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Artigos de revistas sobre o tema "Schiff base ligands"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Biswas, Arpita. "A Brief Review on Homo-/Hetero-nuclear Co-ordination Compounds Derived from Some Single Compartmentl Acyclic Schiff Base Ligands having N-,O-Donor Centres." Oriental Journal Of Chemistry 38, no. 4 (2022): 957–66. http://dx.doi.org/10.13005/ojc/380417.

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Tetradentate acyclic compartmental Schiff base ligand with N2O2 compartment afford suitable coordination environment for large variety of metal ions. This type of ligands can easily be synthesized by [2+1] condensation of a carbonyl compounds with a diamine. Several metal complexes have been reported from the single- and double-compartment acyclic Schiff base ligands which are the [2+1] condensation products of salicylaldehyde, 2-hydroxyacetophenone, 3-methoxysalicylaldehyde, 3-ethoxysalicylaldehyde and a diamine; The diamine counterpart in these ligands are ethylenediamine, 1,3-diaminopropane

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2

Abbasova, G. G., A. A. Medjidov, R. H. Ismayilov, A. M. Pashajanov, and P. A. Fatullayeva. "Synthesis and characterization of rare earth metal complexes with novel Schiff base." Fine Chemical Technologies 20, no. 1 (2025): 47–54. https://doi.org/10.32362/2410-6593-2025-20-1-47-54.

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Objectives. The work set out to synthesize Schiff base ligands containing a hydrazone moiety of (Z)-2-((E)-1-hydroxyethylidene)hydrazineylidene)-2-phenylacetic acid, as well as their praseodymium, samarium, europium, and gadolinium complexes, and to study their structure.Methods. The structure of ligands was identified by infrared (IR), ultraviolet (UV), and nuclear magnetic resonance (NMR) spectroscopy. The structure of the complexes was confirmed by elemental analysis, IR and UV spectroscopy, and thermogravimetric analysis.Results. The Schiff base ligands containing a hydrazone moiety of (Z)

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3

Haruna, A., I. T. Sirajo, M. M. Rumah, and Y. Albashir. "Synthesis, Characterization, Biological Properties, ADMET and Drug-likeness Analysis of Mn (II) complexes with Schiff Bases Derived from Sulphathiazole and 4-diethylaminosalicyaldehyde/Salicyaldehyde." Journal for Research in Applied Sciences and Biotechnology 2, no. 6 (2023): 58–68. http://dx.doi.org/10.55544/jrasb.2.6.10.

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Mn (II) complexes were synthesized with the Schiff base ligand obtained by the condensation of sulfathiazole with 4-diethylaminosalicyaldehyde/Salicyaldehyde. Their characterization was performed by elemental analysis, molar conductance, melting points, magnetic susceptibility, infrared, and UV–Vis spectral analysis. The results suggest that the Schiff bases and their complex are synthesized in excellent yield, molar conductance studies on the complexes indicated they were non-electrolytic. The IR data indicated that the Schiff base ligand is tridentate coordinated to the metallic ion with two

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4

Odularu, Ayodele Temidayo. "Manganese Schiff Base Complexes, Crystallographic Studies, Anticancer Activities, and Molecular Docking." Journal of Chemistry 2022 (August 24, 2022): 1–19. http://dx.doi.org/10.1155/2022/7062912.

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Choice of ligands is significant to successful synthesis of metal complexes (coordination compounds). This study reports the use of Schiff base as the right ligand to control the poor bioavailability and neurodegenerative toxicity challenges of manganese ion. In line with this study, document analysis was used as the methodological approach to evaluate the significance of Schiff base ligands in easing these manganese’s challenges and aligning the resultant coordination compounds (manganese Schiff base complexes) as therapeutic agents in anticancer studies. Report also involves crystallographic

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5

El‐Boraey, Hanaa A., Randa M. Abdel‐Rahman, Ensaf M. Atia, and Ohyla A. EL‐Gammal. "Synthesis, spectral and thermal studies of new Schiff base copper(II) complexes with their biological effect on Entomopathogenic nematodes." Vietnam Journal of Chemistry 60, no. 2 (2022): 140–56. http://dx.doi.org/10.1002/vjch.202100080.

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AbstractNew Schiff base ligands; (Z)‐1,5‐diphenyl‐2‐((thiophen‐2‐ylmethylene)amino)‐1H‐pyrrole‐3‐carbonitrile (L1); or (Z)‐2‐((2,4‐dihydroxybenzylidene)amino)‐1,5‐diphenyl‐1H‐pyrrole‐3‐carbonitrile (H2L2) and their Cu(II) complexes have been isolated and characterized using elemental analysis, spectral (FT‐IR, 1H NMR, UV/vis, EPR), molar conductivity and magnetic moment measurements, in addition to thermal techniques. FT‐IR spectra established that the Schiff base L1 coordinates as neutral bidentate or tridentate ligand. While the Schiff base H2L2 ligates as neutral or monobasic bidentate liga

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6

Ayuba, Isiyaku, Tajo Siraj Ibrahim, Umar Maigari Aishatu, and Magaji Buhari. "Synthesis, characterization and anti-bacterial activity of Schiff Base and its mixed ligand complexes of Cr (II) and Co (II) containing vanillin and 2-aminophenol." Dutse Journal of Pure and Applied Sciences 7, no. 4a (2022): 98–104. http://dx.doi.org/10.4314/dujopas.v7i4a.11.

