Trinuclear Cd Research Articles

A new trinuclear Cd(II)-based coordination polymer with Salen ligand building blocks: Synthesis, crystallographic aspects, and optimistic photosensitive Schottky barrier diode behaviour

A new X-ray-characterized Cd(II)-based coordination polymer has been synthesized using Salen ligand (H2L1) and dicyanamide ion (dca) [N(CN)2]−, and characterized using elemental analysis, spectroscopy, SEM/EDX, TEM, and powder X-ray diffraction techniques. According to SCXRD, the complex crystallizes in the triclinic space group P-1. The asymmetric unit includes de-protonated ligands [L]2−, Cd(II) centres, and dca ions. The complex binuclear parts are connected by two μ1,5-dca bridges, resulting in the creation of a one-dimensional coordination polymer [(L1Cd)2(μ1,5-dca)2Cd]n. The polymer undergoes supramolecular aggregation via hydrogen bonding, CH···π(dca), and CH···π(arene) interactions. Hirshfeld surfaces (HS) and 2D fingerprint plots have been deployed to visualize the supramolecular interactions. The analysis shows that N…H interactions (18.2%) are more common in the crystal packing than Cd···O/O···H. This complex displays electrical conductivity and photosensitivity properties, making it a promising material for optoelectronic applications. Experimental and DFT studies have confirmed that it is a direct semiconductor with a specific optical band gap (3.54 eV) and is also used to construct a photosensitive Schottky barrier diode (SBD). The DFT calculated optical conductivity was used to analyse how the material's conductivity changes upon illumination. Due to the photon absorption, the material's electrical conductivity and photoconductivity change were concomitantly observed. Finally, the DOS analysis explains the complex's conductivity behaviour in a better logistic way.

Atmospheric Carbon Dioxide Capture as Carbonate into a Luminescent Trinuclear Cd(II) Complex with Tris(2-aminoethyl)amine Tripodal Ligand

Spontaneous atmospheric CO2 capture as carbonate anion occurred in the synthesis of a trinuclear Cd(II) complex with tris(2-aminoethyl)amine ligand. In reaction two types of compounds were obtained and structurally characterized by X-ray diffraction on a single crystal: initially [{Cd(tren)}3(tren)](ClO4)6·2H2O (1) and subsequently [{Cd(tren)}3(tren)][{Cd(tren)}3(µ3-ηCO3)](ClO4)10 (2). The carbonate anion replaces partially the bridging tren molecule and coordinates in a µ3 fashion. The luminescent properties of the compounds were investigated.

A 3D 8-connected bcu topological metal–organic framework built by trinuclear Cd(II) units: Photocatalysis and LC-MS studies

A new metal–organic framework (MOF), namely [Cd3(tp)3(bmi)2] (SUSE-1, SUSE = Sichuan University of Science & Engineering) (H2tp = 1,4-dicarboxybenzene acid and bmi = 1,3-bis(2-methylimidazolyl)pentane), has been synthesized. It exhibits a typical 8-connected bcu-type network with [Cd3(COO)6(bmi)4] nodes. SUSE-1 showed effective photocatalytic performance for the disintegration of the dyes Rhodamine B (Rh B), methyl orange (MO) and methylene blue (MB). In addition, a plausible mechanism for the degradation of MB was suggested from the results of the trapping method and LC-MS studies.

Treatment and Nursing Values of Cd(II) Complex with Photocatalytic Activity on Bacterial Infection by Inhibiting the Gram-Positive Bacteria Growth

Presented here is a trinuclear cluster-based Cd(II) compound, namely, {[(CH3)2NH2][Cd6K(bdc)6(btz)3(H2O)6]}n (1 H2bdc = terephthalic acid, Hbtz = 1H-benzotriazole), has been solvothermally prepared and structurally determined by the single crystal X-ray diffraction analysis, elemental analysis, powder X-ray diffraction analysis, and thermogravimetric analysis. Notably, compound 1 shows excellent photocatalytic activity for degradation of MV irradiated by UV light. In addition to this, the biological activity of the new compound on bacterial infection was evaluated, and the corresponding mechanism was also studied. The ELISA assay was used to evaluate the TNF-α and IL-1β released into plasma after compound treatment. Then, the relative expression levels of the bacterial survival gene were measured with real-time RT-PCR.

