scholarly journals Synthesis, X-ray Structure and Evaluation of Bactericidal Activity of an o-vanillin Functionalized Schiff Base

2021 ◽  
Author(s):  
Prafullya Kumar Mudi ◽  
Smriti Pradhan ◽  
Amrita Sahu ◽  
Dipanwita Saha ◽  
Bhaskar Biswas
Keyword(s):  
Schiff Base ◽  
Bactericidal Activity ◽  
Pathogenic Bacteria ◽  
Biological Activities ◽  
The Self ◽  
Supramolecular Architecture ◽  
Azomethine Group ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Methoxy Groups

The present study reports the synthesis, crystal structure and evaluation of biological activities of a Schiff base, [L = (Z)-2-methoxy-6-(((2-methoxyphenyl) imino) methyl) phenol]. X-ray structure of Schiff base reveals that the compound crystallizes in the orthorhombic system with Pca space group. The Schiff base adopts two methoxy groups, one phenolic-OH and one azomethine group and exists in a Z-stereomer. Investigation on the self-assembled structure of the Schiff base exhibits the formation of a 3D supramolecular architecture through intermolecular O...H hydrogen bonding interactions. The bactericidal activity of the Schiff base has been examined against some pathogenic bacteria.

Syntheses, Structures, Thermal and Photoluminescence Properties of Two Zn(II) and Cd(II) Coordination Polymers Constructed from Taurine-derived Schiff Base and 4,4’-Bipyridine Ligands

2012 ◽  
Vol 67 (8) ◽  
pp. 774-782 ◽  
Author(s):  
Wei-Ting Guo ◽  
Zhi-Min Miao ◽  
Yun-Long Wang
Keyword(s):  
Schiff Base ◽  
Coordination Polymers ◽  
Tridentate Ligand ◽  
Supramolecular Architecture ◽  
Photoluminescence Properties ◽  
X Ray Diffraction ◽  
Monodentate Ligand ◽  
Metal Centers ◽  
X Ray ◽  
Ethanesulfonic Acid

Two chain-like coordination polymers, namely, {[Zn(saes)(4,4'-bipy)(H2O)]·H2O}n (1) and {[Cd (Hsaes)2(4,4'-bipy)(H2O)2]·2H2O}n (2), where H2saes=2-(2-hydroxybenzylideneamino)ethanesulfonic acid and 4,4'-bipy=4,4'-bipyridine, have been synthesized and characterized by singlecrystal X-ray diffraction, IR spectroscopy, elemental, thermogravimetric and photoluminescence analysis. X-Ray diffraction analyses indicate that 1and 2display octahedral metal centers with N3O3 and N2O4 donor sets, respectively. The Schiff base serves as a common N,O'-tridentate ligand in 1, and as a unique O-monodentate ligand in 2. In the crystal, both 1and 2form a 3D supramolecular architecture by O-H···O, C-H···O interactions or π···π stacking. The thermal and solid-state photoluminescence properties of both complexes have been investigated

scholarly journals A review on versatile applications of novel Schiff bases and their metal complexes

2019 ◽  
Vol 8 (4) ◽  
pp. 675-681
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Schiff Bases ◽  
Carbonyl Compounds ◽  
Biological Activities ◽  
Schiff Base Complexes ◽  
Amino Compound ◽  
Azomethine Group ◽  
Catalytic Activities ◽  
Schiff Base Metal Complexes

Metal complexes synthesized from Schiff bases and furthermore Schiff bases are versatile in nature. Such types of compounds were prepared from the condensation of an amino compound with carbonyl compounds (aldehyde or ketone) during which the carbonyl group is replaced by an imine or azomethine group. Schiff bases and their derivatives are widely employed in industries, polymers, dyes and medicative and pharmaceutical fields and additionally exhibit biological activities like antibacterial, antifungal, anti-inflammatory, antimalarial, antiviral, and antipyretic properties. Many Schiff base metal complexes exhibit glorious catalytic activities in numerous mechanisms. Their several applications in homogenous and heterogeneous catalysis were according troughout last decade. Several Schiff base complexes were helpful for their application as catalysts in reactions involving at high temperatures because of the high thermal and moisture stabilities. This text totally based on literature review with examples of the most promising applied Schiff bases and their complexes in several areas, summarizing the applications of Schiff bases and their numerous derivatives and complexes.

scholarly journals 2,2,6,6-Tetrabromo-3,4,4,5-tetramethoxycyclohexanone

2014 ◽  
Vol 70 (7) ◽  
pp. o826-o826
Author(s):  
Md. Serajul Haque Faizi ◽  
Ashraf Mashrai ◽  
M. Shahid
Keyword(s):  
Hydrogen Bonding ◽  
Schiff Base ◽  
Carbonyl Group ◽  
Title Compound ◽  
Chair Conformation ◽  
Molecular Bromine ◽  
Axis Direction ◽  
Compound C ◽  
Hydrogen Bonding Interactions ◽  
Methoxy Groups

