Aryl 5-substitution of a phenyl-pyridine based ligand as a viable way to influence the opto-electronic properties of bis-cyclometalated Ir(iii) heteroleptic complexes
摘要:
本手稿报告了一系列异极环化铱(III)配合物的合成、光物理研究和电致发光特性,这些配合物以 2,5-二芳基吡啶为 C^N 环化配体,乙酰丙酮为辅助配体。这些配合物通过元素分析、ESI-MS、多核 NMR、TGA 和电化学进行表征。它们的光学特性通过紫外可见光和光致发光进行了研究。DFT 和 TD-DFT 计算进一步揭示了 5-芳基取代对新复合物的电子和光物理性质的影响。合适的 π-扩展配体的存在对相应的溶液处理发光二极管的性能产生了有利的影响,在电流效率为 10.0 cd A-1 时,最大亮度可达 10 620 cd m-2。
Aryl 5-substitution of a phenyl-pyridine based ligand as a viable way to influence the opto-electronic properties of bis-cyclometalated Ir(iii) heteroleptic complexes
摘要:
本手稿报告了一系列异极环化铱(III)配合物的合成、光物理研究和电致发光特性,这些配合物以 2,5-二芳基吡啶为 C^N 环化配体,乙酰丙酮为辅助配体。这些配合物通过元素分析、ESI-MS、多核 NMR、TGA 和电化学进行表征。它们的光学特性通过紫外可见光和光致发光进行了研究。DFT 和 TD-DFT 计算进一步揭示了 5-芳基取代对新复合物的电子和光物理性质的影响。合适的 π-扩展配体的存在对相应的溶液处理发光二极管的性能产生了有利的影响,在电流效率为 10.0 cd A-1 时,最大亮度可达 10 620 cd m-2。
POPd/TBAB co-catalyzed Suzuki cross-coupling reaction of heteroaryl chlorides/bromides with 4-fluorophenylboronic acid in water
作者:Ben Li、Zhiqiang Zhang
DOI:10.1007/s13738-015-0775-9
日期:2016.4
free and efficient heterogeneous synthesis for bridging heteroaryl halides and 4-fluorophenylboronic acid was studied in aqueous media according to the Suzuki cross-coupling protocol. High yields of heteroaryl-aryl fluorides were successfully obtained with: chloro-/bromo-substituted pyridine, thiophene, indole, and inzole in neat water using palladium phosphinous acid complexes (POPd)/tetrabutylammonium
Efficient Suzuki-Miyaura mono-arylation of symmetrical diiodo(hetero)arenes
作者:Alexander Sapegin、Mikhail Krasavin
DOI:10.1016/j.tetlet.2018.04.015
日期:2018.5
A reliable protocol for converting 1,4-diiodo-2,3,5,6-tetrafluorobenzene into 1-(hetero)aryl-4-iodo-2,3,5,6-tetrafluorobenzene derivatives has been lacking in the literature. We have identified optimal conditions to achieve this conversion in good yields and have minimized formation of the bis-coupling product. The newly identified protocol involving the use of a syringe pump has been extended to other symmetrical diiodo(hetero)arenes. (C) 2018 Elsevier Ltd. All rights reserved.
Iron-Catalyzed <i>ortho</i>-Selective C–H Borylation of 2-Phenylpyridines and Their Analogs
作者:Yusuke Yoshigoe、Yoichiro Kuninobu
DOI:10.1021/acs.orglett.7b01423
日期:2017.7.7
Treatment of 2-phenylpyridines (or their analogs) with a 9-bicycloboranonane dimer (9-BBN dimer) in the presence of a catalytic amount of a commercially available iron salt, FeBr3, gave ortho-borylated products in moderate to excellent yields with good functional group tolerance. The reaction proceeded in good yield, even in gram-scale, and also occurred at the C-H bond of heteroaromatic compounds. The cost of the C-H borylation is dramatically lower than that of a previously reported similar palladium-catalyzed reaction. The products exhibit an intramolecular B-N Lewis acid-base interaction and fluoresce in both solution and solid states due to their electron push-pull structures.