Dinuclear Structure Research Articles

Understanding the near-infrared fluorescence and field-induced single-molecule-magnetic properties of dinuclear and one-dimensional-chain ytterbium complexes based on 2-hydroxy-3-methoxybenzoic acid

Two Yb(iii) complexes with a dinuclear and belt-like one-dimensional chain structure were reported. Their near-infrared luminescence and single-molecule magnetic properties were investigated in detail.

Attaining highly branched polyethylene elastomers by employing modified α-diiminonickel(II) catalysts: Probing the effects of enhancing fluorine atom on the ligand framework towards mechanical properties of polyethylene

A novel panel of 1-(2,6-dibenzhydryl-3,4-difluorophenylimino)-2-aryliminoacenaphthylenes was synthesized and reacted with (DME)NiBr2 to give rise to mono and di-nuclear complexes with the general formula of LNiBr2 and L2Ni2Br4, respectively. All the ligands were characterized by elemental analysis, FT-IR, 1H, 13C, 19F NMR spectroscopy, and their complexes were analyzed by elemental analysis and FT-IR spectroscopy. The true coordination nature of the ligands in Ni2 and Ni5 was confirmed through single-crystal XRD studies and thus reveal the distorted square-pyramidal and tetrahedral geometry around the Ni(II) center, respectively. In connection with this, complex Ni2 forms a di-nuclear structure whereas Ni5 formed a mono-nuclear structure in the solid-state. These complexes were tested as catalysts for the polymerization of ethylene in the presence of aluminum reagents like methylaluminoxane (MAO), modified methylaluminoxane (MMAO) or dimethylaluminum chloride (Me2AlCl). The obtained polyethylenes are highly branched and ultra-high molecular weight (Mw = 11.42 × 105 g mol−1, Tm = 82.6 °C) with narrow polydispersity. The mechanical properties of the polyethylenes are analyzed through dynamic mechanical analysis (DMA), monotonic stress-strain test and thus revealed that high tensile strength, good elastomeric recovery (up to 63%) and highest elongation ability (up to 2592.6%) without break are the key highlights of the present work.

Trapped Intermediate of a Meerwein-Pondorf-Verley Reduction of Hydroxy Benzaldehyde to a Dialkoxide by Titanium Alkoxides.

A series of titanium alkoxides ([Ti(OR)4] (OR = OCH(CH3)2 (OPri), OC(CH3)3 (OBut), and OCH2C(CH3)3 (ONep)) were modified with a set of substituted hydroxyl-benzaldehydes [HO-BzA-Lx: x = 1, 2-hydroxybenzaldehyde (L = H), 2-hydroxy-3-methoxybenzaldehyde (OMe-3), 5-bromo-2-hydroxybenzaldehyde (Br-5), 2-hydroxy-5-nitrobenzaldehyde (NO2-5); x = 2, 3,5-di-tert-butyl-2-hydroxybenzaldehyde (But-3,5), 2-hydroxy-3,5-diiodobenzaldehyde (I-3,5)] in pyridine (py). Instead of the expected simple substitution, each of the HO-BzA-Lx modifiers were reduced to their respective diol [(py)(OR)2Ti(κ2(O,μ-O')(OC6H4-x(CH2O)-2)(L)x] (OR = OPri, x = 1, L = H (1a), OMe-3 (2a), Br-5 (3a·py), NO2-5 (4a·4py); x = 2, But-3,5 (5a), I-3,5 (6a), ONep; x = 1, L = H (1b), OMe-3 (2b), Br-5 (3b·py), NO2-5 (4b); x = 2, But-3,5 (5b), I-3,5 (6b·py)), as identified by single crystal X-ray studies. The 1H NMR spectral data were complex at room temperature but simplified at high temperatures (70 °C). Diffusion ordered spectroscopy (DOSY) NMR experiments indicated that 2a maintained the dinuclear structure in a solution independent of the temperature, whereas 2b appears to be monomeric over the same temperature range. On the basis of additional NMR studies, the mechanism of the reduction of the HO-BzA-Lx to the dioxide ligand was thought to occur by a Meerwein-Pondorf-Verley (MPV) mechanism. The structures of 1a-6b appear to be the intermediate dioxide products of the MPV reduction, which became "trapped" by the Lewis basic solvate.

