水相中对羟基苯甲酸分子印迹聚合物的制备及异构体识别

以对羟基苯甲酸为模板分子,2-乙烯基吡啶为功能单体,在甲醇-水体系中制备了以对羟基苯甲酸为模板的分子印迹聚合物。通过高效液相色谱评价,该固定相对对羟基苯甲酸及其异构体分离效果良好。     

单体3,5-二(4-叠氮丁氧基)苯甲酸甲酯的合成与表征

目的：单体分子3,5-二（4-叠氮基丁基）苯甲酸甲酯的合成与表征。方法：采用3,5-二羟基苯甲酸甲酯与叠氮化钠发生亲核取代反应及与卤代烷发生“Williamson”醚化反应,从而形成合成单体分子,该分子叫做3,5-二（4-叠氮基丁基）苯甲酸甲酯。通过1H NMR和FTIR对合成单体进行结构表征。结果：在大量的1,4-二溴丁烷中添加3,5-二羟基苯甲酸甲酯的DMF溶液,反应48个小时后,得到产物3,5-二(4-叠氮丁氧基)苯甲酸甲酯和3,5-二(4-溴丁氧基)苯甲酸甲酯。结论：3,5-二羟基苯甲酸甲酯与叠氮化钠发生亲核取代反应及与卤代烷发生“Williamson”醚化反应,能够形成3,5-二（4-叠氮基丁基）苯甲酸甲酯。     

配合物Na2（4—apyH）2[CoCl2（H2O）4·（tp）2]的合成及晶体结构

为了研究过渡金属借助氢键引导的自组装,合成了线性刚性配体对二苯甲酸与钴(Ⅱ)、4-氨基吡啶和水的配合物Na     

海洋真菌K26号代谢产物的研究

从南海真菌K26号中共分离得到8个化合物,其中硫酸酯胆碱和3,4,5-三羟基苯甲酸首次从中国南海海洋真菌中分离得到．它们的结构通过IR,FABMS,NMR及2DNMR得到确定．     

一种合成3,5-二(吡啶-4-甲氧基)苯甲酸的新方法

以3,5-二羟基苯甲酸乙酯为原料,在一定的条件下与4-氯甲基吡啶盐酸盐反应,合成3,5-二(吡啶-4-甲氧基)苯甲酸.研究发现,当使用N,N-二甲基甲酰胺(DMF)作为反应溶剂时,目标产物的产率可达到65%.同时,通过傅立叶变换红外光谱(FT-IR)、核磁共振氢谱(1H NMR)等技术手段对目标产物3,5-二(吡啶-4-甲氧基)苯甲酸的结构进行表征.     

柱芳烃单分子管人工通道构筑及其对手性氨基酸的选择性跨膜输送

该课题通过设计结构精确的分子单体,通过氢键、配位作用及疏溶剂作用和pi-pi堆积作用等为驱动力,构筑多层次的自组装体系,进而探索组装体的功能。2013年度,我们根据计划书要求开展工作,在以下几个方面取得重要进展:(1)设计了一类三角型平面分子,在其周围引入单N-苯基联二吡啶VB+,通过葫芦脲[8]对两个VB单元的强络合作用,在水相中实现了有序蜂窝型超分子有机框架(SOF)结构的自组装。(2)设计了两类刚性四面体分子,分别引入4个紫精和四硫富瓦烯片段,在把紫精还原或把四硫富瓦烯氧化为正离子自由基后,这两类正离子自由基在水相强烈堆积,从而诱导其形成三维网络超分子组装结构。(3)利用氢键控制芳香酰胺线性分子的构象,从而研究其结构-性质关系,并进而利用构象控制开展分子识别与自组装研究。1利用单分子力谱首次研究了驱动形成芳香酰胺螺旋孔状结构的氢键的强度及不同位置氢键强度的差异;2利用手性离子对识别,从并入氢键折叠片段的UPy四氢键组装单体构筑了一类交替堆积的手性超分子聚合物;3设计合成了两个大环分子,引入酰胺和1,2,3-三氮唑片段,通过对二酰胺和三碘客体分子的氢键和卤键结合,研究了分子间氢键和卤键的相对强度;4设计了新的双卟啉和三卟啉主体分子,通过分子内氢键诱导其形成刚性梳型构象,进而用于研究配位作用和堆积作用协同诱导的多组分超分子结构组装。(4)在配位自组装研究方面取得重要进展:1研究了含有氮杂环卡宾-金属键的金属有机大环分子的合成,发现氮杂环卡宾与11族金属(Cu,Ag,Au)可以形成较强的配位键,由此获得了中间桥连基团是不同长度、含有不同吡啶数目的系列金属有机大环分子;2对含有多配位位点的氮杂杯吡啶大环分子进行配位组装及金属簇可控合成的机理进行了深入研究。发现含有多个配位位点的氮杂杯吡啶大环分子可以结合多个金属离子,形成一个分立的组装结构,并且一种大环分子与某种特定金属形成的复合物结构具有很好的稳定性,金属与配体的比例较为固定。(5)利用柱芳烃为骨架,构筑了一类新的自组装单分子纳米管,通过引入由苯丙氨酸构成的肽链,延长了单管长度并引入手性,从而实现了对氨基酸跨膜输送的手性选择性。     

