A series of entangled Cd(II) coordination polymers assembled from different dicarboxylate acids and a flexible imidazole-based ligand

Tang

2020

Applied Organom Chemis

Two new d 10 metal-organic frameworks based on a novel semi-rigid aromatic biscarboxylate ligand, namely, [Zn (RGAA)(BPY) 1/2 ] (1) and [Cd 5 (μ 3-OH) 2 (RGAA) 4 ] (2) [H 2 RGAA = 4-(carboxymethyl)-2-ethoxybenzoic acid, BPY = 4,4 0-bipyridine], have been synthesized by the hydrothermal reaction, and characterized by Fourier transform-infrared, elemental analyses, X-ray single-crystal diffraction, powder X-ray diffraction and thermogravimetric analyses. Complex 1 displays a three-dimensional (3D) network with a (2,3,4)connected (6ˆ3.8ˆ2.10) 2 (6ˆ3) 2 (8) topology, while complex 2 exhibits a 3D framework with a (3,10)-connected (3.4.5) 2 (3ˆ4.4ˆ6.5ˆ18.6ˆ14.7ˆ2.8) topology. The luminescent properties of compounds 1 and 2 have been investigated in detail, where the emission maxima are 464 and 349 nm, respectively.

Section: Resultsmentioning

confidence: 99%

Two d¹⁰ metal–organic frameworks based on a novel semi‐rigid aromatic biscarboxylate ligand: Syntheses, structures and luminescent properties

Tang

2020

Applied Organom Chemis

“…[ 18,19 ] Polymeric Cd(II) complexes reported previously are based mainly on polypyridyl and carboxylate based ligands. [ 11–15 ] Further, previously reported Cd(II) polymeric complexes are mostly heteroleptic and contains bridging units (NCS or N 3 ). [ 11–17 ] Coordination polymer of Cd(II) with homoleptic ligand are relatively rare.…”

Section: Introductionmentioning

confidence: 99%

Cd(II) complexes derived from thiazoline, hydrazide and carbodithioate ligands: synthesis, crystal structures and electrochemical sensing of uric acid

Jaiswal

Pandey

Prajapati

et al. 2023

Applied Organom Chemis

Three novel Cd(II) metal complexes 1-3 have been synthesized with different derivatives of thiazoline, hydrazide and carbodithioate. These metal complexes are abbreviated as [Cd (tht) 2 ] n , [Cd (Hpph) 2 ] n and [Cd (mpps) 2 ] n along with their respective ligands Htht, H 2 pph and mpps. The developed metal complexes are characterized using X-ray diffraction (XRD) data and other spectroscopic techniques (Infrared [IR], nuclear magnetic resonance [NMR], ultraviolet-visible [UV-vis] and fluorescence). The polymeric nature of these cadmium complexes have been ascertained by single XRD data. Several significant interactions were also revealed, which aid in the stabilization of these complexes' supramolecular architecture. Comparing complex 2 with complexes 1 and 3, the absorption spectra of complex 2 exhibits a greater λmax.On comparing the fluorescence study of these complexes, complex 2 has a higher fluorescence than complexes 1 and 3. The cyclic voltammetry (CV) approach was employed to detect the electrochemical behaviour of these complexes, as well as the sensing of uric acid (UA) by these complexes via modified glassy carbon electrodes (GCEs). According to the conclusions received by CV study, the modified electrode containing complex 3 has admirable UA electro catalytic activity. This UA electrochemical sensing device offers a low detection limit (0.3 μM), fine linear ranges (30-1500 μM), reasonable sensitivity, and a fast reaction time.

“…Some Cd(II) complexes have been reported to possess interesting anticancer activity similar to cisplatin [11,15]. From a structural point of view, Cd(II) ion has varied coordination numbers due to its high affinity to form coordinate bonds with a diverse type of ligands, forming a wide range of coordination complexes [16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

X-ray Structure Analyses and Biological Evaluations of a New Cd(II) Complex with S-Triazine Based Ligand

et al. 2022

The crystal structure of a new penta-coordinated Cd(II) complex of the formula [Cd(BPMT)Br2] was presented. This Cd(II) complex was synthesized by mixing Cd(NO3)2·4H2O and 2,4-bis(3,5-dimethyl-1H-pyrazol-1-yl)-6-methoxy-1,3,5-triazine (BPMT) in the presence of KBr. It crystallized in the monoclinic crystal system and P21/n space group. The crystal parameters are a = 11.3680(8) Å, b = 11.1648(8) Å, c = 15.8593(11) Å, and β = 103.563(2)°, while the unit cell volume is 2190.6(12) Å3 and it comprised four molecules. The supramolecular structure of the [Cd(BPMT)Br2] complex is mainly controlled by the intermolecular Br∙∙∙H interactions. Hirshfeld calculations predicted the H∙∙∙H (38.1%), Br∙∙∙H (24.3%), C∙∙∙H (11.1%), and N∙∙∙H (9.5%) interactions are the most dominant. Biological evaluations for the antimicrobial and anticancer properties of the studied complex are presented. The Cd(II) complex has better anticancer and antibacterial activities than the free BPMT ligand. The anticancer activity against lung carcinoma (A-549) is higher for the former (18.64 ± 1.09 µg/mL) compared to the latter (372.79 ± 13.64 µg/mL). Additionally, the best antibacterial activity for the Cd(II) complex was found against B. subtilis.