Hiley Craig I, Inglis Kenneth K, Zanella Marco, Zhang Jiliang, Manning Troy D, Dyer Matthew S, Knaflič Tilen, Arčon Denis, Blanc Frédéric, Prassides Kosmas, Rosseinsky Matthew J
Department of Chemistry, University of Liverpool, 51 Oxford Street, Liverpool, L7 3NY, United Kingdom.
Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.
Inorg Chem. 2020 Sep 8;59(17):12545-12551. doi: 10.1021/acs.inorgchem.0c01635. Epub 2020 Aug 11.
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 KTetracene forms under the reaction conditions studied, with unreacted tetracene always present for < 2. Diffraction and C MAS NMR show that KTetracene has a crystal structure that is analogous to that of KPentacene, but with the cations ordered on two sites because of the influence of the length of the hydrocarbon on possible cation positions. KTetracene is a nonmagnetic insulator, thus further questioning the nature of reported superconductivity in this class of materials.
对金属钾与并四苯之间的固态反应产物（钾：并四苯，比例为1:1、1.5:1和2:1）进行了全面的结构表征。同步辐射X射线粉末衍射表明，在所研究的反应条件下仅形成了K并四苯，当比例小于2时总是存在未反应的并四苯。衍射和碳-13固体核磁共振表明，K并四苯具有与K并五苯类似的晶体结构，但由于烃链长度对阳离子可能位置的影响，阳离子在两个位点上有序排列。K并四苯是一种非磁性绝缘体，因此进一步质疑了这类材料中报道的超导性的本质。