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Schiff Base are organic ligand that contained azomethine linkage (-HC=N-) which shows biological importance. Schiff Base from vanillin and 2-aminophenol was synthesized in 1:1 mole ratio. The complexes of Cr (II) and Co (II) from Schiff Base in 1:2 mole ratio metal-ligand (M-L) and the mixed ligand complexes from Schiff Base and 2-aminophenol in 1:1:1 mole ratio ligand-metal-ligand(L-M-L) were synthesized and characterized based on solubility, melting point, conductivity, Fourier transform infrared spectroscopy (FTIR) and ultraviolet (UV). The solubility result shows that, dimethyl sulfoxide(D

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7

Osypiuk, Dariusz, Agata Bartyzel, and Beata Cristóvão. "Coordination Polymers of Vanadium and Selected Metal Ions with N,O-Donor Schiff Base Ligands—Synthesis, Crystal Structure, and Application." Molecules 30, no. 5 (2025): 1104. https://doi.org/10.3390/molecules30051104.

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This review provides an overview of the synthesis, characterization and application of coordination polymers based on N,O-donor Schiff base ligands. The coordination polymers (CPs) represent a novel class of inorganic–organic hybrid materials with tunable compositions and fascinating structures. They are composed of metal ions and organic ligands. Therefore, the nature of the metal ion and type of organic ligand is the most significant factor in constructing targeted coordination polymers with the desired properties. Due to the versatile coordination modes, N,O-donor Schiff base ligands are al

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8

Hari, S. Yadav, and L. Kumawat Gopal. "Synthesis, Spectroscopic, Biological, and Theoretical Evaluation of Novel Zirconium (IV) N, O Donor Amino Acid Schiff Base Complexes." Chemistry Research Journal 8, no. 1 (2023): 12–22. https://doi.org/10.5281/zenodo.11296500.

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<strong>Abstract </strong>A series of<strong> </strong>novel dichlorozirconium (IV) Schiff bases complexes [ZrCl<sub>2</sub> (L)<sub>2</sub>] (LH = N, O donor Schiff base derived by the condensation of 2-Acetyl-5-methylfuran & 2-acetyl-4-methyl thiophene with amino acids) were synthesized by the reaction of zirconium (IV) chloride and sodium salt of an N, O donor Schiff base ligand and characterized. The authenticity of all the synthesized ligands and their Zr (IV) complexes had been elucidated by microanalysis, various spectroscopic techniques like FT-IR, <sup>1</sup>H NMR, <sup>13</sup>C

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9

Hsu, Chiao-Yin, Hsi-Ching Tseng, Jaya Kishore Vandavasi та ін. "Investigation of the dinuclear effect of aluminum complexes in the ring-opening polymerization of ε-caprolactone". RSC Advances 7, № 31 (2017): 18851–60. http://dx.doi.org/10.1039/c7ra02136d.

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Al complexes bearing hydrazine-bridging Schiff base ligands showed the best catalytic activity, approximately 3- to 11-fold higher than that of dinuclear Al complexes bearing Salen ligands and mononuclear Al complexes bearing Schiff base ligands.

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10

D. T. Sakhare. "Synthesis, Spectroscopic Characterization, In-Vitro and Antimicrobial Activities of Some Metal (II) Complexes of 5-choloro-2-(((4,6-Dimethoxypyrimidin-2-yl) Imino) Methyl) Phenol." International Journal of Scientific Research in Chemistry 9, no. 6 (2024): 01–09. https://doi.org/10.32628/ijsrch24961.

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The novel Schiff base ligand has been synthesized by the condensation of 5-chlorosalicylaldehyde and 2-amino-4,6-dimethoxypyrimidine. Metal complexes of the Schiff base were prepared by the reaction of the Schiff base and Iron nitrate in ethanol solution. The complexes isolated, washed and dried. The Schiff base is pale yellow, while Cu(II) and Mn(II) complexes is light yellow.The synthesized compounds have been characterized by FT-IR, 1H-NMR and UV-Vis techniques for the ligands and FT-IR, UV-Vis, all reactions monitored by TLC, molar conductivity and magnetic susceptibility measurements for

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11

Soroceanu, Alina, and Alexandra Bargan. "Advanced and Biomedical Applications of Schiff-Base Ligands and Their Metal Complexes: A Review." Crystals 12, no. 10 (2022): 1436. http://dx.doi.org/10.3390/cryst12101436.

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Because of their importance in a variety of interdisciplinary study domains, Schiff-base ligands have performed a significant role in the evolution of contemporary coordination chemistry. This almost-comprehensive review covers all the aspects and properties of complexes, starting from the Schiff-base ligands. Our work is centered on the eloquent advances that have been developed since 2015, with special consideration to recent developments. Schiff-base ligands and their complexes are adaptable compounds obtained from the condensation of two compounds: a carbonyl with an amino. The corresponde

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12

Sharma, Bharat Prasad, Sarvesh Kumar Pandey, Bishnu Prasad Marasini, Sabita Shrestha, and Motee Lal Sharma. "Oxovanadium(IV) Complexes with Triazole Based Schiff Base Ligands: Synthesis, Characterization and Antibacterial Study." Journal of Nepal Chemical Society 42, no. 1 (2021): 56–63. http://dx.doi.org/10.3126/jncs.v42i1.35332.

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Schiff bases have been synthesized by the reaction of triazole containing primary amine with aromatic carbonyl compounds. The Schiff bases prepared, act as ligand when these are made in contact with oxovanadium (VO2+) ion. Some new mononuclear oxovanadium(IV) complexes have been synthesized by the reaction of Schiff base ligands with vanadyl sulphate (VOSO4.xH2O) and the complexes are analyzed by different spectroscopic methods; [fourier-transform infrared (FTIR), ultraviolet-visible (UV-Vis.), electron paramagnetic resonance (EPR)], X-ray diffraction (XRD) analysis, elemental analysis, and co

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13

Jurowska, Anna, Janusz Szklarzewicz, Maciej Hodorowicz, Wiktoria Serafin, Ennio Zangrando, and Ghodrat Mahmoudi. "Ionic Dioxidovanadium(V) Complexes with Schiff-Base Ligands as Potential Insulin-Mimetic Agents—Substituent Effect on Structure and Stability." Molecules 27, no. 20 (2022): 6942. http://dx.doi.org/10.3390/molecules27206942.

