Open AccessParamagnetic Molecular Semiconductors Combining Anisotropic Magnetic Ions with TCNQ Radical Anions
Author(s) -
Ökten Üngör,
Maylu Burrows,
Tianhan Liu,
Michael Bodensteiner,
Yuwaraj Adhikari,
Zhenqi Hua,
Brian Casas,
Luis Balicas,
Peng Xiong,
Michael Shatruk
Publication year - 2021
Publication title -
inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 233
eISSN - 1520-510X
pISSN - 0020-1669
DOI - 10.1021/acs.inorgchem.1c01140
Subject(s) - chemistry , tetracyanoquinodimethane , paramagnetism , crystallography , stacking , dimethylformamide , ion , molecule , metal , inorganic chemistry , solvent , condensed matter physics , organic chemistry , physics
We report the synthesis, magnetic properties, and transport properties of paramagnetic metal complexes, [Co(DMF) 4 (TCNQ) 2 ](TCNQ) 2 ( 1 ), [La(DMF) 8 (TCNQ)](TCNQ) 5 ( 2 ), and [Nd(DMF) 7 (TCNQ)](TCNQ) 5 ( 3 ) (DMF = N , N -dimethylformamide, TCNQ = 7,7,8,8-tetracyanoquinodimethane). All three compounds contain fractionally charged TCNQ δ- anions (0 < δ < 1) and mononuclear complex cations in which the coordination environment of a metal center includes several DMF molecules and one or two terminally coordinated TCNQ δ- anions. The coordinated TCNQ δ- anions participate in π-π stacking interactions with noncoordinated TCNQ δ- anions, forming columnar substructures that provide efficient charge-transporting pathways. As a result, temperature-dependent conductivity measurements demonstrate that all three compounds exhibit semiconducting behavior.
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