4434-23-5Relevant academic research and scientific papers
Photochromism of polymorphic 4,4′-methylenebis-(N-salicylidene-2,6-diisopropylaniline) crystals
Taneda, Masatsugu,Amimoto, Kiichi,Koyama, Hiroyuki,Kawato, Toshio
, p. 499 - 504 (2004)
4,4′-Methylenebis(N-salicylidene-2,6-dialkylaniline) derivatives were prepared and their structures were determined by 1H NMR, IR, DSC and X-ray crystallographic analyses. The 2,6-diisopropylaniline derivative yielded definite polymorphic cryst
A Schiff base complex of Zn(II) as a neutral carrier for highly selective PVC membrane sensors for the sulfate ion
Shamsipur,Yousefi,Hosseini,Ganjali,Sharghi,Naeimi
, p. 2869 - 2874 (2001)
Novel polymeric membrane (PME) and coated graphite (CGE) sulfate-selective electrodes based on a recently synthesized Schiff base complex of Zn(II) were prepared. The electrodes reveal a Nernstian behavior over wide SO42- ion concent
Preparation and Characterization of poly(Azomethines) Containing Ether and Methylene Bridges: Photophysical, Electrochemical, Conductivity and Thermal Properties
Kaya, ?smet,Y?lmaz, Tahsin
, p. 379 - 389 (2017)
In this paper, a series of polyazomethines (PAZs) were prepared using dihydroxy substituted Schiff bases and 1,4-diiodobenzene. Also, different group effect such as methylene carbon and etheric oxygen bridges on photophysical, electrochemical, conductivit
Synthesis of new bis-bidendate N/O spiro-bino-spiro-cyclotriphosphazenes: Structural investigations and DFT studies
Süzen, Yasemin,Metino?lu, Simge,Ashoor, Salem El-Tohami
, p. 118 - 128 (2017)
The Schiff bases 4,4’-di(2-hydroxybenzyl imino) diphenylmethane (S1), 4,4’-di(2-hydroxy-5-chloro benzyl imino) diphenylmethane (S2) and 4,4’-di(2-hydroxy-5-bromo benzyl imino) diphenylmethane (S3) were synthesized from the condensation reactions of salicyl-aldehyde, 5-chlorosalicylaldehyde and 5- bromosalicylaldehyde, respectively, with 4,4’-diaminodiphenylmethane and reduced with NaBH4in dry MeOH to obtain N/O-donor type ligands 4,4’-di(2-hydroxy benzyl amino) diphenylmethane (L1), 4,4’- di(2-hydroxy-5-chloro benzyl amino) diphenylmethane (L2) and 4,4’-di(2-hydroxy-5-bromo benzyl amino) diphenylmethane (L3). The novel spiro-bino-spiro-cyclotriphosphazene derivatives 1 – 3were obtained from the reactions of L1-L3 with trimer (N3P3Cl6). The identities of these compounds were elucidated by31P-,1H-,13C-NMR, FT-IR spectroscopy and elemental analysis. The solid state structures of compounds 1 and 2 were determined by single crystal X-ray diffraction. Experimental results on the molecular structures of compounds 1 and 2 were supported by computational studies using Density Functional Theory (DFT) methods with Becke-3-Lee–Yang–Parr (B3LYP) functional and 6–31+G(2d,p) basis set. The experimentally determined values of the bond angles and bond lengths in the compounds are in accord with to those predicted theoretically.
Salicylaldimine-bridged dinuclear cyclopalladated complexes: Synthesis, characterization and BSA binding studies
Gao, Yan,Zhang, Saimeng,Li, Xiaoguang,Jiang, Shuyao,Yang, Yajing,Chang, Xiaohong
, (2019/12/24)
Salicylaldimine-bridged dinuclear cyclopalladated complexes were synthesized by the reactions of cyclopalladated chloro dimers [Pd{(4-R)C6H3CH=N-C6H3–2,6-i-Pr2}(μ-Cl)]2 (R = H; OMe) with sa
Selective and sensitive fluorescence recognition of Pb(II) in aqueous medium by organic nanoparticles of a urea linker based tetrapodal receptor: Effect of linker molecules in a sensor on chemosensing
Mishra, Jayanti,Kaur, Navneet,Ganguli, Ashok K.
