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1-二苯甲基-3-羟基氮杂环丁烷(1)经过对甲苯磺酰氯取代、叠氮化及还原反应合成了药物中间体--1-二苯甲基-3-氨基氮杂环丁烷(4);1经过氧化、氰基化与还原反应合成了1-二苯甲基-3-羟基-3-氨甲基氮杂环丁烷(8).4和8的结构经1H NMR表征. 相似文献
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应用搅拌棒吸附萃取-热脱附-气质联用技术分析人工唾液捕集吸收的卷烟主流烟气成分 总被引:2,自引:0,他引:2
采用人工唾液捕集卷烟主流烟气,应用搅拌棒吸附萃取法(SBSE)提取其中的化学成分,利用热脱附(TD)-气相色谱-质谱(GC-MS)进行分析。对脱附温度、脱附时间、冷阱温度、萃取时间及NaCl加入量等影响因素进行考察,获得优化的实验条件。在优化条件下,同一样品的6次测定所得44个组分的峰面积的相对标准偏差(RSD)平均值小于10%,说明所建方法重现性较好。应用本方法分析某品牌卷烟烟气成分的结果表明:SBSE-TD-GC-MS联用技术可用于人工唾液捕集吸收的烟气化学成分的快速分析测定。 相似文献
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The electrochemical behavior of monomolybdenum-substituted Keggin-type polyoxometalates [XW11MoO40]^n- (X=P, Si, Ge with n=3, 4) was studied in aqueous and N,N-dimethylformamide (DMF) solution. These anionic clusters showed different electrochemical behaviors in two kinds of media. The initial potentials of [XW11MoO40]^n- in DMF were more negative than those in aqueous solution, showing a lower oxidation ability of [XW11MoO40]^n- in DMF. The investigation results suggested that the redox properties of polyoxometalates be tuned by the substitutions of Mo for W and by replacing aqueous solution with organic solvent, which provided valuable information to rationally choose polyoxometalates (POM) in preparation of POM-based organic/inorganic hybrid materials. 相似文献
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