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Four dioxidovanadium(V) complexes with Schiff-base ligands based on 2-hydroxybenzhydrazide with four different substituted salicylaldehydes (5-chlorosalicylaldehyde, 3,5-dichlorosalicylaldehyde, 5-nitrosalicylaldehyde, 3-bromo-5-chlorosalicylaldehyde) were synthesized and described, by using V2O5 and triethylamine. The single crystal X-ray structure measurements as well as elemental analyses and IR spectra confirmed the formulas of the ionic complexes with a protonated triethylamine acting as counterion, HTEA[VO2(L)] (HL = Schiff-base ligand). The kinetic stability of the complexes at pH = 2 a

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14

Sharma, Deeksha, and Prof Arpan Bhardwaj. "A COMPARITIVE VIEW OVER THE SYNTHESIS OF SCHIFF BASE LIGANDS AND METAL COMPLEXES BY CONVENTIONAL AND SOLVENT FREE ROUTES." International Journal of Engineering Technologies and Management Research 4, no. 12 (2020): 107–17. http://dx.doi.org/10.29121/ijetmr.v4.i12.2017.603.

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In the present paper, synthesis of Schiff base ligands and the metal complexes are studied and compared by conventional and solvent free route. The synthesis of Schiff base ligands of amino acids (Glycine, Phenylalanine and Tyrosine) with salicylaldehyde and their mixed ligand ternary Cu(II) complexes are discussed. Other ligands are used in co-ordinaion with the schiff base is 1,10- Phenanthroline/thiourea in equimolar ratio. The environmentally efficient and modern developed method for synthesis is the solid state synthesis of salicylidene amino acids through pestle mortar synthetic procedur

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15

Deeksha, Sharma, and Arpan Bhardwaj Prof. "A COMPARITIVE VIEW OVER THE SYNTHESIS OF SCHIFF BASE LIGANDS AND METAL COMPLEXES BY CONVENTIONAL AND SOLVENT FREE ROUTES." International Journal of Engineering Technologies and Management Research 4, no. 12 : SE (2017): 107–17. https://doi.org/10.5281/zenodo.1163783.

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<strong><em>In the present paper, synthesis of Schiff base ligands and the metal complexes are studied and compared by conventional and solvent free route. The synthesis of Schiff base ligands of amino acids (Glycine, Phenylalanine and Tyrosine) with salicylaldehyde and their mixed ligand ternary Cu(II) complexes are discussed. Other ligands are used in co-ordinaion with the schiff base is 1,10- Phenanthroline/thiourea  in equimolar ratio. The environmentally efficient and modern developed method for synthesis is the solid state synthesis of salicylidene amino acids through pestle mortar

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16

Sobola, Abdullahi, Gareth Watkins, and Brecht van. "Synthesis, characterization and biological study of Cu(II) complexes of aminopyridine and (aminomethyl)pyridine Schiff bases." Journal of the Serbian Chemical Society 83, no. 7-8 (2018): 809–19. http://dx.doi.org/10.2298/jsc170913002s.

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The synthesis, characterization and antimicrobial activity determination of some aminopyridine- and (aminomethyl)pyridine?salicylaldimine copper(II) complexes were realized. The ligands, L1?L6, were prepared by condensing salicylaldehyde and o-vanillin with 2- and 3-amino- and (aminomethyl)pyridine, respectively. The complexes were characterized by micro-analytical, electronic, infrared and conductivity data. The structures of the Schiff base ligands were further confirmed from 1H- and 13C-NMR spectral data. This study established that salicylaldimine ligands could coordinate as neutral specie

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17

Fuentealba, Mauricio, Deborah Gonzalez, and Vania Artigas. "Structural Characterization of Iron(iii) Dinuclear Complexes." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1695. http://dx.doi.org/10.1107/s2053273314083041.

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Dinuclear complexes have been studied for different purposes: magnetic materials[1], Non-linear optics materials[2], molecular switches [3], mixed-valence systems, etc. With these antecedents in mind, we present in this work a new series of dinuclear Iron(III) complexes formed by different Schiff bases ligands. The reaction starting from the iron chloride salts with the 5-chloro or 5-bromo-salycilaldehyde and ethylendiamine yields two different kinds of dinuclear iron complexes in different reaction conditions. The first one (Fig N°1), are methoxo-bridged dinuclear iron(III) complexes in which

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18

Kothari, R. "Anti-cancer activity of novel Schiff base copper (II) complex: synthesis and characterization." Journal of Optoelectronic and Biomedical Materials 15, no. 4 (2023): 127–40. http://dx.doi.org/10.15251/jobm.2023.154.127.

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A novel thiosemicarbazone substituted schiff base ligand and its Cu(II) complex have been prepared and characterized. Schiff bases are considered as an important pro ligand in coordination chemistry because they easily form stable complexes with biologically active transition metal ions. Such as Cu 2+, Zn2+, Ni2+ etc. In this paper, novel Cu (II) complexes of thiosemicarbazone ligands were synthesised by refluxing thiosemicarbazone substituted pro ligands with copper salts in 1:1 molar ratio in absolute ethanol under thermal condition at 80o c for 5-6 hour. The resulting brown coloured copper

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19

Majeed, May S. "Synthesis and Characterization of New Polymeric-Schiff Bases and Their Complexes." BASRA JOURNAL OF SCIENCE 40, no. 3 (2022): 649–65. http://dx.doi.org/10.29072/basjs.20220309.

