779-84-0Relevant articles and documents
Colorimetric and fluorescence sensing of fluoride anions with potential salicylaldimine based schiff base receptors
Sivakumar, Radhakrishnan,Reena, Vijayaragavan,Ananthi, Nallamuthu,Babu, Muthiya,Anandan, Sambandam,Velmathi, Sivan
, p. 1146 - 1151 (2010)
Salicylaldimine based schiff base receptors with different substituents showing fluorescent enhancement in the presence of fluoride anion was visualized through naked eye as well as by change in spectral properties (UV-vis and fluorescent techniques). The reason for such fluorescence enhancement may be due to hydrogen bond interaction between receptor recognition site and fluoride anion. Such a hydrogen bond interaction creates a six-membered transition state, which avoids quenching processes. To support this, fluorescence enhancement factor (FEF) was calculated and it was found to be more (FEF = 652) for -NO2 substituted receptor compared to other receptors.
On the formation of imines in water-a comparison
Saggiomo, Vittorio,Lüning, Ulrich
, p. 4663 - 4665 (2009)
The reaction of aniline with aryl aldehydes in water has been investigated in the past, but contradictory results have been published. While only small amounts of imines 3 were detected by NMR analysis, isolation afforded high imine yields. A reinvestigat
Redox-active copper triangles as an enzymatic molecular flask for light-driven hydrogen production
Zhao, Liang,Wei, Jianwei,Zhang, Feili,He, Cheng,Zheng, Sijia,Duan, Chunying
, p. 48989 - 48993 (2017)
A positively charged redox-active metal-organic triangle containing three redox-active copper centres was developed to encapsulate anionic organic dyes (fluorescein) through a weak host-guest interaction for photocatalytic hydrogen production. The unique
Synergistic extraction of nickel(II) from a sulfate medium by a mixture of N-(2-hydroxybenzylidene)aniline and methyl–isobutyl ketone
Almi,Adjel,Barkat
, p. 1577 - 1584 (2017)
The synergistic solvent extraction of nickel(II) from a sulfate medium with N-(2-hydroxybenzylidene)aniline in the absence and presence of Methyl–Isobutyl Ketone (MIBK) in chloroform at 25°C has been studied. A synergistic effect is observed for the metal
In-Situ Photochromism Switching with Crystal Jumping through the Deammoniation of N-Salicylideneaniline Ammonium Salt
Sugiyama, Haruki,Johmoto, Kohei,Sekine, Akiko,Uekusa, Hidehiro
, p. 4324 - 4331 (2019)
N-Salicylideneaniline (SA) derivatives are traditional organic photochromic compounds whose properties are closely related to their molecular conformations and crystal structures. We herein present the photochromic property switching phenomenon of SA ammonium salt crystals using a deammoniation reaction. The N-salicylidene-4-carboxyaniline ammonium salt crystal (1-Sα) was found to exhibit photochromism upon irradiation with UV light. Upon heating, 1-Sα desorbed ammonia gas and transformed into a nonionic SA crystal (1-N) with non-photochromic properties. Surprisingly, this phase transition induced the "jumping crystal" phenomenon. Thus, the crystal structures both before and after the phase transition were determined, and it was revealed that the switching phenomenon of photochromism (photochromism switching) was caused by the crystal structural and molecular conformational changes that took place upon deammoniation. In addition, 1-N reverted to 1-Sα by exposure to aqua-ammonia vapor for a few minutes. These results suggested that such SA crystals could be applicable as switching materials or chemical sensors.
A novel water-dispersible and magnetically recyclable nickel nanoparticles for the one-pot reduction-Schiff base condensation of nitroarenes in pure water
Ghamari Kargar, Pouya,Ravanjamjah, Asiye,Bagherzade, Ghodsieh
, p. 1916 - 1933 (2021/07/10)
In this work, a heterogeneous nanocatalyst called Ni-Fe3O4@Pectin~PPA ~ Piconal was first synthesized, which was investigated as a bifunctional catalyst containing nickel functional groups. On the other hand, this Ni-Fe3O4@Pectin~PPA ~ Piconal catalyst in aqueous solvents shows a very effective performance at ambient temperature for the nitroarene reduction reaction with sodium borohydride, for which NaBH4 is considered as a reducing agent. This is a novelty magnetic catalyst that was approved by various methods, including Fourier-transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRD), Dynamic light scattering (DLS), Transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), Inductively coupled plasma (ICP), Energy-dispersive X-ray spectroscopy (EDX), and Field emission scanning electron microscopy (FESEM) analyses. From the satisfactory results obtained from the reduction of nitrogen, this catalytic system is used for a one-pot protocol containing a reduction-Schiff base concentration of diverse nitroarenes. It was corroborated with the heterogeneous catalytic experiments on the one-pot tandem synthesis of imines from nitroarenes and aldehydes. Finally, the novel Ni-Fe3O4@Pectin~PPA ~ Piconal catalyst could function as a more economically desirable and environmentally amicable in the catalysis field. The favorable products are acquired in good to high performance in the attendance of Ni-Fe3O4@Pectin~PPA ~ Piconal as a bifunctional catalyst. This catalyst can be recycled up to six steps without losing a sharp drop.
Spectroscopic identification of hydrogen bond vibrations and quasi-isostructural polymorphism in n-salicylideneaniline
Hetmańczyk, ?ukasz,Goremychkin, Eugene A.,Waliszewski, Janusz,Vener, Mikhail V.,Lipkowski, Pawe?,Tolstoy, Peter M.,Filarowski, Aleksander
, (2021/08/30)
The ortho-hydroxy aryl Schiff base 2-[(E)-(phenylimino)methyl]phenol and its deutero-derivative have been studied by the inelastic incoherent neutron scattering (IINS), infrared (IR) and Raman experimental methods, as well as by Density Functional Theory
