Achieving Morphological Control over Lamellar Manganese Metal‐Organic Framework through Modulated Bi‐Phase Growth
Achieving Morphological Control over Lamellar Manganese Metal‐Organic Framework through Modulated Bi‐Phase Growth
复制标题
通过调节双相生长实现层状金属锰有机骨架的形态控制
DOI：
10.1002/anie.202002705
复制
发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Tongay, Sefaattin
中科院分区：
文献类型：
--
作者：
Shen, Yuxia;Shan, Bohan;Mu, Bin;Tongay, Sefaattin
提出了一种针对大规模1，4-苯二甲酸锰（MnBDC）MOFs的调制双相合成，其具有对其形态（本体与层状）的精确控制。分离金属前体和有机配体以降低动力学反应速率，从而更好地控制结晶过程。基于扫描电子显微镜（SEM）、X射线衍射（XRD）、能量色散X射线光谱（EDS）和拉曼光谱研究，连续配体供应沿着吡啶封端剂的存在在促进逐层生长和实现大晶体尺寸方面非常有效。一旦层状MnBDC稳定，拓扑插层化学用于证明溴插层在这些层状材料上的可行性。溴插层是可能的MOFs层之间的第一次。溴的插入导致层状MnBDC带隙的巨大减少，而它对体MOFs没有明显的影响。
A modulated bi‐phase synthesis towards large‐scale manganese 1,4‐benzenedicarboxylate (MnBDC) MOFs with a precise control over their morphology (bulk vs. layered) is presented. Metal precursors and organic ligands are separated to reduce the kinetic reaction rates for better control over the crystallization process. Based on scanning electron microscopy (SEM), X‐ray diffraction (XRD), energy‐dispersive X‐ray spectroscopy (EDS), and Raman spectroscopy studies, the continuous ligand supply along with the presence of pyridine capping agent are highly effective in promoting the layer‐by‐layer growth and achieving large crystal sizes. Once layered MnBDC is stabilized, topotactic intercalation chemistry was used to demonstrate the feasibility of bromine intercalation on these layered materials. Bromine intercalation is possible between the MOFs layers for the first time. Bromine intercalation causes colossal reduction in layered MnBDC band gap while it has no observable effect on bulk MOFs.