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Complexations of three new polymeric Schiff base ligands to transition metals (Ni and Zn) were synthesized via the preparation of a Schiff base ligand on Styrene-allyl alcohol (SAA) and two types of polyvinyl alcohol (PVA). These polymers were a supporting agent for preparing Schiff base ligand on it, followed by complexation with transition metals. Modified SAA and PVA polymers with Ni (II) and Zn (II) have been synthesized in order to investigate some transition metal complexes roles in these polymer modifications. The prepared polymeric complexes were confirmed and characterized by FTIR spe

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20

Sakhare, Kuldeep B., Kirti N. Sarwade, Yogesh N. Bharate, and Mahadeo A. Sakhare. "Eco-friendly synthesis of azo Schiff base ligand and its metal complexes: Anticancer, antidiabetic and antimicrobial activities." Mongolian Journal of Chemistry 26, no. 53 (2025): 40–48. https://doi.org/10.5564/mjc.v26i53.3791.

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Now a days Cancer, Diabetics and other diseases are become major issue of the society. Due to this synthesis of potential medicines against it is a major challenge to the researcher and hence Schiff base ligand became an attracting class of researcher. The azo Schiff base ligands are most widely used in various fields such as medicinal, pharmacological, biological etc. due to its broad spectrum of biological activity. In this research paper we have synthesized the Azo-Schiff base ligand and its transition metal complexes by simple griding method. Synthesis via green approach and biological evo

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21

Bhowmik, K. R. Nath Bhowmik, R. N. Dutta Purkayastha, and S. Roy. "Synthesis, Structural Characterization, Reactivity and Bioactivity Studies of Some Binuclear Salen Type Schiff Base Complexes of Manganese(III)." Asian Journal of Chemistry 36, no. 3 (2024): 690–96. http://dx.doi.org/10.14233/ajchem.2024.31074.

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Four new phenoxy bridged binuclear Salen type Schiff base complexes of manganese(III), [MnLX]2 with tetradentate Schiff base, H2L [H2L = N,N′-O-phenylene bis(salicylaldimine)] containing anionic co-ligands, X (X = benzoate, p-hydroxy benzoate, p-aminobenzoate, 3,5-dinitrobenzoate) have been synthesized from manganese(II) acetate, Schiff base (H2L) and the corresponding co-ligands in methanol medium. Schiff base ligand (H2L) was obtained in situ by condensation of salicylaldehyde and o-phenylenediamine in aqueous methanol. Elemental analyses, FT-IR, molar conductance, UV-visible spectroscopic s

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22

Bakhtiari, Atefeh, and Javad Safaei-Ghomi. "Effects of Chiral Ligands on the Asymmetric Carbonyl-Ene Reaction." Synlett 30, no. 15 (2019): 1738–64. http://dx.doi.org/10.1055/s-0037-1611875.

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The carbonyl-ene reaction is one of the most well-known reactions for C–C bond formation. Based on frontier molecular orbitals (FMO), carbonyl-ene reactions occur between the highest occupied molecular orbital (HOMO) of the ene compound bearing an active hydrogen atom at the allylic center and the lowest unoccupied molecular orbital (LUMO) of the electron-deficient enophile, which is a carbonyl compound. A high activation barrier enforces the concerted ene reaction rather than a Diels–Alder reaction at high temperature. Employing a catalytic system can eliminate defects in the ene reaction, an

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23

Divya, Kumble, Geetha M. Pinto, and Asha F. Pinto. "APPLICATION OF METAL COMPLEXES OF SCHIFF BASES AS AN ANTIMICROBIAL DRUG: A REVIEW OF RECENT WORKS." International Journal of Current Pharmaceutical Research 9, no. 3 (2017): 27. http://dx.doi.org/10.22159/ijcpr.2017.v9i3.19966.

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Schiff bases are versatile ligands which are synthesized from the condensation of primary amines with carbonyl groups. Synthesis of Schiff base transition metal complexes by using Schiff base as ligands appears to be fascinating in view of the possibility of obtaining coordination compounds of unusual structure and stability. These transition metal complexes have received exceptional consideration because of their active part in metalloenzymes and as biomimetic model compounds due to their closeness to natural proteins and enzymes. These compounds are very important in pharmaceutical fields be

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24

Nguyen, Quang Trung, Phuong Nam Pham Thi, and Van Tuyen Nguyen. "Synthesis, Characterization, and In Vitro Cytotoxicity of Unsymmetrical Tetradentate Schiff Base Cu(II) and Fe(III) Complexes." Bioinorganic Chemistry and Applications 2021 (May 3, 2021): 1–10. http://dx.doi.org/10.1155/2021/6696344.

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Unsymmetrical tetradentate Schiff base Fe(III) and Cu(II) complexes were prepared by the coordination of some unsymmetrical tetradentate Schiff base ligands with CuCl2·2H2O or FeCl3·6H2O. The obtained complexes were characterized by ESI-MS, IR, and UV-Vis. The spectroscopic data with typical signals are in agreement with the suggested molecular formulae of the complexes. Their cyclic voltammetric studies in acetonitrile solutions showed that the Cu(II)/Cu(I) and Fe(III)/Fe(II) reduction processes are at (−)1.882–(−) 1.782 V and at (−) 1.317–(−) 1.164 V, respectively. The in vitro cytotoxicity

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25

Kassim, Karimah, and Muhamad Azwan Hamali. "Green Synthesis and Antimicrobial Studies of Ni(II) and Zn(II) Dinuclear Schiff Base Complexes." International Journal of Engineering & Technology 7, no. 3.11 (2018): 237. http://dx.doi.org/10.14419/ijet.v7i3.11.16016.

