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Wei BY, Cao CZ, Cao CT. Influences of polarizability effect of alkyl group and homoring competition effect of substituents on the NMR spectra of salen-type Schiff base. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:701-712. [PMID: 33403765 DOI: 10.1002/mrc.5131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 12/31/2020] [Accepted: 01/03/2021] [Indexed: 06/12/2023]
Abstract
Salen-type Schiff bases are a kind of important compounds and are widely used. In order to explore the effect of alkyl groups and substituents attached to aromatic ring on the chemical shifts, 63 title compounds were synthesized. Their 1 H NMR and 13 C NMR spectra were obtained; and the effects of the alkyl chain length and substituents on the chemical shifts (δH (CHN), δC (CHN), δH (OH), and δC (COH)) were studied. The results show that (1) the alkyl polarizability effect index (PEI) has an important influence on the chemical shifts of the above four atoms, with the increase of PEI, the values of δH (CHN) and δc(CHN) decrease, and the values of δH (OH) and δC (COH) increase. (2) The influence of substituent X attached to aromatic ring on the chemical shift is related to its position by taking OH or CHN as reference. As for the effect of substituent on the chemical shifts, the effect of Hammett constant σ(X)OH and excited-state substituent parameter σ CC ex X OH with OH as reference are different from that ofσ(X)CHN and σ CC ex X CH N with CHN as reference, and there is a "homoring competition effect" of the substituent. (3) The effect of the cross-interaction between X and OH on the chemical shift is also significantly different due to the different position of X. Quantitative correlation equations against chemical shifts were built for the four atoms, and the stability and prediction ability of the obtained equations were confirmed by leave-one-out cross validation.
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Affiliation(s)
- Bai-Ying Wei
- School of Resource Environment and Safety Engineering, School of Chemistry and Chemical Engineering, Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan, China
| | - Chen-Zhong Cao
- School of Resource Environment and Safety Engineering, School of Chemistry and Chemical Engineering, Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan, China
| | - Chao-Tun Cao
- School of Resource Environment and Safety Engineering, School of Chemistry and Chemical Engineering, Key Laboratory of Theoretical Organic Chemistry and Function Molecule, Ministry of Education, Hunan University of Science and Technology, Xiangtan, China
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2
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A novel single-pot synthesis of dinuclear and mononuclear copper(II) complexes with sterically demanding Schiff bases: Structural, spectral, magnetic, electrochemical, DNA binding and theoretical investigation. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.129955] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Kumar S, Gupta SK. Synthesis, spectral and electrochemical studies of mononuclear samarium (II), europium (II) and ytterbium (II) complexes with a NNO donor Schiff base derived from 4-methyl-2,6-dibenzoylphenol and propane-1,3-diamine. INORG NANO-MET CHEM 2019. [DOI: 10.1080/24701556.2019.1606828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Sanjay Kumar
- School of Studies in Chemistry, Jiwaji University, Gwalior, India
| | - Sushil K Gupta
- School of Studies in Chemistry, Jiwaji University, Gwalior, India
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Hussain A, AlAjmi MF, Rehman MT, Amir S, Husain FM, Alsalme A, Siddiqui MA, AlKhedhairy AA, Khan RA. Copper(II) complexes as potential anticancer and Nonsteroidal anti-inflammatory agents: In vitro and in vivo studies. Sci Rep 2019; 9:5237. [PMID: 30918270 PMCID: PMC6437194 DOI: 10.1038/s41598-019-41063-x] [Citation(s) in RCA: 146] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 02/18/2019] [Indexed: 02/02/2023] Open
Abstract
Copper-based compounds are promising entities for target-specific next-generation anticancer and NSAIDS therapeutics. In lieu of this, benzimidazole scaffold plays an important role, because of their wide variety of potential functionalizations and coordination modes. Herein, we report three copper complexes 1-3 with benzimidazole-derived scaffolds, a biocompatible molecule, and secondary ligands viz, 1-10-phenanthroline and 2,2'-bipyridyl. All the copper complexes have been designed, synthesized and adequately characterized using various spectroscopic techniques. In-vitro, human serum albumin (HSA) binding was also carried out using fluorescence technique and in-silico molecular modeling studies, which exhibited significant binding affinities of the complexes with HSA. Furthermore, copper complexes 1-3 were tested for biological studies, i.e., anticancer as well as NSAIDS. In vitro cytotoxicity results were carried out on cultured MCF-7 cell lines. To get the insight over the mechanism of action, GSH depletion and change in lipid peroxidation were tested and thus confirmed the role of ROS generation, responsible for the cytotoxicity of the complexes 1-3. Moreover, the copper complexes 1-3 were tested for potential to act as NSAIDS on albino rats and mice in animal studies in-vivo. Additionally, we also predicted the mechanism of action of the copper complexes 1-3 using molecular modeling studies with COX-2 inhibitor.