Synthesis, Crystal Structure, Thermal Stability, Magnetic Property, and Biological Activity of a New Copper(II) Complex Based on 1,2,4‐Benzenetricarboxylic Acid and 2,2′‐Bipyridine

Based on an asymmetric 1,2,4‐benzenetricarboxylic acid (H3btc) and 2,2′‐bipyridine (bpy), a new CuII complex, Cu2(H2btc)4(bpy)2·8H2O (1), was synthesized and structurally characterized by single‐crystal X‐ray diffraction, hirshfeld surface (HS) analysis, IR spectroscopy, powder X‐ray analysis, thermal gravimetry analysis (TGA), magnetic susceptibility, EPR measurement, and UV/Vis spectrometry. Complex 1 shows a dinuclear copper structure. The CuII of each dinuclear moiety are in a slightly distorted square‐pyramidal environments. Magnetic susceptibility of 1 shows a ferromagnetic coupling between both metal atoms. The interaction of 1 with bovine serum albumin (BSA) is investigated using UV/Vis, fluorescence spectroscopic methods. The CuII complex shows strong binding propensity in albumin binding study.

The syntheses, structures, magnetic and luminescent properties of five new lanthanide(III) complexes based on tetrazole 1-acetic ligand

Five new lanthanide complexes based on tetrazole-1-acetic ligand and 2,2′-bipyridine as auxiliary ligand have been solvothermally synthesized with the formulas [Ln2(1-tza)2(NO3)4(2,2′-bipy)2] [Ln = Nd (1), Sm (2), Eu (3), Tb (4), Dy (5), 1-tza = tetrazole 1-acetic and 2,2′-bipy = 2,2′-bipyridine] and structurally characterized by elemental analyses, IR spectra and single-crystal X-ray diffraction. The single-crystal X-ray diffraction data reveal that complexes 1–5 are dinuclear structures constructed by nitrate-O-bridged and μ1,3 carboxyl groups from 1-tza ligand, in which each nine-coordinated center Ln(III) ion is in a slightly distorted capped square antiprism geometry. The magnetic behaviors of 1–5 have been investigated. The solid-state photoluminescent measurements illustrate that complexes Eu 3 and Tb 4 display the strong fluorescent emissions in the visible region, whereas Nd 1 shows the characteristic near-infrared(NIR) luminescence. In addition, thermogravimetric analysis of Eu 3 is also described.

A new binuclear NiII complex with tetrafluorophthalate and 2,2′-bipyridine ligands: synthesis, crystal structure and magnetic properties

Abstract A new NiII compound, [Ni2(tfpa)2(bipy)2(H2O)4] (1) with tetrafluorophthalate (tfpa2−) and 2,2′-bipyridine (abbreviated as bipy) ligands, has been synthesized and structurally characterized. The single-crystal X-ray diffraction analysis reveals that the tfpa2− anions act as bis-monodentate linkers connecting NiII centers to form the dinuclear structure of 1. The dimeric units are stabilized by intramolecular π–π stacking and are further connected into a layer through O–HLO hydrogen bonding. Variable-temperature magnetic susceptibility data in the 10–200 K temperature range indicate weak ferromagnetic coupling between the two NiII ions.

Cooperative Silver Ion-Pair Recognition by Peralkylated Pillar[5]arenes

Ion-pair recognition of metal salts by pillararenes has never been reported. This limits the further development and applications of pillararene supramolecular chemistry. Herein we report the first examples of pillararene-based metal ion-pair recognition. They are host-guest complexes between three peralkylated pillar[5]arenes and the silver salt CF3COOAg. Single crystal X-ray analysis shows that CF3COOAg forms a unique dinuclear silver structure that penetrates into the pillar[5]arene cavity in these complexes. Besides the silver-π interactions, multiple C-H···O and C-H···F hydrogen bonds between the counterion and the pillar[5]arene host also contribute to stabilizing and maintaining the host-guest structures. Moreover, benefiting from the silver ion-pair recognition, perethylated pillar[5]arene EtP5 can be used as a solid absorbent to capture CF3COOAg from solution efficiently, showing a potential application in precious metal extraction and recycling.

Synthesis of Bis-β-Diketonate Lanthanide Complexes with an Azobenzene Bridge and Studies of Their Reversible Photo/Thermal Isomerization Properties.

