某些N-芳基-(1′-羧甲基二茂铁基)乙酰胺的合成与表征

以二茂铁为起始原料,经多步反应,合成了1,1’-二茂铁二乙酸酐,后者与取代苯胺反应,合成了十四种新型二茂铁二乙酸单酰胺,并由元素分析、红外光谱和核磁共振氢谱鉴定了化合物的结构。此外,对二茂铁二羧酸单酰胺与过渡金属的螯合反应进行了初步研究。     

Synthesis and structure of a novel complex [LCo(OH)2(HCO3)CoL]2[(NC)5Cr(CN)Cr(CN)2].4H2O

A novel complex containing a (μ-bicarbonato)-bis(μ-hydroxo)dicobalt(II) cation and a (μ-cyano)dichromium(III) anion has been obtained and characterized by single crystal X-ray diffraction. The cations have a confacial bioctahedral structure and the anion contains an octahedral Cr(CN)₆³⁻ unit bridging to the second Cr which has trigomal planar geometry.     

Synthesis,spectral and magnetic properties of binuclear copper(II)/nickel(II) and copper(II) complexes bridged by glyoximate groups

Three new dinuclear complexes, [(tmen) (H2O)2Ni (Hdmg)(dmg)Cu]·ClO4, [(dien)(H2O)Ni (Hdmg)(dmg) Cu]·ClO4 and [(tmen)Cu(Hdmg)(dmg) Cu] ClO4·H2O (H2dmg=dimethylglyoxime, tmen=tetramethylene diamine), have been prepared. Variable-temperature- magnetic susceptibility measurements (75–300K) on the complexes reveal the presence of intramolecular antiferromagnetic interactions through the oximate bridges. The formation of mononuclear, dinuclear complexes has been confirmed by spectrophotometry.     

Norm inequalities related to operator monotone functions

Let A,B be positive semidefinite matrices and any unitarily invariant norm on the space of matrices. We show for any non-negative operator monotone function f(t) on , and for non-negative increasing function g(t) on with g(0) = 0 and , whose inverse function is operator monotone. Received: 1 February 1999     

RIBLL中的TOF测量

描述了一种为兰州放射性核束流线(AIBLL)研制的时间拾取装置.次级束引起闪烁薄膜发光,椭球面镜聚焦,光电倍增管读出,CAMACTDC记录次级束的飞行时间.其时间分辨可以达到140ps,计数率可以达到10⁸pps.     

无穷维L1空间至连续函数空间的等距逼近问题

证明了无穷维Ｌ~１空间至连续函数空间的等距逼近问题的回答是否定的．     

一类赋p范空间上的等距扩张问题

该文讨论了Ｌ~ｐ（Ω,Ｘ）（０＜ｐ＜１）的一类子空间上的单位球面等距扩张问题．     

完备非紧具非负曲率流形之拓扑结构

本文给出完备非紧具非负曲率的Ｒｉｅｍａｎｎ流形具有限拓扑型的一个简单证明     

激光二极管泵浦的再生放大器技术研究

 对高功率激光二极管泵浦的环形再生放大器进行了理论分析和数值模拟计算,并做了详细的实验研究。得了放大倍数约为10⁶、输出脉冲能量为0.35mJ、输出稳定性优于5.0%(峰值)的实验结果。     

Transport of nanodimers through chemical microchip

We propose a new microfluid chip for transporting micro and nano particles. The device consists of chemical stripe pathways full of fuel species, which can be realized in experiments by chemical surface reactions that form spatiotemporal patterns. A mesoscopic model is constructed to simulate the transport dynamics of nanodimers passing through the chip. It is found that the increases of the volume fraction and radius of the dimer both decrease the first reach time although the underlying mechanisms are different: the volume fraction affects the probability of touching and entering the chip while the radius determines the self-propulsion within the chip.The transport efficiency is influenced by the size of the particles.