Synthesis, spectral, crystallography and thermal investigations of novel Schiff base complexes of manganese (III) derived from heterocyclic β-diketone with aromatic and aliphatic diamine

Surati, Kiran R.; Thaker, B. T.

doi:10.1016/j.saa.2009.10.018

Cited by 58 publications

(18 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The measurements of molecular electronic spectra were used to assign the stereochemistries of metal ions in the metal chelates depending on the sites and number of d–d transition peaks. The electronic absorption spectra of ligands and their metal chelates were measured in the wavelength range 200–800 nm and at 298 K. The ligand exhibits an absorption band in UV–visible area around 400 nm which is attributed to n → π* transition originating from azomethine group of the ligand . The absorption bands of complexes at λ max = 318–484 nm correspond to charge transfer from HNA imine ligand to the metal ion.…”

Section: Resultsmentioning

confidence: 99%

Some new Ag(I), VO(II) and Pd(II) chelates incorporating tridentate imine ligand: Design, synthesis, structure elucidation, density functional theory calculations for DNA interaction, antimicrobial and anticancer activities and molecular docking studies

Abdel‐Rahman

Abu‐Dief

Shehata

et al. 2019

Applied Organom Chemis

117

View full text Add to dashboard Cite

Some new complexes derived from VO(II), Ag(I) and Pd(II) metal ions and HNA imine ligand (L), i.e. (2‐((6‐allylidene‐2‐hydroxycyclohexa‐1,3‐dienylmethylene)amino)benzoic acid), have been prepared and their structures elucidated via molar conductance measurements, elemental analyses, infrared, NMR and electronic spectra and magnetic susceptibility estimations. Moreover, stability constants of the synthesized complexes were evaluated utilizing a spectrophotometric technique. On the basis of molar conductance and elemental analyses, the metal imine chelates have structure [M(L)], where M = Pd(II), VO(II) and Ag(I). The results indicate that the prepared HNA imine ligand acts as a tridentate moiety via nitrogen atom of azomethine group and two oxygen atoms of phenolic and carboxylic groups. All the complexes are found to be monomeric with 1:1 stoichiometry with square planar geometry for Pd(II), tetrahedral geometry for Ag(I) and distorted square pyramidal for VO(II). Theoretical density functional theory calculations were applied to verify the molecular geometry of the chelators and their metal chelates. The geometry optimization results are in agreement with experimental observations. The antimicrobial properties of the prepared HNA imine ligand and its metal chelates were evaluated against numerous plant pathogenic fungi and bacteria. The results of these studies indicate that the metal complexes exhibit a stronger antibacterial and antifungal effect compared to the imine ligand. In addition, the interaction of the metal imine chelates with calf thymus DNA was observed by way of viscosity, gel electrophoreses and spectral studies. Absorption titration studies reveal that each of the complexes is an avid binder to calf thymus DNA. Also, there are appreciable changes in the relative viscosity of DNA, which are consistent with enhanced hydrophobic interaction of the aromatic rings and intercalation mode of binding. Additionally, the cytotoxic activity of the investigated compounds against various cancer cell lines shows promising results which makes them prospective compounds for antibiotic and anticancer medicament studies. Furthermore, docking studies of the prepared compounds were conducted for confirming the biological results.

show abstract

Section: Resultsmentioning

confidence: 99%

Some new Ag(I), VO(II) and Pd(II) chelates incorporating tridentate imine ligand: Design, synthesis, structure elucidation, density functional theory calculations for DNA interaction, antimicrobial and anticancer activities and molecular docking studies

Abdel‐Rahman

Abu‐Dief

Shehata

et al. 2019

Applied Organom Chemis

117

View full text Add to dashboard Cite

show abstract

“…[15] The strong band in the Schiff base at 1634 cm --1 underwent a negative shift of about 10--15 cm --1 in the complexes, confirming the coordination of the azomethine N atoms to the metal atoms. [16] The intense absorption at 2079 cm --1 in the spectrum of 2 is due to the vibration of the thiocyanate ligands. The weak absorption …”

Section: Resultsmentioning

confidence: 99%

Synthesis, crystal structures, and antibacterial activities of manganese(II) and copper(II) complexes derived from 2-bromo-4-chloro-6-[(2-hydroxyethylimino)methyl]phenol

Zhang

2016

Inorganic and Nano-Metal Chemistry

View full text Add to dashboard Cite

Reaction of the tridentate Schiff base 2-bromo-4-chloro-6-[(2-hydroxyethylimino)methyl]phenol (HL) with manganese and copper salts in the presence of ammonium thiocyanate in methanol afforded a new mononuclear complex, [MnL 2 ]·0.5H 2 O (1), and a new dinuclear complex, [Cu 2 L 2 (NCS) 2 ] (2). The complexes were characterized by single-crystal X-ray diffraction, FT-IR, and elemental analysis. The Mn atom in complex 1 is coordinated by two tridentate Schiff base ligands, forming octahedral coordination. The Cu atom in complex 2 is coordinated by one tridentate Schiff base ligand, and two thiocyanate ligands, forming square pyramidal coordination. The free Schiff base and the complexes were assayed for antibacterial activities.Both complexes are more active against the bacteria than the free Schiff bases. Complex 2 has the MIC value of 0.20 μg mL --1 against Bacillus subtilis.