The ligand, bis-β-diketone with an azobenzene bridge (4,4′-(4,4,4-trifluoro-1,3-butanedione)azobenzene, H2L), was prepared for the synthesis of a series of dinuclear lanthanide complexes with the formula [Ln2L3(DMSO)4] (Ln = Eu3+, Gd3+, Tb3+, and DMSO = dimethyl sulfoxide). X-ray crystallographic analysis reveals that the three complexes are triple-stranded dinuclear structures formed by three bis-β-diketonate ligands with two lanthanide ions (Ln3+). The trans-to-cis photoisomerization rates of the azobenzene group of the three [Ln2L3(DMSO)4] complexes in ethanol and acetonitrile solutions are similar to those of the pure H2L ligand and other azobenzene-containing mononuclear lanthanide complexes, but the trans-to-cis quantum yields (Φt→c = 10–3) are 1 order of magnitude smaller. The first-order rate constant for the cis-to-trans thermal isomerization at 50 °C of the H2L ligand is similar to those of azobenzene derivatives, while those for the [Ln2L3(DMSO)4] complexes (kiso = 10–4 s–1) are higher than those of the mononuclear azobenzene-containing lanthanide complexes. Furthermore, as the lanthanide ionic radius becomes smaller from Eu3+ to Gd3+ to Tb3+, the thermal isomerization rate constant decreases and the half-life increases. All these results are proposed to arise from the rigidity at both ends of the azo group by coordination to the dinuclear lanthanide ions and the different isomerization mechanisms. These are the first examples of bis-β-diketonate dinuclear lanthanide complexes with an azobenzene bridge and help illustrate the mechanism of azobenzene isomerization.

Amorphous to high crystalline PE made by mono and dinuclear Fe-based catalysts

We designed a series of dinuclear structures (F1–F5) bearing different linkers (rigid to flexible) between the Fe centers to investigate that how they could control the catalyst behaviour and polymer properties. The dinculear structures were used for polymerization of ethylene in presence of MMAO and TiBA. Based on initial results, catalyst F2 containing methyl-substituted phenyl bridge owned the highest activity (4.9 × 106 g PE/mol Fe.h) through dinuclearity and optimum bulkiness among the structures studied. This performance was along with the greatest crystallinity (χc) of PE made by the catalyst. Polymerization at higher temperature and monomer pressure exhibited high thermal stability and performance of catalyst F2, respectively. For further structures, decreasing of effective electronic and steric features led to lower activity. In addition, not only catalyst F4 bearing the short ethylene bridge exhibited the lowest productivity, but also produced the PE containing high level of short chain branches (37.2 SCB/1000C) affording a branched microstructure of polyethylene in presence of TiBA. It could attribute to low steric and electronic effects and short distance between the centers (ethylene linker) that made it suitable and active for SCB formation. Regarding to it, the electrophilicity index (ω) of F4 also was greater that led to high capacity or propensity of the specie to accept the (macro) monomer. For this sample, virtually no χc observed in DSC and SSA thermograms. Moreover, MMAO acted as an effective cocatalyst in comparison to TiBA, according to the kinetic profiles of ethylene polymerization. The observations were in respect of strength and affinity of the cocatalysts in deactivation and reactivation of the centers at prolonged time.

Syntheses, crystal structures, and solid-state spectroscopic properties of helical and non-helical dinuclear zinc(II) complexes derived from N2O2 ligands with different torsion-generating sources

The reaction of bis(N-salicylidene)-4,4′-diaminodiphenyl)ether (4OsalH2) with zinc(II) ion affords a 2:2 dinuclear zinc(II) complex formulated as [Zn2(4Osal)2]. A similar 2:2 dinuclear zinc(II) complex, [Zn2(4Ssal)2], can be obtained by the reaction of bis(N-salicylidene)-4,4′-diaminodiphenyl)thioether (4SsalH2) with zinc(II) ion. These two complexes, [Zn2(4Osal)2] and [Zn2(4Ssal)2], take similar helical structures. Although bis(N-salicylidene)-3,3′-diaminodiphenyl)methane (3MsalH2) and bis(N-salicylidene)-2,2′-diaminodiphenyl)thioether (2SsalH2) give dinuclear complexes with similar compositions, [Zn2(3Msal)2] and [Zn2(2Ssal)2], respectively, their structures are quite different from those of [Zn2(4Osal)2] and [Zn2(4Ssal)2]. Namely, [Zn2(3CH2sal)2] and [Zn2(2Ssal)2] take the mosocate and the phenoxo-bridged dinuclear structures, respectively. Such structural differences between the formed complexes occur depending on the relative positions of the two amino groups of the precursor dianiline, and reflect their diffuse reflectance and photoluminescence spectral behaviours. It has become clear that the electronic transitions of such a complex strongly depend on the relative arrangement of the two amino groups in the precursor dianiline compound as well as the kind of the central atom linking two aniline frameworks.

