三维氮掺杂碳纳米带的制备及其在锂硫电池中的应用

锂硫电池凭借其高的理论能量密度（2600 W·h·kg^-1）、丰富廉价的材料来源、且对环境友好等优势,而引起了人们的广泛关注.然而,锂硫电池活性物质导电性差、多硫化物易溶于有机电解液等问题所导致的硫正极倍率性能和循环稳定性差,仍然是困扰锂硫电池发展的挑战性难题.我们设计并以廉价易得的小分子化合物对苯二酚和甲醛为原料,通过缩聚反应、与氧化石墨烯原位复合、高温氮化制备了一类新型氮掺杂的碳纳米带固硫载体材料（NCNB-NG）.通过NCNB-NG复合纳米硫进一步得到的碳-硫复合正极材料（S@NCNB-NG）表现出更优异的倍率性能和循环稳定性,这主要得益于该碳质载体独特的微结构以及改善的导电性.     

靶向新药吉非替尼的核磁共振波谱研究

应用1D、2D NMR实验技术（¹H NMR、¹³C NMR、DEPT、¹H-¹H COSY、¹H-¹³C HMQC、¹H-¹³C HMBC等）研究了靶向新药吉非替尼的结构,对其1H NMR和¹³C NMR谱峰作了全归属,并讨论了F原子对吉非替尼的¹H、¹³C NMR的影响.     

茚基镍的卤化物/四苯硼钠/三苯基膦体系催化苯乙烯聚合

The catalytic activity of a series of indenylnickel（Ⅱ） halides： （1-R-Ind）Ni（PPh3）X （R=ethyl, cyclopentyl and benzyl, while X=Cl, Br and I）, towards styrene polymerization was studied in the presence of NaBPh4 and PPh3. The catalytic property of these halides was related to the substituent group on the indenyl ligand and the halogen atom bonded to the metal atom. Among them, the （1-Et-Ind）Ni（PPh3）Cl/NaBPha/PPh3 system showed the highest activity for the polymerization of styrene, and the polystyrene obtained was a syndio-rich （rr triad） atactic polymer with Mn values in the range of 103--104. The mechanism of the styrene polymerization initiated by the （1-Et-Ind）Ni（PPh3）Cl/NaBPha/PPh3 system was studied.     

Universal memory based on phase-change materials: From phase-change random access memory to optoelectronic hybrid storage

The era of information explosion is coming and information need to be continuously stored and randomly accessed over long-term periods, which constitute an insurmountable challenge for existing data centers. At present, computing devices use the von Neumann architecture with separate computing and memory units, which exposes the shortcomings of “memory bottleneck”. Nonvolatile memristor can realize data storage and in-memory computing at the same time and promises to overcome this bottleneck. Phase-change random access memory (PCRAM) is called one of the best solutions for next generation non-volatile memory. Due to its high speed, good data retention, high density, low power consumption, PCRAM has the broad commercial prospects in the in-memory computing application. In this review, the research progress of phase-change materials and device structures for PCRAM, as well as the most critical performances for a universal memory, such as speed, capacity, and power consumption, are reviewed. By comparing the advantages and disadvantages of phase-change optical disk and PCRAM, a new concept of optoelectronic hybrid storage based on phase-change material is proposed. Furthermore, its feasibility to replace existing memory technologies as a universal memory is also discussed as well.     

金属配位化合物在生物分析、成像以及染色方面的应用

由于优越的光物理和光化学特性,很多金属配合物长期以来被用于生物传感器、生物探针和医学诊断等领域。本文综述了近年来已经或有望成功应用于生命科学基础研究和临床医学诊断众多领域中的多种金属配位化合物,包括几种在成功商业化的体外诊断系统中作为分子探针、生物标记物或蛋白染色剂而广泛应用的金属钌配位化合物和稀土金属配位化合物,在核磁共振成像技术中作为造影剂或影像增强剂的系列金属钆配位化合物,以及在细胞成像、生物标记和蛋白质分析应用中极具商业化应用前景的一些新型环金属铱配位化合物等。此外,本文还对金属配合物结合纳米结构及技术在生物医学领域中的应用作了简单介绍和展望。