偶氮基团修饰的苝酰亚胺染料的合成及其光响应行为

以3,5二羟基苯甲醇为原料,经醚化、溴代反应得到3,5二（十二烷氧基）苄基溴,然后与4羟基4′硝基偶氮苯反应,再还原得到含氨基的偶氮化合物6,最后与3,4;9,10苝四甲酸二酐缩合得到新型偶氮-苝酰亚胺二元染料7。考察了紫外光光照时间及浓度等因素对偶氮-苝酰亚胺二元染料光学性能的影响,结果表明浓度越大,偶氮生色团由反式结构向顺式结构的转变速度越慢;对相转移法组装形成的聚集体形貌结构的研究表明,当甲醇与三氯甲烷体积比为7∶1或5∶1时,更易形成较规整的短棒;比较研究紫外光光照和未光照下快速溶剂扩散法组装形成的聚集体形貌结构发现,光照下制备的聚集体结构的规整性不及未光照下制备的;吸收光谱表明在光照下组装的聚集体分子间π*π堆积作用更弱,这是由于偶氮基团由反式结构向顺式结构的转变导致分子空间几何构型的变化,破坏了分子堆积的有序性,不利于低维功能材料的形成。     

沙丁胺醇与不同功能单体分子的印迹作用

采用密度泛函理论(DFT)的LC-WPBE方法,以沙丁胺醇(SAL)为模板分子,甲基丙烯酸(MAA)、丙烯酰胺(AM)和4-乙烯基吡啶(4-VP)为单一功能单体,MAA和AM为混合功能单体,模拟SAL与单一功能单体和混合功能单体分子印迹聚合物(MIPs)自组装体系的构型,并讨论其稳定复合物的成键作用位点及数目、自然键轨道(NBO)电荷的转移、结合能及溶剂化能,以及SAL与功能单体间相互作用的原理.计算结果表明,SAL与功能单体间均通过氢键形成分子结构互补的有序排列复合物,单体中MAA与SAL模板分子间的相互作用更强,且在印迹比例为1∶4,以乙腈(ACN)为溶剂时,复合物能量最低,电荷的转移趋势最大.基于计算结果,采用沉淀聚合法制备不同印迹比例沙丁胺醇分子印迹聚合物(SAL-MIPs),结果表明,印迹比例1∶4时制备的聚合物吸附量最大,实验结果与计算结果相符.     

非布索坦的合成工艺改进

以4-羟基硫代苯甲酰胺为原料制备出高纯度的非布索坦.通过优化工艺条件得到最佳合成方案.方法以4-羟基硫代苯甲酰胺为原料,经环合、甲酰化、醚化、醛肟化后脱水得到腈类化合物,该化合物再经过酯水解、酸化反应得到目标产物,最后经过重结晶得到合格的产品.结果最终产品的结构经核磁共振分析得到确证.经重结晶后其纯度可达99.7%,产品总收率为48.8%.结论原料廉价易得、合成条件温和,适合工业化生产.     

含氟聚氨酯大分子单体自组装薄膜的制备及摩擦性能

用己二酸和乙二醇在一定的条件下通过酯化和缩聚两步反应合成聚己二酸乙二醇酯（PEA）,测所得聚酯二元醇的酸酯（Av）和羟值（Qv）,得到合成聚氨酯大分子单体的原料.聚己二酸乙二醇酯（PEA）与等量的甲苯-2,4-二异氰酸酯（TDI-100）反应,加入十三氟-1-辛醇封端,得到含氟聚氨酯大分子单体（FPUOH）.利用分子自组装技术在玻璃基片表面制备含氟聚氨酯薄膜,对其进行结构表征和性能测试.亲水性测试结果表明,自组装薄膜与水的接触角为76.8°,证明了自组装薄膜制备的成功.微摩擦测试结果表明,含氟聚氨酯大分子自组装薄膜修饰的基底具有很好的减摩润滑效果,当载荷为400mN时,自组装薄膜的稳定摩擦系数达到0.09,适合作为轻载荷下的润滑防护保护膜.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.