Polynuclear Ag(I)-N-heterocyclic carbene complexes: synthesis, electrochemical and in vitro anticancer study against human breast cancer and colon cancer

Four new bis-imidazolium salts 3–6 and their di- and polynuclear silver(I)–N-heterocyclic carbene (Ag(I)–NHC) complexes 7–10 were synthesized and characterized by using various analytical techniques. Single-crystal studies of 8 revealed a dinuclear structure whereas that of 9 revealed an interesting polynuclear structure. The quasi-reversibility of redox events in electrochemical study of 9 indicated that reduction produces unstable decomposed species and oxidation may be ascribed to these decomposed species. All the compounds were studied for their in vitro anticancer study against human breast cancer (MDA-MB-231) and colon cancer (HCT-116) cells. The study revealed that Ag(I)–NHC complexes are comparatively more potent than NHC precursors (salts). MDA-MB-231 cells appeared more sensitive to complexes than HCT-116 cells while reverse is the case for NHC salts.

Investigation on the coordination behaviors of tris(2-pyridyl)pyrazolyl borates iron(II) complexes

A series of Fe(II) complexes bearing hydrotris[3-(2-pyridyl)-pyrazolyl]borate (Tppy) ligand are prepared and examined. Crystallographic results of those TppyFe(II) complexes exhibit several new types of binding modes resulting in a mononuclear or dinuclear species formation. Mononuclear complex [TppyFeCl](1) has a distorted square pyramidal Fe(II) center with one arm (pyrazolyl-pyridyl) dangling outside of coordination sphere; this is newly finding in TppyFe(II) chemistry. Complex [(Tppy)2Fe(OH2)](2) has shown unique coordination behaviour and hydrogen bonding interactions with dangling pyrazolyl-pyridyl arms of Tppy ligands which might shorten the Fe-OH2 bond length and stabilize the coordination modes. In contrast, complex [TppyFe(μ-OMe)]2(3) shows an unique methoxy bridging centrosymmetric dinuclear structure which is isolated from the reaction of KTppy with FeSO4·7H2O after re-crystallization process in methanol. The complex 3 also could isolate independently from the reaction of complex 1 with sodium methoxide. To further investigate the coordination modes on mononuclear complex 1, exogenous anionic substituents used to form [TppyFe(BF4)](4) and [TppyFe(N3)](5) which was confirmed by crystallography. The podand Tppy ligand and nature of exogenous ligand elucidate the systematic modification and coordination modes in ferrous complexes.

Metal⋅⋅⋅F-C Bonding in Low-Coordinate Alkaline Earth Fluoroarylamides.

A set of calcium and barium complexes containing the fluoroarylamide N(C6 F5 )2 - is presented. These compounds illustrate the key role of stabilising M⋅⋅⋅F-C secondary interactions in the construction of low-coordinate alkaline earth complexes. The nature of Ca⋅⋅⋅F-C bonding in calcium complexes is examined in the light of structural data, bond valence sum (BVS) analysis and DFT computations. The molecular structures of [Ca{N(C6 F5 )2 }2 (Et2 O)2 ] (4'), [Ca{μ-N(SiMe3 )2 }{N(C6 F5 )2 }]2 (52 ), [Ba{μ-N(C6 F5 )2 }{N(C6 F5 )2 }⋅toluene]2 (62 ), [{BDIDiPP }CaN(C6 F5 )2 ]2 (72 ), [{N^NDiPP }CaN(C6 F5 )2 ]2 (82 ), and [Ca{μ-OB(CH(SiMe3 )2 )2 }{N(C6 F5 )2 }]2 (92 ), where {BDIDiPP }- and {N^NDiPP }- are the bidentate ligands CH[C(CH3 )NDipp]2 - and DippNC6 H4 CNDipp- (Dipp=2,6-iPr2 -C6 H3 ), are detailed. Complex 62 displays strong Ba⋅⋅⋅F-C contacts at around 2.85 Å. The calcium complexes feature also very short intramolecular Ca-F interatomic distances at around 2.50 Å. In addition, the three-coordinate complexes 72 and 82 form dinuclear structures due to intermolecular Ca⋅⋅⋅F-C contacts. BVS analysis shows that Ca⋅⋅⋅F-C interactions contribute to 15-20 % of the bonding pattern around calcium. Computations demonstrate that Ca⋅⋅⋅F-C bonding is mostly electrostatic, but also contains a non-negligible covalent contribution. They also suggest that Ca⋅⋅⋅F-C are the strongest amongst the range of weak Ca⋅⋅⋅X (X=F, H, Cπ ) secondary interactions, due to the high positive charge of Ca2+ which favours electrostatic interactions.

