Facile synthesis of potassium tetrathiooxalate – The “true” monomer for the preparation of electron-conductive poly(nickel-ethylenetetrathiolate)
作者:Roman Tkachov、Lukas Stepien、Aljoscha Roch、Hartmut Komber、Felix Hennersdorf、Jan J. Weigand、Ingmar Bauer、Anton Kiriy、Christoph Leyens
DOI:10.1016/j.tet.2017.03.010
日期:2017.4
Herein, aiming at optimization of the polymerization process leading to a family of hole- and electron-conducting 1,1,2,2-ethenetetrathiolate-based polymers, such as poly(nickel-1,1,2,2-ethenetetrathiolate), poly[Kx(Ni-ett)], we investigated transformations of the monomer precursor 1,3,4,6-tetrathiapentalene-2,5-dione (TPD) occurring under polymerization conditions. We found that only one ring of TPD
在此,为了优化聚合过程,以产生一类基于空穴和电子的1,2,1,2,2-乙烯四硫醇酯基聚合物,例如聚(1,2,2-乙烯四硫醇镍),聚[K x(Ni-ett)],我们研究了在聚合条件下发生的单体前体1,3,4,6-四硫杂戊烯-2,5-二酮(TPD)的转变。我们发现,在室温下惰性条件下,TPD与甲醇钾反应仅会打开一个环,从而导致形成2-oxo-1,3-dithiol-4,5-dithiolate钾盐(K 2 [ 3 ]) 。加热K 2 [ 3在惰性条件下于甲醇溶液中回流下打开第二个环,但是所得的产物不是四氢呋喃的甲醇完全分解产物乙四硫醇钾(K 4 [ 2 ]),而是四硫草酸钾(K 2 [ 4 ]), K 2 [ 3 ]脱羰的产物。初步实验表明,聚合过程中K 2 [ 4 ]的参与有利于可再现地形成适用于热电应用的高质量1,1,2,2-乙撑四硫醇酯基聚合物。