Volume 19, Issue 21 2207877
Research Article

Synthesizing Cr-Based Two-Dimensional Conjugated Metal-Organic Framework Through On-Surface Substitution Reaction

Weiliang Zhong

Weiliang Zhong

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190 P. R. China

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Tingfeng Zhang

Tingfeng Zhang

Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

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Dan Chen

Dan Chen

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

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Nuoyu Su

Nuoyu Su

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190 P. R. China

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Guangyao Miao

Guangyao Miao

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 P. R. China

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Jiandong Guo

Jiandong Guo

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 P. R. China

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing, 100190 P. R. China

Songshan Lake Material Laboratory, Dongguan, Guangdong, 523808 P. R. China

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Long Chen

Corresponding Author

Long Chen

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Zhengfei Wang

Corresponding Author

Zhengfei Wang

Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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Weihua Wang

Corresponding Author

Weihua Wang

Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 P. R. China

Songshan Lake Material Laboratory, Dongguan, Guangdong, 523808 P. R. China

E-mail: [email protected]; [email protected]; [email protected]

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First published: 26 February 2023
Citations: 4

Abstract

A single-layer Cr3(HITP)2 (HITP = 2,3,6,7,10,11-hexaiminotriphenylene) conjugated metal-organic framework (c-MOF) is synthesized under ultrahigh vacuum conditions by substituting Cr for Ni in Ni3(HITP)2 template. As revealed by low-temperature scanning tunneling microscopy and scanning tunneling spectroscopy, while codeposition of Cr atoms and 2,3,6,7,10,11-hexaaminotriphenylene precursors produces irregular branches, crystalline Cr3(HITP)2 frameworks are obtained by depositing Cr atoms to the Ni3(HITP)2 templates. The density functional theory calculations reveal that the binding energy between Cr and HITP ligands is much higher than that for Ni, which hampers the growth of crystalline Cr3(HITP)2 frameworks through direct coordination assembly but makes the substitution reaction energetically favorable. This work demonstrates a new strategy to prepare high-quality early-transition-metal-based c-MOFs under ultrahigh vacuum conditions.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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