Inorganic nanomaterials that mimic enzymes are fascinating as they potentially have improved properties relative to native enzymes,such as greater resistance to extremes of pH and temperature and lowe
Thiourea dioxide(TD),a green industrial reductant,has been explored as efficient chemiluminescence(CL)coreactant for the first time.
Sulfide(S2-)anion,a common toxic pollutant,exists widely in natural water and wastewater,and the concentration of which is an important environmental index [1].
Silver nanoclusters have emerged as promising alternative to the semiconductor quantum dots due to their ultrasmall size,outstanding photostability and good biocompatibility.
It was only in the past decade that metal-ligand interactions have also been utilized to construct supramolecular gels,which was also called metallogels.
电荷转移(charge transfer)凝胶是主要基于电荷转移相互作用而形成的凝胶,近年来,基于电荷转移有机凝胶的研究备受关注[1]。我们设计合成了二肽-苝酰亚胺偶联化合物(FFPBI,图 1),研究了FF-PBI 与氨基酸-芘化合物[2](PBLG,图1)在不同溶剂体系中胶凝化过程、结构以及性质。研究发现,FF-PBI 与PBLG 在甲苯和乙醇中,都可以形成电荷转移有机凝胶(图1A)。
我们设计合成了一系列氨基酸脲衍生物类低分子量有机小分子凝胶因子,这类凝胶因子发生超分子自组装不仅能使有机溶剂成胶,还可以固化不同类型的润滑油。通过核磁氢谱表征这些小分子凝胶因子的成胶机理,主要通过分子内氢键和范德华力自组装成纤维结构,进而组成成三维的网络结构固化润滑油。油凝胶具有优异的温度诱导相变行为,能够在加热时快速液化,冷却时又可以迅速形成凝胶。并且具有触变性,在剪切作用下黏度变稀。这些特征使
在固体表面接枝聚合物刷是一个有效改善表面性能的手段[1]。聚合物刷的动态特性、局部高浓度的功能基团和独特的框架结构为其在非均相催化的研究和应用提供可能。我们之前的研究表明催化剂均匀有序的排列能够提高催化性能[2]而且聚合物刷表面微环境的改变的确对催化性能有影响[3]。
Application and stability of dispersions are strongly influenced by the degree of agglomeration and flocculation of dispersed particles.
氢键流体在自然界中广泛存在,其在生物、化学化工、物理、超分子和晶体工程等领域具有广泛应用,特别是在微观尺度中的渗透问题十分有趣。众所周知,体系中半透膜的存在会导致膜两侧存在渗透压。本文利用经典流体的密度泛函理论并结合改进的基本度量理论研究了在半透膜存在条件下,受限于介观微腔中氢键流体的聚集态结构。进而通过溶剂及溶质两类流体分子的密度分布,研究了流体分子尺度、氢键作用及溶剂-溶质分子比例对体系渗透压