硼酸功能化介孔纳米材料的制备及其对糖肽的富集研究

制备了一种硼酸功能化介孔纳米材料, 利用硼酸基团可以和糖肽中糖链上的顺式邻位或间位羟基发生反应形成环状二酯对糖肽进行富集, 考察并比较了不同的孵育时间、孵育缓冲液、清洗方式以及洗脱液对糖肽富集的影响, 优化了该材料富集糖肽的条件, 建立了一种硼酸功能化介孔纳米材料用于选择性富集糖肽并用基质辅助激光解吸附电离-四极离子阱-飞行时间质谱(MALDI-QIT-MS)进行糖肽分析的方法.     

组合化学在开发纳米材料以及纳米生物医学研究中的应用进展

组合化学是一种将计算机辅助设计、有机化学合成以及高通量筛选一体化的技术. 它以高效、微量、高度自动化的特点而受到世人瞩目, 对药物研发中加速寻找先导化合物起到了极大的推进作用. 近年来随着纳米技术的迅速发展, 组合化学策略和高通量技术也在此领域中得到应用. 为在今后的研究中能够更好地将组合化学技术应用于纳米材料和纳米技术研究领域, 本文综述了组合化学在开发新型纳米材料以及通过对纳米材料进行表面化学修饰来提高其在生物医学领域的应用研究进展, 并对目前应用于纳米技术研究的高通量筛选技术, 如磁共振成像、自动化基因芯片系统和荧光激活细胞分类术以及对纳米组合化学目前遇到的一些挑战进行了简单概括, 并对其未来的发展趋势提出了展望.     

咪唑类离子液体辅助水热法合成棒状微/纳米ZnO晶体

以醋酸锌和氢氧化钠为原料, 以水和含不同长度烷基链的咪唑类氯盐离子液体的混合物作为反应介质, 采用水热法合成出不同形貌的微/纳米ZnO晶体, 用扫描电子显微镜(SEM)和X射线衍射仪(XRD)对合成的ZnO晶体进行表征. 研究了烷基链长度、 离子液体用量、 反应时间以及反应温度对形成棒状ZnO晶体形貌的影响. 实验结果表明, 所制备的棒状ZnO晶体样品均为六方晶系结构. 在棒状ZnO晶体的制备过程中, 控制反应温度, 选择不同的离子液体及其用量十分重要.     

高分子材料的应力诱导反应

本文是作者所在科学研究群体借助超声波、高速搅拌、微波和研磨应力诱导反应制备一些难以用一般方法合成的嵌段／接枝共聚物和高分子纳米材料,探索高分子材料高性能化高效途径等方面研究工作简介。     

Metal chelate monomers based on nickel(II) cinnamate and chelating N-heterocycles as precursors of nanostructured materials

Metal chelate monomers (MCMs) have been widely used as precursors for the production of advanced functional polymers and nanomaterials. In this articel, new metal chelate monomers based on nickel(II) cinnamate (cinn) and various chelating N-heterocycles, [Ni(cinn)₂(bpy)(C₂H₅OH)] and [Ni(cinn)₂(phen)(C₂H₅OH)₂] (bpy = 2,2′-bipyridine and phen = 1,10-phenanthroline), were first synthesized and characterized. A detailed analysis of the main stages and features of the kinetics of thermolysis of MCMs was carried out. Metal-polymer nanocomposites with a core-shell structure containing metal nanoparticles evenly distributed in a stabilizing nitrogen-containing polymer matrix were obtained by thermolysis at 300?°C. Thermolysis at 450?°C resulted in pure nickel oxide nanoparticles. The nature of the ligand has been shown to affect the structure and size of the product obtained. The tribological characteristics of nanoparticles as additives to lubricating oils were studied using the pin-on-disc tribometer. At the optimum concentration of nanoparticles, the coefficient of friction is the smallest, and an increase in the concentration above the optimum level leads to an increase in the coefficient of friction.     

Nanomaterials‐based Electrochemical Sensing of Cardiac Biomarkers for Acute Myocardial Infarction: Recent Progress

The development of the methods for early and accurate diagnosis of acute myocardial infarction are needed to facilitate immediate treatment of patients. One of the ways to achieve that is the detection of cardiac biomarkers for myocardial infarction, such as thrombin, cardiac troponins (I and T), myoglobin, etc. Nanotechnology has played an important role in the development of sensitive and efficient electrochemical sensors for cardiac biomarkers. In this review, we discuss recent progress on nanomaterial‐based electrochemical sensing of various cardiac biomarkers for acute myocardial infarction.     

Organized Shells on Clay Nanotubes for Controlled Release of Macromolecules

The use of tubular halloysite clay as a nanotemplate for layer‐by‐layer (LbL) shell assembly and its utilization for controlled release of drug macromolecules are studied. The LbL nanoshell allowed additional control for the sustained release of drug loaded halloysite tubes. The number of polymeric layers in the shell and molecular weight of the assembled polymers influences the drug release rate. Three bilayer shells of chitosan and gelatin of 15 nm thicknesses gave the best encapsulation and retardation in the release rate of dexamethasone. An encapsulation of the macromolecules inside the lumen of the biocompatible clay nanotubes coupled with the polyelectrolyte shell formation provides a novel formulation for the controlled release of bioactive agents.

     

Azobenzene: A Photoactive Building Block for Supramolecular Architectures

The development of nanoscale systems capable to perform specific functions under external control is a challenging task and a fascinating objective in Chemistry. Photochromic compounds undergo radical changes in their physico‐chemical properties upon light excitation, for this reason they are valuable building blocks for the construction of photo‐controllable molecular devices, machines and materials. The E–Z photoisomerization of azobenzene has been known for almost 80 years and – owing to its high efficiency and excellent reversibility – has been widely employed to introduce an element of photo‐control in a large variety of compounds, biomolecules, nanosystems and materials. Here we present some of our research results highlighting how this outstanding photochrome can be utilized to develop systems with light‐induced functionalities.     

Gram-Scale Production of Photothermally Active Tetrahedrite Nanoparticles for Solar-Driven Water Evaporation

Pristine and substituted tetrahedrite nanoparticles have shown immense potential as low-cost and sustainable materials for energy conversion applications. However, the commonly used synthetic methods for their production are cumbersome and are not easily scalable. In this work, we report a facile colloidal synthetic protocol for the preparation of phase-pure samples of pristine (Cu₁₂Sb₄S₁₃) and Zn-substituted (Cu₁₁ZnSb₄S₁₃) tetrahedrite nanoparticles on the gram scale. Both tetrahedrite compositions were found to be photothermally responsive, enabling their use in solar-driven water evaporation.     

基于聚多巴胺的表面改性方法研究现状

多巴胺具有与贻贝粘附蛋白类似的性能。它可以沉积在几乎所有物质表面对其进行改性,且能与氨基、巯基、金属离子等官能团反应,所以将多巴胺修饰在材料表面不但可以赋予材料表面依赖于聚多巴胺(PDA)的仿生特性,而且PDA的反应活性为材料表面的二次修饰提供了理想的平台。这种基于PDA的表面修饰方法不但简单、绿色且适用性非常广,可应用于化学、生物、医药、材料等多个领域。本文从多巴胺的结构以及聚合、粘附机理研究入手,对近几年在材料表面修饰PDA,且以其为平台再二次修饰的报道进行了归纳总结,进一步认识和理解了多巴胺的性能,并为设计和构建新型的、高性能化的PDA仿生功能材料提供思路,推动研究者们在此基础上将PDA应用于更多的领域,使其向着绿色化和多样化方向发展。