Molecular and Supramolecular Structures of Cd(II) Complexes with Hydralazine-Based Ligands; A New Example for Cyclization of Hydrazonophthalazine to Triazolophthalazine

Molecular and supramolecular structures of two polymeric and one trinuclear Cd(II) complex with hydralazine-type ligands were presented. Self-assembly of E-1-(2-(thiophen-2-ylmethylene)hydrazinyl)phthalazine (HL) and CdCl2 gave the 1D coordination polymer [Cd(H2L)Cl3]n*H2O, 1, in which the Cd(II) ion is hexa-coordinated with one cationic monodentate ligand (H2L+) and five chloride ions, two of them acting as connectors between Cd(II) centers, leading to the formation of a 1D coordination polymer along the a-direction. Using DFT calculations, the cationic ligand (H2L+) could be described as a protonated HL with an extra proton at the hydrazone moiety. Repeating the same reaction by heating under reflux conditions in the presence of 1 mL saturated aqueous KSCN solution, the ligand HL underwent cyclization to the corresponding [1,2,4]triazolo[3,4-a]phthalazine-3(2H)-thione (TPT) followed by the formation of [Cd(TPT)(SCN)2]n*H2O, 2, a 1D coordination polymer. In this complex, the Cd(II) is coordinated with one NS-donor TPT bidentate chelate and two bridged μ(1,3)-thiocyanate ions connecting the Cd(II) centers forming the 1D polymer array along the b-direction. Heating E-2-(1-(2-(phthalazin-1-yl)hydrazono)ethyl)phenol HLOH with CdCl2 under reflux condition gave the trinuclear complex [Cd3(Hydralazine)2(H2O)2Cl6], 3, indicating the hydrolysis of the hydrazonophthalazine ligand HLOH during the course of the reaction. Due to symmetry considerations, there are only two different Cd(II) centers having CdN2Cl3O and CdN2Cl4 coordination environments. Hirshfeld topology analysis was used to analyze the solid-state supramolecular structure of the studied complexes.

A new trinuclear cluster-based Cd(II) compound: photocatalytic property and nursing application values on the bacterial infection

ABSTRACT A new Cd(II) coordination polymer with the formula of {[(CH3)2NH2][Cd3(NH2-bdc)3(btz)(H2O)]} n (1 NH2-H2bdc = 2-aminoterephthalic acid, Hbtz = 1 H-benzotriazole) was produced and then it was structurally characterized through powder X-ray diffraction (PXRD), the analysis of X-ray single-crystal diffraction, along with elemental analysis (EA). The photocatalytic property investigations indicate that compound 1 exhibits good activity for photodegradation of methyl violet (MV) with 60.7% of MV removal in 40 min under room temperature. Furthermore, the assessment of the compound’s treatment activity and nursing application values on the bacterial infection was conducted and its corresponding mechanism was also studied. Evaluation of the in vitro hemolysis of the compound was determined by measuring the degree of red blood cell lysis and hemoglobin release. The effect of new compounds on the relative proliferation rate of L-929 cells was measured by MTT assay. The ELISA detection kit showed that the compound could reduce the TNF-α and IL-1β content released into plasma. Next, the inhibitory activity of the compound on the bacterial survival gene expression was also proved with real-time RT-PCR. The hemolysis rate of the new compound to blood is 3.4%, which is less than the standard 5%, which is non-hemolytic reaction. The compound also has no obvious cytotoxicity and has good cell compatibility.

Trinuclear Cd3O14 hexaborate and two nickel borates based on molten salt synthesis and precursor synthesis: structure, characterization, and properties.

In this work, different synthetic methods were used to prepare metal borates. One cadmium borate Cd3[B6O9(OH)2]2·2NO3·4H2O (1) and two nickel borate Ni0.8Mn0.2{B6O7(OH)3[O(CH2)2NH2]3} (2), [Ni(1-MI)6]·[B5O6(OH)4]2·2DMF (3, 1-MI = 1-methylimidazole, DMF = N,N-dimethylformamide) species were successfully prepared. The structures of these three compounds were confirmed via single crystal powder X-ray diffraction (SCPXRD), elemental analysis, FTIR, PXRD, and ICP studies. Compound 1 was prepared via molten salt synthesis, and compounds 2 and 3 were prepared via precursor synthesis, which is a synthetic method that uses a certain polyanionic cluster as a reagent. Compound 1 shows a novel three-dimensional (3D) structure, in which the [B6O11(OH)2] units acting as the basic polyanionic cluster form a two-dimensional (2D) anionic structure. In addition, the unexpected Cd3O14 clusters are connected with the 2D structures, leading to the 3D structure. The crystal structure of 2 is packed with very large neutral Ni0.8Mn0.2{B6O7(OH)3[O(CH2)2NH2]3} oxo-metal-boron clusters. The crystal structure of 3 consists of a [B5O6(OH)4]- cluster, a DMF molecule, and a [Ni(1-MI)6]2+ complex. In particular, 2 was successfully constructed using the same hexaborate cluster as its precursor. However, 3 only contains Ni2+ cations when a neutral NixMn1-x[B6O7(OH)6] cluster was used as an initial reagent, and it shows an ability to select a certain metal cation during the self-assembly process. Moreover, compounds 1, 2, and 3 exhibit different wide band gaps of 3.06 eV (1), 3.95 eV (2), and 4.24 eV (3).

