148982-08-5Relevant academic research and scientific papers
Synthesis and palladium(II) metal chemistry of thiazoline/imidazoline derived ligands: An efficient catalyst for cross-coupling reactions of arylboronic acids with acid chlorides and aryl halides
Sudharsan, Murugesan,Suresh
, p. 598 - 608 (2018/09/18)
The synthesis, reactivity, spectroscopic characterization and catalytic activities of a series of Pd(II) complexes bearing the chelating ligands 2-(4,5-dihydrothiazol-2-yl)aniline (2) and 2-(4,5-dihydro-1H-imidazol-2-yl)aniline (3) are reported. The reactions of 2 with [Pd(COD)Cl2] in 1:1 and 1:2 (ligand into metal and metal into ligand) molar ratios afforded the mononuclear complexes, PdCl2{κ2?N,S ? 2?(4,5-dihydrothiazol-2-yl)aniline} (4), Pd{κ2?N,N’?2?(4,5-dihydrothiazol-2-yl)aniline}2 (5) and Pd{κ12?N,N’?κ22?N,S ? 2?(4,5-dihydrothiazol-2-yl)aniline}2 (6), respectively, in good yields. The neutral mononuclear palladium complexes PdCl2{κ2?N,N’?(4,5-dihydro-1H-imidazol-2-yl)aniline} (7) and Pd{κ2?N,N’?2?(4,5-dihydro-1H-imidazol-2-yl)aniline}2 (8) were synthesized using [Pd(COD)Cl2] with appropriate molar ratios. The palladium complexes 4–8 were evaluated for their catalytic activities in base assisted cross coupling reactions between acid chlorides and aryl halide with boronic acids. The complex 4 was found to be an efficient catalyst for producing unsymmetrical ketones (TOF = 19.8 min?1) while complex 7 was effective for making biaryls (TOF = 19.8 min?1).
Efficient light emitters in the solid state: Synthesis, aggregation-induced emission, electroluminescence, and sensory properties of luminogens with benzene cores and multiple triarylvinyl peripherals
Chan, Carrie Y. K.,Zhao, Zujin,Lam, Jacky W. Y.,Liu, Jianzhao,Chen, Shuming,Lu, Ping,Mahtab, Faisal,Chen, Xiaojun,Sung, Herman H. Y.,Kwok, Hoi Sing,Ma, Yuguang,Williams, Ian D.,Wong, Kam Sing,Tang, Ben Zhong
experimental part, p. 378 - 389 (2012/06/30)
Benzene-cored luminogens with multiple triarylvinyl units are designed and synthesized. These propeller-shaped molecules are nonemissive when dissolved in good solvents, but become highly emissive when aggregated in poor solvents or in the solid state, showing the novel phenomenon of aggregation-induced emission. Restriction of intramolecular motion is identified as the main cause for this effect. Thanks to their high solid-state fluorescence quantum yields (up to unity) and high thermal and morphological stabilities, light-emitting diodes with the luminogens as emitters give sky-blue to greenish-blue light in high luminance and efficiencies of 10800 cd m-2, 5.8 cd A-1, and 2.7%, respectively. The emissions of the nanoaggregates of the luminogens can be quenched exponentially by picric acid, or selectively by Ru3+, with quenching constants up to 105 and ～2.0 × 10 5 L mol-1, respectively, making them highly sensitive (and selective) chemosensors for explosives and metal ions. Benzene-cored luminogens with multiple triarylvinyl units exhibit aggregation-induced emission. The high solid-state fluorescence quantum yields and high thermal and morphological stabilities of such emitters gave light-emitting diodes with sky-blue to greenish-blue light in high luminance and efficiencies. The emission could be quenched exponentially by picric acid, or selectively by Ru3+, making them highly sensitive (and selective) chemosensors for explosives and metal ions. Copyright
Hetero-analogues of Hueckel Degenerate Systems and Related Compounds: Preparation of Thienyl-substituted Fulvalene and Electron-donating Tetrathiafluvalene Vinylogues and Conductive Complexes
Ohta, Akira,Kobayashi, Tomoshige,Kato, Hiroshi
, p. 905 - 912 (2007/10/02)
1,4-Bisbenzene 9 has been prepared as a model of the six-fold Hueckel HOMO-degenerate tetracyclopentadienylideneethane biradical vinylogue.This extended dithienylfulvalene 9 was reduced reversibly to the dianion.Attempted prepara
