3785-03-3Relevant academic research and scientific papers
Reaction Acceleration Promoted by Partial Solvation at the Gas/Solution Interface
Qiu, Lingqi,Wei, Zhenwei,Nie, Honggang,Cooks, R. Graham
, p. 1362 - 1365 (2021/09/14)
The kinetics of organic reactions of different types in microvolumes (droplets, thin films, and sealed tubes) show effects of gas/solution interfacial area, reaction molecularity and solvent polarity. Partial solvation at the gas/solution interface is a major contributor to the 104-fold reaction acceleration seen in bimolecular but not unimolecular reactions in microdroplets. Reaction acceleration can be used to manipulate selectivity by solvent choice.
Perovskite solar cell additive based on cyanopyridine ionic liquid and applications thereof
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Paragraph 0037-0040, (2020/03/09)
The invention relates to a perovskite solar cell additive based on a cyanopyridine ionic liquid and applications thereof. The chemical structural formula of the additive is represented in the description, in the formula, n represents an integer from 0 to 9; and Z represents Br, I, Cl, BF4, PF6, or TFSI. A special chemical structure is designed so that a cyano group is connected to a pyridine ring;due to the strong polarity of the cyano group, the morphology of a perovskite film can be controlled during the growth process, the prepared grains have a greater size; at the same time, due to the synergistic effect between the cyano group and pyridine cations, the internal defects in the perovskite film are reduced; and the prepared perovskite film has a very good fluorescent property.
Tandem dinucleophilic cyclization of cyclohexane-1,3-diones with pyridinium salts
Kiamehr, Mostafa,Moghaddam, Firouz Matloubi,Mkrtchyan, Satenik,Semeniuchenko, Volodymyr,Supe, Linda,Villinger, Alexander,Langer, Peter,Laroshenko, Viktor O.
supporting information, p. 1119 - 1126 (2013/07/19)
The cyclization of cyclohexane-1,3-diones with various substituted pyridinium salts afforded functionalized 8-oxa-10-aza-tricyclo[7.3.1.0 2,7]trideca-2(7),11-dienes. The reaction proceeds by regioselective attack of the central carbon atom of t
Pyridinium salts - Versatile reagents for the regioselective synthesis of functionalized thiazocino[2,3-b]indoles by tandem dinucleophilic reactions of thiooxindoles
Kiamehr, Mostafa,Gormay, Pavel V.,Villinger, Alexander,Langer, Peter,Iaroshenko, Viktor O.,Moghaddam, Firouz Matloubi,Semeniuchenko, Volodymyr
supporting information, p. 9685 - 9693,9 (2020/08/20)
The reaction of thiooxindoles with various 2- and 3-substituted pyridinium salts afforded a variety of functionalized thiazocinoindoles. The products have been prepared in good to excellent yields by regioselective dinucleophilic C/S-cyclocondensation of
Efficient macrocyclization achieved via conformational control using intermolecular noncovalent π-cation/arene interactions
Bolduc, Philippe,Jacques, Alexandre,Collins, Shawn K.
supporting information; experimental part, p. 12790 - 12791 (2010/11/04)
Quinolinium salt 3 is an effective additive that acts as a conformation control element (CCE) to promote macrocyclization to form rigid cyclophanes via olefin metathesis or Glaser-Hay coupling, which do not cyclize in the absence of the additive. The additives are easily synthesized and highly modifiable and have solubility profiles which allow for simple recovery via filtration.
Excellent correlation between substituent constants and pyridinium N-methyl chemical shifts
Huang, Sha,Wong, Jesse C.S.,Leung, Adam K.C.,Chan, Yee Man,Wong, Lili,Fernendez, Myrien R.,Miller, Amanda K.,Wu, Weiming
experimental part, p. 5018 - 5020 (2009/12/01)
Substituents on the pyridinium ring of N-methylpyridinium derivatives, especially those on the 2- or 4-position, have a large effect on the 1H and 13C NMR chemical shifts of the N-methyl group. Reasonable correlations between the chemical shift changes and the resonance substituent constants are observed. The dual substituent parameter approach provides an excellent correlation when a combination of polar and resonance substituent constants is employed.
Shape-Selective Assemblies of Charge-Transfer Complexes as Molecular Probes for Water Adsorption in Zeolites
Yoon, K. B.,Huh, T. J.,Kochi, J. K.
, p. 7042 - 7053 (2007/10/02)
The supercage of zeolite-Y and the restricted channels of zeolite-L, mordenite, and mazzite act as shape-selective hosts to a series of brightly colored charge-transfer complexes +, D> assembled in situ by the intercalation of various aromatic donors (D) into the ion-exchanged (colorless) zeolites with different pyridinium acceptors (A+).Upon the deliberate introduction of water (vapor) into the variously colored zeolites, the diffuse reflectance spectra suffer pronounced spectral shifts of the charge-transfer bands, the magnitude of ΔhνCT being uniquely dependent on the molecular size/shape of A+ and D, as well as the dimensions of the zeolite cavities.In accordance with the bond compression model of intermolecular charge-transfer complexes, the bathochromic shifts to lower energies (+ΔhνCT) are ascribed to hyperbaric effects induced by the absorption of water within the constricted channels of zeolite-L, mordenite, and mazzite (but not in the larger supercage of zeolite-Y).The importance of water coordination is also underscored by the unusual hypsochromic effects (-ΔhνCT) that are observed when cyano-substituted pyridinium acceptors o-CP+ and p-CP+ are doped into zeolite-Y (but not into zeolite-L, mordenite, or mazzite).These results thus show that the intermolecular charge-transfer complexes +, D> are shape-selective and can be used as quantitative visual probes for water absorption into zeolite cavities, and they provide the experimental basis for further theoretical analysis.
An Electron Spin Resonance and Voltametric Investigation of Some 2-Mono- and 2,4-Di-substitued Pyridinyl Radicals
Greci, Lucedio,Alberti, Angelo,Carelli, Italo,Trazza, Antonio,Casini, Antonio
, p. 2013 - 2018 (2007/10/02)
The chemical reduction of some 2-monosubstitued and 2,4-disubstitued pyridinium ions has been investigated by means of e.s.r. spectroscopy and the result compared with those of an electrochemical study on the same species.By combining the electrochemical and e.s.r. data, a scale of stability has been determined for the investigated pyridinyl radicals.N-Methyl-2-cyanopyridinyl, wich was found to be too unstable to be observed, eventually evolved to the 2,4-dicyano-substitued radical.E.s.r. studies have also been carried out on the structurally similar, although more persistent, N-germylpyridinyls.