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A series of tetradentate Zn(II) and Ni(II) Schiff base complexes derived from N,N-Bis-(2-hydroxyl-5-methoxybenzaldehyde)-m-phenylenediamine was synthesized using microwave assisted synthesis approach for 5-15 minutes. The confirmation of the ligand as well the respective complexes has been elucidated through physiochemical and spectroscopy analyses. The studies show that two metal ions formed bridges connecting two Schiff base ligands. The nitrogen and oxygen atoms in each ligand served as coordination sites for the metal ions. The Schiff base ligand and complexes were screened for antimicrobi

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26

S. Sharma, S., J. V. Ramani, D. P. Dalwadi, et al. "New Ternary Transition Metal Complexes of 2-{[(2-aminophenyl)imino] methyl}Phenol and Metformin: Synthesis, Characterization and Antimicrobial Activity." E-Journal of Chemistry 8, no. 1 (2011): 361–67. http://dx.doi.org/10.1155/2011/723491.

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Complexes of Co(II), Ni(II) and Cu(II) were synthesized from Schiff base 2-{[(2-aminophenyl)imino]methyl}phenol and metformin. The authenticity of the transition metal complexes were characterized by elemental analyses, conductance and magnetic susceptibility measurements, as well as spectroscopic (IR, electronic) and thermal studies. IR spectral studies revealed the existence of the ligands in the amine form in the solid state. The magnetic and electronic spectral studies suggest an octahedral geometry for all the complexes. The metformin acts as a bidentate ligand and Schiff base ofo-phynele

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27

Sundaramurthy, Santha Lakshmi, Geetha J., and Saranya J. "SYNTHESIS, SPECTROSCOPIC CHARACTERISATION AND IN VITRO BIOLOGICAL STUDIES OF SCHIFF BASE TRANSITION METAL (II) COMPLEXES." International Journal of Applied and Advanced Scientific Research 1, no. 2 (2017): 30–37. https://doi.org/10.5281/zenodo.256297.

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Coordination chemistry is the one of the interesting branch in inorganic chemistry. The research in coordination chemistry plays very important role in many fields including medical, industrial, analytical and material science. Schiff base is one of the important ligands in the field of Coordination Chemistry research. Schiff base is a condensation product of primary amines with carbonyl compounds. Amino acids are biologically important organic compounds and are very essential for every metabolic process. The research area encircling the coordination compounds with azomethine ligands derived f

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Jamil, Yasmin Mos'ad, Fathi Mohammed Al-Azab, and Nedhal Abdulmawla Al-Selwi. "Novel organophosphorus Schiff base ligands: Synthesis, characterization, ligational aspects, XRD and biological activity studies." Ecletica Quimica 48, no. 3 (2023): 36–53. http://dx.doi.org/10.26850/1678-4618eqj.v48.3.2023.p36-53.

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Six complexes have been synthesized from Cu(II), Ni(II), and Co(II) with new bidentate N2 donor Schiff base ligand (2-methoxybenzalidene-1-phenylsemicarbazide L1) and tridentate N2O donor organophosphorus Schiff base ligand (2-methoxybenzalidenediphenylphosphate-1-phenylsemicarbazide L2). Both ligands were synthesized and characterized by metal analysis, infrared (IR), ultraviolet visible (UV-Vis), and nuclear magnetic resonance (NMR) spectral studies. The chemical structures of the synthesized complexes were characterized using their metal analysis, magnetic susceptibility, molar conductance,

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29

Raptopoulou, Catherine P. "Chiral 4f and 3d-4f Complexes from Enantiopure Salen-Type Schiff Base Ligands." Crystals 14, no. 5 (2024): 474. http://dx.doi.org/10.3390/cryst14050474.

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This review summarizes the structural characteristics and physicochemical properties of chiral 4f and 3d-4f complexes based on enantiopure salen-type Schiff base ligands. The chirality originates from the enantiopure diamines and is imparted to the Schiff base ligands and complexes and finally to the crystal structures. The reported enantiopure Schiff base ligands derive from the condensation of aromatic aldehydes, such as salicylaldehyde and its various derivatives, and the enantiopure diamines, (1R,2R) or (1S,2S)-1,2-diamino-cyclohexane, (1R,2R) or (1S,2S)-1,2-diamino-1,2-diphenylethane, (R)

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30

Sakhare, D. T. "Synthesis, Characterization and Biological Activity of New Pyrimidine Schiff Base and Its Cu(II), Ni(II) Complexes." Asian Journal of Chemical Sciences 15, no. 1 (2025): 138–47. https://doi.org/10.9734/ajocs/2025/v15i1355.

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The novel Schiff base ligand (E)-2-(((2-hydroxynaphthalen-1-yl)methylene)amino)-6-methylpyrimidin-4-ol has been attained through the condensation of 2-amino-4-hydroxy-6-methylpyrimidine and 2-hydroxy-1-naphthaldehyde. Metal complexes of the Schiff base were formed by the interaction of the Schiff base and metal nitrate in an ethanol solution. The complexes were isolated, cleaned, and dried. The Schiff base appears pale yellow, whereas the Cu(II) and Ni(II) complexes exhibit a light yellow color. The synthesized compounds have been characterized by FT-IR, 1H-NMR, and UV-Vis techniques for the l

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Pavlović, Gordana, Mihael Majer та Marina Cindrić. "A tetranuclear cubane-like nickel(II) complex with a tridentate salicylideneimine Schiff base ligand: tetrakis[μ3-4-methyl-N-(2-oxidophenyl)salicylideneiminato]tetrakis[methanolnickel(II)] methanol 0.8-solvate". Acta Crystallographica Section E Crystallographic Communications 72, № 12 (2016): 1776–79. http://dx.doi.org/10.1107/s2056989016017722.

