Molecular design of mononuclear complexes of acyclic Schiff-base ligands

In this paper, we show a strategy to modify salphen-type Schiff base ligands with naphtol (SYML1) and pyrocathecol (2,3-dihydroxyphenyl) groups (SYML2), or a combination of both (ASYML). Each of these ligands can be used to obtain polynuclear metal complexes following two different strategies. One relies on using metals that are either too large for the N2O2 cavity or not fond of coordination number 4 and the other one relies on forcing the polynuclear species by adding functional groups to the hydroxybenzaldehayde in order to have extra coordination sites in the ligand. We report and characterize the mononuclear complexes SYML1-Cu and SYML1-Ce, along with the dinuclear complex SYML1-Fe and the tetranuclear species SYML2-Mn. The asymmetric ligand ASYML routinely hydrolyzes into the symmetric ligands in the reaction mixtures. SYML1-Fe displays a nearly linear Fe-O-Fe bridge with very strong antiferromagnetic coupling between the Fe(III) ions.

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Effects of structures of bidentate Schiff base type bonded-ligands derived from benzaldehyde on the photoluminescence performance of polymer–rare earth complexes

Physical Chemistry Chemical Physics ◽

10.1039/c7cp07590a ◽

2018 ◽

Vol 20 (6) ◽

pp. 4373-4385 ◽

Cited By ~ 1

Author(s):

Baojiao Gao ◽

Liqin Zhang ◽

Dandan Zhang

Keyword(s):

Schiff Base ◽

Rare Earth ◽

Glutamic Acid ◽

Molecular Design ◽

Functional Polymers ◽

Rare Earth Complexes ◽

Schiff Base Ligands ◽

Polymer Reactions

Two kinds of bidentate Schiff base ligands derived from benzaldehyde, benzaldehyde/m-aminophenol (BAMA) type and benzaldehyde/glutamic acid (BAGL) type ligands, were synchronously synthesized and bonded on the backbone of polysulfone (PSF) through molecular design and by polymer reactions, and two functional polymers, PSF-BAMA and PSF-BAGL, were obtained.

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Synthesis of two new N2O4 macroacyclic Schiff base ligands and their mononuclear complexes: Spectral, X-ray crystal structural, antibacterial and DNA cleavage activity

Polyhedron ◽

10.1016/j.poly.2015.02.029 ◽

2015 ◽

Vol 97 ◽

pp. 75-82 ◽

Cited By ~ 26

Author(s):

Hassan Keypour ◽

Amir Shooshtari ◽

Majid Rezaeivala ◽

Fatma Ozturk Kup ◽

Hadi Amiri Rudbari

Keyword(s):

Schiff Base ◽

Dna Cleavage ◽

Schiff Base Ligands ◽

X Ray ◽

Cleavage Activity ◽

Mononuclear Complexes ◽

Dna Cleavage Activity ◽

Crystal Structural

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Schiff base ligands derived from phenylenediamine and its metal complexes as enhancer against two mechanisms of antibiotic resistance

10.1055/s-0039-3400408 ◽

2019 ◽

Author(s):

NM Jaya ◽

NH Ismail ◽

ALM Low ◽

H Bahron ◽

PNAW Faizal ◽

...

Keyword(s):

Antibiotic Resistance ◽

Schiff Base ◽

Metal Complexes ◽

Schiff Base Ligands

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Conductivity Studies of Schiff Base Ligands Derived from O-Phenylenediamine and Their Co(II) and Zn(II) Complexes

Scientific Research Journal ◽

10.24191/srj.v12i2.5427 ◽

2015 ◽

Vol 12 (2) ◽

pp. 13

Author(s):

Muhamad Faridz Osman ◽

Karimah Kassim

Keyword(s):

Nuclear Magnetic Resonance ◽

Fourier Transform ◽

Schiff Base ◽

Nmr Spectroscopy ◽

Magnetic Resonance ◽

Impedance Spectroscopy ◽

Ftir Spectroscopy ◽

Coordination Complexes ◽

Frequency Range ◽

Schiff Base Ligands

The coordination complexes of Co(II) and Zn(II) with Schiff bases derived from o-phenylenediamine and substituted 2-hydroxybenzaldehyde were prepared All compounds were characterized by Fourier transform infrared (FTIR) spectroscopy and Nuclear magnetic resonance (NMR) spectroscopy elemental analyzers. They were analyzed using impedance spectroscopy in the frequency range of 100Hz-1 MHz. LI and L2 showed higher conductivity compared to their metal complexes, which had values of 1.3 7 x 10-7 and 6.13 x 10-8 S/cm respectively.

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Tetranuclear Copper and Mononuclear Nickel Complex of the Schiff Base of (3Z)-3-Hydrazonobutan-2-One Oxime with Different Aromatic Carbonyl Compounds: Synthesis, Single Crystal X-Ray Structure, Catecholase Activity, Phenoxazinone Synthase Activity, Catalytic Study for the Homocoupling of Benzyl Amines

10.26434/chemrxiv.9632036.v1 ◽

2019 ◽

Author(s):

Swaraj Sengupta ◽

Sahanwaj Khan ◽

Shyamal K. Chattopadhyay ◽

Indrani Banerjee ◽

Tarun K. Panda ◽

...

Keyword(s):

Schiff Base ◽

Single Crystal ◽

Copper Complex ◽

Carbonyl Compounds ◽

Nickel Complex ◽

Schiff Base Ligands ◽

X Ray ◽

Phenoxazinone Synthase ◽

Catecholase Activity ◽

Aromatic Carbonyl Compounds

Synthesis and characterisation of one trinuclear copper complex, ([Cu3L3O]ClO4) (1) and one nickel complex ([Ni(L'H)2(dmso)2](ClO4)2) (2) with Schiff base ligands: (3Z)-3-((Z)-(1-(thiophen-2-yl)ethylidene)hydrazono)butan-2-one oxime (LH) and 1-(pyridin-2-yl)ethylidene)hydrazono)butan-2-one oxime (L'H). 1 shows high catecholase activity and has also been tested as a catalyst for the synthesis of benzylimine. 2 shows phenoxazinone synthase activity.

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