对羟基二联苯诱导的表面金属-有机键断裂

Break of Metal-organic Chains Induced by 4,4′-Dihydroxybiphenyl on Surfaces

金属-有机杂化结构是表面在位反应过程中常见的中间体.金属-有机杂化结构中金属-有机键的断裂需要克服较高的活化能垒,往往会引起一系列竞争副反应以及分子的脱附.本文利用扫描隧道显微镜研究了4,4′-二羟基联苯分子在金属表面与预先制备的金属-有机链的作用,发现其氧端能有效地降低金属有机杂化体系断键的能垒,使得金属-有机键的断键反应能在较低的温度下进行.该结果提供了一种调控表面反应中间物的新手段.

Metal-organic hybrid structures are common intermediates in on-surface reactions.To break metal-organic bonds of the hybrid structures needs to overcome a higher activation barrier,which often leads to a series of competitive side reactions and even desorption of target products.Scanning tunneling microscope(STM)has been used to show that the oxygen terminal of 4,4′-dihydroxybiphenyl can effectively reduce the bond breaking barrier of the metal-organic hybridization system,so that the transfer of metal-organic hybrids can be carried out at a lower temperature.This result provides a new method to regulate the intermediates of on-surface reactions.