Synthesis of Coordination Polymers from the Heterometallic Carboxylate Complexes with Chelating N-Donor Ligands

New trinuclear Cd–Ln molecular complexes [EuCd2(O2CC6F5)6(NO3)(Bipy)2] (I, Bipy is 2,2'-bipyridine) and [LnCd2(Bzo)6(NO3)(Phen)2] · 4MeCN (Ln = Tb (II), Eu (III), Bzo is anion of 3,5-di-tert-butylbenzoic acid, Phen is 1,10-phenanthroline) are studied. Their structures are determined by X-ray structure analysis (СIF files CCDC nos. 1938125 (I), 1938124 (II)) or by X-ray diffraction analysis (III), and the photoluminescence properties are studied. The reactions of complexes I and II with terephthalic acid (H2Bdc) are accompanied by the destruction of the heterometallic molecules to form 2D coordination polymers [Cd3(Bbdc)3(Bipy)2]3n · 4nMeCN · nH2O (IV) and [Cd2(Bdc)2(Phen)2]n · 2nDMF (V) (СIF files CCDC nos. 1938126 and 1937492, respectively).

Two polyoxometalate-based inorganic-organic hybrids and one coordination polymer assembled with a functionalized calix[4]arene: Catalytic and electrochemical properties

Self-assembly of 4-pyridyl-functionalized calix[4]arene ligand 5,11,17,23-tetrakis(1,1-dimethylethyl)-25,26,27,28-tetrakis[(4-pyridylmethyl)oxy]calix[4]arene (L), Ag(I)/Cd(II) cations and polyoxometalate obtained two inorganic-organic hybrids [Ag3(L)2][PMo12O40]·CH3CN·4H2O (1), [Ag3(L)2][PMo12O40]·2DMA·0.5EtOH (2) and one complex [Cd3(L)2Cl6]·4CH3CN·4H2O (3) (DMA = N,N-dimethylacetamide). Hybrids 1 and 2 have fascinating one-dimensional chains, which are linked by hydrogen bonds between the C atoms of L ligands and the O atoms of [PMo12O40]3− anions to generate supramolecular layers. 3 displays a thick layer containing trinuclear Cd(II) clusters. Noteworthy, hybrid 1 exhibits excellent heterogeneous catalytic activity for oxidative desulfurization reaction and obvious electrocatalytic activity for oxidize ascorbic acid and reduce NaBrO3. Complex 3 shows heterogeneous catalytic ability for Knoevenagel condensation reaction.

Highly Efficient Bifunctional Amide Functionalized Zn and Cd Metal Organic Frameworks for One-Pot Cascade Deacetalization-Knoevenagel Reactions.

A pyridine-based amide functionalized tetracarboxylic acid, 5,5′-(pyridine-2, 6-dicarbonyl)bis(azanediyl)}diisophthalic acid (H4L), was synthesized and its coordination chemistry toward zinc(II) and cadmium(II) ions was studied. The reactions of H4L with Zn(NO3)2.6H2O and Cd(NO3)2.4H2O led to its full or partial deprotonation, respectively, and the formation of the 2D coordination polymers [Zn2(L)(H2O)4]n.4n(H2O) (1) and [Cd3(HL)2(DMF)4]n.4n(DMF) (2) (DMF = N,N'-dimethylformamide), respectively. They were characterized by elemental analysis, FT-IR, photoluminescence, thermogravimetry, and single-crystal and powder X-ray diffraction. In 1, the L4− ligand is planar with every carboxylate anion binding a Zn(II) cation and giving rise to a 2D grid with the metals with tetrahedral environments. In 2, the combination of bridging HL3− and dimethylformamide to form trinuclear Cd(II) clusters engenders secondary building block units and generates a layer-type 2D network with the metals with octahedral and pentagonal bipyramid coordination geometries. The topological analyses of 1 and 2 reveal 2,4-connected and 3,6-connected binodal nets, respectively. On account of the presence of Lewis acid (Zn or Cd centers) as well as basic (uncoordinated pyridine and amide groups) sites, 1 and (to a much lower extent) 2 effectively catalyze the one-pot cascade deacetalization-Knoevenagel condensation reactions under quite mild conditions. They act as heterogeneous catalysts, being easy to recover and recycle without losing activity.