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The tetranuclear title complex, [Ni4(C14H11NO2)4(CH3OH)4]·0.8CH3OH, has a distorted cubane topology shaped by four Schiff base ligands. The cubane [Ni4(μ3-O4)] core is formedviathe O atoms from the Schiff base ligands. The octahedrally coordinated NiIIions occupy alternating vertices of the cube. Each NiIIion is coordinated by oneO,N,O′-tridentate dianionic ligand, two O atoms of oxidophenyl groups from adjacent ligands and the O atom of a coordinating methanol molecule. The cubane core is stabilizedviaan intramolecular O—H...O hydrogen bond between the hydroxy group of the coordinating methan

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Lisandra, N. R., Antony C. Deena, and V. S. Saritha. "Synthesis, Spectral Characterization, in vitro cytotoxicity and antibacterial studies of a Novel Schiff Base Ligand derived from S-Carboxy Methyl-L-Cysteine and 5-Chloroisatin and its Cu(II), Ni(II) and Co(II) Metal complexes." Research Journal of Chemistry and Environment 29, no. 7 (2025): 12–19. https://doi.org/10.25303/297rjce012019.

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A novel chiral Schiff base ligand, namely S-Carboxy Methyl-L-Cysteine 5-Chloroisatin (CMCCI) was synthesized through the condensation of the chiral amino acid S-Carboxy Methyl-L-Cysteine and 5-Chloroisatin in basic medium. The resulting amino acid Schiff base ligand and its metal complexes with Cu(II), Ni(II) and Co(II) were characterized using elemental analysis, FTIR, 1H NMR and UV-visible spectroscopy, confirming the formation of CMCCI and (CMCCI)2M type metal complexes. The formation of the ligand CMCCI was also confirmed by mass spectral analysis. The analytical results suggested that the

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M., T. H. TARAFDER, and C. PAL S. "Mixed Ligand Complexes of Chromium(III) containing some Bidentate Amines and Quadridentate Schiff Base Ligands." Journal of Indian Chemical Society Vol. 72, Sep 1995 (1995): 581–84. https://doi.org/10.5281/zenodo.5909239.

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Department of Chemistry, University of Rajshahi, Rajshahi, Bangladesh <em>Manuscript received 15 July 1993, revised 27 January 1994, accepted 9 February 1994</em> A number of new mixed ligand complexes of chromium(m) using two diamines and three Schiff bases have been synthesised, having the compositions : [CrL<sub>2</sub>X<sub>2</sub>]X.nH<sub>2</sub>O, [Cr(C<sub>20</sub>H<sub>24</sub>N<sub>4</sub>\(O_2^2-\))(NCS)<sub>2</sub>]NCS, [Cr(C<sub>17</sub>H<sub>16</sub>- N<sub>2</sub>\(O_2^2-\))(NCS)<sub>2</sub>]NCS, [Cr(C<sub>17</sub>H<sub>24</sub>N<sub>4</sub>S<sub>2</sub>)(NCS)<sub>2</sub>]NCS, w

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Rashad, Alaa Adnan, Dina A. Najeeb, Shaymaa M. Mahmoud, et al. "Optical and surface properties of Schiff base ligands and Cu(II) and Co(II) complexes." Fine Chemical Technologies 19, no. 5 (2024): 452–61. http://dx.doi.org/10.32362/2410-6593-2024-19-5-452-461.

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Objectives. To study the transition of electrons in 1,2-phenyl(4’-carboxy)benzylidene Schiff base ligand and transition metal ions, optical properties, as well as the surface chemistry of supported transition metals using diffuse reflectance spectroscopy (DRS); to study the roughness and morphology of the Schiff base ligand and its complexes using atomic force microscopy (AFM).Methods. DRS, AFM, and Fourier-transform infrared spectroscopy instruments were used to identify electron transitions, optical properties, and surface morphology in Schiff base ligands and their complexes.Results. The DR

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Ghosh, Subrata, Sukanya Bagchi, Sujit Kamilya, and Abhishake Mondal. "Effect of ligand substituents and tuning the spin-state switching in manganese(iii) complexes." Dalton Transactions 50, no. 13 (2021): 4634–42. http://dx.doi.org/10.1039/d1dt00284h.

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This work unravels the magneto-structural behavior of mononuclear manganese(iii) complexes with judiciously chosen substituted Schiff-base ligands, showcasing the role of ligand substitutions in spin-state switching.

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Lian, Wen-Jing, Xin-Tian Wang, Cheng-Zhi Xie, et al. "Mixed-ligand copper(ii) Schiff base complexes: the role of the co-ligand in DNA binding, DNA cleavage, protein binding and cytotoxicity." Dalton Transactions 45, no. 22 (2016): 9073–87. http://dx.doi.org/10.1039/c6dt00461j.

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Four novel mixed-ligand copper(ii) Schiff base complexes were synthesized and characterized. The biological features of the complexes and how acetic auxiliary ligands manipulate these features were investigated.

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Al-Mosawy, Manar. "Review of the biological effects of Schiff bases and their derivatives, including their synthesis." Medical Science Journal for Advance Research 4, no. 2 (2023): 67–85. http://dx.doi.org/10.46966/msjar.v4i2.117.

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Aldehyde and amine buildup can shape Schiff's base complex of metal. Amino and carbonyl mixtures address a sizable group of ligands used to make Schiff bases that can facilitate with metal particles by the nitrogen iota of an azomethine particle. There has been much interest in these ligands. The C=N connect, in which different azomethines have been researched and professed to overwhelm massive organic activity, like impacts against microorganisms, growths, and infections, as well as against jungle fever and disease, might be the reason for the significance of azomethine replacements. Schiff b

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Joshi, K. R., A. J. Rojivadiya, and J. H. Pandya. "Synthesis and Spectroscopic and Antimicrobial Studies of Schiff Base Metal Complexes Derived from 2-Hydroxy-3-methoxy-5-nitrobenzaldehyde." International Journal of Inorganic Chemistry 2014 (November 17, 2014): 1–8. http://dx.doi.org/10.1155/2014/817412.

