原子簇P12（D3d）的理论研究

利用Ｇａｕｓｓｉａｎ－９２程序在６－３１Ｇ基组下优化Ｐ１２（Ｄ３ｄ）构型，研究了３Ｐ４（Ｔｄ）→Ｐ１２（Ｄ３ｄ）的相对能量，计算结果为△Ｅ＝Ｅｐ１２（Ｄ３ｄ）－３Ｅｐ４（Ｔｄ）＝－７９．８４４ｋＪ／ｍｏｌ，优化Ｐ１２（Ｄ３ｄ）获得的Ｐ－Ｐ键键长接近于实验测得的Ｐ－Ｐ单键键长，并进一步在该基组下计算了Ｐ１２（Ｄ３ｄ）原子簇的振动频率，得到的全部为正频率，表明原子簇Ｐ１２的Ｄ３ｄ构型是位能面上的稳定点     

1，4二环己基取代六元瓜环与Na(Ⅰ)自组装实体的合成与晶体结构

A novel complex of a new 1,4-dicyclohexyl cucurbituril(DCYQ[6]) with sodium(Ⅰ) ion was synthesized, and the crystal structure was determined by X-ray diffraction technique. In this self-assembled entity both the cavity interaction of DCYQ[6] included a nitrate anion and the portal interaction of the dipole carbonyls of DCYQ[6] with sodium cations lead to form self assembled molecular capsules. The crystal structure of the entity shows a packing of the self assembled molecular capsules connected by hydrogen bonds of water molecules. CCDC: 271400.     

Solvothermal synthesis of nanoporous polymer chalk for painting superhydrophobic surfaces

Reported here is a facile synthesis of nanoporous polymer chalk for painting superhydrophobic surfaces. Taking this nanoporous polymer as a media, superhydrophobicity is rapidly imparted onto three typical kinds of substrates, including paper, transparent polydimethylsiloxane (PDMS), and finger skin. Quantitative characterization showed that the adhesion between the water droplet and polymer-coated substrates decreased significantly compared to that on the original surface, further indicating the effective wetting mode transformation. The nanoporous polymer coating would open a new door for facile, rapid, safe, and larger scale fabrication of superhydrophobic surfaces on general substrates.     

P14原子簇的理论研究

以Ｐ_２、Ｐ_４（Ｔｄ）、Ｐ_８（Ｃ_（２ｖ））及Ｐ_（１０）（Ｃ_（２ｖ））为结构单元设计了Ｐ_２＋Ｐ_４（Ｔ_ｄ）＋Ｐ_８（Ｃ_（２ｖ））→Ｐ_（１４）（Ｃ_ｓ）（Ａ）、Ｐｓ（Ｃ_（２ｖ）＋３Ｐ_２→Ｐ_（１４）（Ｃ_（２ｖ））（Ｉ）（Ｂ）、Ｐ_（１０）（Ｃ_（２ｖ）＋２Ｐ_２→Ｐ１４（Ｃ_（２ｖ））（Ⅱ）（Ｃ），利用从头算Ｇａｕｓｓｉａｎ－９４程序，选择６－３１Ｇ基组，对４种结构单元及Ｐ_（１４）原子簇的３种几何构型Ｃｓ、Ｃ_（２ｖ）（Ⅰ）、Ｃ_（２ｖ）（Ⅱ）进行全优化。相对能量的计算结果表明，Ｐ_（１４）（Ｃ_ｓ）与Ｐ_（１４）（Ｃ_（２ｖ））（Ⅰ）构型稳定。进一步设计（７／２）Ｐ_４（Ｔ_ｄ）→Ｐ_（１４）（Ｄ）及７Ｐ_２→Ｐ_（１４）（Ｅ），其相对能量表明，Ｐ_（１４）（Ｃ_ｓ）构型是稳定的．磷与磷连结单键键长范围为０．２２０～０．２２８ｎｍ，双键键长范围为０．２００～０．２０２ｎｍ，与实验结果大体相当。     

