Affiliation:
1. Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of Sciences Beijing 100190 P. R. China
2. School of Physical Sciences University of Chinese Academy of Sciences Beijing 100190 P. R. China
3. 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
4. State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 P. R. China
5. Songshan Lake Material Laboratory Dongguan Guangdong 523808 P. R. China
Abstract
AbstractA 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.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
8 articles.
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