Synthesis, crystal structures, and luminescent properties of Zn(<scp>ii</scp>), Cd(<scp>ii</scp>), Eu(<scp>iii</scp>) complexes and detection of Fe(<scp>iii</scp>) ions based on a diacylhydrazone Schiff base

Nan²,

et al. 2021

Russ J Gen Chem

Two Th(IV) complexes have been synthesized by a "one-pot" method. The complexes have been characterized by IR, NMR and mass spectra, elemental analysis, and single crystal X-ray diffraction. Structural analysis indicates that Th(IV) in both complexes is twelve-coordinated. A one-dimensional infinite chain structure is formed in C1 via π-π stacking of benzene. According to TGA, the complexes are stable below 200°C. UV-Vis and fluorescence spectra of complexes have been recorded. Quantum chemical calculations of the complexes have been carried out.

Section: Resultsmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Solvothermal Syntheses, Crystal Structure, and Properties of Two Th(IV) Complexes Based on Diacylhydrazone Ligand

Nan²,

et al. 2021

Russ J Gen Chem

“…The as-synthesis ligand and various types of derivatized transition metal complex show the different characteristic properties due to the few transition because of the ligand to metal transition. [42][43][44] the solution was prepared in an aqueous solution of the ethanol. The ligand and complex with dispersible in the ethanol solution and further used as fluorescence at the normal room temperature.…”

Section: Fluorescence Studiesmentioning

confidence: 99%

Synthesis and Properties of Transition Metal Complexes Containing Thiazole Derived Schiff Base Ligands

et al. 2022

Although ligands containing four donor atom are tetradentate ligand of Thiazole moiety which coordinated with transition metal ions. The complex of m-NTA and m-MTA are studies by different spectral technique. Here we are synthesizing the thiazole derivatives Schiff base as a ligands, L1 = N,N'E,N,N'E)-N,N'-(1,3- phenylene bis (methanylylidene) bis (5-nitrobenzo [d] thiazo L2-amine (NTA) and L2 = N,N'E,N,N'E)-N,N'-(1,3-phenylene bis (methanylylidene) bis (5-methyl thiazo L2-amine (MTA), and coordinated with transition metals ( Co, Ni, Cu, Zn, and Cd) using lone-pair coordination method. These synthesized complexes were identified by FT-IR spectra, UV-Visible spectra, mass spectra and cyclic voltammetry and having characteristic absorption and potential high-performance CV which show a different type of stable transition metal complex. The electrochemical study was also carried out for these complexes which show the clear redox behaviour of complexes. The significant change in CV properties is exhibited by CV graphs where we can see a prominent reduction peaks M (II) to M is showing at -0.4 V . We found that in the case of L2 there is less prominent reduction peaks observed in comparison to L1.

“…Schiff bases and their complexes are widely used in research fields such as catalysis, biological activity, analytical chemistry, and fluorescent functional materials. − We are interested in design and synthesis of tridentate and tetradentate Schiff bases. Their transition metal coordination complexes with fluorescent properties toward probes have been investigated. − It is noteworthy that the first example of fluorescent probe of MOF has been reported by our Lab., which can detect the small organic molecules and water molecule selectively . We have been designed and synthesized several types of Schiff base ligands including tridentate acylhydrazone and tetradentate salen/salphen Schiff base ligands.…”

Section: Introductionmentioning

confidence: 99%

Schiff Base-Modified Nanomaterials for Ion Detection: A Review

Zhong

Shi

et al. 2022

ACS Appl. Nano Mater.

Self Cite

Ion detection is crucial for environmental quality, human health, and industry development. Schiff bases and their complexes are widely applied as the probes for ion detection in chemistry, environment, and biology fields. There are many kinds of interesting Schiff bases and their coordination complexes that have been designed and synthesized based on the facile synthesis. Recently, Schiff base chemistry has intercrossed with nanomaterials toward wide applications. Nanomaterials are characterized by their sizes in the range of several nanometers to several hundreds of nanometers and then with large specific surface area. They have unusual properties such as mechanical property, optical property, and catalytic property, which are usually not active for their bulk materials. The development of new nanomaterials has dramatically increased in the past two decades, especially the hybridization of inorganic nanomaterials with organic functional species. Schiff base is a very famous class of organic molecules with diversity structures and properties. The remarkable point is that they are synthesized facilely. In this review, the principles and methods of Schiff base preparation have been scanned briefly. Then nanomaterials functionalized by Schiff base to achieve efficient, rapid, and sensitive recognition of ions were elaborated. The types of nanomaterials are included the metal–organic frameworks (MOFs) and covalent organic frameworks (COFs) constructed by Schiff base ligands with nanosized pores and surface modification of nanoparticles (NPs) with Schiff bases, which can not only retain the advantages of the original nanomaterials but also improve the ability of ion-specific recognition. The development of colorimetric, fluorescence, and electrochemical sensors based on Schiff base nanomaterials for ion detection in recent years was carefully summarized as well. It should be mentioned that the types of ions in this review are mainly metal ions. Finally, the challenges in the future in this field have been proposed.