show abstract

“…Kompleks 1'de ise görünür bölgede maksimum 452 nm dalga boyunda mor emisyon bandı görülmektedir. Kompleks 1 ile H2L ligandı benzer emisyon bandları gösterdiği için, kompleksin gözlenen emisyonuna da ligand kaynaklı nπ* veya ππ* elektronik geçişi katkıda bulunmaktadır [38,39].…”

Section: Kompleks 1 'In Fotolüminesans öZellikleriunclassified

“…Kompleks 1 ile H2L ligandının emisyon spektrumları karşılaştırıldığında, ligand ile metal atomunun koordinasyon etkisinden dolayı maksimum emisyon bandının yeşilden mor bölgeye kaydığı görülmektedir [39,40]. Kompleks 1'in emisyon bandı H2L ligandına göre daha şiddetlidir.…”

Section: Kompleks 1 'In Fotolüminesans öZellikleriunclassified

See 1 more Smart Citation

Cu<sub>4</sub>O<sub>4</sub> Kübik Formdaki Bakır (II) Kompleksinin Yapısal ve Fotolüminesans Özelliklerinin İncelenmesi

Güngör

2017

SDÜ Fen Bil Enst Der

View full text Add to dashboard Cite

Özet: Polimerik bakır (II) komplekslerinin tasarımı ve sentezi, moleküler biyoloji, manyetizma ve fotolüminesans alanlarındaki potansiyel uygulamalarından dolayı büyük ilgi uyandırmaktadır. Bu çalışmada, fotolüminesans özellikler gösteren {Cu4O4} kübik formda, C38H40Cl4Cu4N4O10 (1) kompleksi rapor edilmektedir. Kompleks 1, solvotermal reaksiyon ile sentezlendi ve element analizi, FT-IR, katı UV-Vis spektroskopisi ve tek kristal X ışını kırınımı ile karakterize edildi. Kristal yapı çalışmaları, kompleks 1 in kristal yapısındaki dört çekirdekli birimdeki bakır(II) iyonlarının bozulmuş kare piramit geometriye sahip olduğunu gösterdi. Kompleks 1 ve ligandı H2L'nin katı durumdaki fotolüminesans özellikleri ise görünür bölgede oda sıcaklığında incelendi. Kompleks 1 ve ligandı H2L UV ışık ile 349 nm de uyarıldığı zaman, kompleks 1 görünür bölgede 452 nm'de şiddetli mor emisyon gösterirken, ligandı H2L 504 nm'de yeşil emisyon göstermektedir. Bu umut verici fotolüminesans davranış, bu tip bileşikler için duyarlı moleküler cihazlar veya organik ışık yayan diyotlar (OLEDs) için olası uygulamalara kapı açmaktadır. Investigation of Abstract:The design and synthesis of polymeric coordination copper(II) complexes are of great interest due to potential applications in the areas of molecular biology, magnetism and photoluminescence. In this study, reports the cubane-type {M4O4} complex of the formula C38H40Cl4Cu4N4O10 (1) showing photoluminescence properties. Complex 1 has been synthesised by the solvothermal reaction and characterized by element analysis, FT-IR, solid UV-Vis spectroscopy and single crystal X-ray diffraction. Crystal structural studies show that the Cu(II) centres in the tetrameric unit in complex 1 adopt distorted squarepyramidal geometries. The solid state photoluminescence properties of complex 1 and its ligand H2L have been investigated at room temperature in the visible region. When complex 1 and its ligand H2L are excited under UV light at 349 nm, complex 1 displays a strong violet emission at 452 nm and its ligand H2L displays green emission at 504 nm in the visible region. This promising luminescent behavior opens up possible applications for these compounds as sensing molecular devices or organic light emitting diodes (OLEDs).

show abstract

Synthesis, spectral, crystallography and thermal investigations of novel Schiff base complexes of manganese (III) derived from heterocyclic β-diketone with aromatic and aliphatic diamine

Cited by 58 publications

References 25 publications

Some new Ag(I), VO(II) and Pd(II) chelates incorporating tridentate imine ligand: Design, synthesis, structure elucidation, density functional theory calculations for DNA interaction, antimicrobial and anticancer activities and molecular docking studies

Some new Ag(I), VO(II) and Pd(II) chelates incorporating tridentate imine ligand: Design, synthesis, structure elucidation, density functional theory calculations for DNA interaction, antimicrobial and anticancer activities and molecular docking studies

Synthesis, crystal structures, and antibacterial activities of manganese(II) and copper(II) complexes derived from 2-bromo-4-chloro-6-[(2-hydroxyethylimino)methyl]phenol

Cu<sub>4</sub>O<sub>4</sub> Kübik Formdaki Bakır (II) Kompleksinin Yapısal ve Fotolüminesans Özelliklerinin İncelenmesi

Contact Info

Product

Resources

About