EGCG induced apoptosis in U251 glioma cells via the laminin receptor （molecular weight 67kDa） in a time- and dose-dependent manner, decreased their invasiveness and inhibited their proliferation. The mitogen-activated protein kinase pathway was shown to be involved in glioma cell apoptosis and proliferation. Furthermore, the mRNA levels of matrix metalloproteinase （MMP）-2 and MMP-9 were reduced after EGCG treatment. These results suggest that EGCG has important therapeutic effects with low toxicity and side-effects, and could be used in cancer chemoprevention.

Exploring BH_2CN-based hydrophobic hypergolic fuels and effective fuel“additives”: Imidazolylidene cyanoborane complexes

Two hydrophobic imidazolylidene-cyanoborane complexes were prepared by the introduction of{BH2 CN} into the molecular formula via treatment of imidazolium iodide and Na BH3 CN avoiding literature’s tedious and hazardous procedures. These two complexes were fully characterized using IR spectroscopy,1 H NMR and13C NMR spectroscopy and high-resolution mass spectrometer. The X-Ray structure of NHC-1 has been determined. NHC-2 was proved to be hypergolic with WFNA and displayed the attractive properties such as water immiscibility, wide liquid range（Tg= -22C）, short ignition delay time（13 ms）, high density（0.98 g/cm3）, good density impulse（r Isp, 347 s g cm-3）, showing the promising application potential as a fuel and an efficient fuel additive.

Synthesis and Improved Properties of Hypergolic Boronium-Based Ionic Liquids

A series of asymmetric monoimidazolium dihydroboronium-based ionic liquids （ILs） were synthesized from amine-boranes. All the resulting ILs were fully characterized by 1H and 13C NMR, IR spectroscopy, elemental analysis or high resolution mass spectrum. Compared with the symmetric bisimidazolium dihydroboronium-based ILs, these new ILs exhibited improved properties with shorter ignition delay times （IDs）, higher densities, and lower phase transition temperature showing the promising application potential as green propellants. A series of asymmetric monoimidazolium dihydroboronium-based ionic liquids （ILs） were synthesized from amine-boranes. All the resulting ILs were fully characterized by 1H and 13C NMR, IR spectroscopy, elemental anal- ysis or high resolution mass spectrum. Compared with the symmetric bisimidazolium dihydroboronium-based ILs, these new ILs exhibited improved properties with shorter ignition delay times （IDs）, higher densities, and lower phase transition temperature showing the promising application potential as green propellants.

Synthesis and properties of energetic salts based on 3-nitro-5-nitroimino-1,2,4-oxadiazole

A series of 3-nitro-5-nitroimino-1,2,4-oxadiazole-based energetic salts were synthesized from 3-nitro-5-nitroimino-1,2,4-oxadiazole anion and nitrogen-rich cations. They were fully characterized by IR,elemental analysis and NMR spectroscopy. The structure of triaminoguanidinium salt（1-e） was confirmed by single crystal X-ray diffraction. All salts showed good thermal stability with decomposed temperature ranging from 155 8C to 258 8C, and positive heats of formation from 226.0 k J/mol to554.1 k J/mol. Thus, the theoretic detonation pressure was predicted from 28.70 GPa to 37.60 GPa and velocities from 8526 m/s to 9354 m/s. Among them, guanidinium salt（1-c） exhibited both high decomposition temperature（258 8C） and detonation velocity（9319 m/s）.

Synthesis and characterization of functionalized 1,3-bis(2-alkyltetrazol-5-yl)triazenes

A series of 1,3-bis（2-alkyltetrazol-5-yl）triazenes have been synthesized in high yields by treatment of sodium nitrite and hydrochloric acid with substituted-5-aminotetrazoles. All compounds were fully characterized using IR spectroscopy,~1H NMR and^（13） C NMR spectroscopy and high resolution mass spectrometer（HRMS）. Most of these triazenes exhibit good detonation performance comparable with TNT and low melting points ranging from 81°C to 106°C, which are suitable for melt-cast explosives.Among these compounds, 1,3-bis（2-azidoethyltetrazol-5-yl）triazene（2g） displays a low melting point（106°C）, moderate onset decomposition temperature（183°C） and good detonation performance（D：7087 m/s; P： 17.6 GPa）.

Non-superimposable mirror image crystals of enantiomers by spontaneous resolution and the chiral discrimination mechanism

Non-superimposable mirror image crystals of both enantiomers（S/R） of cyclicγ-alkenyl alcohol（2） have been recognized and remarkably identified by the naked eye.More interestingly,both crystals are an outcome of most astonishingly H-bond and intermolecularσ/π-πinteractions.They accounted for the relatively rare and less predictable spontaneous resolution with optical purity 〉99%ee from the racemic mixture.The chiral discrimination mechanism of this spontaneous resolution has also been proposed.