1159-53-1Relevant articles and documents
Urea as ammonia equivalent in aryl halides amination catalyzed by palladium complexes
Artamkina,Sergeev,Shtern,Beletskaya
, p. 1683 - 1689 (2006)
Urea reaction with nonactivated aryl bromides and chlorides under catalysis with palladium complexes led to the formation in 65-95% yield of triarylamines from para-and meta-substituted aryl halides and of diarylamines from ortho-isomers.
Measurement and prediction of solubility of four arylamine molecules in benzene, hexane, and methanol
Manifar, Touraj,Rohani, Sohrab
, p. 1794 - 1800 (2005)
In this paper, the solubility of selected arylamine molecules in methanol, hexane, and benzene has been investigated. Solubility of mmmTTA in hexane and benzene is the highest while mTTA has the lowest solubility in benzene and hexane. The UNIFAC and the UNIQUAC binary adjustable parameters have been determined. On the basis of these parameters, the solubility of these molecules has been predicted and compared with the experimental data. The effect of meta or para substitutions in arylamine molecules on their solubility in organic solvents was experimentally determined and theoretically established. The adjustable parameters of the UNIFAC equation obtained in this study will help estimate the solubility of macromolecules with the same constitutional groups or estimate the solubility of mixture of arylamine molecules. Thermal properties such as specific heat, melting point, boiling point, and heat of vaporization of the selected arylamine molecules have been determined.
Sensitive and Repeatable Photoinduced Luminescent Radicals from A Simple Organic Crystal
Mu, Yingxiao,Liu, Yanyan,Tian, Haiyan,Ou, Depei,Gong, Li,Zhao, Juan,Zhang, Yi,Huo, Yanping,Yang, Zhiyong,Chi, Zhenguo
, p. 6367 - 6371 (2021)
Photoinduced organic radicals are important for chemical and physical processes of organic materials, which are extensively investigated and applied in organic synthesis, photoelectronic devices and biotechnology. However, there are rare reports of the luminescence for these photoinduced radicals, especially in the condensed state. Herein, an unexpected and interesting luminescent radical is described, which can be rapidly and reversibly generated from a simple organic crystal by gentle light irradiation in air. It was revealed that the twist and asymmetric conformation of isolated molecule in its crystal with only weak C?H???π intermolecular interactions, which led to the generation of such photoinduced luminescent radicals. In addition, dual-channel photosensitive device with rapid response and well repeatability can be obtained based on the thin film of this organic crystal, showing both photoswitching on luminescence and conducting.
C-H activation and nucleophilic substitution in a photochemically generated high valent iron complex
Lim, Jia Hui,Engelmann, Xenia,Corby, Sacha,Ganguly, Rakesh,Ray, Kallol,Soo, Han Sen
, p. 3992 - 4002 (2018)
The photochemical oxidation of a (TAML)FeIII complex 1 using visible light generated Ru(bpy)33+ produces valence tautomers (TAML)FeIV (1+) and (TAML+)FeIII (1-TAML+), depending on the exogenous anions. The presence of labile Cl- or Br- results in a ligand-based oxidation and stabilisation of a radical-cationic (TAML+)FeIII complex, which subsequently leads to unprecedented C-H activation followed by nucleophilic substitution on the TAML aryl ring. In contrast, exogenous cyanide culminates in metal-based oxidation, yielding the first example of a crystallographically characterised S = 1 [(TAML)FeIV(CN)2]2- species. This is a rare report of an anion-dependent valence tautomerisation in photochemically accessed high valent (TAML)Fe systems with potential applications in the oxidation of pollutants, hydrocarbons, and water. Furthermore, the nucleophilic aromatic halogenation reaction mediated by (TAML+)FeIII represents a novel domain for high-valent metal reactivity and highlights the possible intramolecular ligand or substrate modification pathways under highly oxidising conditions. Our findings therefore shine light on high-valent metal oxidants based on TAMLs and other potential non-innocent ligands and open new avenues for oxidation catalyst design.
C60 as a Photocatalyst of Electron-Transfer Processes: Reactions of Triplet C60 with Chloranil, Perylene, and Tritolylamine Studied by Flash Photolysis and FT-EPR
Steren, Carlos A.,Willigen, Hans van,Biczok, Laszlo,Gupta, Neeraj,Linschitz, Henry
, p. 8920 - 8926 (1996)
Photoprocesses in benzonitrile solutions of C60 and chloranil (CA) have been studied by complementary techniques of nanosecond laser photolysis and Fourier transform EPR.Direct oxidation of 3C60 by CA is slow (k = (2.0 +/- 0.3)E7 M-1 s-1), consistent with the high oxidation potential of 3C60.However, the formation rate and yield of CA(1-) are much increased by addition of perylene (Pe) or tritolylamine (TTA) via the fast reactions 3C60 + Pe -> C60 + 3Pe, followed by 3Pe + CA -> Pe(1+) + Ca(1-), or 3C60 +TTA -> C60(1-) + TTA(1+), followed by C60(1-) + CA -> C60 + CA(1-).These reactions utilize the broad absorption and initial high triplet yield of C60, as well as the low oxidation potential of 3Pe or high reduction potential of 3C60, to catalyze efficient formation of CA(1-) and enhance separation of radicals.Triplet C60 also reacts with Pe by electron transfer, forming Pe(1+) and C60(1-) with rate one-third that of energy transfer.However, the Ca(1-) formed in the Pe-catalyzed reaction is strongly spin-polarized, indicating that it is formed primarily via the 3Pe pathway.The extinction coefficient of C60(1-) at 1080 nm is measured (ε = 18300 +/- 1100 M-1 cm-1) using the TTA reaction.
Mixed er-NHC/phosphine Pd(ii) complexes and their catalytic activity in the Buchwald-Hartwig reaction under solvent-free conditions
Ageshina, Alexandra A.,Sterligov, Grigorii K.,Rzhevskiy, Sergey A.,Topchiy, Maxim A.,Chesnokov, Gleb A.,Gribanov, Pavel S.,Nechaev, Mikhail S.,Asachenko, Andrey F.,Bermeshev, Maxim V.,Melnikova, Elizaveta K.
supporting information, p. 3447 - 3452 (2019/04/30)
A series of novel (NHC)PdCl2-PR3 complexes were synthesized and fully characterized by 1H, 13C, 31P NMR and FT-IR spectroscopy. These complexes showed high catalytic activity toward solvent-free Buchwald-Hartwig amination. Both primary and secondary amines were efficiently utilized under the same reaction conditions. The solvent-free synthesis of valuable N-aryl carbazoles and similar N-heterocyclic systems was described.
