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Highly Conducting and Flexible Radical Crystals
Author(s) -
Kwon Taeyeon,
Koo Jin Young,
Choi Hee Cheul
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202006263
Subject(s) - flexibility (engineering) , conductivity , materials science , anthracene , crystal (programming language) , bent molecular geometry , electrical resistivity and conductivity , crystallography , nanotechnology , chemistry , composite material , photochemistry , electrical engineering , computer science , statistics , mathematics , programming language , engineering
Together with high conductivity, high flexibility is an important property required for next generation organic electronic components. Both properties are difficult to achieve together especially when the components are crystalline because of the intrinsic high brittleness of organic molecular crystals. We report an organic radical crystal system that has both high flexibility and high conductivity. The crystal consists of 9,10‐bis(phenylethynyl)anthracene radical cation ( BPEA .+ ) units, and shows flexibility under pressure with high conductivity in ambient condition exhibiting average conductivity of 2.68 S cm −1 when normal linear shape, as well as 2.43 S cm −1 when bent. The structural analysis reveals that both a short π–π distance (3.290 Å) between BPEA .+ units that are aligned along the crystal length direction, and the presence of PF 6 − counter ions induce flexibility and high electrical conductivity.