Synthesis, X‐ray characterization and density functional theory studies of N6‐benzyl‐N6‐methyladenine–M(II) complexes (M = Zn, Cd): The prominent role of π–π, C–H···π and anion–π interactions

We report the synthesis and X‐ray characterization of the N6‐benzyl‐N6‐methyladenine ligand (L) and three metal complexes, namely [Zn(HL)Cl3]·H2O (1), [Cd(HL)2Cl4] (2) and [H2L]2[Cd3(μ‐L)2(μ‐Cl)4Cl6]·3H2O (3). Complex1consists of the 7H‐adenine tautomer protonated at N3 and coordinated to a tetrahedral Zn(II) metal centre through N9. The octahedral Cd(II) in complex2is N9‐coordinated to two N6‐benzyl‐N6‐methyladeninium ligands (7H‐tautomer protonated at N3) that occupy apical positions and four chlorido ligands form the basal plane. Compound3corresponds to a trinuclear Cd(II) complex, where the central Cd atom is six‐coordinated to two bridging μ‐L and four bridging μ‐Cl ligands. The other two Cd atoms are six‐coordinated to three terminal chlorido ligands, to two bridging μ‐Cl ligands and to the bridging μ‐L through N3. Essentially, the coordination patterns, degree of protonation and tautomeric forms of the nucleobase dominate the solid‐state architectures of1–3. Additionally, the hydrogen‐bonding interactions produced by the endocyclic N atoms and NH groups stabilize high‐dimensional‐order supramolecular assemblies. Moreover, energetically strong anion–π and lone pair (lp)–π interactions are important in constructing the final solid‐state architectures in1–3. We have studied the non‐covalent interactions energetically using density functional theory calculations and rationalized the interactions using molecular electrostatic potential surfaces and Bader's theory of atoms in molecules. We have particularly analysed cooperative lp–π and anion–π interactions in1and π+–π+interactions in3.

Structure of a luminescent 3D coordination polymer constructed with a trinuclear core of cadmium-trimesate and isoquinoline

A new photoluminescent 3-D coordination polymer 1 containing a trinuclear Cd(II) cluster [Cd3(TMA)2] (TMA = trimesate) has been synthesized under solvothermal conditions, reacting Cd(II) ions with trimesic acid in the presence of isoquinoline and DMF. Compound 1 contains three crystallographically different Cd(II) ions interconnected by two trimesate ligands. The Cd(1) and Cd(2) ions are six-coordinated with a distorted-octahedral coordination sphere, {Cd(1)O6} and {Cd(2)NO5} respectively. The Cd(3) ion is seven-coordinated having a distorted-monocapped trigonal prismatic geometry {Cd(3)N2O5}. Crystallographic studies shows that 1 has two-dimensional sheets interlock each other, giving rise to a twofold interpenetrating network consisting of trinuclear cores [Cd3(TMA)2] as nodes bridged by trimesate anions. Compound 1 exhibits a strong blue emission in solid-state (λem = 430 nm) and suspensions in different organic solvents (λem = 405–440 nm) at room temperature with lifetimes in the nanosecond range. Structure-related photoluminescence is attributed to presence of the rigid trinuclear core involving coordinated isoquinoline molecules. The crystalline material of 1 possess thermal stability up to 200 °C.

Coordination chemistry of flexible benzene-1,3,5-tricarboxamide derived carboxylates; notable structural resilience and vaguely familiar packing motifs.