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Two new series of copper(II) and nickel(II) complexes with two new Schiff base ligands 2-((2,4-dimethylphenylimino)methyl)-6-methoxy-4-nitrophenol and 2-((3,4-difluorophenylimino)methyl)-6-methoxy-4-nitrophenol have been prepared. The Schiff base ligands were synthesized by the condensation of 2-hydroxy-3-methoxy-5-nitrobenzaldehyde with 2,4-dimethylaniline or 3,4-difluoroaniline. The ligands and their metal complexes have been characterized by IR, 1H NMR, mass and electronic spectra and TG analysis. The Schiff base ligands and their metal complexes were tested for antimicrobial activity again

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S P, Sridevi, Girija C R, and C. D. Satish. "Synthesis, Structure and Reactivity of Schiff Base Transition Metal Mixed Ligand Complexes Derived from Isatin and Salal." Oriental Journal Of Chemistry 37, no. 1 (2021): 169–76. http://dx.doi.org/10.13005/ojc/370123.

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A series of Isatin derivative Schiff Base ligands have been prepared by the nucleophilic addition of 5-Bromo Isatin with various amine derivatives and characterized by CHNS analysis and spectral data. Similarly, two of Salicylaldehyde ligand have been prepared by the nucleophilic addition of Salal with amine derivatives. In order to investigate the coordination behavior of these ligands and their metal complexes of the type M(acac)x, L [M = Cu(II), Ni(II); L = Schiff base ligands; x = 0 or 2] mixed ligand (chelate) have been prepared from the reaction of these ligands with their corresponding

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Wagh, Shaila, and B. R. Patil. "SYNTHESIS, SPECTRAL, THERMAL AND ANTIMICROBIAL STUDIES OF NEW METAL COMPLEXES OF SUBSTITUTED HYDROXY PROPIOPHENONE." RASAYAN Journal of Chemistry 15, no. 03 (2022): 1718–27. http://dx.doi.org/10.31788/rjc.2022.1536355.

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A new series of metal complexes of innovative bisketimines (L1 - L5) have been synthesized. Schiff base ligands were synthesized by condensing substituted 2’- hydroxy propiophenone and ethylene diamine. The synthesized Schiff bases act as tetradentate ligands with two nitrogen and two phenolic oxygen groups and co-ordinates with Co (II), Ni (II), Cu (II) and Zn (II) salts. Ligands and their metal complexes have been studied using 1H NMR, IR, UV-Vis and thermogravimetric techniques. The complexes were crystalline, according to the XRD pattern. The thermogravimetric data revealed the thermal sta

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Hall, C. Dennis, Niki Sachsinger, Stanley C. Nyburg, and Jonathan W. Steed. "Redox-active Schiff base ligands." Journal of Organometallic Chemistry 561, no. 1-2 (1998): 209–19. http://dx.doi.org/10.1016/s0022-328x(98)00530-0.

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Sharma, Shobhana, Poonam Yadav, Seema, Suman Kumari, and Mamta Ranka. "MICROWAVE-ASSISTED SYNTHESIS OF SCHIFF BASE AND MIXED LIGAND COMPLEXES OF Cr(III): COMPARISON WITH CONVENTIONAL METHOD AND ANTIMICROBIAL STUDIES." RASAYAN Journal of Chemistry 16, no. 02 (2023): 884–91. http://dx.doi.org/10.31788/rjc.2023.1628228.

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The Sustainable/Greener approach is prioritized over the conventional approach because of its environment-friendly, less time-consuming, less energy-consuming, less hazardous compounds synthesis, and low expenditure. Using a greener approach involving the use of microwave, Cr complexes were synthesized from Schiff base and various bidentate ligands and compared with conventional methods. Condensing 2-amino pyridine and isatin produced Schiff base. Complexes of Cr(III) were synthesized by using some bio-potent secondary ligands with Schiff base. Both Schiff base and complexes were characterized

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Yamgar, Ramesh S., Y. Nivid, Satish Nalawade, Mustapha Mandewale, R. G. Atram, and Sudhir S. Sawant. "Novel Zinc(II) Complexes of Heterocyclic Ligands as Antimicrobial Agents: Synthesis, Characterisation, and Antimicrobial Studies." Bioinorganic Chemistry and Applications 2014 (2014): 1–10. http://dx.doi.org/10.1155/2014/276598.

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The synthesis and antimicrobial activity of novel Zn(II) metal complexes derived from three novel heterocyclic Schiff base ligands 8-[(Z)-{[3-(N-methylamino)propyl]imino}methyl]-7-hydroxy-4-methyl-2H-chromen-2-one, 2-[(E)-{[4-(1H-1,2,4-triazol-1-ylmethyl)phenyl]imino}methyl]phenol, and (4S)-4-{4-[(E)-(2-hydroxybenzylidene)amino]benzyl}-1,3-oxazolidin-2-one have been described. These Schiff base ligands and metal complexes are characterised by spectroscopic techniques. According to these data, we propose an octahedral geometry to all the metal complexes. Antimicrobial activity of the Schiff bas

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ALI, Safaa Hussein, Hassan Mwazi ABD ALREDHA, and Haider Sabah ABDULHUSSEIN. "ANTIBIOTIC ACTIVITY OF NEW SPECIES OF SCHIFF BASE METAL COMPLEXES." Periódico Tchê Química 17, no. 35 (2020): 837–59. http://dx.doi.org/10.52571/ptq.v17.n35.2020.71_ali_pgs_837_859.pdf.