In the title compound, C10H14Br4O5, synthesized from the methoxy Schiff baseN-(pyridin-2-ylmethyl)methoxyaniline and molecular bromine, the cyclohexanone ring has a chair conformation with one of the four methoxy groups equatorially orientated with respect to the carbonyl group and the others axially orientated. The C—Br bond lengthsvary from 1.942 (4) to1.964 (4) Å. In the crystal, weak C—H...Ocarbonylhydrogen-bonding interactions generate chains extending along theb-axis direction. Also present in the structure are two short intermolecular Br...Omethoxyinteractions [3.020 (3) and 3.073 (4) Å].

scholarly journals Self-Assembly of Antiferromagnetically-Coupled Copper(II) Supramolecular Architectures with Diverse Structural Complexities

Molecules ◽  
2020 ◽  
Vol 25 (23) ◽  
pp. 5549 ◽  
Author(s):  
Santokh S. Tandon ◽  
Scott D. Bunge ◽  
Neil Patel ◽  
Esther C. Wang ◽  
Laurence K. Thompson
Keyword(s):  
Schiff Base ◽  
Self Assembly ◽  
Three Dimensional ◽  
The Self ◽  
Basic Building Block ◽  
Schiff Base Ligands ◽  
X Ray ◽  
Supramolecular Architectures ◽  
Hydroxy Groups ◽  
New Discovery

The self-assembly of 2,6-diformyl-4-methylphenol (DFMP) and 1-amino-2-propanol (AP)/2-amino-1,3-propanediol (APD) in the presence of copper(II) ions results in the formation of six new supramolecular architectures containing two versatile double Schiff base ligands (H3L and H5L1) with one-, two-, or three-dimensional structures involving diverse nuclearities: tetranuclear [Cu4(HL2−)2(N3)4]·4CH3OH·56H2O (1) and [Cu4(L3−)2(OH)2(H2O)2] (2), dinuclear [Cu2(H3L12−)(N3)(H2O)(NO3)] (3), polynuclear {[Cu2(H3L12−)(H2O)(BF4)(N3)]·H2O}n (4), heptanuclear [Cu7(H3L12−)2(O)2(C6H5CO2)6]·6CH3OH·44H2O (5), and decanuclear [Cu10(H3L12−)4(O)2(OH)2(C6H5CO2)4] (C6H5CO2)2·20H2O (6). X-ray studies have revealed that the basic building block in 1, 3, and 4 is comprised of two copper centers bridged through one μ-phenolate oxygen atom from HL2− or H3L12−, and one μ-1,1-azido (N3−) ion and in 2, 5, and 6 by μ-phenoxide oxygen of L3− or H3L12− and μ-O2− or μ3-O2− ions. H-bonding involving coordinated/uncoordinated hydroxy groups of the ligands generates fascinating supramolecular architectures with 1D-single chains (1 and 6), 2D-sheets (3), and 3D-structures (4). In 5, benzoate ions display four different coordination modes, which, in our opinion, is unprecedented and constitutes a new discovery. In 1, 3, and 5, Cu(II) ions in [Cu2] units are antiferromagnetically coupled, with J ranging from −177 to −278 cm−1.

Syntheses and structural studies of η5-pentamethylcyclopentadienyl rhodium(III) and iridium(III) complexes of a Schiff-base expanded porphyrin

2010 ◽  
Vol 14 (01) ◽  
pp. 41-46 ◽  
Author(s):  
Luciano Cuesta ◽  
Vincent M. Lynch ◽  
Jonathan L. Sessler
Keyword(s):  
Schiff Base ◽  
Intramolecular Hydrogen Bonding ◽  
X Ray Diffraction ◽  
Nmr Studies ◽  
Coordination Environment ◽  
Metal Centers ◽  
X Ray ◽  
Hydrogen Bonding Interactions ◽  
Intramolecular Hydrogen ◽  
Expanded Porphyrin

Reported here is the synthesis of new binuclear rhodium(III) and iridium(III) semi-sandwich complexes of a Schiff-base expanded porphyrin. Single crystals of these new complexes were subject to X-ray diffraction analysis. The resulting structures revealed that the Schiff-base macrocycle adopts a V-shape in which two {(η5- C 5 Me 5) MCl } ( M = Rh and Ir ) fragments are accommodated within the macrocyclic pocket. The coordination environment of the metal centers is typical to that of "piano stool"-type complexes. The X-ray analyses and complementary NMR studies (carried out in CD 2 Cl 2) provide evidence for the existence of strong intramolecular hydrogen-bonding interactions between the pyrrolic NH protons and the chloride counteranion both in solution and in the solid state.

