Optoelectronic Properties Studies of Deep-Blue Emitters Base on Imidazole Derivative by Regulating Molecule Conjugation
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Imidazole
Derivative (finance)
Base (topology)
Abstract Charge iterative extended Hückel theory calculations on electronic effects in imidazole‐ligated Fe‐porphyrins (among other metalloporphyrins) reveal that the metal UTE‐v imidazole pn interaction is larger than the Fe dn‐ imidazole pn.
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Abstract Imidazole (I) werden mit Orthoamei‐ sensäureester in die 1‐Diethoxymethyl‐imidazole (II) umgewandelt und dann zu den 2‐Lithio‐imidazolen (III) bei niederer Temperatur metalliert.
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To understand the substituting effects of imidazole ring on the reaction equilibrium,the interactions between diperoxovanadate complex NH_4[OV(O_2)_2{2-(2'-Pyridine)-Imidazole}]·4H_2O (abbr.bpV(Imi-Py)) and a series of imidazole-like ligands (imidazole,2-methyl-imidazole,4-methyl-imidazole,and histidine) in solution were explored using multinuclear (~1H,~(13)C,and ~(51)V) magnetic resonance,diffusion ordered spectroscopy (DOSY),and variable temperature NMR in 0.15 mol·L~(-1) NaCl ionic medium for mimicking the physiological conditions.The experimental results indicated that the activities of bpV(Imi-Py) and organic ligands were as follows:imidazole≈4-methyl-imidazole2-methyl- imidazolehistidine.The stedc effect of the organic ligands affects the reaction equilibrium.At the same time,new six- coordinated peroxovanadate species [OV(O_2)_2L]-(L=imidazole-like ligands) were formed due to the competitive coordination between 2-(2'-pyridyl)-imidazole and the imidazole-like ligands.When the ligand was 4-methyl- imidazole or histidine,a pair of isomers was formed.
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Abstract A number of imidazole derivatives were prepared in the course of studying the limits of carbon‐metal bond formation in complexes of imidazole with first‐row transition metals. Seven of the compounds were new. The 4‐ and 5‐methyl and 4,5‐dimethyl derivatives of l‐(2‐pyridyl)‐imidazole were prepared by reaction of the appropriate imidazole with 2‐bromopyridine. Alkylation of imidazole, 4,5‐dimethylimidazole, and benzimidazole with 2‐chloromethylpyridine gave a series of 1‐(2‐pyridylmethyl)imidazoles. 1‐(2,3‐Diaminopropyl)imidazole was prepared in six steps via a Gabriel sequence.
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Benzimidazole
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In an efficient one-pot/multi-step procedure 1-anilino-2,3-dihydro-1H-imidazole-2-thiones were prepared starting from ±-haloketones. The structure of the imidazole-2-thiones were studied with NMR techniques. Further reactions were performed using the imidazole-2-thiones as starting material.
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Abstract Die Umsetzungen von Imidazol (I) mit den Diazoestern (II) und (IV) in Gegenwart von Kupferbronze wird untersucht.
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Imidazole
Benzimidazole
Nitroso
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A strategy for the stepwise annulation of pyrrolic rings of a porphyrin to imidazole rings is presented. Mono(imidazole), Janus and corner bis(imidazole), T-shaped tris(imidazole), and tetrakis(imidazole) porphyrins have been synthesized and characterized.
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Low-temperature studies of the simple variously substituted imidazole types 4-phenyl-1H-imidazole, C9H8N2, 1-benzyl-1H-imidazole, C10H10N2, and 1-mesityl-1H-imidazole, C12H14N2, extend comparisons between parent imidazole species and their derivatives, the pronounced double-bond localization opposite the substituted N atom common to simple neutral species being redistributed aromatically on protonation.
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