Correction: Mahmoudi et al. Solvent-Induced Formation of Novel Ni(II) Complexes Derived from Bis-Thiosemicarbazone Ligand: An Insight from Experimental and Theoretical Investigations. 2021, , 5337.

We received a complaint from the Université Catholique de Louvain [...

The anticancer properties of metal-organic frameworks and their heterogeneous nanocomposites.

Herein, silver-based metal-organic framework (AgMOF) and its graphene oxide (GO)-decorated nanocomposite (GO-AgMOF) are proposed for use in emerging biomedical applications. The nanocomposites are characterized, and hence, in vitro apoptotic and antibacterial features of AgMOF and GO-AgMOF nanomaterials were investigated. An MTT cytocompatibility assay indicates that these nanomaterials have dose-dependent toxicity in contact with SW480, colon adenocarcinoma cells.

Solvent-Induced Formation of Novel Ni(II) Complexes Derived from Bis-Thiosemicarbazone Ligand: An Insight from Experimental and Theoretical Investigations.

In this work, we report solvent-induced complexation properties of a new NS tetradentate bis-thiosemicarbazone ligand (), prepared by the condensation of 4-phenylthiosemicarbazide with bis-aldehyde, namely 2,2'-(ethane-1,2-diylbis(oxy)dibenzaldehyde, towards nickel(II). Using ethanol as a reaction medium allowed the isolation of a discrete mononuclear homoleptic complex (), for which its crystal structure contains three independent molecules, namely , and , in the asymmetric unit. The doubly deprotonated ligand in the structure of is coordinated in a cis-manner through the azomethine nitrogen atoms and the thiocarbonyl sulfur atoms.

Lead(ii) coordination polymers driven by pyridine-hydrazine donors: from anion-guided self-assembly to structural features.

In this work, we report extensive experimental and theoretical investigations on a new series of PbII coordination polymers exhibiting extended supramolecular architectures, namely [Pb2(LI)(NCS)4]n (1), [Pb(HLII)I2]n (2), [Pb(LIII)I]n (3) and [Pb(HLIV)(NO3)2]n·nMeOH (4), which were self-assembled from different PbII salts and various pyridine-hydrazine based linkers, namely 1,2-bis(pyridin-3-ylmethylene)hydrazine (LI), (pyridin-4-ylmethylene)isonicotinohydrazide (HLII), 1-(pyridin-2-yl)ethylidenenicotinohydrazide (HLIII) and phenyl(pyridin-2-yl)methylenenicotinohydrazide (HLIV), respectively. It is recognized that the origin of self-assembling is fundamentally rooted in a dual donor (6s2/6p0 hybridized lone electron pair) and electrophilic behaviour of PbII. This allows production of extended topologies from a 1D polymeric chain in 4 through a 2D layer in 2 to the 3D frameworks in 1 and 3, predominantly due to the cooperative action of both covalent and non-covalent tetrel interactions of the overall type Pb-X (X = O, N, S, I).

Correction: Structural versatility of the quasi-aromatic Möbius type zinc(ii)-pseudohalide complexes - experimental and theoretical investigations.

[This corrects the article DOI: 10.1039/C9RA05276C.].

Crystal structure and Hirshfeld surface analysis of di-iodido-{'-[()-(phen-yl)(pyridin-2-yl-κ)methylidene]pyridine-2-carbohydrazide-κ ',}cadmium(II).

In each of the two independent mol-ecules in the asymmetric unit of the title compound, [CdI(CHNO)], the ,,'-tridentate '-[()-(phen-yl)(pyridin-2-yl-κ)methyl-idene]pyridine-2-carbohydrazide ligand and two iodide anions form an INO penta-coordination sphere, with a distorted square-pyramidal geometry, with an I atom in the apical position. Both mol-ecules feature an intra-molecular N-H⋯N hydrogen bond. In the crystal, weak aromatic π-π stacking inter-actions [centroid-centroid separation = 3.

Structural versatility of the quasi-aromatic Möbius type zinc(ii)-pseudohalide complexes - experimental and theoretical investigations.