A New 2D Copper(II) Coordination Polymer with a Schiff Base Ligand with Weakly Coordinating Sulfonate Groups Affecting the Structure

2012 ◽  
Vol 67 (1) ◽  
pp. 11-16
Author(s):  
Jia-Ming Li ◽  
Kun-Huan He ◽  
Yi-Min Jiang
Keyword(s):  
Schiff Base ◽  
Thermogravimetric Analysis ◽  
Coordination Polymer ◽  
Schiff Base Ligand ◽  
Copper Complexes ◽  
Building Blocks ◽  
Supramolecular Architecture ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ethanesulfonic Acid

A new 2D copper(II) coordination polymer with the doubly deprotonated Schiff base ligand 2- (2-hydroxybenzylideneamino)ethanesulfonic acid (H2Saes) has been synthesized, {[Cu(Saes)(4,4´- bpy)]2·H2O}n (1), and characterized by single-crystal X-ray diffraction, IR spectroscopy, elemental and thermogravimetric analysis. Dinuclear copper complexes serve as secondary building blocks (SBUs) to construct an unusual coordination network with an interpenetrating CdSO4 topology. In the crystal, the components form a stable 3D supramolecular architecture by O-H· · ·O, C-H· · ·O interactions and π stacking.

Hydrogen-bonded supramolecular architecture in nonlinear optical ammonium 2,4-dinitrophenolate hydrate

2015 ◽  
Vol 48 (3) ◽  
pp. 844-852 ◽  
Author(s):  
A. Aditya Prasad ◽  
S. P. Meenakshisundaram
Keyword(s):  
Hydrogen Bonding ◽  
Single Crystal ◽  
Crystal Packing ◽  
Visible Region ◽  
Cutoff Wavelength ◽  
Supramolecular Architecture ◽  
X Ray Diffraction ◽  
Second Harmonic Generation Efficiency ◽  
X Ray ◽  
Hydrogen Bonding Interactions

Single crystals of ammonium 2,4-dinitrophenolate hydrate (ADH) were grown by the slow evaporation solution growth technique. The structure is elucidated by single-crystal X-ray diffraction analysis and the crystal belongs to an orthorhombic system with noncentrosymmetric space groupPna21. The second harmonic generation efficiency of ADH is superior to that of the reference material KH2PO4. The X-ray study reveals that molecules are associated by weak C—H...O, O—H...N, N—H...π and π–π stacking interactions, which are responsible for the formation and strengthening of the supramolecular assembly. Inter- and intramolecular hydrogen-bonding interactions support the supramolecular architecture in the crystal packing. Three different types of architecture,i.e.column-like packing, a sandwich model of packing and a cluster network type of infrastructure, are observed. Optical studies reveal that the absorption is minimum in the visible region and the cutoff wavelength is at ∼240 nm. The band-gap energy was estimated by the application of the Kubelka–Munk algorithm. The powder X-ray diffraction pattern reveals the good crystallinity of the as-grown specimen. Investigation of the intermolecular interactions and crystal packing using Hirshfeld surface analysis, based on single-crystal X-ray diffraction, reveals that the close contacts are associated with molecular interactions. Fingerprint plots of Hirshfeld surfaces were used to locate and analyze the percentage of hydrogen-bonding interactions.

scholarly journals Comparative Studies on Synthesis, Characterization and Antibacterial Properties between Schiff Base Co(II) Complex and Peroxo Complex

2020 ◽  
pp. 1-7
Author(s):  
Md. Mahasin Ali ◽  
Md. Nur Amin Bitu ◽  
Md. Saddam Hossain ◽  
Md. Faruk Hossen ◽  
Md. Ali Asraf ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Schiff Base ◽  
Metal Ion ◽  
Pathogenic Bacteria ◽  
Antibacterial Properties ◽  
Molar Conductance ◽  
Shigella Dysenteriae ◽  
Spectral Studies ◽  
Peroxo Complex ◽  
Azomethine Group

A new Schiff base Co(II) complex and - peroxo complex were synthesized and characterized by thin layer chromatography (TLC), elemental analyses, magnetic moment, conductivity measurements, UV-Vis., IR and ESI-MS spectral studies. The cobalt ion was participated in direct complexation with the Schiff base (SB) ligand derived from o-aminobenzoic acid and cinnamaldehyde during the single pot reaction. IR spectral data showed that the Schiff base ligand coordinated to the metal ion through nitrogen of azomethine group and oxygen of carboxyl group (COO-). The molar conductance values indicated that both the complexes are non-electrolytic in nature. Antibacterial activity of the complexes was tested against four pathogenic bacteria namely Staphylococcus aureus, Bacillus cereus, Escherichia coli & Shigella dysenteriae with standard Kanamycin-30. The results showed that both type of complexes have moderate to strong antibacterial activity and the peroxo complex is relatively more potential towards all the tested organisms.

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