一种合成Ti-MOF单晶的螯合配位调制方法,Inorganic Chemistry Frontiers

当前位置： X-MOL 学术 › Inorg. Chem. Front. › 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.)

一种合成Ti-MOF单晶的螯合配位调制方法
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2024-04-17 , DOI: 10.1039/d4qi00436a
Hui-Zi Li _{1,

2} , Shangda Li ₁ , Fei Wang ₁ , Jian Zhang ₁

Affiliation

尽管钛基金属有机框架（Ti-MOF）有望成为高效的光催化剂，但钛离子的高反应活性使得新型Ti-MOF的合成和结构测定相当具有挑战性。在本研究中，我们提出了一种利用具有螯合配位基团的分子作为调节剂来合成Ti-MOF单晶的螯合配位调节（CCM）方法。通过该方法，获得了三种Ti-MOF（FIR-117-119），并通过单晶X射线衍射（SCXRD）确定了它们的结构，验证了该方法的普适性。通过捕获中间体并确定其单晶结构，阐明了调节剂在Ti-MOF单晶生长中的作用：使用螯合配位分子作为调节剂和竞争性配体通过形成Ti来减慢反应速率–调节剂关键中间体，平衡 Ti-MOF 的形成和单晶的生长。此外，FIR-119由于其良好的光吸收能力和窄带隙，在可见光下表现出优异的光催化性能。这些结果凸显了螯合配位调制方法在合成新型光活性 Ti-MOF 及其单晶中的潜力。

"点击查看英文标题和摘要"

A chelating coordination modulation method for the synthesis of Ti-MOF single crystals

Even though titanium-based metal–organic frameworks (Ti-MOFs) are promising as efficient photocatalysts, the high reactivity of titanium ions makes the synthesis and structure determination of new Ti-MOFs quite challenging. In this study, we propose a chelating coordination modulation (CCM) method for the synthesis of Ti-MOF single crystals by using molecules with chelating coordination groups as the modulator. Thanks to this method, three Ti-MOFs (FIR-117–119) have been obtained and their structures were determined by single crystal X-ray diffraction (SCXRD), validating the universality of this approach. By capturing the intermediate and determining its single crystal structure, the role of the modulator in the growth of Ti-MOF single crystals is clarified: the use of a chelating coordination molecule as the modulator and a competitive ligand slows down the reaction rate by forming Ti–modulator key intermediates, which balance the formation of Ti-MOFs and growth of single crystals. Furthermore, FIR-119 exhibits excellent photocatalytic performance under visible light due to its good light absorption ability with a narrow bandgap. These results highlight the potential of the chelating coordination modulation method in the synthesis of new photoactive Ti-MOFs and their single crystals.

更新日期：2024-04-17

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南