41 Results Found

4-Amino-3,5-di-(4-pyridyl)-4H-1,2,4-triazole (1) and 3,5-di-(4-pyridyl)-1H-1,2,4-triazole (2) are potential multi-topic bridging ligands in preparation of coordination compounds of 1 – 3D structures.[...]

The coordination chemistry of 2-pyridyl ketoximes continues to attract the interest of many inorganic chemistry groups around the world for a variety of reasons. Cadmium(II) complexes of such ligands have provided models of solvent extraction of this...

9, 10-bis(3,5-dihydroxyphenyl)anthracene (BDHA) and 2,2′,4,4′-tetrahydroxybenzophenone (THB) are crystallized with bipyridine bases 4,4 ́-bipyridyl(bipy), 1,2-bis(4-pyridyl)ethane (bipy-eta), 1,2-di(4-pyridyl)ethylene (dipy-ete), 1,3-di(4-pyridyl)pro...

The factors affecting the self-assembly process in low molecular weight gelators (LMWGs) were investigated by tuning the gelation properties of a well-known gelator N-(4-pyridyl)isonicotinamide (4PINA). The N―H∙∙∙N interactions responsible for gel fo...

This work reports our first results in the area of the reactivity of coordinated chloroximes. The 1:2:2:2 Zn(NO₃)₂∙6H₂O/Eu(NO₃)₃∙6H₂O/ClpaoH/Et₃N reaction mixture in MeOH, where ClpaoH is pyridine-2-chloroxime, resulted in complex [ZnCl₂(L)] (1); L i...

Ten coordination polymers constructed from divalent metal salts, polycarboxylic acids, and bis-pyridyl-bis-amide ligands with different donor atom positions and flexibility are reported. They were structurally characterized by single-crystal X-ray di...

The synthesis of amide-based molecules, possessing pre-organized structures, has received significant attention due to their potential applications as molecular receptors and as components of nanomaterials. In this study, four extended tetraamide lig...

A pyridine-tricarboxylic acid, 5-(3′,5′-dicarboxylphenyl)nicotinic acid (H₃dpna), was employed as a adjustable block to assemble a series of coordination polymers under hydrothermal conditions. The seven new coordination polymers were for...

The new ferrocene-based metalloligand bis (N-4-[3,5-di-(2-pyridyl)-1,2,4-triazoyl])ferrocene carboxamide (L) was prepared through derivatization of 1,1′-ferrocenedicarboxylic acid with 4-amino-3,5-di(pyridyl)-4H-1,2,4-triazole. The composition...

The oxime group is important in organic and inorganic chemistry. In most cases, this group is part of an organic molecule possessing one or more donor sites capable of forming bonds to metal ions. One family of such compounds is the group of 2-pyridy...

The Z-isomer of N,N’-diammoniopropyl derivative of di(3-pyridyl)ethylene was synthesized. The structure and stability of complexes between this non-planar weak acceptor (A, (Z)-2) and a planar strong donor, the E-isomer of bis(18-crown-6)stilbe...

The complexes [Ln₂(hfac)₆(L)]·nC₆H₁₄ (Ln = Dy (1) n = 0, Yb (2) n = 1) with the L chiral 3,14-di-(2-pyridyl)-4,13-diaza[6]helicene ligand (hfac⁻ = 1,1,1,5,5,5-hexafluoroacetylacetonate) have been synthesized in their racemic form and str...

Organocatalysis by N-heterocyclic carbenes is normally initiated by the deprotonation of precursor azolium ions to form active nucleophilic species. Substituent effects on deprotonation have an impact on catalytic efficiency and provide insight into...

A novel series of mononuclear five-coordinated pseudohalido-Cu(II) complexes displaying distorted square bipyramidal: [Cu(L¹)(NCS)₂] (1), [Cu(L²)(NCS)₂] (2) and [Cu(L³)(NCS)]ClO₄ (5) as well as distorted trigonal bipyramidal: [Cu(isp₃tren)(N₃)]ClO₄ (...