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Bacterial resistance is a growing challenge facing drug design scientists to find new medications or update commonly used antibiotics. The objective of this study was to synthesize, structure and highlight biological features of new species of metal-organic complexes [(MCl2))2)L1)] {M = Ni, Cu, L1) = N,N’-1,4- Phenylenebis(methanylylidene)bis(ethane-1,2-diamine)} and [(NiCl2))2)L2)]. The Schiff base ligands were prepared in an excellent yeilds by adding terephthalaldehyde to 1,2-ethane-diamine or 1,4-butane-diamine. Three binuclear Schiff base metal complexes were synthesized in a simple one-p

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Yeole, Sanjay, Vaibhava Sachin More, S. Lokhande R., Suhas Janwadkar, and Dilip Yadav. "Synthesis, Spectral, and Antimicrobial Activity of Some Mixed Ligand Co (II) Complexes of Schiff Base 2-[(3-Hydroxy Phenylimino) Methyl]-4-Nitrophenol with Some Amino Acids." International Journal of Advance and Applied Research 6, no. 25 (2025): 150–55. https://doi.org/10.5281/zenodo.15294469.

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<strong>Abstract:</strong> The mixed ligand complexes of Co (II) with 2-[(3-hydroxy phenylimino)methyl]-4-nitrophenol (HPIMNP) as the primary ligand and amino acids (valine, alanine, or glutamine) as secondary ligands have been synthesised and characterised. The complexes were characterised by elemental analysis, conductivity measurement, 1H NMR, IR, and ultraviolet-visible spectral studies. Schiff base acts as a bidentate ligand, coordinating through deprotonated phenolic oxygen and azomethine <em>N</em>-atom. The conductivity studies of the complexes in DMSO at 10⁻³ M concentration indi

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Lumsden, Simone E. A., Gummadi Durgaprasad, Keren A. Thomas Muthiah, and Michael J. Rose. "Tuning coordination modes of pyridine/thioether Schiff base (NNS) ligands to mononuclear manganese carbonyls." Dalton Trans. 43, no. 28 (2014): 10725–38. http://dx.doi.org/10.1039/c4dt00600c.

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Manganese carbonyls are ligated by pyridine/thioether Schiff base (NNS) ligands. Coordination of the thioether-S donor to the Mn(i) center is determined by subtle steric changes at the ligand periphery.

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Sreenivas, V., G. Srikanth, Ch Vinutha, M. Shailaja, P. Muralidhar Reddy, and Ravinder Vadde. "Synthesis, Spectral Characterization and Antimicrobial Studies of Co(II) Complexes with Tetradentate Schiff bases Derived from Ortho-Phthalaldehyde." JOURNAL OF ADVANCES IN CHEMISTRY 9, no. 1 (2016): 1873–82. http://dx.doi.org/10.24297/jac.v9i1.2852.

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A series of cobalt (II) complexes have been synthesized with Schiff bases derived from ortho-phthalaldehyde and various amines in aqueous methanol solution. The newly synthesized Schiff bases and their Co (II) complexes have been characterized by elemental analysis, magnetic susceptibility, thermal, conductance measurements, mass, IR, electronic, 1H,13C-NMR spectral techniques. These ligands act as tetradentate species and coordinate to the metal center through the different potential donor atoms such as N, O and S. The probable octahedral structures have been assigned to these complexes. All

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Yadav, Jyoti, and Jai Devi. "Antimicrobial and Antioxidant Activities of Diorganotin(IV) Complexes Synthesized from 1,2,4-Triazole Derivatives." Asian Journal of Chemistry 32, no. 10 (2020): 2553–58. http://dx.doi.org/10.14233/ajchem.2020.22819.

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Novel diorganotin(IV) complexes were synthesized from 1,2,4-triazole Schiff base ligands which were synthesized by reaction between the 4-amino-5-phenyl-1,2,4-triazole-3-thiol and salicyaldehyde derivatives. The bonding and geometry of the diorganotin(IV) complexes were evaluated by using different spectroscopic techniques such as FT-IR, mass, 1H, 13C & 119Sn NMR. The different spectroscopic techniques revealed the tridentate (ONS) mode of chelation of Schiff base ligands and pentacoordinated environment around the central tin metal which was satisfied with azomethine nitrogen, phenolic ox

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Varshney, Anshita, and A. P. Mishra. "Novel Ni(II) and Zn(II) Schiff base metal chelates as promising DNA binder, Antioxidant and Antifungal agents." Mediterranean Journal of Chemistry 14, no. 2 (2024): 94. http://dx.doi.org/10.13171/mjc02405211777varshney.

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<p>Schiff base ligands and their 3d-metal chelates have gained significant attention due to various applications in various scientific platforms. Due to their chelating propensity, they possess a wide range of biological, biochemical, catalytic, clinical, dying, and pharmacological properties.<strong> </strong>Here, in present studies,<strong> </strong>two novel Ni(II) and Zn(II) transition metal chelates have been synthesized by condensing their metal salts with Schiff base ligand 4-chloro-2-(2,5-dimethoxybenzylideneamino)-5-nitrophenol<strong> </strong&

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Ejidike, Ikechukwu P., and Peter A. Ajibade. "Transition metal complexes of symmetrical and asymmetrical Schiff bases as antibacterial, antifungal, antioxidant, and anticancer agents: progress and prospects." Reviews in Inorganic Chemistry 35, no. 4 (2015): 191–224. http://dx.doi.org/10.1515/revic-2015-0007.

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AbstractThe huge research on Schiff base coordination complexes in the past few decades has given rise to several new molecules that have been of biological importance. The ease with which the Schiff base ligands are designed and prepared and their pattern is elucidated have made them to be referred to as “fortunate ligands” possessing azomethine derivatives, the C=N linkage that is essential for biological activity, including antibacterial, antifungal, antioxidant, anticancer, and diuretic activities. A variety of Schiff base and its complexes have been studied as model molecules for biologic

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