Flexible benzene-1,3,5-tricarboxamides (BTAs), organic species well-known for their tendencies to form functional soft-materials by virtue of their complementary hydrogen bonding, are explored as structurally reinforcing supramolecular building blocks in porous coordination polymers. We report the synthesis and characterisation of two related, carboxylate-terminated BTA derivatives, and the structure and functionality of their polymeric Cd(ii) complexes. The polycarboxylate ligand benzene-1,3,5-tricarboxamide tris(phenylacetic acid) H3L1 was prepared, and the analogous trimethyl benzene-1,3,5-tricarboxamide tris acetate Me3L2 was prepared and its single crystal structure elucidated. On reaction with cadmium nitrate in a DMF/H2O mixture, each BTA compound yielded coordination polymer species with columnar packing motifs comparable to the familiar BTA triple helix seen in purely organic systems. In the case of Me3L2, this transformation was achieved through a convenient in situ ester hydrolysis. Complex 1 is a 2-dimensional layered material containing tubular intralayer pores, in which amide-amide hydrogen bonding is a notable structural feature. In contrast, the structure of 2 contains no amide-amide hydrogen bonding, and instead a columnar arrangement of ligand species is linked by trinuclear Cd(ii) cluster nodes into a densely packed three-dimensional framework. The crystal structures revealed both materials exhibited significant solvent-accessible volume, and this was probed with thermal analysis and CO2 and N2 adsorption experiments; complex 2 showed negligible gas uptake, while compound 1 possesses an unusually high CO2 capacity for a two-dimensional material with intralayer porosity and surprising structural resilience to guest exchange, evacuation and exposure to air.

A series of transition metal-organic frameworks based on a bipyridinium carboxylate ligand: Syntheses, structures and photoluminescent properties

Based on a bipyridinium carboxylate ligand 1-(3,5-dicarboxy)-benzyl-1,2-di(pyridine-4-yl)ethylene chloride (H2L+Cl−), eight transition metal coordination polymers, namely, {[Zn(L)Cl]⋅4H2O}n (1), {[Zn(L)H2O]⋅NO3⋅2H2O}n (2), {[Zn(L) (H2O)]⋅(NO3)0.5⋅(Cl)0.5⋅2H2O}n (3), {[Cd(L)(H2O)(NO3)]⋅2H2O}n (4), {[Cd1.5(L) (Cl)2]⋅2H2O}n (5), {[Cu(L)(H2O)]⋅NO3⋅H2O}n (6), {[Cu(HL)2(H2O)2]·Cl2·6H2O}n (7) and {[Ni(L)(H2O)Cl]⋅4H2O}n (8) have been synthesized and characterized by single-crystal X-ray diffraction analyses. Complexes 1 and 8 display 2D wave-like layer structures with a 3-connected 63 topology. Complexes 2 and 6 demonstrate 3D 2-fold interpenetrating frameworks with uninodal, 3-connected (10,3)-d utp-topology. Another pair of 3D 2-fold interpenetrating frameworks 3 and 4 possess 3-connected, uninodal 103ThSi2 (ths)-topology. Complex 5 shows a 2D layer structure based on the extending of trinuclear Cd(II) subunits. Complex 7 presents 1D double-chain structure, in which the central Cu(II) ions are connected by the partially deprotonated ligand HL. Additionally, powder X-ray diffractions (PXRD) and thermogravimetric analyses of complexes 1–8, as well as the solid-state luminescent properties of d10 metal complexes 1–4 at room temperature have also been discussed.

Synthesis, structure, fluorescent property, and antibacterial activity of new Cd(II) metal complex based on multidentate Schiff base ligand N,N′-Bis(3-methoxysalicylidenimino)-1,3-diaminopropane

The sequential reaction of a multisite coordinating compartmental ligand N,N′-Bis(3-methoxysalicylidenimino)-1,3-diaminopropane (H2L1) with Cd(OAc)2 followed by the addition of NaCl in a 2:3:2 stoichiometric ratio affords homometallic trinuclear Cd(II) coordination compound [Cd3(L1)2(Cl)2] (1). The complex 1 has been thoroughly characterized by common elemental analysis (CHN), FT-IR and UV–Vis spectroscopy. Single crystal X-ray diffraction was also performed to determine the complete structure of complex 1. X-ray diffraction studies reveal that the molecular complex comprises a linear tri-nuclear ensemble of cadmium metal ions, which is further supported by the concerted coordination action of two dianionic [L1]2– ligands along with two monodentate Cl− ligands. The central Cd(II) ion is attached to the terminal Cd(II) ions through two phenoxide bridging groups of the fully deprotonated ligands [L1]2–. This arrangement leads to two neighbouring four membered Cd2O2 rings. The terminal Cd(II) ions are penta-coordinated (2 N, 2O, Cl) in a distorted square pyramidal geometry and central Cd(II) ion attained distorted trigonal prismatic geometry through six oxygen atoms coordination from ligands. Tri-nuclear Cd(II) complex 1 display intraligand (π—π∗) fluorescence in DMSO solution at room temperature. The fluorescence properties of complex 1 as well as the respective di-compartmental Schiff base ligand (H2L1) have been investigated in DMSO solvent at room temperature with a comparative approach. Result confirmed that complex 1 is highly fluorescence active mediated due to “chelation enhanced fluorescence” [CHEF] but Schiff base ligand (H2L1) is fluorescence silent. The antibacterial efficacy of complex 1 was further investigated against some important Gram-positive and Gram-negative bacteria.

