(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]是新型含能钙钛矿化合物的典型代表,需明确其热分解行为、热分解机制及感度特性,以推动其在配方中的应用。以差示扫描量热-热重分析方法实现了分解放热量、分解温度等参数的获取;以动力学模拟计算...(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]是新型含能钙钛矿化合物的典型代表,需明确其热分解行为、热分解机制及感度特性,以推动其在配方中的应用。以差示扫描量热-热重分析方法实现了分解放热量、分解温度等参数的获取;以动力学模拟计算解析了相关分解机理;以同步热分析-红外-质谱联用技术结合原位红外技术探索了(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]的分解产物及分解历程;以国军标法获得了热感度、摩擦感度与撞击感度参数。结果表明:在10℃·min^(-1)的升温速率下,(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]分解放热量为4227 J·g^(-1),分解温度则达到345℃,高于黑索今(RDX)、奥克托今(HMX)、六硝基六氮杂异伍兹烷(CL-20)等多数现役含能材料,显示了优异的热稳定性;分解产物研究表明其立方笼状骨架有效稳定了内部结合的有机物分子,使其热稳定性较高。此外,(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]在100℃下加热48 h的放气量约0.04 m L·g^(-1),撞击感度与机械感度分别为32%和80%,优于RDX和HMX。展开更多
Four new glycosides including a eudesmane-type sesquiterpenoid（1）, a guaiane-type sesquiterpenoid（2）, and two C_（14）-polyacetylenes（3, 4） were isolated from the rhizomes of Atractylodes lancea. Their structure...Four new glycosides including a eudesmane-type sesquiterpenoid（1）, a guaiane-type sesquiterpenoid（2）, and two C_（14）-polyacetylenes（3, 4） were isolated from the rhizomes of Atractylodes lancea. Their structures were elucidated by means of spectroscopic and spectrometric analyses（UV, IR, 1D and 2D NMR, and HR-ESIMS）. The absolute configurations of their aglycones were established based on the experimental and calculated electronic circular dichroism（ECD）, whereas those of monosaccharide moieties were determined by the GC method after chiral derivatization. Compound 4 showed weak anti-inflammatory effects on the LPS-induced NO production in microglia BV2 cells at a concentration of10μmmolL^（-1）.展开更多
Organic materials, especially the carbonyl compounds, are promising anode materials for room temperature sodium-ion batteries owing to their high reversible capacity, structural diversity as well as eco-friendly synth...Organic materials, especially the carbonyl compounds, are promising anode materials for room temperature sodium-ion batteries owing to their high reversible capacity, structural diversity as well as eco-friendly synthesis from bio-mass. Herein, we report a novel anthraquinone derivative, C_(14)H_6 O_4 Na_2 composited with carbon nanotube(C_(14)H_6 O_4 Na_2-CNT), used as an anode material for sodium-ion batteries in etherbased electrolyte. The C_(14)H_6 O_4 Na_2-CNT electrode delivers a reversible capacity of 173 mAh g^(-1) and an ultra-high initial Coulombic efficiency of 98% at the rate of 0.1 C. The capacity retention is 82% after 50 cycles at 0.2 C and a good rate capability is displayed at 2 C.Furthermore, the average Na insertion voltage of 1.27 V vs. Na^+/Na makes it a unique and safety battery material, which would avoid Na plating and formation of solid electrolyte interface. Our contribution provides new insights for designing developed organic anode materials with high initial Coulombic efficiency and improved safety capability for sodium-ion batteries.展开更多
文摘(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]是新型含能钙钛矿化合物的典型代表,需明确其热分解行为、热分解机制及感度特性,以推动其在配方中的应用。以差示扫描量热-热重分析方法实现了分解放热量、分解温度等参数的获取;以动力学模拟计算解析了相关分解机理;以同步热分析-红外-质谱联用技术结合原位红外技术探索了(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]的分解产物及分解历程;以国军标法获得了热感度、摩擦感度与撞击感度参数。结果表明:在10℃·min^(-1)的升温速率下,(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]分解放热量为4227 J·g^(-1),分解温度则达到345℃,高于黑索今(RDX)、奥克托今(HMX)、六硝基六氮杂异伍兹烷(CL-20)等多数现役含能材料,显示了优异的热稳定性;分解产物研究表明其立方笼状骨架有效稳定了内部结合的有机物分子,使其热稳定性较高。此外,(C_(6)H_(14)N_(2))[Na(ClO_(4))_(3)]在100℃下加热48 h的放气量约0.04 m L·g^(-1),撞击感度与机械感度分别为32%和80%,优于RDX和HMX。
基金funded by the National Science and Technology Project of China(No.2012ZX09301002-001003)
文摘Four new glycosides including a eudesmane-type sesquiterpenoid（1）, a guaiane-type sesquiterpenoid（2）, and two C_（14）-polyacetylenes（3, 4） were isolated from the rhizomes of Atractylodes lancea. Their structures were elucidated by means of spectroscopic and spectrometric analyses（UV, IR, 1D and 2D NMR, and HR-ESIMS）. The absolute configurations of their aglycones were established based on the experimental and calculated electronic circular dichroism（ECD）, whereas those of monosaccharide moieties were determined by the GC method after chiral derivatization. Compound 4 showed weak anti-inflammatory effects on the LPS-induced NO production in microglia BV2 cells at a concentration of10μmmolL^（-1）.
基金supported by funding from the National Key Technologies R&D Program (2016YFB0901500)the NSFC (11234013 and 51421002)the One Hundred Talent Project of the Chinese Academy of Sciences
文摘Organic materials, especially the carbonyl compounds, are promising anode materials for room temperature sodium-ion batteries owing to their high reversible capacity, structural diversity as well as eco-friendly synthesis from bio-mass. Herein, we report a novel anthraquinone derivative, C_(14)H_6 O_4 Na_2 composited with carbon nanotube(C_(14)H_6 O_4 Na_2-CNT), used as an anode material for sodium-ion batteries in etherbased electrolyte. The C_(14)H_6 O_4 Na_2-CNT electrode delivers a reversible capacity of 173 mAh g^(-1) and an ultra-high initial Coulombic efficiency of 98% at the rate of 0.1 C. The capacity retention is 82% after 50 cycles at 0.2 C and a good rate capability is displayed at 2 C.Furthermore, the average Na insertion voltage of 1.27 V vs. Na^+/Na makes it a unique and safety battery material, which would avoid Na plating and formation of solid electrolyte interface. Our contribution provides new insights for designing developed organic anode materials with high initial Coulombic efficiency and improved safety capability for sodium-ion batteries.
