The site-selectivity and mechanism of Pd-catalyzed C(sp<sup>2</sup>)–H arylation of simple arenes
作者:Daeun Kim、Geunho Choi、Weonjeong Kim、Dongwook Kim、Youn K. Kang、Soon Hyeok Hong
DOI:10.1039/d0sc05414c
日期:——
functionalization reactions in organic synthesis. Despite the seminal breakthrough of the Pd-catalyzed C(sp2)–H arylation of simple arenes via a concerted metalation–deprotonation (CMD) pathway in 2006, understanding the site-selectivity of the reaction still remains elusive. Here, we have comprehensively investigated the scope, site-selectivity, and mechanism of the Pd-catalyzed direct C–H arylation reaction of
Study of the photoluminescenceproperties reveals that the EuL exhibits red emission, corresponding to the 5D0 → 7FJ (J = 1–4) transitions of the Eu3+ ion under UV light excitation. Most interestingly, when this compound was immersed in the different organic solvents and metalion DMF solutions, it shows highly selective and sensitive sensing for small organic molecules and Cu2+ ions. In connection
在溶剂热条件下制备了两个新的镧系金属有机骨架Ln(FBPT)(H 2 O)(DMF)(FBPT = 2'-氟联苯-3,4',5-三羧酸盐,Ln = Eu和Tb)。单晶X射线衍射分析表明,在作为有机连接基的FBPT的基础上,这两种化合物同构地具有相同的一维通道结构。在此,选择Eu(FBPT)(H 2 O)(DMF)(EuL)作为发光测量的代表性样品。对光致发光特性的研究表明,EuL呈现红色发射,对应于5 D 0 → 7 F J(J= 1-4)在紫外光激发下Eu 3+离子的跃迁。最有趣的是,将这种化合物浸入不同的有机溶剂和金属离子DMF溶液中时,它对小的有机分子和Cu 2+离子显示出高度的选择性和灵敏性。与此相关,本文还讨论了一种可能的传感机制。