2-多氟烷基取代和葡萄糖基取代的2,4-二氢-1,2,4-三唑-3-硫酮类席夫碱的合成及其杀虫活性

为改善三唑类化合物的生物活性,以5-苯基-4-氨基-1,2,4-三唑-3-硫酮为原料,将其与芳香醛在冰醋酸体系中反应,得到5-苯基-4-芳基亚甲氨基-1,2,4-三唑-3-硫酮类席夫碱(4a～4i).在此基础上,化合物4a～4i分别与多氟烷基碘代烷和溴代乙酰基葡萄糖反应合成了一系列2,4-二氢-1,2,4-三唑-3-硫酮类席夫碱的多氟烷基取代物5a～5r和葡萄糖基取代物6a～6d,并用1H NMR,19F NMR,IR和MS谱以及元素分析表征了它们的结构.初步生物活性测试结果表明,部分目标化合物具有明显的杀虫活性.     

Recent advances in radical-mediated [2+2+m] annulation of 1,n-enynes

1,n-Enynes are a versatile class of unsaturated hydrocarbons that found broad applications in the synthetic community of natural products, biologically active structures and functional materials. Typical methods for the transformations of 1,n-enynes include the radical-mediated [2+2+m] annulation reaction as they are particularly efficient accesses to functionalized polycyclic compounds. We herein highlighted recent process in the radical-mediated [2+2+m] annulation of 1,n-enynes, including [2+2+1] and[2+2+2] modes, for the construction of five-to six-membered-ring-fused polycyclic scaffolds. Meanwhile, the mechanisms for these transformations were described.     

基于层间相似性的时序网络节点重要性研究

时序网络可以更加准确地描述节点之间的交互顺序和交互关系.结合多层耦合网络分析法,本文提出了基于节点层间相似性的超邻接矩阵时序网络节点重要性识别方法,与经典的认为所有层间关系为常数不同,层间关系用节点的邻居拓扑重叠系数进行度量.Workspace和Enrons数据集上的结果显示:相比经典的方法,使用该方法得到的Kendall’sτ值在各时间层上的平均提高,最高为17.72%和12.44%,结果表明层间相似性的度量对于时序网络的节点重要性度量具有十分重要的意义.     

1,1,3,3-四(全氟己基乙基)二锡氧烷二聚体在环氧化合物开环反应中的催化作用

采用氟碳-有机溶剂两相催化体系,考察了1,1,3,3-四(全氟己基乙基)二锡氧烷二聚体(1)在环氧化合物开环反应中的催化作用.结果表明,催化剂(1)在氟碳-有机溶剂两相体系中使环氧苯乙烯和甲醇的开环反应产率高达95%,¹³CNMR谱表明,开环反应的区域选择性为100%.在氟碳-有机溶剂两相催化体系中以一锅法制备了3-苯基丙酸2-甲氧基-2-苯乙醇酯,收率高,方法简便,催化剂几乎可以定量回收循环使用.     

P32（Oh）原子簇的电子结构

利用量子化学从头算方法研究了具有Ｏｈ对称性的笼状Ｐ３２原子簇的电子结构，对比具有相同结构的Ｃ３２，发现Ｐ３２（Ｏｈ）原子簇化学热力学稳定性差，而动力学性质稳定，其ＬＵＭＯ能量为负值，是好的电子受体。     

Stereochemistry of chiral pentacoordinate spirophosphoranes correlated with solid-state circular dichroism and 1H NMR spectroscopy

Two sets of diastereomers of pentacoordinate spirophosphoranes separately derived from l-valine (or d-valine) and l-leucine (or d-leucine) were synthesized, isolated, and structurally characterized both in the solid state (X-ray crystallography and solid-state CD spectroscopy) and in the solution (¹H NMR). The Λ and Δ absolute configurations of a pair of enantiomers 3a and 4a with distorted trigonal bipyramids (TBPs) geometry are directly determined by X-ray diffraction analysis, respectively. The chiral-at-phosphorus features of the related diastereomers were correlated with their solid-state CD and ¹H NMR spectra.