CTAB水溶液表面的吸附动力学

用最大气泡压力法测定了十六烷基三甲基溴化铵(CTAB)水溶液的动态表面张力,研究了CTAB水溶液表面吸附的动力学及其影响因素。结果表明,吸附过程由初始的扩散控制经混合控制过渡到势垒控制。扩散控制吸附速率快,时间短;势垒控制速率慢,时间长,吸附势垒一般为4～10kJ.mol^-^1。温度升高,动态表面张力减小,但吸附机理不变;无机盐或醇类的加入对势垒值影响不大,但对扩散控制步骤的影响较大。     

液晶聚合物的单层与Langmuir-Blodgett膜

系统研究了手性液晶聚硅氧烷和光致变色液晶聚硅氧烷两个毓的侧链液晶聚合物在空气/水界面的单层行为和Langmuir-Blodgett(LB)膜沉积特性,对LB膜结构与存在的聚集现象进行了系统的表征,并初步探讨了LB膜中液晶聚合物表现的功能性。     

二氯-二[2-甲氧基-6-(2'-羟乙基亚胺基甲基)苯酚]合镉(II)的 结构再研究

标题化合物的晶体结构曾用单斜晶系的空间群Cc描述。我们再研究确定其空间群应为正交晶系的Fdd2。修正涉及晶体的晶系、晶类和布拉维格子类型的改变,但仍属可呈现非线性光学活性的非心对称空间群。给出了在空间群Fdd2时的非氢原子坐标和主要键长和键角值。     

Extermal solutions of terminal value problems for nonlinear impulsive integro-differential equations in Banach spaces

Abstract. The comparison principle is first established ,and then the lower and upper solutionmethod and the monotone iterative technique are employed to the study of terminal value prob-lems for the first order nonlinear impulsive integro-differential equations in Banach spaces. Fi-nally ,the existence theorem on the maximal and minimal solutions is obtained.     

EXTREMAL SOLUTIONS OF TERMINAL VALUE PROBLEMS FOR NONLINEAR IMPULSIVE INTEGRO-DIFFERENTIAL EQUATIONS IN BANACH SPACES

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四元数广义奇异值分解及其应用

This paper derives a theorem of generalized singular value decomposition of quaternion matrices(QGSVD),studies the solution of general quaternion matrix equation AXB-CYD=E,and obtains quaternionic Roth's theorem.This paper also suggestssufficient and necessary conditions for the existence and uniqueness of solutions and explicit forms of the solutions of the equation.     

稀土(III)-冠醚配位反应的热力学性质: II. 镧系(III)高氯酸 盐与二苯并18- 冠-6在无水乙腈中配位反应的量热滴定研究

用滴定量热计于298.15K测定了除钷、镥以外的全部十三种镧系(III)高氯酸盐与二苯并-18-冠-6在无水乙腈中的配位作用。借助计算机用自编程序算出了配位反应的生成常数和焓变,进而算出了配位反应的自由能变化和熵变化。探讨了镧系(III)阳离子对配位反应的影响。此外,还比较了几种不同冠醚与高氯酸镧在无水乙腈中配位反应的热力学性质。     

Structurally Stable Ni(OH)2 Composite with Super Long-term Cycling Life for Aqueous High-performance Supercapacitor

We synthesized an electrochemical structurally stable composite electrode, containing Ni-doped Co(CO₃)_0.5OH ⋅ 0.11H₂O nanoneedles and nanoflake-/nanofrustum-like Ni(OH)₂ with highly hydrophilic group, leading to enhanced rare performance. The electrode exhibits an outstanding ultra-long cycle life of more than 140,000 cycles. Specially, the assembled aqueous hybrid supercapacitor presents more than 80 % capacity retention even after 170,000 cycles and high energy density of 44.5 Wh kg⁻¹. This work highlights a feasible strategy to design and develop high-efficiency electrodes via engineering on composition and nanostructure.