Triptycene-Based Polymers of Intrinsic Microporosity: Organic Materials That Can Be Tailored for Gas Adsorption
作者:Bader S. Ghanem、Mohammed Hashem、Kenneth D. M. Harris、Kadhum J. Msayib、Mingcan Xu、Peter M. Budd、Nhamo Chaukura、David Book、Steven Tedds、Allan Walton、Neil B. McKeown
DOI:10.1021/ma100640m
日期:2010.6.22
report the synthesis and properties of network polymers of intrinsic microporosity (network−PIMs) derived from triptycene monomers that possess alkyl groups attached to their bridgehead positions. Gas adsorption can be controlled by the length and branching of the alkyl chains so that the apparent BET surface area of the materials can be tuned within the range 618−1760 m2 g−1. Shorter (e.g., methyl) or branched
我们报告了固有的微孔性(network-PIMs)网络聚合物的合成和性质,该聚合物来自具有连接至其桥头位置的烷基的三茂基单体。可以通过烷基链的长度和支链来控制气体的吸附,从而使材料的表观BET表面积可以在618-1760 m 2 g -1的范围内进行调整。。较短的(例如甲基)或支链的(例如异丙基)烷基链提供了最大的微孔性,而较长的烷基链似乎阻止了由刚性有机骨架产生的微孔。与其他PIM相比,增强的微孔性源自骨架的大分子形状,这是由三萜烯单元决定的,这有助于减少刚性骨架的延伸平面支柱之间的分子间接触,从而降低了填充在骨架内的效率。坚硬的。对于具有低或中等压力(在1 bar / 77K下为1.83质量%;在18 bar / 77 K下为3.4质量%)的纯有机材料,具有甲基或异丙基取代基的三茂基PIM的氢吸附能力是最高的。 )。
Synthesis, Assembly, and Thin Film Transistors of Dihydrodiazapentacene: An Isostructural Motif for Pentacene
作者:Qian Miao、Thuc-Quyen Nguyen、Takao Someya、Graciela B. Blanchet、Colin Nuckolls
DOI:10.1021/ja036466+
日期:2003.8.1
films show that the molecules stack in layers with their long axis upright from the surface. Some of the derivatives synthesized for this study have unexpectedly high solubility in polar solvents such as DMF and DMSO. The crystal structure from DMF reveals self-assembled channels with each of the aniline functionalities forming a hydrogen bond with solvent. In more nonpolar solvents, the solid-state assembly
下面的研究详细介绍了二氢二氮杂并五苯的合成、组装和薄膜晶体管。这些分子具有与并五苯相同的分子形状,但更容易制备并且具有更高的环境稳定性。由二氢二氮杂并五苯制成的薄膜表现为场效应晶体管,其迁移率和开/关比足够高,可用于某些应用。在这些薄膜上的 X 射线衍射和 AFM 实验表明,分子堆叠成层,其长轴垂直于表面。本研究合成的一些衍生物在极性溶剂(如 DMF 和 DMSO)中具有出乎意料的高溶解度。DMF 的晶体结构揭示了自组装通道,每个苯胺官能团与溶剂形成氢键。在更多的非极性溶剂中,
A Photoresponsive Smart Covalent Organic Framework
Ordered π‐columnar structures found in covalentorganicframeworks (COFs) render them attractive as smart materials. However, external‐stimuli‐responsive COFs have not been explored. Here we report the design and synthesis of a photoresponsive COF with anthracene units as the photoresponsive π‐building blocks. The COF is switchable upon photoirradiation to yield a concavo‐convex polygon skeleton through
A triptycene-based polymer of intrinsic microposity that displays enhanced surface area and hydrogen adsorption
作者:Bader S. Ghanem、Kadhum J. Msayib、Neil B. McKeown、Kenneth D. M. Harris、Zhigang Pan、Peter M. Budd、Anna Butler、James Selbie、David Book、Allan Walton
DOI:10.1039/b614214a
日期:——
A novel triptycene-based polymer of intrinsic microporosity (Trip-PIM) displays enhanced surface area (1065 m2 g−1) and reversibly adsorbs 1.65% hydrogen by mass at 1 bar/77 K and 2.71% at 10 bar/77 K.