Spectral studies of multi-branched fluorescence dyes based on triphenylpyridine core
摘要:
A series of novel triphenylpyridine-containing triphenylamine derivatives have been carefully designed and prepared in good yields using the stepwise route reactions. The relationship of photoluminescence property and structure of compounds 9-13 was systematically investigated via UV-vis, fluorescence, thermogravimetric and electrochemical analyzer. The highest occupied molecular orbital and the lowest unoccupied molecular orbital distributions of compounds 9-13 were calculated by density functional theory method. The high fluorescence quantum yields, desirable the highest occupied molecular orbital levels and high thermal stability of compounds 9-13 indicate that the linkage of triphenylpyridine and triphenylamine is an efficient means to enhance hole-transporting ability and fluorescent quantum yield. (C) 2013 Elsevier B.V. All rights reserved.
N-Heterocyclic Carbene-Catalysed Mukaiyama–Michael Reaction and Mukaiyama Aldol/Mukaiyama–Michael Three-Component Coupling Reaction
作者:Kim Nguyen、David W. Lupton
DOI:10.1071/ch16566
日期:——
ethers and chalcone derivatives has been discovered. In addition, a related reactioncascade involving dehydrative Mukaiyamaaldol followed by a Mukaiyama–Michael addition process has been developed. The later reaction can also be achieved as a three-component coupling reaction. The enantioselective variant of these reactions has been examined with homochiral catalysts. Though these catalysts were active
Half-sandwich Ru(II)-thioamide complexes as catalysts for one pot synthesis of aromatic 1,5-diketones
作者:Haritha Rajasekaran、Peter Jerome、Eugene V. Eliseenkov、Vadim P. Boyarskiy、Nattamai Bhuvanesh、Ramasamy Karvembu
DOI:10.1016/j.jorganchem.2022.122322
日期:2022.5
Four Ru(II)-arene thioamide complexes of the type [(η6-cymene)Ru(PPh3)(L)]+ (L = bidentate monoanionic thioamide ligand) have been synthesized and isolated as their hexafluorophosphate salts. All these complexes are fully characterized by spectroscopic methods. Molecular structures of the ligands (HL2 and HL3) and complex (3) were determined by single crystal X-ray crystallography. The ligands coordinated
[( η 6 -伞花烃)Ru(PPh 3 )(L)] + ( L = 双齿单阴离子硫代酰胺配体)类型的四种Ru(II)-芳烃硫代酰胺配合物 已合成并分离为它们的六氟磷酸盐。所有这些配合物都通过光谱方法充分表征。配体 (HL2 和 HL3) 和复合物 ( 3 ) 的分子结构通过单晶 X 射线晶体学确定。配体通过酚O和硫代酰胺S原子与Ru中心配位。在 KO t Bu存在下,所有四种配合物均作为催化剂在芳香酮和醇的一锅法合成 1,5-二酮中进行了测试,并通过 GC/GC-MS/ 1对产物进行了分析。核磁共振氢谱。配合物1和2充当催化剂以产生 1,5-二酮,而配合物3和4催化反应形成烷基化酮。反应范围扩大到各种取代的醇和酮,用催化剂 1制备 1,5-二酮。
Copper-catalyzed synthesis of 1,3,5-triarylpentane-1,5-diones from α,β-unsaturated ketones
作者:Zheng Li、Gong Wen、Lili He、Jiasheng Li、Xianggui Jia、Jingya Yang
DOI:10.1039/c5ra09155a
日期:——
An efficient method for copper catalyzed synthesis of 1,3,5-triarylpentane-1,5-diones using α,β-unsaturated ketones as a unique starting material is described.
使用α,β-不饱和酮作为独特的起始物质,描述了一种高效的铜催化合成1,3,5-三芳基戊二酮的方法。
Spectral studies of multi-branched fluorescence dyes based on triphenylpyridine core
A series of novel triphenylpyridine-containing triphenylamine derivatives have been carefully designed and prepared in good yields using the stepwise route reactions. The relationship of photoluminescence property and structure of compounds 9-13 was systematically investigated via UV-vis, fluorescence, thermogravimetric and electrochemical analyzer. The highest occupied molecular orbital and the lowest unoccupied molecular orbital distributions of compounds 9-13 were calculated by density functional theory method. The high fluorescence quantum yields, desirable the highest occupied molecular orbital levels and high thermal stability of compounds 9-13 indicate that the linkage of triphenylpyridine and triphenylamine is an efficient means to enhance hole-transporting ability and fluorescent quantum yield. (C) 2013 Elsevier B.V. All rights reserved.