有机-无机杂化材料[Na2(H2O)4]2[γ-Mo8O26·(Gly-Gly)2]·4H2O的合成及晶体结构

多金属氧酸盐因其独特的结构而具有较高的抗肿瘤及抗病毒活性,蛋白质和肽是氨基酸的聚合体,氨基酸侧链官能团能与多金属氧酸盐形成新型配合物.了解氨基酸和肽与多金属氧酸盐的相互作用对于深入研究多金属氧酸盐抗肿瘤及抗病毒机理很有意义.我们曾报道了赖氨酸、丙氨酸及甘氨酸二肽与钼磷酸所形成化合物的晶体结构.     

新型笼状同多钒酸盐[Ni(1,10′-phen)_3]_2·[V_2~ⅣV_8~ⅤO_(26)]的水热合成和晶体结构

尽管多金属氧酸盐 (POMs)的研究已有 1 80多年的历史 ,但大量的 POMs结构在最近几十年才被陆续解析出来 [1～ 4 ] .其中 ,同多钒酸盐由于钒配位几何形状的多样性 ,结构最为丰富 ,例如 :[V4 O12 ]4- [5] ,[V5O14 ]3 - [6] ,[V10 O2 8]6- [7] ,[V15O4 2 ]9- [8] ,[V13 O3 4 ]3 - [9] .值得注意的是 ,在这些化合物中 ,钒的化合价均处于最高氧化态 +5价 .由于 +4价钒不易在溶液中 (尤其是水中 )稳定存在 ,因此在以往的常压溶液合成中具有混合价态的同多钒酸盐报道很少 .与饱和价态的同多钒酸盐相比 ,混价多钒酸盐具有更为新奇的电荷分布…     

双烃链表面活性剂的聚集行为及其应用

介绍了双烃链表面活性剂的基本性质、分类及其在纳米材料和生命科学等领域的某些应用, 并以二(2-乙基己基)琥珀酸酯磺酸钠(AOT)和二(2-乙基己基)磷酸钠(NaDEHP)为例, 介绍了二者的相行为, 反胶束的形成、性质等的差异, 并结合自己的工作探讨了二者与大分子的相互作用.     

有机三氟硼酸钾参与的Suzuki偶联反应研究进展

Suzuki偶联反应是构筑碳-碳单键的重要方法之一。 继有机硼酸后,有机三氟硼酸盐成为一种理想的、具有研究意义和使用价值的有机硼亲核试剂。 本文系统地综述了有机三氟硼酸钾参与的Suzuki偶联反应研究进展并对其研究前景进行了展望。     

微通道冷却器内流动和传热特性的数值模拟

为满足固体激光器用微通道冷却器的换热要求, 根据冷却器结构分别建立了二维和三维物理模型, 利用计算流体力学方法首先对比研究两者的流动特性, 然后考察雷诺数和玻片生热量对微通道流动和传热特性的影响。结果表明：对于类似大平板间的矩形微通道层流流动区域, 其流动及传热特性可直接采用二维简化模型进行模拟分析;对于重点关注的转捩区, 采用三维模型模拟分析更好;当雷诺数增大到转捩点, 流体的传热效果得到明显增强;随着雷诺数的增大, 玻片生热量对通道内最低压力需求的影响逐渐减小;不同玻片生热量对微通道流动影响不可忽略, 对努赛尔数和通道总压降基本无影响。     

Anode optimization strategies for aqueous zinc-ion batteries

Zinc-ion batteries (ZIBs) have received much research attention due to their advantages of safety, non-toxicity, simple manufacture, and element abundance. Nevertheless, serious problems still remain for their anodes, such as dendrite development, corrosion, passivation, and the parasitic hydrogen evolution reaction due to their unique aqueous electrolyte system constituting the main issues that must be addressed, which are blocking the further advancement of anodes for Zn-ion batteries. Herein, we conduct an in-depth analysis of the problems that exist for the zinc anode, summarize the main failure types and mechanisms of the zinc anode, and review the main modification strategies for the anode from the three aspects of the electrolyte, anode surface, and anode host. Furthermore, we also shed light on further modification and optimization strategies for the zinc anode, which provide directions for the future development of anodes for zinc-ion batteries.

This review provides a comprehensive summary of the research progress of Zn anodes, including the main challenges of Zn metal anodes, the corresponding optimization strategies, and the perspectives for practical aqueous Zn-ion batteries.     

SnO2/石墨分级纳米异质结构的合成及其电化学性能研究

以石墨为基底,五水合四氯化锡为锡源,氢氧化钠为沉淀剂,采用一步水热法合成了SnO2/石墨分级纳米异质结构.利用FESEM、XRD、EDS、Raman等对SnO2/石墨分级纳米异质结构进行了形貌、结构和成分表征.研究发现,结晶良好的SnO2纳米线首先组装成SnO2纳米棒,纳米棒进一步组装成直径约450 nm的花状结构,并...     

有机染料共振光散射法测定蛋白质的研究进展

对用有机染料作试剂的共振光散射光谱法测定蛋白质研究的进展情况(主要包括1990年至2004年间)作了评述。对测定蛋白质的反应体系中有机染料作用的基本原理作了简要论述。文中涉及的有机染料主要有:三苯甲烷类、偶氮类、酞菁类及羟基蒽醌类等(引用文献58篇)。     

H型群上的非线性Liouville定理

对H型群上的次线性方程△Gu+up=0进行了研究,其中△G是对应的sublaplace算子.通过将移动平面方法推广到H型群上,证明了在一定条件下的p和函数u,次线性方程△Gu+up=0的唯一解是u≡0.     

Synthesis and characterization of photochemical sol鈥揼el derived lanthanum doped Bi4Ti3O12 film and its micro-patterns

A unique photochemical sol–gel route was employed to prepare La-doped Bi₄Ti₃O₁₂ film (BLT) using bismuth nitrate, lanthanum nitrate, and titanium tetra-n-butoxide as starting materials. Through complex reaction between benzoyl acetone and Ti⁴⁺ ions, the synthesized La-doped Bi₄Ti₃O₁₂ sol and gel films exhibited photosensitivity. Micro-patterned BLT film was obtained by a photoresist-free micro-patterning technique. The phase microstructures, electrical and ferroelectric properties of the as-prepared BLT film were characterized. By doping Lanthanum, the strong (00l)-oriented BT phase was transformed to randomly-oriented orthorhombic phase, resulting in the enhanced remanent polarization and improved fatigue properties. The obtained BLT film showed good ferroelectric properties with a long fatigue cycles over 10¹⁰ cycles.