Molecular Tectonics. Porous Hydrogen-Bonded Networks Built from Derivatives of Pentaerythrityl Tetraphenyl Ether
作者:Dominic Laliberté、Thierry Maris、James D. Wuest
DOI:10.1021/jo035311h
日期:2004.3.1
groups according to well-established motifs, thereby producing three-dimensional networks. In forming these networks, each molecule of compound 3 forms a total of 12 hydrogen bonds with six others, whereas each molecule of compound 4 forms a total of 16 hydrogen bonds with four others. Both networks are highly porous and define significant interconnected channels for the inclusion of guests. In crystals
5′-O-(4,4′-Dimethoxytrityl)thymidine was attached to a pentaerythrityl-derived core, and the resulting tetravalent nucleoside cluster and the next dendritic generations served as a soluble support for the synthesis of short oligo-2′-deoxyribonucleotides in solution. Couplings using a small excess (1.5 equiv. per 5′-OH group) of the standard phosphoramidite building blocks proved efficient, and the
This specification discloses bridging graphene material elements that provide antibacterial capabilities. Elements that can include a support structure are described. Elements that can be items to be protected from microorganisms by the support structure are also described. Methods for killing microorganisms or preventing microbial contamination by applying the above antibacterial elements and related devices are also described.【Selected figure】Figure 1
High-Sensitivity Microcalorimetry and Gel Permeation Chromatography in Tandem Reveal the Complexity of the Synthesis of Poly-(2-isopropyl-2-oxazoline) Stars
作者:Jean-Richard Bullet、Evgeniya V. Korchagina、Françoise M. Winnik
DOI:10.1021/acs.macromol.1c00746
日期:2021.7.13
L-PIPOZ-N3 and a tetrafunctionalized alkyne core. Taking advantage of the thermosensitive properties of PIPOZ, high-sensitivity microcalorimetry analyses (HS-DSC), in addition to commonly used 1H nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), and spectrophotometry (UV analyses), proved to be powerful tools. On the one side, microcalorimetry analysis facilitates purification
通过两种不同的方法制备了一系列星形聚(2-异丙基-2-恶唑啉)(S-PIPOZ):“偶联(CO)”和“核优先(CF)”。一方面,对于“核优先”方法,S CF -PIPOZ 是通过从四甲苯磺酸酯官能化季戊四醇核直接阳离子开环聚合制备的。另一方面,对于“偶联”方法,S CO -PIPOZ 是通过 L-PIPOZ-N 3和四官能化炔烃核之间的炔-叠氮铜环加成反应偶联合成的。利用 PIPOZ 的热敏特性,高灵敏度微量热分析 (HS-DSC),以及常用的1H 核磁共振 (NMR)、凝胶渗透色谱 (GPC) 和分光光度法(UV 分析)被证明是强大的工具。一方面,微量热分析通过设置合适的离心分馏温度来促进聚合物的纯化,另一方面,它有助于解析其微观结构。S CO- PIPOZ 在1 H NMR、GPC 和 UV 结果之间显示出良好的相关性,并显示出尖锐的单峰 HS-DSC 吸热。与 S CO -PIPOZ
The synthesis of spirophanes from a pentaerythrityl core
Various thia- and oxa-spirobicyclic cyclophanes were synthesized from a pentaerythrityl building block and appropriate dithiols/bisphenols. (C) 2005 Elsevier Ltd. All rights reserved.