Solvothermal syntheses, crystal structures and luminescence properties of Zn(II) coordination compounds based on imidazophenanthroline carboxylate derivative ligand

Four new zinc(II) coordination compounds, [Zn2(Hcpip)4]·8H2O (1), [Zn4(Hcpip)4(1,3-bdc)2]n·5nH2O (2), [Zn(Hcpip)(1,4-bdc)0.5]n (3), [Zn2(Hcpip)2(H1,3,5-btc)]n·2nH2O (4), (H2cpip = 2-(2-carboxyphenyl)imidazo[4,5-f]1,10-phenanthroline, H2(1,3-bdc) = benzene-1,3-dicarboxylic acid, H2(1,4-bdc) = benzene-1,4-dicarboxylic acid, H3(1,3,5-btc) = benzene-1,3,5-tricarboxylic acid) have been synthesized under solvothermal conditions and characterized by elemental analysis, IR and single crystal X-ray diffraction. Compound 1 is a dinuclear molecular structure, and further linked by π … π interactions to form a 2D supramolecular layer. Compounds 2–4 display different 2D layer structures with 1D chains and aromatic carboxylate ligands. In addition, their luminescence properties and thermal stabilities have been investigated.

The Optical Band-Gap Evolution in Perovskite-Like Hybrid Iodobismuthates Effected by Nuclearity and Dimension: An Experimental and DFT Calculation Study

Three new perovskite-like hybrid iodobismuthates with two quaternary ammonium cations, namely (BnNEt3)3(Bi2I9) (1) (BnNEt3)4(Bi4I16) (2) and (n-Bu4N)2n(Bi4I14)n (3) (Bn = benzyl, n-Bu = n-butyl), have been synthesized by reacting BiI3 with the quaternary ammonium iodide in molar ratio 2:3 (1), 1:1(2), and 2:1 (3), respectively. All hybrids were characterized by elemental analysis, X-ray diffraction and UV–Vis spectroscopic analysis. Single-crystal X-ray diffraction revealed that hybrids 1 and 2 are di-nuclear and tetra-nuclear cluster structures respectively, while 3 is a polymeric chain structure based on a (Bi4I14) tetra-nuclear cluster unit. Their optical band-gaps have been determined as 2.19 eV(1), 2.16 eV(2), 2.02 eV(3), respectively. The optical band gaps exhibit a structure-related decrease from 1 to 3, in agreement with their color changes and the density functional theory (DFT) calculation results. The DFT calculations also reveal that there is a inversely proportional relationship between the optical Eg and the aggregation degree of the BiI6 octahedra in the hybrid iodobismuthate clusters.

Effect of ring substitution on synthesis of benzimidazolium salts and their silver(I) complexes: characterization, electrochemical studies and evaluation of anticancer potential

A series of bidendate 5,6-dimethyl benzimidazolium-based N-heterocyclic carbene (NHC) proligands and their silver complexes were synthesized. The synthetic approaches to the proligands were constrained by the methyl substituents, which impose a significant impact on the reactivity according to their sigma electron-donating abilities. The corresponding silver(I) complexes were obtained by in situ deprotonation of the NHCs and characterized by physicochemical and spectroscopic methods. In addition, a single-crystal X-ray diffraction study of complex C5 revealed its dinuclear structure. Irreversibility of redox events was observed in electrochemical studies of these complexes. In vitro anticancer studies of the azolium salts and their silver(I) complexes against human breast cancer (MDA-MB-231), colon cancer (HCT-116) and normal endothelial (EA.hy926) cells revealed that all the compounds are more cytotoxic to cancer cells than to normal cells and the complexes are more potent than their corresponding NHC proligands. Increased chain length, the presence of methyl substituents on the benzimidazole ring and aryl linker and two silver centres all enhance the biopotency of these complexes. Substituted benzimidazolium-based N-heterocyclic carbene (NHC) proligands and silver complexes are advantageous anticancer tools for medicinal chemistry.

