Harbers Robert, Heepenstrick Timo, Perepichka Dmitrii F, Sokolowski Moritz
Institut für Physikalische und Theoretische Chemie, Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany.
Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, H3A 0B8, Quebec, Canada.
Beilstein J Nanotechnol. 2019 Jun 6;10:1188-1199. doi: 10.3762/bjnano.10.118. eCollection 2019.
We report on mixed ordered monolayers of the electron acceptor-type molecule tetracyano2,6naphthoquinodimethane (TNAP) and the electron donor-type molecule hexathiapentacene (HTPEN). This investigation was motivated by the general question which type of mixed stoichiometric structures are formed on a surface by molecules that are otherwise typically used for the synthesis of bulk charge-transfer materials. The layers were obtained by vacuum deposition on the Ag(100) surface and analyzed by low-energy electron diffraction (LEED) and scanning tunneling microscopy (STM). The formation of the mixed structure occurs spontaneously. An important motif for the structure formation is given by hydrogen bonds between the TNAP molecules. Both molecules, TNAP and HTPEN also form well-ordered monolayers on the Ag(100) surface on their own. In all structures, the molecules are adsorbed in a planar orientation on the surface. We discuss the influence of intermolecular charge transfer on the ordering in the mixed structure.
我们报道了电子受体型分子四氰基-2,6-萘醌二甲烷（TNAP）和电子供体型分子六硫并五苯（HTPEN）的混合有序单层膜。这项研究的动机源于一个普遍问题：通常用于合成体电荷转移材料的分子在表面会形成哪种类型的混合化学计量结构。这些层是通过在Ag(100)表面进行真空沉积获得的，并通过低能电子衍射（LEED）和扫描隧道显微镜（STM）进行分析。混合结构的形成是自发发生的。结构形成的一个重要基序是由TNAP分子之间的氢键给出的。TNAP和HTPEN这两种分子自身在Ag(100)表面也能形成有序的单层膜。在所有结构中，分子都以平面取向吸附在表面上。我们讨论了分子间电荷转移对混合结构中有序性的影响。
