Open AccessCrystal Structure and Stoichiometric Composition of Potassium-Intercalated Tetracene
Author(s) -
Craig I. Hiley,
Kenneth K. Inglis,
Marco Zanella,
Jiliang Zhang,
Troy D. Manning,
Matthew S. Dyer,
Tilen Knaflič,
Denis Arčon,
Frédéric Blanc,
Kosmas Prassides,
Matthew J. Rosseinsky
Publication year - 2020
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.0c01635
Subject(s) - tetracene , chemistry , crystallography , potassium , stoichiometry , crystal structure , metal , diffraction , synchrotron , powder diffraction , x ray crystallography , hydrocarbon , inorganic chemistry , molecule , organic chemistry , physics , nuclear physics , optics
The products of the solid-state reactions between potassium metal and tetracene (K:Tetracene, 1:1, 1.5:1, and 2:1) are fully structurally characterized. Synchrotron X-ray powder diffraction shows that only K 2 Tetracene forms under the reaction conditions studied, with unreacted tetracene always present for x < 2. Diffraction and 13 C MAS NMR show that K 2 Tetracene has a crystal structure that is analogous to that of K 2 Pentacene, but with the cations ordered on two sites because of the influence of the length of the hydrocarbon on possible cation positions. K 2 Tetracene is a nonmagnetic insulator, thus further questioning the nature of reported superconductivity in this class of materials.