以下为句子列表:
英文: Abstract: Polyphenylacetylenes were synthesized by [Rn(nbd)Cl]2 and WCl6/Ph4Sn catalyst systems in N2 at room temperature.Polymers with high yield and high molecular weight were obtained.Their structures were characterized by UV,IR,NMR and GPC,respectivel
中文: 文摘:使用有机金属铑、金属钨/四苯基锡催化剂体系聚合苯乙炔,分别获得了高产率和高分子量的聚苯乙炔.使用UV,IR,NMR,GPC等分别对聚合物结构进行了表征.采用不同波长的激发光对聚合物荧光性能进行研究,详细分析了聚合物结构与荧光性能之间的关系.研究结果发现,不同聚合物结构对聚合物荧光性能产生很大影响,规整性高的聚合物,将有较高的发光量子效率;聚合物规整性差,将可能导致多个荧光发光结构点,其荧光强度降低.聚合物荧光光谱研究将对某些共轭聚合物结构的规整性分析提供一些有用的信息.
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英文: Acetylation between alcohol and benzoyl oxide was carried out using ZnBr2 as a Lewis acid catalyst in solvent-free condition. Some structures were characterized by NMR and IR.
中文: 以溴化锌为催化剂,在无溶剂条件下实现了醇与苯甲酸酐的酰化反应,部分产物经NMR和IR表征。
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英文: At B LYP/- G ,B LYP/- G , B LYP/- ++G levels and by GIAO method, NMR spectrum of the titled compound has been studied.
中文: 并用GIAO分别在B LYP/ G 、B LYP/ G 和B LYP/ ++G 水平对该化合物的核磁共振谱进行了研究。
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英文: Based on NMR spectra and other methods,they were identified as β-sitosterol ,bis(-ethylheptyl)phythalate ,phytol ,pinosylvin and -hydroxy-trans-stilbene--O-β-D-glucoside .
中文: 地上部分首次分离得到个化合物,运用波谱技术确定其结构分别为:β谷甾醇 ,邻苯二甲酸双(乙基庚基)酯 ,叶绿醇 ,银松素( ,二羟基二苯乙烯) , 羟基二苯乙烯OβD葡萄糖苷 。
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英文: Based on spectral IR,MS, H NMR, C NMR and physico chemical constant analysis,they were identified as 7 epi taxol B (Ⅰ),, diacetoxy 0 deacetyl baccatin Ⅲ (Ⅱ), taxol C 7 xylose (Ⅲ),taxol (Ⅳ), epi ursolic acid (Ⅴ).
中文: 通过理化常数及IR、MS、H-NMR、 C-NMR分析,鉴定为7-表-紫杉醇B(Ⅰ)、, -二乙酰基-0-去乙酰基巴卡亭Ⅲ(Ⅱ)、紫杉醇C-7-木糖甙(Ⅲ)、紫杉醇(Ⅳ)和 -表-熊果酸(Ⅴ)。
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