【摘 要】
：
The target compound Ⅳ (C20H21N) was synthesized through four-step reactions and structurally determined by single-crystal X-ray diffraction.The crystal of compound Ⅳ is in the orthorhombic system,space group Fdd2 with a =41.178(19),b =30.389(8),c =4.8182(
【机 构】
：
State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines,Colle
论文部分内容阅读
The target compound Ⅳ (C20H21N) was synthesized through four-step reactions and structurally determined by single-crystal X-ray diffraction.The crystal of compound Ⅳ is in the orthorhombic system,space group Fdd2 with a =41.178(19),b =30.389(8),c =4.8182(17) (A),β =90°,C20H21N,Mr =275.38,Dc =1.213 g/cm3,V=6029(4) (A)3,Z =16,F(000) =2368,μ(MoKa) =0.527 mm-1,T=240(2) K,2200 independent reflections with 1233 observed ones (I＞ 2σ(Ⅰ)),R =0.1285 and wR =0.2589 with GOF =1.050 (R =0.2058 and wR =0.3055 for all data).A one-dimensional interaction model of the title compound was formed by one kind of π-π interactions between the two phenyl rings of the adjacent molecules at upper and lower levels.The inhibition to the strand transfer process of HIV-1 integrase of the target compound was also evaluated.
其他文献
In this paper,two cocrystals 1 and 2 with the same chemical composition[L1.L2](L1 =bis(4\'-pyridyl)-TTF,L2 =4,4\'-diiodophenyl) were synthesized by slow diffusion with different solvent systems.Cocrystals 1 and 2 were characterized by single-crystal X
教育数据挖掘技术是当前研究的热点之一.针对学生成绩预测准确率较低的问题,提出以宽度学习(broad learning,BL)算法为个体学习器的加权集成学习算法.首先,使用宽度学习算法来预测学生成绩,由于单个分类器的性能不够稳定,对数据变化比较敏感,故试验采用加权集成方法对宽度学习算法进行改进;然后,将其与采用加权集成的决策树(decision tree,DT)算法和多层感知机神经网络(multi-layer perceptron neural net-works,MLP)算法的结果进行对比.结果表明,基于
为了研究蝶形光通信激光器的耦合机理,建立了芯片-透镜-单模光纤仿真模型,以耦合理论为基础,引入了容忍度概念,分析了空间位置误差对耦合效率的影响.通过对比透镜与光纤的各个方向的容忍度大小,结合焊后偏移现象,提出了先透镜后光纤的封装顺序,并搭建了实验平台进行验证.结果表明,在对比实验中,透镜优先封装所得到的功率最高可达1800μW,而光纤优先封装最高功率仅为1200μW;先对透镜进行封装,焊后偏移的效果要更好.该研究为蝶形器件实际封装生产提供可靠的参考.
A new quaternary metal thiophosphate,Cs2Ga3PS8,in triclinic Pi space group has been successfiully synthesized by a reactive-flux method.Its structural framework is derived from well-known AMⅢMⅣQ4 (A =alkali metal;MⅢ =Al,Ga,In;MⅣ =Si,Ge,Sn;Q =S,Se) system
为了加快颗粒全息图的重建速度,提出了一种基于多线程编译框架(OpenMP)和统一计算设备架构(CUDA)并行技术的二级并行架构颗粒全息图快速重建方法。第1级并行针对重建截面,第2级并行针对像素,同时在这两个维度进行并行重建,利用OpenMP实现图片级并行,利用CUDA实现像素级并行。以煤粉颗粒全息图为测试对象,同时采用单线程重建程序和二级并行重建程序进行全息重建,比较了两种计算方式的重建结果和计算
为了解决密集多目标检测中易造成的漏检问题,提出一种基于双邻域对比度的红外小目标检测算法。首先利用峰值搜索算法筛选出候选目标;再通过单尺度3层双邻域窗口遍历候选目标;最后利用双邻域对比度模型计算候选目标区域的最小灰度对比度,并用对角梯度因子增强对比度和抑制杂波。结果表明,与5种对比方法相比,该方法的背景抑制因子和对比度增益分别平均提高4.7倍和1.8倍,有效地抑制了杂波,增强了目标。该研究能够准确地
为了研究孔径接收对各向异性海洋湍流条件下水下无线光通信(UWOC)系统误比特率的影响,系统采用高斯光束传输,接收端通过孔径接收,在脉冲位置调制方式下通过各向异性海洋湍流信道.引入各向异性海洋湍流结构常数,通过对闪烁的形成原理和各向异性海洋湍流条件下闪烁系数的分析,数值模拟得到了在不同接收孔径和各向异性因子下,海洋湍流参量、传输距离、雪崩光电二极管(APD)平均增益和调制阶数对系统误比特率的影响.结果表明,相同各向异性因子和海洋湍流参量下,大孔径接收能有效提升系统误比特率性能;相同孔径直径和海洋湍流参量下,
为了探究涡旋空心光束在端面抽运Nd:YVO4微片激光器中的生成条件及其变化因素,构建了一种基于轴棱锥-透镜组生成环形抽运光的新方法.采用ZEMAX对抽运光进行了仿真分析,并基于热效应分析进行了模式匹配计算,通过实验成功得到了环形抽运光和环形空心激光输出,并通过实验验证了输出光为1阶涡旋光.结果表明,该方法能够生成光束大小可控的808nm抽运光,其光斑半径可随轴棱锥锥顶与透镜焦平面的相对位置快速变化;并且该抽运光能够使谐振腔长度为300μm的微片激光器输出稳定的1064nm 1阶拉盖尔-高斯涡旋空心光束.此
Based on CiteSpace software,big data bibliometrics analysis was carried out on the keywords of papers of photocatalytic materials published in 2020.Tracking the hotspots and directions can help young scholars to understand the latest progress.In the Web o
Two pyrazole-based zinc(Ⅱ) metal-organic frameworks,[(Zna(PDC)2(BDC)(H2O)2]n (compound 1,PDC =1H-pyrazole-3,5-dicarboxylic acid,BDC =benzene-1,4,-dicarboxylic acid) and[(Zn3(PDC)2(BPY)3(H2O)2]n(compound 2,BPY =4,4-bipyridine),were synthesized and characte