Syntheses, characterization, DNA/HSA binding ability and antitumor activities of a family of isostructural binuclear lanthanide complexes containing hydrazine Schiff base

Three dinuclear lanthanide complexes, [Ln2(L)2(μ3-OAc)4(H2O)2]⋅2H2O (Ln = La (1), Eu (2) and Dy (3), HL = N’-(2-hydroxybenzylidene) nicotinohydrazide), have been synthesized and characterized by IR, elemental analysis and X-ray single-crystal diffraction. Crystallographic study revealed that the representative complex 1 displays a discrete dinuclear structure with a distorted tricapped trigonal prismatic geometry around La(III) ion. The interaction of complexes 1–3 with CT-DNA was investigated by absorption spectra, fluorescence quenching and viscosity, which reveals that the complexes bind to CT-DNA with a moderate intercalative mode. The complexes exhibited obvious DNA cleavage activities in the presence of H2O2. All complexes could bind to human serum albumin (HSA) with medium affinity through static mode; thus, HSA could effectively transport complexes. Furthermore, three complexes exhibited specific cytotoxicity to A549 cancer cells in micromole magnitude than other cancer cells tested and less toxicity than cisplatin for normal human cells HUVEC, in which massive cell apoptosis was induced by complexes through producing DNA damage and suppressing DNA synthesis.Communicated by Ramaswamy H. Sarma

Magnetic and Electrochemical Properties of Lantern-Type Dinuclear Ru(II,III) Complexes with Axial Chloride Ions or Water Molecules

By using [Ru2(O2CC3H7)4Cl]n (1) as a starting material, nBu4N[Ru2(O2CC3H7)4Cl2] (nBu4N+ = tetra(n-butyl)ammonium cation) (2) and [Ru2(O2CC3H7)4(H2O)2]BF4 (3) were prepared. The lantern-type dinuclear structures with axial chloride ions or water molecules were confirmed for 2 and 3 by X-ray crystal structure analyses. The crystal structures of 2 and 3 were compared with that of 1. In the crystal of 2, there were three crystallographically different dinuclear units; the Ru–Ru distances of each unit were 2.3094(3), 2.3046(4), and 2.3034(4) Å, respectively, which were longer than those of 1 (2.281(4) Å) and 3 (2.2584 (7) Å). Temperature dependent magnetic susceptibility measurements were performed for 1 and 2 as well as 3. The effective magnetic moments (µeff) at 300 K were 3.97 (for 1), 4.00 (for 2), and 3.97 µB (for 3), respectively. The decreases in the µeff value were confirmed for all of the complexes due to the large zero-field splitting (D): D = 68 cm−1 for 1, 78 cm−1 for 2, and 60 cm−1 for 3. Cyclic voltammograms measured in CH2Cl2 with a electrolyte of nBu4N(BF4) showed the Ru25+/Ru24+ process at −0.2–−0.4 V (vs. SCE) and the Ru26+/Ru25+ one at 1.3–1.4 V (vs. SCE), of which potentials were confirmed by the DFT calculation for nBu4N[Ru2(O2CC3H7)4Cl2].

Syntheses, Structures, Photoluminescence, and Magnetism of a Series of Discrete Lanthanide Complexes based on 2,5‐Dichlorobenzoate and 1,10‐Phenanthroline

The syntheses and crystal structures of eight lanthanide complexes with formula [Ln(2,5‐DCB)x(phen)y] are reported, which are characterized via single‐crystal, powder X‐ray diffraction, elemental analysis, IR spectroscopy, thermogravimetric analysis, photoluminescence measurement, and DC/AC magnetic measurement. These eight complexes are isostructural, and possess a discrete dinuclear structure. The adjacent dinuclear molecules are linked by the hydrogen bonding interactions into a one‐dimensional (1D) supramolecular chain. The neighboring 1D chains are further extended into a two‐dimensional (2D) supramolecular layer by the π–π stacking interactions. The photoluminescent properties of complexes 1 (NdIII), 2 (SmIII), 3 (EuIII), 5 (TbIII), 6 (DyIII), and 8 (YbIII) were investigated. Magnetic investigations also reveal the presence of ferromagnetic interactions in complexes 4 (GdIII), 6 (DyIII), and 7 (ErIII). Additionally, complex 6 (DyIII) demonstrates field‐induced slow magnetic relaxation behavior.

Investigation of the Electronic Structure of Aryl-Bridged Dinuclear U(III) and U(IV) Compounds

A family of dinuclear bis(Tp*) (Tp* = hydrotris(3,5-dimethylpyrazolyl)borate) uranium compounds with conjugated organic linkers was synthesized to explore possible electronic communication between ...