45497-73-2Relevant articles and documents
A fluorescence quenching sensor for Fe3+ detection using (C6H5NH3)2Pb3I8·2H2O hybrid perovskite
Zhu, Meng-Ya,Zhang, Le-Xi,Yin, Jing,Chen, Jing-Jing,Bie, Li-Jian
, (2019)
A new organic-inorganic hybrid perovskite (C6H5NH3)2Pb3I8·2H2O single crystal has been synthesized through a facile solution method. In this perovskite, there exists a 1D infinite lead iodide chains constituted by Pb3I8 groups, which is surrounded by anilines. As an active fluorescence quenching sensor material, this perovskite shows excellent performance for Fe3+ detection in N, N-dimethylformamide (DMF) solution with a detection limit of 1.0 × 10?7 mol/L, including short response time, high sensitivity and high selectivity. The sensitivity and selectivity towards Fe3+ is much higher than that towards other metal cations, which provides a facile way for detecting Fe3+ cations in solution. Electron paramagnetic resonance (EPR) confirms that the mechanism of fluorescence quenching can be attributed to Fe3+ inhibition to the radiative electron-hole recombination via capturing electrons.
EFFECT OF THE NATURE OF THE LEAVING GROUP IN REACTIONS OF 2-X-N-ETHYLPYRIDINIUM SALTS WITH AMINES IN ACETONITRILE
Titskii, G. D.,Mitchenko, E. S.
, p. 1949 - 1954 (2007/10/02)
The rate-determining stage in the nucleophilic substitution reactions of 2-X-N-ethylpyridinium salts with piperidine in acetonitrile changes, depending on the nature of the leaving group X.In the case where X = Hlg the controlling stage is the formation of the C-N bond.When X = 4-NO2C6H4O3, 3,4-(NO2)2C6H3O, and 2,6-(NO2)2C6H3O, nucleophilic substitution at the carbon atom is controlled by cleavage of the C-X bond.Nucleophilic substitution at a carbon atom of the benzene ring predominates in the reaction of 2-(2,4-dinitrophenoxy)-N-ethylpyridinium salt with piperidine.
NICKEL-CATALYZED AMIDATION OF BROMO- AND IODOBENZENE
Giannoccaro, Potenzo,Pannacciulli, Emiliano
, p. 119 - 128 (2007/10/02)
The carbonylation of aryl halides in the presence of p-RC6H4NH2 (R = H, CH3, Cl) or C6H5NHR (R = CH3, C2H5) and a catalytic amount of a nickel(II) or nickel(0) tertiary phosphine complex at 150 degC or above under carbon monoxide pressures is reported.Amides were obtained in high yields in reactions with p-RC6H4NH2, but with C6H5NHR compounds the expected N-alkyl benzanilides were not formed, benzanilide in low yield being formed instead.A possible catalytic cycle based on an active Ni(0)-carbonyl complex is suggested, and the observed deactivation of the catalytic system when the carbon monoxide pressure falls to 6 atm or below, is accounted for in terms of a side reaction which produces an inactive Ni(II) compound.
