Ren Jindong, Cnudde Marvin, Brünink Dana, Buss Stefan, Daniliuc Constantin G, Liu Lacheng, Fuchs Harald, Strassert Cristian A, Gao Hong-Ying, Doltsinis Nikos L
Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149, Münster, Germany.
Center for Nanotechnology (CeNTech), Heisenbergstrasse 11, 48149, Münster, Germany.
Angew Chem Int Ed Engl. 2019 Oct 21;58(43):15396-15400. doi: 10.1002/anie.201906247. Epub 2019 Sep 12.
A series of Pt(II) complexes with tetradentate luminophores has been designed, synthesized, and deposited on coinage metal surfaces with the aim to produce highly planar self-assembled monolayers. Low-temperature scanning tunneling microscopy (STM) and density functional theory (DFT) calculations reveal a significant initial nonplanarity for all complexes. A subsequent metal-catalyzed separation of the nonplanar moiety at the bridging unit via the scission of a C-N bond is observed, leaving behind a largely planar core complex. The activation barrier of this bond scission process is found to depend strongly on the chemical nature of both bridging group and coordination plane, and to increase from Cu(111) through Ag(111) to Au(111).
设计、合成了一系列带有四齿发光体的Pt(II)配合物，并将其沉积在硬币金属表面，目的是制备高度平面的自组装单分子层。低温扫描隧道显微镜(STM)和密度泛函理论(DFT)计算表明，所有配合物最初都存在明显的非平面性。随后观察到通过C-N键断裂在桥连单元处发生金属催化的非平面部分分离，留下一个基本平面的核心配合物。发现该键断裂过程的活化能垒强烈依赖于桥连基团和配位平面的化学性质，并从Cu(111)到Ag(111)再到Au(111)逐渐增加。
