Synthesis of Imine-Based Covalent Organic Frameworks Catalyzed by Metal Halides and in Situ Growth of Perovskite@COF Composites,ACS Materials Letters

当前位置： X-MOL 学术 › ACS Mater. Lett. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Synthesis of Imine-Based Covalent Organic Frameworks Catalyzed by Metal Halides and in Situ Growth of Perovskite@COF Composites
ACS Materials Letters ( IF 9.6 ) Pub Date : 2020-10-23 , DOI: 10.1021/acsmaterialslett.0c00376
Yifeng Liu ₁ , Yifan Zhu ₁ , Sampath B. Alahakoon ₁ , Eilaf Egap _{1,

2}

Affiliation

The development of economical and versatile catalysts is of both technological and fundamental interest in the synthesis of COFs. Imine COFs are a widely investigated class of COFs commonly synthesized via the Schiff base reaction that requires the use of acetic acid, elevated temperatures, reduced pressure, and long reaction periods. Here, we present group 14–15 metal halides as general and low-cost catalysts for the synthesis of imine COFs. The catalytic activity of lead, antimony, and bismuth halides is proved by the successful synthesis of a series of imine COFs with varying pore sizes and structural stability. Synthesis of highly crystalline COFs with surface areas up to 2522 m²/g is achieved. Mechanistic studies reveal that the dynamic imine exchange triggered by metal halides promotes the crystallization of COFs. The COF matrices formed under metal halide catalysis were used for in situ perovskite synthesis. The perovskite@COF composites maintain the integrity of COFs while enhancing the stability of perovskites by being embedded in COFs. This work expands the catalyst choice for imine-based COFs and provides a design paradigm for the synthesis of perovskite@COF composites for future applications.

中文翻译：

金属卤化物催化亚胺基共价有机骨架的合成及钙钛矿@COF复合材料的原位生长

在COF的合成中，开发经济实用的催化剂具有技术和根本意义。亚胺COF是广泛研究的一类，通常是通过席夫碱反应合成的，需要使用乙酸，升高的温度，降低的压力和较长的反应时间。在这里，我们介绍14-15族金属卤化物作为合成亚胺COFs的一般和低成本催化剂。成功地合成了一系列具有不同孔径和结构稳定性的亚胺COF，证明了铅，锑和卤化铋的催化活性。合成表面积高达2522 m ²的高结晶COF/ g已实现。机理研究表明，由金属卤化物引发的动态亚胺交换促进了COF的结晶。在金属卤化物催化下形成的COF基质用于原位钙钛矿合成。钙钛矿@COF复合材料通过嵌入COF中，可保持COF的完整性，同时增强钙钛矿的稳定性。这项工作扩展了亚胺基COF的催化剂选择，并为合成钙钛矿@COF复合材料提供了设计范例，以供将来应用。

更新日期：2020-10-23

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11