- Iridium(iii)-surfactant complex immobilized in mesoporous silica via templated synthesis: A new route to optical materials
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In this work we report the preparation of a new blue-emitting material based on the templated synthesis of mesoporous silica (MCM-41) using micellar solutions of the newly synthesized monocationic metallosurfactant complex bis[1-benzyl-4-(2,4-difluorophen
- De Barros E Silva Botelho, Moema,Fernandez-Hernandez, Jesus Miguel,De Queiroz, Thiago Branquinho,Eckert, Hellmut,De Cola, Luisa,De Camargo, Andrea Simone Stucchi
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- Highly efficient and robust blue phosphorescent Pt(II) compounds with a phenyl-1,2,3-triazolyl and a pyridyl- 1,2,4-triazolyl chelate core
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A new class of brightly phosphorescent Pt(II) compounds that contain an NC-chelate phenyl-1,2,3-triazolyl ligand (ptrz) and an NC-chelate pyridyl-1,2,4-triazolyl ligand (pytrz) in the central core is achieved. The impact of various substituent groups on phosphorescence of this class of molecules is examined. Crystal structural analyses revealed that this class of compounds has a great tendency to form stacked dimers-one of which is persistent even in the gas phase-leading to excimer emission. The introduction of bulky substituents, such as diphenyl amino (NPh 2 ) or trityl (CPh 3 ), is found to greatly diminish the excimer emission. Using this approach, several highly effi cient blue and green phosphorescent Pt(II) compounds with λ em at ≈450-460 nm and F φ ≈ 0.70 to 1.00 are obtained. These molecules are highly robust with exceptionally high thermal stability. Bright bluish-green electrophosphorescent devices with external quantum effi ciencies as high as 16.7% are fabricated.
- Wang, Xiang,Gong, Shao-Long,Song, Datong,Lu, Zheng-Hong,Wang, Suning
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- An efficient Cu-catalyzed azide-alkyne cycloaddition (CuAAC) reaction in aqueous medium with a zwitterionic ligand, betaine
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Cu-catalyzed azide-alkyne cycloaddition reaction in aqueous medium was dramatically accelerated by a simple zwitterionic additive, betaine, at ambient temperature. In the presence of betaine, 1,4-disubstituted-1,2,3-triazoles were obtained from azides and
- Shin, Jung-Ah,Oh, Su-Jin,Lee, Hee-Yoon,Lim, Yeong-Gweon
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p. 2450 - 2456
(2017/07/24)
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- LUMINESCENT COMPOUNDS AND METHODS OF USING SAME
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The invention provides compounds of the general formula (10). The cyclometallating ligand of compound (10) includes an N-donor heterocyclic ligand (2) where at least one X is nitrogen and which is directly bonded to a phenyl group. The phenyl group is ort
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Page/Page column 45; 46
(2014/09/29)
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- One-pot click synthesis of 1N-alkyl-4-aryl-1,2,3-triazoles from protected arylalkynes and alkyl bromides
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1N-Alkyl-4-aryl-1,2,3-triazoles have been prepared through a multicomponent one-pot protocol from the corresponding (arylethynyl)trimethylsilanes and alkyl bromides. In situ alkyl azide formation and alkyne deprotection followed by copper(I)-catalyzed click cycloaddition afforded the desired 1,4-disubstituted 1,2,3-triazoles in generally good to excellent yield, with only minor observation of the undesired 1,5-regioisomeric cycloadduct. The protocol eliminates the need to use reactive organic azides and terminal alkynes. Georg Thieme Verlag Stuttgart. New York.
- Ladouceur, Sebastien,Soliman, Ahmed M.,Zysman-Colman, Eli
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p. 3604 - 3611
(2011/12/16)
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