邻香草醛缩氨基酸钾Schiff碱及其三苄基锡(Ⅳ)配合物的合成与表征

有机锡配合物具有明显的抗肿瘤活性,已引起化学工作者的研究兴趣［１］。鉴于三苄基氯化铝（Ⅳ）是一种原料易得、易合成、毒性小的有机锡化合物;邻香草醛缩氨基酸钾Ｓｃｈｉｆｆ碱是一类具有重要意义的生物活性配体,两者形成的配合物,有可能表现更典型的生物活性。某些邻香草醛缩氨基酸Ｓｃｈｉｆｆ碱与过渡金属形成的配合物已有报道［２,３］,但邻香草醛缩氨基酸钾Ｓｃｈｉｆｆ碱及其三苄基锡（Ⅳ）配合物尚未见报道,因此,本文合成六种邻香草醛缩氨基酸钾Ｓｃｈｉｆｆ碱及其配合物,通过元素分析、ＩＲ、ＵＶ、１ＨＮＭＲ等物理化…     

复杂系统的一般数学框架(Ⅰ)

复杂系统的基本和最简单的结构就是网络.根据这一思想,本系列论文拟发展一套处理复杂系统的新数学框架.本文详细论述了系统的概念、一般描述方法:系统=(硬部,软部,环境)和局整关系,包括子系统、元素与系统的关系和系统与系统的关系;给出了系统运算的基本法则;简要论述了系统的软、硬部之间的诱导转化.     

Pansystems clustering analysis of complex systems

In this paper, by use of equivalence operators δ_i and semi-equivalence operators ε_i we study the clustering problems of complex systems, present δ_i(1,3) disconnection principle,dual transformation principle and large-scale systems decomposition principle for analizing and operating complex systems, discuss interconnectivity and disconnectivity of complex systems in detail and present some related theorems. Finally, we discuss the levels of systems according to pansystems, clustering approach proposed in this paper.     

One-dimensional core–shell motif nanowires with chemically-bonded transition metal sulfide-carbon heterostructures for efficient sodium-ion storage

Herein, a chemical-vapor deposition-like strategy was developed for the synthesis of versatile core–shell transition metal sulfide (TMS)@carbon nanowires with chemically-bonded heterostructures and significantly improved electrochemical performance. The morphological evolution observations revealed the simultaneous growth of TMS nanowires and their bonding with an ultrathin carbon layer. The resulting core–shell heterostructured nanowires possessed notable advantages, including fast ion/electron diffusion rates, improved conductivity, and chemical/mechanical stability, thereby leading to remarkable reversible capacity, rate capability, and cycling stability for Na-ion storage applications. The in situ transmission electron microscopy and in situ X-ray diffraction studies for FeS@C demonstrated the crystalline phase evolution between hexagonal and tetragonal FeS species during the electrochemical charging/discharging process, clearly indicating the excellent Na-ion storage performance of FeS@C nanowires. This work provides a new methodology for achieving 1D core–shell nanoarchitectures, while elucidating the electrochemical reaction mechanism underlying Na-ion storage in TMS materials.

A chemical-vapor deposition-like strategy was developed for the synthesis of versatile core–shell transition metal sulfide (TMS)@carbon heterostructured nanowires for electrochemical sodium ion storage.     

锂负极失效的全固态薄膜锂电池的直接回收再利用

作为微电子器件的理想电源，全固态薄膜锂电池(TFB)已经被广泛地研究了几十年，并开始进入商业化应用。然而，目前关于失效TFB的回收与再利用的研究几乎没有，这将会阻碍TFB的可持续发展。本工作针对因金属锂负极失效而造成电池失效的TFB，提出了一种简单的基于最常见LiCoO₂ (LCO)/LiPON/Li TFB (F-TFB)的直接回收再利用的方法。研究发现，F-TFB中的金属锂负极薄膜在循环过程会被部分氧化从而造成电池失效。我们提出利用无水乙醇溶液有效地溶解并去除F-TFB上失效的金属锂负极部分，从而快速地回收底层的LCO/LiPON薄膜。结构分析和表面分析结果表明，回收的LCO/LiPON薄膜中的LCO正极的晶体结构、LCO/LiPON的界面结构以及LiPON电解质的表面保持完好，使其再利用成为了可能。进一步地，我们在回收的LCO/LiPON薄膜上依次沉积了LiPON和Li薄膜，构建得到了电化学性能恢复的LCO/LiPON/Li TFB，并获得了与新制备的TFB相一致的比容量(0.223 mAh∙cm⁻²)、良好的倍率性能和循环寿命(500次循环后容量保持率为77.3%)。这种简单而有效的回收再利用方法有望延长固态电池的使用寿命，减少能源和资源消耗，促进固态电池的可持续发展。     

X-ray Molecular and Crystal Structure Study of the Fe(II) Complex Containing 1,10-Phenanthroline and Saccharin: [Fe(C12H8N2)3] (C6H4COSO2N)2 · 4 H2O

X-ray molecular and crystal structure of the [Fe(C₁₂H₈N₂)₃] (C₆H₄COSO₂N)₂ · 4 H₂O is reported. In the complex, the Fe atom is bonded to the six nitrogen atoms with a distorted octahedral stereochemistry.