Structures and Structural Evolution of Sublayer Surfaces of Metal-Organic Frameworks

Xiaocang Han; Pan Liu; Fang Lin; Wenqian Chen; Ruichun Luo; Qi Han; Zhuo Jiang; Xiaodong Wang; Shuangxi Song; Kolan Madhav Reddy; Hexiang Deng; Mingwei Chen

doi:10.1002/anie.202008100

Structures and Structural Evolution of Sublayer Surfaces of Metal-Organic Frameworks

Angew Chem Int Ed Engl. 2020 Nov 23;59(48):21419-21424. doi: 10.1002/anie.202008100. Epub 2020 Sep 23.

Authors

Xiaocang Han¹, Pan Liu^{1

2}, Fang Lin³, Wenqian Chen^{2

4}, Ruichun Luo¹, Qi Han⁵, Zhuo Jiang⁵, Xiaodong Wang¹, Shuangxi Song¹, Kolan Madhav Reddy^{1

2}, Hexiang Deng⁵, Mingwei Chen^{2

6}

Affiliations

¹ Department Shanghai Key Laboratory of Advanced High-temperature Materials and Precision Forming, State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
² WPI Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan.
³ College of Electronic Engineering, South China Agricultural University, Guangzhou, Guangdong, 510642, China.
⁴ School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
⁵ Key Laboratory of Biomedical Polymers-Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China.
⁶ Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA.

PMID: 32797696
DOI: 10.1002/anie.202008100

Abstract

The structural characterization of sublayer surfaces of MIL-101 is reported by low-dose spherical aberration-corrected high-resolution transmission electron microscopy (HRTEM). The state-of-the-art microscopy directly images atomic/molecular configurations in thin crystals from charge density projections, and uncovers the structures of sublayer surfaces and their evolution to stable surfaces regulated by inorganic Cr₃ (μ₃ -O) trimers. This study provides compelling evidence of metal-organic frameworks (MOFs) crystal growth via the assembly of sublayer surfaces and has important implications in understanding the crystal growth and surface-related properties of MOFs.

Keywords: charge density projection approximation; crystal growth; high-resolution imaging; metal-oxygen trimers; sublayer surfaces.

Abstract

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