C∧C* cyclometalated platinum(II) NHCcomplexes with chelating acetylacetonate ligands have been recently shown to be an interesting class of phosphorescent emitters. We sought to clarify the role of the acetylacetonate ligand by replacing one of the coordinating oxygen atoms in the auxiliaryligand with an NH group. This allowed us to study the effect on the emission, and we found that the nature of
Ç ∧ C *环金属化铂(II)配合物NHC与乙酰丙酮螯合配位体已被最近证明是一类有趣的磷光发射体的。我们试图通过用NH基团代替辅助配体中的配位氧原子之一来阐明乙酰丙酮酸酯配体的作用。这使我们能够研究对排放的影响,我们发现发射过程的性质显著变化。本文我们报告新颖环金属铂的合成(II)NHC络合物与螯合β酮亚胺配体(3 Ž)-4-氨基-3-戊烯-2-酮和(2 ž)-3-氨基-1-苯基-2-丁烯-1-一。由于辅助配体的非对称性质,两种异构体总是形成,其可被分离和表征。它们的光物理特性以及这个类新的化合物的代表性成员的固态结构中给出。所有新的复合物发出在蓝色与量子产率高达74%在室温下在可见光谱的绿色区域。异构体的光物理数据显示出显着差异。新的化合物已被充分表征通过1 H和13C以及2D NMR(COSY,HSQC,HMBC,NOESY)光谱。DFT计算用于确定各个异构体之间的差异,并预测合成配
Dibenzofuran and dibenzothiophene based palladium(<scp>ii</scp>)/NHC catalysts – synthesis and applications in C–C bond formation
作者:Shanmugam Karthik、Thirumanavelan Gandhi
DOI:10.1039/c8nj02989j
日期:——
In the quest for a new ligand system for Pd(II)/NHCs, we developed new dibenzofuran and dibenzothiophene based palladium N-heterocyclic carbene catalysts D1–D6 in good yields. All the catalysts were characterized by multinuclear NMR spectroscopy and HRMS. The X-ray crystal structure of the representative dibenzothiophene based Pd(II)/NHC D4 was determined. Among the precatalysts, D1 was shown to be
Scope and Limitations of the Base-Free Copper(I) Oxide Catalyzed<i>N</i>-Heteroarylation of 1<i>H</i>-(Benz)imidazoles with<i>B</i>-Heteroarylboronic Acids or 2-Heteroaryl-4,4,5,5-tetramethyl-1,3,2-dioxaborolanes
作者:Agathe Begouin、Maria-João R. P. Queiroz
DOI:10.1002/hlca.201200310
日期:2013.5
copper(I) oxide catalyzed N‐arylation reaction performed in MeOH at room temperature for the synthesis of N‐substituted azoles and amines was extended to the heterocyclic series, i.e., we report herein the base‐free copper(I) oxide catalyzed N‐heteroarylation of 1H‐(benz)imidazole, by means of electron‐rich or electron‐deficient B‐heteroarylboronic acids or 2‐heteroaryl‐4,4,5,5‐tetramethyl‐1,3,2‐dioxaborolanes
USE OF DIBENZOFURANS AND DIBENZOTHIOPHENES SUBSTITUTED BY NITROGEN-BONDED FIVE-MEMBERED HETEROCYCLIC RINGS IN ORGANIC ELECTRONICS
申请人:LANGER Nicolle
公开号:US20120007063A1
公开(公告)日:2012-01-12
The present invention relates to the use of dibenzofurans and dibenzothiophenes which have at least one nitrogen-bonded five-membered heterocyclic ring as a substituent as host, blocker and/or charge transport material in organic electronics. The present invention further relates to dibenzofurans and dibenzothiophenes which comprise at least one nitrogen-bonded five-membered heterocyclic ring and at least one carbazolyl radical as substituents, to a process for preparation thereof, and to the use of these compounds in organic electronics.
HETEROLEPTIC CARBENE COMPLEXES AND THE USE THEREOF IN ORGANIC ELECTRONICS
申请人:BASF SE
公开号:US20220144869A1
公开(公告)日:2022-05-12
Heteroleptic carbene complexes and the use thereof in organic electronics The present invention relates to heteroleptic complexes comprising a phenylimidazole or phenyltriazole unit bonded via a carbene bond to a central metal atom, and phenylimidazole ligands attached via a nitrogen-metal bond to the central atom, to OLEDs which comprise such heteroleptic complexes, to light-emitting layers comprising at least one such heteroleptic complex, to a device selected from the group consisting of illuminating elements, stationary visual display units and mobile visual display units comprising such an OLED, to the use of such a heteroleptic complex in OLEDs, for example as emitter, matrix material, charge transport material and/or charge blocker.