In this contribution we report for the first time fabrication, isolation, structural and theoretical characterization of the quasi-aromatic Möbius complexes [Zn(NCS)L] (1), [Zn(μ-N)(L)][ZnCl(MeOH)]·6MeOH (2) and [Zn(NCS)L][Zn(NCS)]·MeOH (3), constructed from 1,2-diphenyl-1,2-bis((phenyl(pyridin-2-yl)methylene)hydrazono)ethane (L) or benzilbis(acetylpyridin-2-yl)methylidenehydrazone (L), respectively, and ZnCl mixed with NHNCS or NaN. Structures 1-3 are dictated by both the bulkiness of the organic ligand and the nature of the inorganic counter ion. As evidenced from single crystal X-ray diffraction data species 1 has a neutral discrete heteroleptic mononuclear structure, whereas, complexes 2 and 3 exhibit a salt-like structure.

Quasi-aromatic Möbius Metal Chelates.

We report the design as well as structural and spectroscopic characterizations of two new coordination compounds obtained from Cd(NO)·4HO and polydentate ligands, benzilbis(pyridin-2-yl)methylidenehydrazone (L) and benzilbis(acetylpyridin-2-yl)methylidenehydrazone (L), in a mixture with two equivalents of NHNCS in MeOH, namely [Cd(SCN)(NCS)(L)(MeOH)] (1) and [Cd(NCS)(L)(MeOH)] (2). Both L and L are bound via two pyridyl-imine units yielding a tetradentate coordination mode giving rise to the 12 π electron chelate ring. It has been determined for the first time (qualitatively and quantitatively), using the EDDB electron population-based method, the HOMA index, and the ETS-NOCV charge and energy decomposition scheme, that the chelate ring containing Cd can be classified as a quasi-aromatic Möbius motif.

Crystal structures of di-bromido-{-[(pyridin-2-yl-κ)methyl-idene]picolinohydrazide-κ',}cadmium methanol monosolvate and di-iodido{-[(pyridin-2-yl-κ)methyl-idene]picolinohydrazide-κ',}cadmium.

The title compounds, [CdBr(CHNO)]·CHOH, (I), and [CdI(CHNO)], (II), are cadmium bromide and cadmium iodide complexes of the ligand ()-'-(pyridin-2-yl-methyl-ene)picolinohydrazide. Complex (I) crystallizes as the methanol monosolvate. In both compounds, the Cd cation is ligated by one O atom and two N atoms of the tridentate ligand, and by two bromide anions forming a BrNO penta-coordination sphere for (I), and by two iodide anions forming an INO penta-coordination sphere for (II), both with a distorted square-pyramidal geometry.

Crystal structure of bis-{'-[()-4-hy-droxy-benzyl-idene]pyridine-4-carbohydrazide-κ}di-iodidocadmium methanol disolvate.

In the title compound, [Cd(CHINO)]·2CHOH, which crystallizes with = 4 in the space group , the Cd atom is located on a twofold rotation axis and coordinated by two I anions and two N atoms from the pyridine rings of the two '-[()-4-hy-droxy-benzyl-idene]pyridine-4-carbohydrazide ligands. The geometry around the Cd atom is distorted tetra-hedral, with bond angles in the range 94.92 (11)-124.

Di-μ-chlorido-bis-(chlorido-{N'-[phen-yl(pyridin-2-yl-κN)methyl-idene]pyridine-2-carbohydrazide-κ(2) N',O}cadmium).

The title compound, [Cd2Cl4(C18H14N4O)2], was obtained from the reaction of Cd(NO3)2·4H2O with 2-phenyl-pyridine-keton picolinoyl hydrazone and sodium chloride. Each Cd(2+) cation is coordinated by two N atoms and one O atom of the tridentate ligand and three chloride anions, forming a distorted CdNOCl3 octahedron. Each pair of adjacent metal cations is linked by two bridging chloride ligands, resulting in a dinuclear complex unit.

Dibromido{N'-[1-(pyridin-2-yl)ethyl-idene]picolinohydrazide-κ(2)N',O}cadmium.

The title compound, [CdBr(2)(C(13)H(12)N(4)O)], was obtained from the reaction of Cd(NO(3))(2)·4H(2)O with meth-yl(pyridin-2-yl)methanone picolinoylhydrazone and sodium bromide. The Cd(2+) cation is ligated by one O atom and two N atoms of the tridentate ligand and two bromide anions, forming a Br(2)CdN(2)O polyhedron with a distorted trigonal-bipyramidal coordination geometry. In the crystal, non-classical C-H⋯Br hydrogen bonds are observed.