This short note describes the synthesis of compound 6,6′-di-(2″-thiophenol)-2,2′-bipyridine from its methyl phenyl sulfane precursor via deprotection of the methyl groups. The product as well as the intermediate in the synthetic rou...

Two 3D Zn(II) and Cd(II) coordination polymers, [Zn₂(µ₄-dppa)(µ-dpe)(µ-H₂O)]_n·nH₂O (1) and [Cd₂(µ₈-dppa)(µ-dpe)(H₂O)]_n (2), have been constructed hydrothermally using 4-(3,5-dicarboxyphenoxy)phthalic acid (H₄...

The combined use of di-2-pyridyl ketone ((py)₂CO) with various diols in Mn cluster chemistry has afforded five new compounds, namely, [Mn₁₁O₂(OH)₂{(py)₂CO₂}₅(pd)(MeCO₂)₃(N₃)₃(NO₃)₂(DMF)₄](NO₃)∙2DMF∙H₂O (1∙2DMF∙H₂O), [Mn₁₁O₂(OH...

Recently, metal-coordinated orthogonal self-assembly has been used as a feasible and efficient method in the construction of polymeric materials, which can also provide supramolecular self-assembly complexes with different topologies. Herein, a crypt...

Transition metal (II) complexes stabilized by 2,6-di(pyrazol-3-yl)pyridine as a novel coplanar tridentate nitrogen-donor ligand have been reported for their unusual structures and photoluminescent properties. In this work, the ligand 2,6-bis(5-isopro...

A new series of mononuclear Ho³⁺ complexes derived from the β-diketonate anions: 4,4,4-trifluoro-1-phenyl-1,3-butanedioneate (btfa⁻) and 4,4,4-trifuoro-1-(naphthalen-2-yl)-1,3-butanedionate (ntfa⁻) have been synthesized, [Ho(btfa)₃(H...

Two ligands, 2,4-di-2-pyridyl-2,4-pentanediol (rD and mD), were employed to synthesize two Mn₂ complexes, [Mn₂(rD)₂Br₂] (1) and [Mn₂(mD)₂(H₂O)₂]Br₂ (2). Compound 1 crystallized in a tetragonal space group, P4₁2₁2, with a novel hamburger shaped struct...

A pyridine–tricarboxylic acid, 4-(6-carboxy-pyridin-3-yl)-isophthalic acid (H₃cpia), was used as a versatile building block to synthesize three novel coordination polymers under hydrothermal conditions and formulated as [Mn₈(μ₃-Hcpia)₂ (μ...

Two structural isomeric porphyrin-based triads (Zn(II)porphyrin−Sn(IV)porphyrin−Zn(II)porphyrin) denoted as T1 and T2 were prepared from the reaction of meso-[5-(4-hydroxyphenyl)-10,15,20-tris(3,5-di-tert-butylphenyl)porphyrinato]zinc(II)...

The three complexes [M(Me₂dpb)Cl] (M = Ni, Pd, Pt) containing the tridentate N,C,N-cyclometalating 3,5-dimethyl-1,5-dipyridyl-phenide ligand (Me₂dpb⁻) were synthesised using a base-assisted C‒H activation method. Oxidation potentials from cyclic volt...

2,6-pyridine dicarboxylic acid (DPA) is an exceptional biomarker of notorious anthrax spores. Therefore, the rapid, sensitive, and selective quantitative detection of DPA is extremely significant and urgent. This paper reports a Zn(II) metal–or...

The combined use of di-2-pyridyl ketone, (py)₂CO, and acetates (MeCO₂⁻) in nickel(II) chemistry in H₂O-MeCN under basic conditions (Et₃N) afforded the coordination cluster [Ni₁₁(OH)₆(O₂CMe)₁₂{(py)₂C(OH)(O)}₄(H₂O)₂] (1) in 80% yield, where (py)₂C(OH)(...

In this report, we explore the use of supercritical CO₂ (scCO₂) in the synthesis of well-known metal-organic frameworks (MOFs) including Zn-MOF-74 and UiO-66, as well as on the preparation of [Cu₂₄(OH-mBDC)₂₄]_n metal-organic polyhedra (MOPs) and two...

