澳洲茄胺单糖苷的合成及其抗肿瘤活性

以单糖为原料,经苯甲酰化保护和溴代制备中间体酰化溴代糖(3a～3e)。通过Koenigs-Knorr合成法将3a～3e与澳洲茄胺甙化缩合并脱保护合成了5个澳洲茄胺单糖苷化合物(5a～5e,5d和5e为新化合物),其结构经1H NMR,13C NMR和MS表征。用MTT法对5a～5e进行体外抗肿瘤细胞活性试验结果表明,5c和5d显示了较好的抗肿瘤活性。     

基于侧链不对称喹喔啉聚合物的高效非富勒烯太阳电池

喹喔啉衍生物由于合成简单,易功能化,成本较低等特点在众多领域都有广泛应用。其自身具有平面刚性结构,也是构建光电聚合物的重要单体。基于喹喔啉单元的有机分子化学结构和电子结构可修饰性强,通过骨架、侧链和取代基等修饰,易于调控分子的能级和吸光光谱,因此,当使用喹喔啉体系的共轭给体与球形富勒烯受体(如PCBM)及弱结晶性非富勒烯受体(如ITIC)均可表现出优异的光伏性能。在本工作中,基于结晶性较强的非富勒烯受体(o-IDTBR),我们首次制备出侧链不对称喹喔啉(简称：不对称喹喔啉)基聚合物(TPQ-1)与之匹配。相比于侧链对称性喹喔啉(简称：对称喹喔啉)(HFQx-T)与o-IDTBR组合,“弱结晶给体-强结晶受体”组合能表现出更佳均匀的相分离尺度,从而获得更高的短路电流及能量转换效率。TPQ-1与o-IDTBR共混后器件效率为8.6%,加入15%的TB7-Th后,器件效率达到9.6%。     

Study of the stability of polarization mode dispersion in fibre

Polarization mode dispersion (PMD) is the ultimate limitation to high bit-rate fibre communication system. The stability of PMD is very important to its measurement and compensation. This paper puts forward a method to measure the stability of PMD by measuring the stability of the state of polarization (SOP) and introduces the conception of time evolution vector (TEV) of SOP. We observe the fact that the regularity of the principal state of polarization changing with time is the same as other SOPs‘‘, if we neglect the dependence of TEV on wavelength. We also measure the SOP‘‘s stability of some fibres with different lengths, and obtain results of PMD changing with time.     

固液界面双电荷层结构的一个界面势模型

当液体受限在纳米尺度下时,会呈现出跟宏观尺度下完全不同的输运性质。这些新的性质可以被应用于很多领域,譬如对生物体中体液输运的研究,液体抽运,药物的混合和分离,以及离子和胶体颗粒的选择等领域。为了充分利用这些新性质,需要对纳米液体中最基本的双电荷层结构有深刻认识。文章回顾了传统的泊松—玻尔兹曼方程对双电荷层结构中液体离子分布的计算,指出了其中的不足,并提出一种基于液体电荷保持中性的固液表面势模型。     

中国陆相油气的形成和运移(Ⅱ)

本文(Ⅰ)着重研究了中国陆相湖盆沉积物中有机质向油气演化的过程.本文(Ⅱ)阐明了现代青海湖沉积物埋藏初期及早期成岩作用过程中有机质的演化特征.其结果表明陆相有机质大量开始向石油转化的深度随不同地区、不同时代、不同类型的有机质而异.最后,运用特征有机化合物、稀有气体同位素等资料,结合构造发展史阐述我国陆相油气运移的类型、规模和途径.指出近油源短距离是陆相油气运移的基本特征.     

基于半导体光放大器瞬态交叉相位调制效应的高速反相和同相波长转换的研究

采用半导体光放大器(SOA)中的瞬态交叉相位调制效应是实现高速全光信号处理的有效途径.利用SOA和带宽为0.4 nm的窄带滤波器同时实现了重复频率为10 GHz、脉冲宽度为10 ps的同相和反相全光波长转换.当滤波器的中心波长相对于探测光载波波长蓝移0.25 nm或者红移0.05 nm时，得到反相波长转换；当滤波器的中心波长相对于探测光波长蓝移0.29 nm或者红移0.25 nm时，得到同相的波长转换.同时用数值模拟了从同相到反相波长转换的极性演化过程，理论分析和实验结果基本相符. 关键词： 半导体光放大器 波长转换 瞬态交叉相位调制     

A New Model for the Genesis of Natural Gases--Multi-source Overlap, Multi-stage Continuity, Type Controlled by Main Source and Nomenclature by Main Stage (Ⅰ)--Multi-source Overlap and Type Controlled by Main Source

Based on the geochemical studies of natural gases in the past ten years in China, the authors have proposed a new model for their genesis--multi-source overlap, multi-stage continuity, main source-controlling type and nomenclature by the main stage.Multi-source refers to a diversity of material sources involved in the formation of natural gases, including abiogenic and biogenic material sources. In regard to biogenic sources, either oil-generating or coal-generating organic matter would produce gaseous hydrocarbon reservoirs of commercial importance. Generally, natural gases originating from these sources can overlap to form gas reservoirs. Under specific circumstances mantle-source abiogenic gases could overlap biogenic gases to form gas reservoirs. In nature, natural gases predominated by gaseous hydrocarbons may be formed from a single end-member source. However, multi-source overlap is more typical of the genesis of natural gases.     

NATURAL GAS OF NEW GENETIC TYPE——BIO-, THERMO-CATALYTIC TRANSITIONAL ZONE GAS

Bio-, thermo-catalytic transitional zone gas (BTCTZ gas), of which burial depth is shallow (1000-2500m), chemical composition (C,/ΣC1-5 = 0.7-0.9) and isotopic composition (δ13C1= -55 to-48‰) coincide with the evolution level of organic matter (R0=0.25-0.6%) in the corresponding strata, is a natural gas of new genetic type. The genesis of BTCTZ gas must have some relation to microcatalysis under lower temperature and condensation of aromatic hydrocarbons. In line with the new theory of natural gas formation, the existence of BTCTZ gas is objective. According to data from all over the world, BTCTZ gas may hold an important position in the table of reserves of natural gas.     

轻烃中碳、氢同位素组成特征

本文收集了我国10个含油气区46个凝析油、轻质油样品,进行了全烃和部分饱和烃的碳、氢同位素分析,结合各地区地质背景,讨论了成气母质和沉积环境。从全油和饱和烃碳、氢同位素组成特征看,与煤系有关的凝析油常富集~(13)C,与Ⅰ,Ⅱ型母质(生油岩系)相关的凝析油则富集~(13)C。总体而言,碳同位素组成主要与母质的同位素继承效应相关,而氢同位素组成的变化则主要反映与沉积环境及水介质盐度的相关性。基于现有资料,提出δD值小于-150‰者为淡水-微咸水;大于-150‰者为半咸水-海水环境。研究表明,沉积相控制了有机母质,而不同有机母质又显示出稳定同位素组成的差异。     

煤的热解动力学研究

热解是煤燃烧、气化和液化等热加工工艺中的基本过程之一,也是成煤过程中的基本环节。因此,研究煤的热解不仅为煤的热加工过程提供科学依据,也能为加深煤化学研究提供重要信息。溶剂抽提既是研究煤化学的重要方法,也是提取某些重要化工原料和燃料油的的重要加工过程,同时还可为抽余煤的合理利用提供必要的基础数据。