2005年11月18日 · COF-1 and COF-5 exhibit high thermal stability (to temperatures up to 500° to 600°C), permanent porosity, and high surface areas (711 and 1590 square meters per gram, respectively). The design and synthesis of crystalline extended organic structures in which the building blocks are linked by strong covalent bonds are undeveloped areas of ...

COFs材料，中文名称 共价有机框架材料，是一种新兴的由有机分子组成以共价键连接的结晶性多孔高分子材料，其核心离不开“多孔”二字。 因此，要具体掌握什么是COFs，首先要对 多孔材料 有基本的了解，而多孔材料又属于 功能材料 的一种。 天然功能材料都是在分子水平上由构筑单元构建而成。 构筑单元的结构决定了天然功能材料的某些特定功能；人类模仿大自然的这种能力也设计构建了一系列功能材料，构建经历了由简单到复杂、由低维到高维、由无孔到有孔和由无机到 …

2010年7月1日 · A covalent organic framework, COF-5, was synthesized by microwave heating and by conventional solvothermal synthesis. The highest apparent Brunauer–Emmett–Teller surface areas were obtained for materials produced by a combination of microwave heating and microwave extraction.

2023年10月1日 · Morphology regulation of COF-5 crystals by adjusting the synthesis parameters. High-selectivity and ultra-low ppb level sensing for ammonia at low temperature. Excellent stability and selectivity towards ammonia. Covalent organic frameworks (COFs) have attracted much attention due to their unique structures and properties.

2017年10月23日 · Here, we report a kinetic Monte Carlo (KMC) model that describes the formation of a prototypical boronate-ester linked 2D COF known as COF-5 from its 2,3,6,7,10,11-hexahydroxytriphenylene and 1,4-phenylene bis(boronic acid) monomers in solution.

Covalent organic frameworks COF-1 and COF-5 crystals with excellent textural properties were obtained for the first time in a 0.5 L synthesis vessel within 1–2 h by a sonochemical route.

共价有机框架(Covalent Organic Frameworks)具备密度低、比表面积大、热稳定性好的优点引起我们的关注，仅由轻元素构成的COF-5易与气体分子发生相互作用，且其结构中的硼酸酯基团可能成为有效吸附氨气的 活性位点 ，具有作为新型气敏材料的潜力。

Powder x-ray diffraction studies of the highly crystalline products (C 3 H 2 BO) 6 &(C 9 H 12) 1 (COF-1) and C 9 H 4 BO 2 (COF-5) revealed expanded porous graphitic layers that are either staggered (COF-1, P63/mmc) or eclipsed (COF-5, P6/mmm). Their crystal structures are entirely held by strong bonds between B, C, and O atoms to form rigid ...

2018年7月11日 · 最近，Science 杂志以“背靠背”的形式发表了两篇论文，两个科研团队以不同的策略分别获得了大尺寸、高质量的COF单晶结构。 其中一篇来自兰州大学的王为教授、北京大学的孙俊良教授与加州大学伯克利分校（UC Berkeley）的Omar M. Yaghi教授等研究者，采用过量苯胺作为成核抑制剂和竞争性调节剂，首次实现了基于亚胺键的三维COF大尺寸、高质量单晶的生长和X-射线衍射（SXRD）结构解析（点击阅读详细）。 今天要解读的是另外一篇论文，来自美国西 …

4 天之前 · Hao, D. et al. Fabrication of a COF-5 membrane on a functionalized α-Al 2 O 3 ceramic support using a microwave irradiation method. Chem. Commun. 50, 1462–1464 (2014).