Metal organic frameworks with uni-, di-, and tri-nuclear Cd(ii) SBU prepared from 1,3-bis(4-pyridyl)propane and different dicarboxylate ligands: syntheses, structures and luminescent properties

Systematic variation of co-dicarboxylate ligands leads to three new MOFs based on uni-, di-, and tri-nuclear Cd(ii) SBUs.

Temperature-controlled assembly of three Cd(II)-coordination polymers based on 2′-carboxybiphenyl-4-ylmethylphosphonic acid and 1,10-phenanthroline

Hydrothermal reactions of 2′-carboxybiphenyl-4-ylmethylphosphonic acid (H3L) with Cd(CH3COO)2·2H2O and 1,10-phenanthroline (phen) under different reaction temperatures afforded three new compounds, namely [Cd(phen)(HL)]·H2O (1), [Cd3(phen)4(L)2(H2O)]·9H2O (2) and [Cd4(phen)5(HL)(L)2]·2.5H2O (3). Compounds 1–3 have the same component but different structures. Compound 1 synthesized at 100 °C displays a one-dimensional chain structure containing mononuclear Cd. Compounds 2 and 3 formed at 160 °C exhibit one-dimensional chain structure containing trinuclear Cd unit and zero-dimensional structure containing hexanuclear Cd unit, respectively. The compounds have been characterized by elemental analyses, infrared spectra (IR), UV–vis spectra, single-crystal X-ray diffraction analyses and thermogravimetric analyses. The optical band gaps and photoluminescent properties of compounds 2 and 3 have been investigated. Three compounds have been synthesized with the same reactant ratio and solvent system by varying the reaction temperatures, where the effects of the reaction temperatures on the structures have been discussed. Moreover, the optical band gaps and photoluminescent properties have also been studied.

A 3D Cd(II)-organic coordination polymer demonstrating selective sensing of Zn2+ ion and nitrobenzene

Cd(II)-organic coordination polymer with the formula [Cd3(btdc)3(DMF)2(EtOH)2]·2EtOH·2H2O were solvothermally synthesized by treating Cd(II) nitrates with 2,2′-bithiophene-5,5′-dicarboxylic acid (H2btdc) and characterized by single crystal X-ray diffraction, elemental analysis, thermogravimetric analyses, IR spectroscopy and X-ray powder diffraction. Single-crystal X-ray diffraction studies indicate that the Cd(II) complex exhibits a 3D supramolecular framework, in which trinuclear Cd(II) clusters are connected by btdc ligands to form a 2D (4, 4) layer. Furthermore, the 2D (4, 4) layers stacked via AA mode. This complex displays strong fluorescent emission both in the solid state and in methanol suspension at room temperature, which can act as the fluorescent probe for selectively detecting Zn2+ ions and nitrobenzene through luminescence enhancing and quenching, respectively.

Structure and Luminescent Property of a New Cd(II) Coordination Polymer With (3,6)-Connected ant Topology

Solvothermal reactions of Cd(NO3)2, H3btc, and HBTA afforded a new Cd(II) compound, namely (NH3)2[Cd3(btc)2(BTA)(DMA)]n (1 H3btc = 1,3,5-benzenetricarboxylic acid, HBTA = 1,2,3- benzenetriazole, DMA = N, N′-dimethylacetamide). Single-crystal X-ray analysis reveals that 1 is a complicated three-dimensional (3D) framework based on benzotriazole-controlled trinuclear Cd(II) clusters, which can be simplified into a (3,6)-connected ant-type topological network. Moreover, the luminescent properties of this compound were also investigated at room temperature.

Exploration of unconventional π–hole and C–H⋯H–C types of supramolecular interactions in a trinuclear Cd(ii) and a heteronuclear Cd(ii)–Ni(ii) complex and experimental evidence for preferential site selection of the ligand by 3d and 4d metal ions

We report the synthesis of a trinuclear cadmium(ii) (1) and a di(phenoxido)-bridged dinuclear cadmium(ii)–nickel(ii) (2) complex derived from a bicompartmental (N2O4) Schiff base ligand.