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Affiliation(s)
- Afzal Hussain
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Mohamed Fahad AlAjmi
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Md Tabish Rehman
- Department of Pharmacognosy, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh, 11451, Saudi Arabia
| | - Samira Amir
- Department of Chemistry, College of Science and General Studies, Alfaisal University, Riyadh, Saudi Arabia
| | - Fohad Mabood Husain
- Department of Food Science and Nutrition, Faculty of Food and Agricultural Sciences, King Saud University, 2460, Riyadh, 11451, Saudi Arabia
| | - Ali Alsalme
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Maqsood Ahmad Siddiqui
- Al-Jeraisy Chair for DNA Research, Zoology Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Abdulaziz A AlKhedhairy
- Al-Jeraisy Chair for DNA Research, Zoology Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Rais Ahmad Khan
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.
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Kusmariya BS, Mishra AP. Theoretical and experimental studies on three new coordination complexes of Co(II), Ni(II), and Cu(II) with 2,4-dichloro-6-{(E)-[(5-chloro-2 sulfanylphenyl)imino]methyl}phenol Schiff base ligand. J Mol Model 2015; 21:278. [PMID: 26438445 DOI: 10.1007/s00894-015-2805-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 08/30/2015] [Indexed: 11/24/2022]
Abstract
Three mononuclear coordination complexes of Co(II), Ni(II), and Cu(II) have been synthesized from 2,4-dichloro-6-{(E)-[(5-chloro-2-sulfanylphenyl)imino]methyl}phenol ligand (H 2 L) obtained by simple condensation reaction of 3,5-dichloro-2-hydroxybenzaldehyde and 2-amino-4-chlorobenzenethiol and characterized by elemental analysis, spectral (FT-IR, electronic, and (1)H-NMR), molar conductance, thermal, SEM, PXRD, and fluorescence studies. The PXRD analysis and SEM-EDX micrographs show the crystalline nature of complexes. The domain size and the lattice strain of synthesized compounds have been determined according to Williamson-Hall plot. TG of the synthesized complexes illustrates the general decomposition pattern of the complexes. The ligand exhibits an interesting fluorescence property which is suppressed after complex formation. The Co(II) complex adopted a distorted octahedral configuration while Ni(II) and Cu(II) complexes showed square planar geometry around metal center. The geometry optimization, HOMO-LUMO, molecular electrostatic potential map (MEP), and spin density of synthesized compounds have been performed by density functional theory (DFT) method using B3LYP/6-31G and B3LYP/LANL2DZ as basis set. Graphical abstract Three new coordination complexes of Co(II), Ni(II) and Cu(II) with 2,4-dichloro-6-{(E)-[(5-chloro-2 sulfanylphenyl)imino]methyl}phenol Schiff base ligand.
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Affiliation(s)
| | - A P Mishra
- Department of Chemistry, Dr. H. S. Gour Central University, Sagar, India, 470003.
