scholarly journals On the Aggregation and Sensing Properties of Zinc(II) Schiff-Base Complexes of Salen-Type Ligands

Molecules ◽  
2019 ◽  
Vol 24 (13) ◽  
pp. 2514 ◽  
Author(s):  
Consiglio ◽  
Oliveri ◽  
Failla ◽  
Di Bella
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Coordination Compounds ◽  
Cell Imaging ◽  
Spectroscopic Properties ◽  
Lewis Base ◽  
Schiff Base Complexes ◽  
Sensing Properties ◽  
Lewis Bases

The zinc(II) ion forms stable complexes with a wide variety of ligands, but those related to Schiff-bases are among the most largely investigated. This review deals with the peculiar aggregation characteristics of Zn(II) Schiff-base complexes from tetradentate N2O2 salen-type ligands, L, derivatives from salicylaldehydes and 1,2-diamines, and is mostly focused on their spectroscopic properties in solution. Thanks to their Lewis acidic character, ZnL complexes show interesting structural, nanostructural, and aggregation/deaggregation properties in relation to the absence/presence of a Lewis base. Deaggregation of these complexes is accompanied by relevant changes of their spectroscopic properties that can appropriately be exploited for sensing Lewis bases. Thus, ZnL complexes have been investigated as chromogenic and fluorogenic chemosensors of charged and neutral Lewis bases, including cell imaging, and have shown to be selective and sensitive to the Lewis basicity of the involved species. From these studies emerges that these popular, Lewis acidic bis(salicylaldiminato)Zn(II) Schiff-base complexes represent classical coordination compounds for modern applications.

Lewis acidic zinc(II) salen-type Schiff-base complexes: sensing properties and responsive nanostructures

2021 ◽  
Author(s):  
Santo Di Bella
Keyword(s):  
Schiff Base ◽  
Schiff Base Complexes ◽  
Sensing Properties

In this frontier article some peculiar characteristics of Zn(salen)-type Schiff-base complexes are reviewed. The paper is mainly focused on the most recent and relevant achievements on responsive supramolecular nanostructures and...

Notizen: Magnetic Studies on Schiff Base Complexes of Al(III) and Si(IV)

1974 ◽  
Vol 29 (7-8) ◽  
pp. 565-566 ◽  
Author(s):  
R. N. Prasad ◽  
J. P. Tandon
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Schiff Base Complexes ◽  
Magnetic Studies ◽  
Magnetic Susceptibilities

The magnetic susceptibilities of some newly syntesized Al(III) and Si(IV) complexes of Schiff bases derived from the condensation of o-hydroxyacetophenone or 2-dydroxy-1-naphthaldehyde with hydroxyalkylamines or diamines have been measured and the data indicate their diamagnetic character.

Electronic Structure of Pseudotetrahedral Copper(II) Schiff Base Complexes

1977 ◽  
Vol 32 (5) ◽  
pp. 551-561 ◽  
Author(s):  
John R. Wasson ◽  
H. Wayne Richardson ◽  
William E. Hatfield
Keyword(s):  
Electronic Structure ◽  
Schiff Base ◽  
Schiff Bases ◽  
Opposite Direction ◽  
Hyperfine Coupling ◽  
Coupling Constants ◽  
Schiff Base Complexes ◽  
Hyperfine Coupling Constants ◽  
Structure Correlations

Copper(II) complexes with the Schiff bases formed by condensing t-butyl-, isopropyl-, cyclohexyl- and diphenylmethylamines with salicylaldehyde and 3-methoxy- and 5-nitrosalicyl-aldehyde have been prepared and characterized. The isotropic nuclear hyperfine coupling constants increase in the order t-butyl < isopropyl < cyclohexyl < diphenylmethyl for the N-substituents in the three series of complexes while isotropic g-values increased in the opposite direction. Spectra structure correlations were examined and discussed.

ChemInform Abstract: LANTHANID COMPOUNDS WITH SCHIFF BASES AND WITH COPPER(II) SCHIFF BASE COMPLEXES AS LIGANDS

1975 ◽  
Vol 6 (15) ◽  
pp. no-no
Author(s):  
G. CONDORELLI ◽  
I. FRAGALA ◽  
S. GIUFFRIDA ◽  
A. CASSOL
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Schiff Base Complexes

Magnetic and spectral properties of two five-coordinate Lewis-base adducts of cobalt(II) Schiff-base complexes with a N3O2 ligand environment

Polyhedron ◽  
2000 ◽  
Vol 19 (13) ◽  
pp. 1643-1648 ◽  
Author(s):  
Floriana Tuna ◽  
Luminita Patron* ◽  
Eric Rivière ◽  
Marie-Laure Boillot*
Keyword(s):  
Schiff Base ◽  
Spectral Properties ◽  
Lewis Base ◽  
Schiff Base Complexes ◽  
Ligand Environment

scholarly journals Synthesis, Spectroscopic, Molecular Structure, and Antibacterial Studies of Dibutyltin(IV) Schiff Base Complexes Derived from Phenylalanine, Isoleucine, and Glycine

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Har Lal Singh ◽  
Jangbhadur Singh
Keyword(s):  
Amino Acids ◽  
Schiff Base ◽  
Schiff Bases ◽  
Molar Conductance ◽  
Schiff Base Complexes ◽  
Spectral Studies ◽  
E Coli ◽  
Elemental Analyses ◽  
In Vitro Antibacterial Activity

New series of organotin(IV) complexes and Schiff bases derived from amino acids have been designed and synthesized from condensation of1H-indole-2,3-dione, 5-chloro-1H-indole-2,3-dione, andα-amino acids (phenylalanine, isoleucine, and glycine). All compounds are characterized by elemental analyses, molar conductance measurements, and molecular weight determinations. Bonding of these complexes is discussed in terms of their UV-visible, infrared, and nuclear magnetic resonance (1H,13C, and119Sn NMR) spectral studies. The results suggest that Schiff bases behave as monobasic bidentate ligands and coordinate with dibutyltin(IV) in octahedral geometry according to the general formula [Bu2Sn(L)2]. Elemental analyses and NMR spectral data of the ligands with their dibutyltin(IV) complexes agree with their proposed distorted octahedral structures. Few representative compounds are tested for their in vitro antibacterial activity against Gram-positive (B. cereus,Staphylococcusspp.) and Gram-negative (E. coli,Klebsiellaspp.) bacteria. The results show that the dibutyltin complexes are more reactive with respect to their corresponding Schiff base ligands.

scholarly journals Synthesis and Characterization of New Homo- and Heteronuclear Schiff Base Complexes

Proceedings ◽  
2019 ◽  
Vol 29 (1) ◽  
pp. 77
Author(s):  
Spinciu ◽  
Maxim ◽  
Pătrașcu ◽  
Popescu
Keyword(s):  
Schiff Base ◽  
Schiff Bases ◽  
Chemical Elements ◽  
Schiff Base Complexes ◽  
Oxidation States ◽  
Synthesis And Characterization

Schiff bases are the most extensively used versatile ligands, capable of coordinating several chemical elements and stabilizing them in numerous oxidation states. [...]

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