, p. 214 - 220 (2019/01/03)
Tetrapodal framework based two compounds P and R were synthesized bearing two urea and thiourea moieties respectively. The organic nanoparticles (ONPs) were produced from P and R by re-precipitation method and their recognition behavior was studied by inv
Synthesis of benzo fused dioxadiazasilamacrocycles via remote dianion cyclization
Singh, Shweta,Verma, Rajiv Kumar,Raghuvanshi, Keshav,Singh, Maya Shankar
, p. 6889 - 6892 (2013/01/15)
An efficient and facile protocol for the synthesis of hitherto unreported benzo fused dioxadiazasilamacrocycles has been developed by intermolecular nucleophilic substitution of remote dianions generated in situ from symmetric and unsymmetric Schiff base
Design of postmetallocene Schiff base-like catalytic systems for polymerization of olefins: XII. Synthesis of tetradentate bis-salicylaldehyde imine ligands
Oleinik,Oleinik,Ivanchev,Tolstikov
experimental part, p. 528 - 535 (2009/08/17)
Reactions of salicylaldehyde, 3-tert-butylsalicylaldehyde, and 3,5-di-tert-butylsalicylaldehyde with 1,4-diaminobutane, 1,6-diaminohexane, 4,4′-diaminodiphenylmethane, 4,4′-diamino-3,3′,5,5′- tetramethyldiphenylmethane, 4,4′-diamino-5,5′-dicyclopentyl-3, 3′-dimethyldiphenylmethane, 4,4′-diamino-5,5′-dicyclohexyl-3, 3′-dimethyldiphenylmethane, bis(4-aminophenyl) sulfone, o,o′- and p,p′-diaminodiphenyl ethers, 1,4-bis(4-aminophenoxy)benzene, 2,2-bis[4-(4-aminophenoxy) phenyl]propane, and 4,4″-diamino-p-terphenyl gave a series of the corresponding Schiff bases which can be used as tetradentate ligands for the synthesis of titanium and zirconium complexes.
NOVEL DINUCLEAR TRANSITION METAL COMPOUND, CATALYST COMPOSITION COMPRISING THE SAME, METHOD OF PREPARING OLEFIN POLYMER, AND OLEFIN POLYMER PRODUCED USING THE METHOD
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Page/Page column 16-17, (2010/11/27)
A dinuclear transition metal compound is provided. The dinuclear transition metal compound includes two transition metal compounds connected each other by a bridging group so that a decrease in catalyst activation due to a polar functional group can be pr
Kinetics and reaction mechanism of the metal ion catalysed hydrolysis of some substituted salicylanils
Prabhu,Lalitha,Laxmeshwar
, p. 1103 - 1109 (2007/10/03)
A kinetic study of the hydrolysis of the imines, salicylanil, its methyl and chloro derivatives and N,N′-disalicylidene-p,p′-diamino diphenyl methane has been done in the pH range 2.20-12.65 in the temperature range 25-55°C. The comparative rates of hydrolysis are in the sequence, salicylanil > meta > para > ortho and salicylanil > N,N′-disalicylidene-p,p′-diamina diphenyl methane. The synthesis of N,N′-disalicylidene-p,p′-diamino diphenyl methane and its characterisation by IR, NMR and mass has been reported. Suitable reaction mechanisms have been suggested for the hydrolysis in acidic, neutral and basic media based on pK1 values of the imines, steric hindrance, inductive effect, resonance and mesomeric effects. The catalytic effect of the transition metal ions, NiII CuII and ZnII on the hydrolysis of the imines has been investigated in detail in the temperature range 30-45°C. The hydrolysis is accelerated as per the sequence Ni II > ZBII > CuII which is in accordance with the Irving and William's order of stability constants of metal chelates involving nitrogen anil oxygen donor ligands. The retardation of the rate at lower CuII concentrations has been attributed to the Jahn-Teller distortion of the metal-complex to achieve stability. From the effect of temperature on the rates of hydrolysis of the imines, the thermodynamic activation parameters have been calculated.