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Bartyzel A, Kaczor AA. The formation of a neutral manganese(III) complex containing a tetradentate Schiff base and a ketone – synthesis and characterization. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1073268] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Agata Bartyzel
- Faculty of Chemistry, Department of General and Coordination Chemistry, Maria Curie-Skłodowska University, Lublin, Poland
| | - Agnieszka A. Kaczor
- Faculty of Pharmacy with Division of Medical Analytics, Department of Synthesis and Chemical Technology of Pharmaceutical Substances with Computer Modelling Lab, Medical University of Lublin, Lublin, Poland
- Department of Pharmaceutical Chemistry, School of Pharmacy, University of Eastern Finland, Kuopio, Finland
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Gupta SK, Anjana C, Sen N, Butcher RJ, Jasinski JP, Golen JA. An unusual hydroxy-substituted mononuclear nickel(II) complex with a tetradentate Schiff base: Synthesis, spectroscopy, electrochemistry, crystallography, DNA binding, and theoretical investigation. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.01.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Esmaielzadeh S, Azimian L, Shekoohi K, Mohammadi K. Coordination chemistry, thermodynamics and DFT calculations of copper(II) NNOS Schiff base complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:579-590. [PMID: 24992917 DOI: 10.1016/j.saa.2014.05.095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Revised: 05/29/2014] [Accepted: 05/30/2014] [Indexed: 06/03/2023]
Abstract
Synthesis, magnetic and spectroscopy techniques are described for five copper(II) containing tetradentate Schiff bases are synthesized from methyl-2-(N-2'-aminoethane), (1-methyl-2'-aminoethane), (3-aminopropylamino)cyclopentenedithiocarboxylate. Molar conductance and infrared spectral evidences indicate that the complexes are four-coordinate in which the Schiff bases are coordinated as NNOS ligands. Room temperature μeff values for the complexes are 1.71-1.80B.M. corresponding to one unpaired electron respectively. The formation constants and free energies were measured spectrophotometrically, at constant ionic strength 0.1M (NaClO4), at 25˚C in DMF solvent. Also, the DFT calculations were carried out to determine the structural and the geometrical properties of the complexes. The DFT results are further supported by the experimental formation constants of these complexes.
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Affiliation(s)
- Sheida Esmaielzadeh
- Department of Chemistry, Darab branch, Islamic Azad University, Darab 7481783143-196, Islamic Republic of Iran.
| | - Leila Azimian
- Department of Chemistry, Darab branch, Islamic Azad University, Darab 7481783143-196, Islamic Republic of Iran
| | - Khadijeh Shekoohi
- Department of Chemistry, Darab branch, Islamic Azad University, Darab 7481783143-196, Islamic Republic of Iran
| | - Khosro Mohammadi
- Chemistry Department, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Islamic Republic of Iran
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Synthesis, X-ray structure, electrochemical behaviour and fluorescence studies of mononuclear dioxouranium complexes with oxygen donor ligands. Polyhedron 2014. [DOI: 10.1016/j.poly.2014.01.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Gupta SK, Anjana C, Sen N, Butcher RJ, Jasinski JP. Synthesis, crystal structure, DFT and spectroscopic studies of mononuclear chromium(III) complex with bidentate ligand. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.05.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Gupta SK, Anjana C, Butcher RJ, Sen N. Dichlorido[μ-10,21-dimethyl-2,7,13,18-tetra-phenyl-3,6,14,17-tetra-aza-tricyclo-[17.3.1.1]tetra-cosa-1(23),2,6,8,10,12(24),13,17,19,21-deca-ene-23,24-diolato]dicopper(II) ethanol hemisolvate dihydrate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:m1531-2. [PMID: 21589231 PMCID: PMC3011775 DOI: 10.1107/s1600536810042248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 10/18/2010] [Indexed: 11/21/2022]
Abstract
The dinuclear title complex, [Cu2(C46H38N4O2)Cl2]·0.5C2H5OH·2H2O, is located on crystallographic inversion centres with two half-molecules in the asymmetric unit. The two CuII atoms are coordinated by a hexadentate dianionic ligand formed in situ from the condensation of two tridentate ligands by four imine N atoms and two bridging phenolate O atoms along with two Cl atoms at axial positions. The coordination geometry around the metal atoms is distorted square-pyramidal (τ = 0.185 and 0.199). The non-bonding Cu⋯Cu distances are 2.9556 (12) and 2.9506 (12) Å in the two dimers. The packing is stabilized through solvent-mediated intermolecular O—H⋯O and O—H⋯Cl hydrogen bonds. The diamine chain of one of the dimers is disordered over two positions in a 0.680 (5):0.320 (5) ratio.
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Synthesis of octahedral cobalt(III) complexes with mono- and di-condensed Schiff base ligands: A template-directed approach for the isolation of a rare kind of mixed-ligand complex. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.04.007] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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