of dynamic covalent reaction is essential to understand and rationally design complex structures and reaction networks. Herein, the reactivity of aldehydes and amines in various rapid imineformation in aqueoussolution by microfluidic NMR spectroscopy was quantified. Investigation of reaction kinetics allowed to quantify the forward rate constants k+ by an empirical equation, of which three independent
Interplay between n→π* Interactions and Dynamic Covalent Bonds: Quantification and Modulation by Solvent Effects
作者:Hao Zheng、Hebo Ye、Xiaoxia Yu、Lei You
DOI:10.1021/jacs.9b01006
日期:2019.6.5
orbital interaction was then quantified through imine exchange, the equilibrium of which was successfully correlated with the difference in natural bond orbital stabilization energy of n→π* interactions of aldehyde and its imine. Moreover, the examination of solvent effects provided insights into the distinct feature of the modulation of n→π* interaction with aprotic and protic solvents. The n→π* interaction
Dodecylamine-migration associated with the formation of double-chained amphiphilic imine induces the morphological transformation from micelles to giant vesicles.
十二烷胺迁移与双链两性亚胺形成相关,诱导从胶束到巨大囊泡的形态转变。
Temporal Emergence of Giant Vesicles Accompanied by Hydrolysis of Ammonium Amphiphiles with a Schiff-base Segment
作者:Taro Toyota、Katsuto Takakura、Tadashi Sugawara
DOI:10.1246/cl.2004.1442
日期:2004.11
An aqueous dispersion of the ammonium amphiphile with a Schiff-base segment exhibited the formation and decomposition of giant vesicles with diameters of several micrometers 2–4 h after the preparation. The time course trace of the morphological changes of the self-aggregates by means of light microscopy, electron microscopy and 1H NMR revealed that the temporal emergence of the giant vesicles was dependent on the progress of hydrolysis of the Schiff-base segment.
Dendritic fibrous nano-titanium (DFNT) with highly dispersed poly(ionic liquids) as a nanocatalyst for synthesis of dimethyl carbonate from methanol and carbon dioxide
作者:Yanqing Chen、Seyed Mohsen Sadeghzadeh
DOI:10.1016/j.molliq.2023.122201
日期:2023.8
composite did not considerably alter after IL/Mo loading, and its mesoporous anatomy as well as crystal line shape were still sustained. This catalyst suffers from a low rate of DMC formation for the direct production of dimethyl carbonate (DMC) from methanol and CO due to its small specific outer layer and less active sites. In the current paper, we improved the issueby uniform dispersion of doped IL/Mo
同时制造相连接和纤维结构能够改善纳米 TiO2 的分离、催化能力和催化活性。然而,这很容易,而且仍然本质上需要绿色制造。在这里,通过方便且环保的深度共晶溶剂调节方法,很好地制备了具有锐钛矿/TiO相界面和高比外层的先进蒲公英状TiO。大的特定外层是其 3D 分层解剖结构的结果,由具有介孔的 2D 超薄纳米片组装而成。我们采用没有挑战性的合成路径,在树枝状纤维纳米钛(DFNT@IL/Mo)上负载了各种离子液体基团,制备了多钼酸[Mo]纳米球。 DFNT可以通过化学键相互作用提供丰富的羟基以均匀负载IL,而IL可以调整适当的纤维尺寸并显示有助于与CO化学吸附的氨基活性吸附位点。DFNT@IL/Mo的整体形貌IL/Mo负载后复合材料没有显着改变,并且其介孔结构和晶体形状仍然保持不变。该催化剂由于其特定的外层较小且活性位点较少,因此在由甲醇和CO直接生产碳酸二甲酯(DMC)时DMC形成率较低。在本文中,我们通过掺杂