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盐酸芦氟沙星荷移反应及荧光光谱性质 总被引:2,自引:0,他引:2
研究了盐酸芦氟沙星(RH)与电子受体四氟苯醌(TFQ)及四氯苯醌(TCQ)之间的荷移反应。实验表明:在甲醇体系中,RH与TFQ可迅速反应生成稳定的荷移络合物,最大激发波长和发射波长较RH向长波方向分别位移122nm和205nm;荧光强度较RH增强13倍。研究了各种溶剂对络合物形成的影响,并探讨了发光机理。在0.1—30μmoL/L浓度范围内,RH与TFQ形成的络合物荧光强度与浓度呈良好线性关系,检出限为0.017μmol/L。该体系的抗干扰能力及稳定性较好。本方法用于胶囊中盐酸芦氟沙星含量的测定,RSD为0.41%:回收率为97.1%-101.9%,结果满意。 相似文献
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Samples of polyphenylsilsisquioxane (PPSQ)using CaF_2 or MgF_2 as the main catalysts hadbeen prepared under different polymerization conditions. The results were treated on anorthogonal design L_9 (3~4). All weight-average molecular weights (M_W ) of PPSQ had beenmeasured by gel permeation chromatography (GPC). Effects of polymerization conditionsincluding reaction temperature, composition of the dual catalysts (CaF_2 or MgF_2 and DCC),mixture of solvents and reaction time on M_W of PPSQ have been discussed. The quantity of thecatalysts is the most important factor that affects M_W of PPSQ. Reaction temperature is thesecond important factor. Appropriate polymerization condition has been established to get PPSQwith high M_W. 相似文献
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The ladderlike structure of PPSQ synthesized by using four kinds of catalysts (MgF_2,LiF, KOH and DCC) at different polymerization conditions has been investigated by IRand NMR. In the system using MgF_2 as the main catalyst, the most important factorwhich affects the ladderlike structure of PPSQ is the composition of the dual catalysts,MgF_2 and DCC. PPSQ prepared by using KOH as the catalyst has the highest regularityof ladderlike structure among all samples. PPSQ with different degree of ladder regularitycan be obtained by choice of polymerization conditions. 相似文献
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正电子湮没技术(PAT)在高分子材料中的应用(上) 总被引:3,自引:0,他引:3
本文引用70多篇文献,综述了正电子湮没技术(主要是正电子湮没寿命技术)近10年来在高分子材料各个领域中的应用。 相似文献