126979-44-0Relevant articles and documents
Csp3-H bond activation with triel metals: Indium and gallium zwitterions through internal hydride abstraction in rigid salan ligands
Maudoux, Nicolas,Fang, Jian,Roisnel, Thierry,Dorcet, Vincent,Maron, Laurent,Carpentier, Jean-Francois,Sarazin, Yann
, p. 7706 - 7717 (2014)
The hydropyrimidine salan (salan=N,N'-dimethyl-N,N'-bis[(2-hydroxyphenyl) methylene]-1,2-diaminoethane) proteo-ligands with a rigid backbone {ON^(CH 2)^NO}H2 react with M(CH2SiMe3) 3 (M=Ga, In) to yie
A theoretical insight on the rigid hydrogen-bonded network in the solid state structure of two zinc(ii) complexes and their strong fluorescence behaviors
Banerjee, Snehasis,Basak, Tanmoy,Chattopadhyay, Shouvik,Mondal, Ipsita
, p. 3005 - 3019 (2020/05/18)
A reduced Schiff base has been synthesized and characterized and used as a fluorescence chemo-sensor for the selective detection of zinc(ii). Fluorescence titrations have also been conducted for the ligand and the binding constant for the ligand (K= 1.056 × 106M?1) has been evaluated using the Benesi-Hildebrand equation. Two mononuclear zinc(ii) complexes have also been synthesized with the ligand andS0andS1of their electronic structures were calculated. The HOMO-LUMO energy difference in each complex isca.4.69 eV inS0states and the energy gap is reduced toca.4.3 eV inS1facilitating easier electronic transition. Their strong fluorescence behaviors may be correlated with the presence of a rigid hydrogen-bonded network in their solid state structure. Two types of intermolecular hydrogen bonding are noticed in the dimeric form of the complexes. The hydrogen bonding environment is well supported qualitatively and quantitatively with the help of NCI-RDG (noncovalent interaction reduced density gradient) and QTAIM. The physical nature of other weak non-covalent interactions in both complexes was also examined. Based on the optimized ground state geometry (S0), the TDDFT/B3LYP method combined with the SMD solvation model in methanol media was used to calculate the absorption properties of the investigated complexes. Additionally, analysis on the electronic structure of the excited states employing NTO (natural transition orbital) representation showed that theS1state can be mainly characterized by an inter-ligand charge-transfer (ILCT) transition, populating the highest-occupied (HO) NTO and lowest-unoccupied (LU) NTO, which describe the hole and the excited electron state, respectively. The calculation indicates that the fluorescence originates from the charge transfer from N3/NCS to the reduced Schiff base.
An investigation of some Schiff base derivatives as chemosensors for Zn(II): The performance characteristics and potential applications
Ergun, Ece,Ergun, ümit,?leri, ?zgür,Kü?ükmüzevir, Muhammed Fatih
, p. 273 - 286 (2018/06/19)
The fluorescence properties of four simple Schiff bases (LH2, LDMH2, LH2 H and LDMHH2) and their potential application as chemosensors for the detection of zinc ion in aqueous solution have been investigated. While LH2 and LDMH2 have displayed specific recognition to Zn(II), the reduced derivatives (LH2 H and LDMHH2) of these ligands have shown no fluorescence response due to the lack of C[dbnd]N group. The Job plots, fluorescence titration experiments and ESI-MS results indicate the formation of 1:1 complexes between sensors and Zn(II). The analytic methods based on LH2 and LDMH2 as chemosensors have been proposed and optimized to detect Zn(II) ions in aqueous solution. The optimized methods have shown a good range of linearity, high precision, good accuracy and low detection limit. As an alternative to these methods, LH2 and LDMH2 have the capability to detect Zn(II) ions by naked eye under UV lamp. Moreover, LH2-Zn and LDMH2-Zn complexes have the ability to be a staining agent for identifying the radiation treatment of food by DNA comet assay.
Thermal decomposition of new mononuclear NiII complexes with ONNO type reduced Schiff bases and Pseudo halogens
Ates, B. Meltem,Zeybek, Buelent,Aksu, Mecit,Ergun, Uemit,Ercan, Filiz,Aksu, M. Levent,Atakol, Orhan
experimental part, p. 840 - 845 (2010/09/04)
Mononuclear nickel(II) complexes were prepared by reaction, of the three ONNO type reduced Schiff bases bis-N,N'-(2-hydroxybenzyl)-1,3-propanediamine (LHH2), bis-N,N'-(2-hydroxybenzyl)-2,2′-dimethyl-1, 3-propanediamine (LDMHH2), and bis-N,N'-[1-(2- hydroxyphenyl)ethyl]-1,3-propanediamine (LACHH2) with NiII ions in the presence of pseudo halides (OCN-, SCN- and N3-). The complexes were characterized with the use of elemental analyses, IR spectroscopy, and thermal analyses. The molecular structure of one of the complexes was obtained by single-crystal X-ray diffraction. The obtained complexes are mononuclear, and a pseudo halide molecule is attached. One of the oxygen atoms of the ligand is in phenolate and the other was in phenol form. According to the thermogravimetry results, it was thought that the pseudo halide thermally detaches from the structure as hydropseudo halide. In azide-containing complexes an endothermic reaction was observed although the azide group usually decomposes with an exothermic reaction.
The dimeric complex {2,2′-[2,2-dimethyl-1,3-propanediylbis(aminomethyl)]diphenolato-N,N′ ,O,O′}copper(II) ethanol solvate
Yao, Hsueh-Hua,Chen, Bor-Hann,Lo, Jem-Mau,Liao, Fen-Ling
, p. 1222 - 1224 (2007/10/03)
The title complex, [Cu(C19H24N2O2)]2.2C 2H5OH, is a centrosymmetric dimer. Each Cu atom is coordinated by two N and two O atoms from the amine-phenol ligand in a distorted square
