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Paramagnetic Conducting Metal–Organic Frameworks with Three‐Dimensional Structure
Author(s) -
Wu Xiaoyu,
Qiu Yi,
Chen Zhijun,
Guan Bo,
Hao Xiang,
Rykov Alexandre I.,
Sun Yimeng,
Liu Liyao,
Zou Ye,
Sun Junliang,
Xu Wei,
Zhu Daoben
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202009253
Subject(s) - antiferromagnetism , paramagnetism , seebeck coefficient , intramolecular force , materials science , magnetic semiconductor , thermoelectric effect , absorption edge , band gap , electrical resistivity and conductivity , absorption (acoustics) , metal , absorption spectroscopy , metal organic framework , semiconductor , crystallography , analytical chemistry (journal) , chemistry , condensed matter physics , stereochemistry , optics , optoelectronics , organic chemistry , thermal conductivity , physics , engineering , electrical engineering , metallurgy , composite material , thermodynamics , adsorption
3D well‐crystallized metal–organic frameworks (MOFs), M‐THBQ (M=Fe, Co, Mn, THBQ=tetrahydroxybenzoquinone), are synthesized and characterized. Their structures are determined as cubic cell in the group of Pm 3 ‾ from powder X‐ray diffraction data, and their properties of electronic, magnetic and spectroscopic are also investigated. They are all semiconductors, and Fe‐THBQ exhibits the air‐stable n‐type thermoelectric characteristic as its Seebeck coefficient reaches −130 μV K −1 , and the electrical conductivity is 2.7×10 −4 S cm −1 at 300 K. Additional, M‐THBQ are paramagnetic, and the value of Weiss constant of Fe‐THBQ is −219.37 K, indicating the existence of robust intramolecular antiferromagnetic exchanges. Meanwhile, they display strong absorption bands in the range of 220 to 1000 nm, suggest M‐THBQ could have the potential to become photoabsorbers, and Fe‐THBQ exhibits a narrow band gap of 0.63 eV according to the ultraviolet absorption edge spectrum.