Two hydrazone Schiff base-bridging ligands with different heterocycles {2-[(E)-(5-chloro-2-hydroxyphenyl)methylidene]diazanyl}(pyrazine-2-yl)methanone (H₂L_Schiff-1) and (E)-N′-(2-hydroxy-3-methoxybenzylidene)nicotinohydrazide (H₂L_Schiff-2) toge...

AE90015 is a highly specific and effective negative allosteric modulator (NAM) for the human mGlu5 receptor, showing significant promise for treating Parkinson’s disease. An in vivo rat oral dose study was conducted on AE90015, which involved t...

To evaluate the antioxidant activity of potential synthetic enzyme mimetics, we prepared new five copper(II) complexes via a self-assembly method and named them [Cu(2-(HOCH₂)py)₃](ClO₄)₂ (1), [Cu(2-(HOCH₂)py)₂(H₂O)₂]SiF₆ (2), [Cu₂(2-(HOCH₂CH₂)py)₂(2-...

In recent years, the coupling of structurally and functionally controllable polymers with biologically active protein materials to obtain polymer–protein conjugates with excellent overall properties and good biocompatibility has been important...

Heme-type catalase is a class of oxidoreductase enzymes responsible for the biological defense against oxidative damage of cellular components caused by hydrogen peroxide, where metal-oxo species are proposed as reactive intermediates. To get more in...

In the field of sustainable energy conversion and storage technologies, copper-based complexes have become a research hotspot due to their efficient and stable catalytic performance. The development of bifunctional catalysts that can simplify catalyt...

A series of six coordination polymers based on octahedral cluster anions [Re₆Q₈(CN)₆]⁴⁻ (Q = S or Se) and Ag⁺ cations coordinated by bipyridine analogs were synthesized under solvothermal conditions. Their structures have been characterized by...

The synthesis, structural characterization and magnetic study of novel Co^II/4f and Co^II/Y^III clusters are described. In particular, the initial employment of di-2-pyridyl ketone, (py)₂CO, in mixed metal Co/4f chemistry, provided access to four triang...

Non-heme manganese(II) complexes [(IndH)Mn^IICl₂] (1) and [(N4Py*)Mn^II(CH₃CN)](ClO₄)₂ (2) with tridentate isoindoline and pentadentate polypyridyl ligands (IndH = 1,3-bis(2′-pyridylimino)isoindoline; N4Py* = N,N-bis(2-pyridylmethyl)-1,2- di(2-py...

In this work, density functional theory (DFT) calculations were employed to study the photocatalytic reduction of CO₂ into CO using a series of Pt(II) square planar complexes with the general formula [Pt(5-R-dpb)Cl] (dpb = 1,3-di(2-pyridyl)benzene an...

A series of five neutral mononuclear lanthanide complexes [Ln(HL)(L)] (Ln = Dy³⁺, Ho³⁺ Er³⁺ and Tb³⁺) with rigid pentadentate N₃O₂-type Schiff base ligands, H₂L^H (1-Dy, 3-Ho, 4-Er and 6-Tb complexes) or H₂L^OCH3, (2-Dy complex) has been synthesized by...

Thiosemicarbazones (TSCs) with their modular character (thiosemicarbazides + carbonyl compound) allow broad variation of up to four substituents on the main R¹R²C=N(1)–NH–C(S)–N(4)R³R⁴ core and are thus interesting tools for the for...

An interaction of water-methanol solution of sodium1,4-benzenediacetate (bda) and 4,4′-bipyridylethelene (bpee) with aqueous solution of Zn(NO₃)₂·6H₂O at room temperature yielded colourless crystals of 1 after three weeks in a sealed glass tube. The...

A series of dinuclear copper(I) N,C,N- and P,C,P-carbodiphosphorane (CDP) complexes using multidentate ligands CDP(Py)₂ (1) and (CDP(CH₂PPh₂)₂ (13) have been isolated and characterized. Detailed structural information was gained by single-crystal XRD...