Reduction of aromatic ketones with the (dpp-BIAN)AlI(Et2O) complex

Reduction of benzophenone and 4,4′-bis(methoxy)benzophenone with the aluminum complex (dpp-BIAN)AlI(Et₂O) (1) containing the dianionic dpp-BIAN ligand (dpp-BIAN is 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene) affords the pinacolate complexes [(dpp-BIAN)AlI]₂[μ-O₂C₂Ph₄] (2) and [(dpp-BIAN)AlI]₂[μ-O₂C₂(C₆H₄OMe)₄] (3), respectively, which undergo the pinacolone rearrangement upon prolonged storage in diethyl ether to form [(dpp-BIAN)AlI]₂O (4). The reaction of 1 with fluoren-9-one produces stable pinacolate (dpp-BIAN)Al[μ-O₂(C₁₃H₈)₂] (7) and the (dpp-BIAN)AlI₂ complex (8). Compounds 2—4, 7, and 8 were characterized by ESR spectroscopy. Hydrolysis products of compounds 2 and 3 were characterized by ¹H NMR spectroscopy. The structures of complexes 4 and 7 were established by X-ray diffraction. dpp-BIAN is 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1134–1140, July, 2006.     

氯雷他定的结构分析

氯雷他定是一种高效抗过敏药。采用质谱、红外光谱、核磁共振氢谱、碳谱以及^1H检测的异核多量子相干相关谱等技术，对氯雷他定的分子结构进行了谱图解析。     

锰、铑原卟啉IX-二甲酯配合物共振拉曼光谱研究

合成了MnPPCl,RhPPCl,RhPPN3,RhPP(CO)Cl四种配合物 (PP =ProtophyrinIXDimethy1Ester) ,用元素分析、红外吸收光谱及紫外吸收光谱确定了配合物的组成 ,测定了它们的共振拉曼光谱 ,对特征谱带进行了归属。分析了拉曼谱带和电子吸收谱带变化的原因 ,提出了谱带频率的变化受金属离子外层d电子和轴配体的影响。     

群青颜料呈色机理的电子顺磁共振研究

研究了阿富汗青金石矿石、敦煌石窟青金石颜料、合成群青的呈色机理。实验表明三者均有ｇ＝２．０２９峰，前两者多一个ｇ＝２．０４７峰，４００℃时，ｇ＝２．０４７峰变平，６００℃时消失。ｇ＝２．０２９峰随温度升高而增强，８００℃时增强放慢，颜色也随温度变深。在Ｍ０Ｏ３／ＳｉＯ２和Ｍ０Ｏ３／Ａｌ２Ｏ３表面上，Ｓ２＾－的ＥＰＲ有ｇ１＝２．０４７，ｇ２＝２．２０８，ｇ３＝１．９９８三个分量。因此，群青、青金石和     

磁共振方法研究12-钨磷酸水合物中水分子的运动状态

本文使用以Cu(Ⅱ)为顺磁探针的ESR以及宽谱线~1H-NMR等磁共振方法,研究了12-钨磷酸水合物中水分子的运动状态,结果表明水合水的活动性不仅取决于温度,而且还与12-钨磷酸水合物中的含水量有关。     

多晶顺磁共振谱的拟合

对电子自旋1/2≤S<3.5,核自旋1/2≤I<4.5和配体少于10个的顺磁体系的多晶EPR谱的拟合进行研究。在VAX-11/785计算机上用FORTRAN语言建立EPR谱模拟程序包,计算了多个例子,获得较为满意的结果。     

A resonance light scattering method for determination of DNA using Ru(bpy)2PIP(V)2+

A novel method for DNA detection is proposed that is based on the enhancement of resonance light scattering (RLS) of Ru(bpy)₂PIP(V)²⁺ at pH 2.7. Under optimum conditions, good linear relationships were obtained in the wide concentration range of 16–5120 ng mL⁻¹. The linear equation is I _RLS = 13.15 + 171.4 c (μg mL⁻¹), the correlation coefficient (r) is 0.9999. The detection limit of calf thymus DNA is 5.02 ng mL⁻¹. Plasmid DNA extracted from bacillus subtilis was determined by the method with satisfactory results.     

氢谱在甾醇类化合物定量和纯度分析中的应用

用^1HNMR谱可定量确定繁茂膜海绵(Hymeniacidon perleve)中分离得到的结构类似的甾醇类化合物的含量，这种方法是对鉴定分析组成复杂而性质很相近的天然甾醇化合物的新思路。     

2-芳基硫杂脯氨酸结构特征的研究

对12种2-芳基硫杂脯氨酸进行了红外光谱和核磁共振谱测定,对其中两个化合物作了质谱测定。结果表明,这类化合物固态时主要以两性离子形式存在;有较强的分子离子峰,是一类较稳定的化合物。它们还存在一对非对映异构体,芳环上的取代基对芳环电子云密度的影响较大,而对四氢噻唑环的影响较小。