Article
Chemistry, Inorganic & Nuclear
Vasileios Filippou, Martina Bubrin, Anita Grupp, Mark R. Ringenberg, Wolfgang Kaim
Summary: The structures and spectroelectrochemical properties of compounds obtained from the reactions of different ligands with copper(I) and copper(II) precursors were studied. The copper(I) compounds showed different coordination modes and redox properties, while the copper(II) compounds exhibited diverse coordination modes. The spectroelectrochemistry also provided insights into their oxidation and reduction properties.
INORGANICA CHIMICA ACTA
(2022)
Article
Chemistry, Physical
Oleksandra Veselska, Nathalie Guillou, Maria Diaz-Lopez, Pierre Bordet, Gilles Ledoux, Sebastien Lebegue, Adel Mesbah, Alexandra Fateeva, Aude Demessence
Summary: A series of d(10) coinage metal thiosalicylate coordination polymers (CPs) were reported, with 1D structures formed by M3S3 fused hexagons for Cu and Ag compounds and interpenetrated helical chains for Au CP. Depending on the metal, solid-state red and NIR emissive CPs were obtained with quantum yields up to 50%, providing a great opportunity to replace actual emissive critical raw materials.
Article
Chemistry, Inorganic & Nuclear
Wen-Xuan Xie, Chun-Hui Xue, Meng Liu, Kun Zhou, Hui-Hao Gu, Jiu-Yu Ji, Bao-Kuan Chen, Na Liu, Yan-Feng Bi
Summary: Two thiacalix[4]arene-protected silver(I) alkynyl nanoclusters, Ag-9 and Ag-18, were synthesized and characterized. The structural unit of these nanoclusters migrated in different modes under the influence of different coordination ions, resulting in different Ag.Ag distances. Both nanoclusters exhibited good solution stability and their fluorescence responses were influenced by the polarity of the solvent.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Ana Belen Lago, Arantxa Pino-Cuevas, Rosa Carballo, Ezequiel M. Vazquez-Lopez
Summary: Ten coordination compounds were isolated from reactions of divalent metal ions (Cu-II, Ni-II, and Zn-II) with the Schiff base ligand H2L derived from salicylaldehyde and omega-hydroxy carbonic acid hydrazide. The protonation levels of the ligand significantly influenced the coordination conformations of the metallosupramolecular compounds in the solid state. The structures of various complexes, including monomeric and dimeric compounds, were elucidated using single-crystal X-ray diffraction.
Article
Chemistry, Multidisciplinary
Atash V. V. Gurbanov, Abdallah G. G. Mahmoud, Vusala A. Aliyeva, M. Fatima C. Guedes Guedes da Silva, Armando J. L. Pombeiro
Summary: The reaction of 2-(2-(dicyanomethylene)hydrazineyl)benzoic acid (H2L1) with copper(II) acetate in the absence or presence of imidazole (im), 4,40-bipyridine (4,4'-bipy) or pyridine (py) leads to the formation of new complexes. The trinuclear Cu(II) complex [Cu(py)2{Cu(py)(m-L-2a)}2] (5) is obtained through a one-pot activation of nitrile groups. The catalytic activity of the complexes in the 1,3-dipolar azide-alkyne cycloaddition reaction was investigated.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Inorganic & Nuclear
Harish S. Kunchur, Maravanji S. Balakrishna
Summary: The reactions of amide functionalized bisphosphine with platinum salts were studied, resulting in the formation of various complexes. The mechanism of the formation of 1,2-azaphospholene was investigated. Additionally, a palladium complex with low catalyst loading showed excellent catalytic activity in the N-alkylation reaction of amines with alcohols.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Magdalena Barwiolek, Dominika Jankowska, Mateusz Chorobinski, Anna Kaczmarek-Kedziera, Iwona Lakomska, Slawomir Wojtulewski, Tadeusz M. Muziol
Summary: Two Zn(ii) complexes were successfully synthesized through template reactions and characterized by various methods. The complexes exhibited significant differences in structure and fluorescence properties, with different quantum yields in different solvents. Additionally, DFT calculations were performed to explain the structural and electronic spectral properties of the complexes.
Article
Chemistry, Multidisciplinary
Chang-Dai Si, Jian-Bin Zhang, Feng-Feng Pan, Peng Wang, Tian-Lu Liao, Wan-He Zheng, Jia-Cheng Liu, Kun Yuan
Summary: In this study, two coordination polymers (CPs) were synthesized under solvothermal conditions, and the transformation from aryl-bromine to aryl-chlorine was observed during the synthesis. One of the CPs showed antiferromagnetic properties, while the other exhibited strong fluorescence intensity.
Article
Crystallography
Zhiqiang Lu, Yanzhi Li, Yi Ru, Shujian Yang, Chu Hao, Mengke Zuo, Rongkai Jiao, Hui Yao
Summary: Two different metal-organic frameworks (MOFs) were synthesized by reacting different metal salts with mixed ligands, resulting in a 1D chain structure for one and a 3D framework with a three-fold interpenetration topology for the other. Luminescent properties of the MOFs were also studied.
Article
Chemistry, Multidisciplinary
Nasser Nasser, Richard J. Puddephatt
Summary: Through crystallographic characterization, a mixture of gold(III) complexes, including an amide complex [AuCl2{& κ;2-N,N'-2-C5H4NC(=O)N(t-Bu)] and an aldolate complex [AuCl2{& κ;2-N,O-2-C5H4NCH(OMe)O)], was obtained by recrystallization of the oxaziridine derivative 2-t-butyl-3-(2-pyridinyl)oxaziridine with Na[AuCl4].2H2O from a solvent mixture containing methanol. It is suggested that these products are formed after O-N or C-N bond cleavage of the strained oxaziridine ring upon coordination to the gold(III) center. NMR spectroscopic monitoring showed that O-N bond cleavage of the oxaziridine ring was favored in the presence of a protic solvent. Coordination of an oxaziridine to gold(III) can result in N-O or C-O bond cleavage, yielding an amide or an aldolate complex of gold(III), respectively.
Review
Chemistry, Inorganic & Nuclear
Maria G. F. Vaz, Marius Andruh
Summary: This paper reviews the most representative examples of polynuclear complexes containing three spin carriers, focusing on their magnetic properties and structural diversity. The synthetic approaches leading to such compounds and general strategies are discussed. Some 2p-3d-4f complexes have relevance in the field of molecular nanomagnets.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Chemistry, Organic
Jie Yang, Lizhi Gai, Xiaoyang Chen, Yanfei Liu, Shengmei Wu, Jiao Feng, Xinbing Sui, Hua Lu
Summary: This study synthesized dyes with stable seven-membered N,O-boron-chelated skeleton and thoroughly investigated their photophysical properties through spectroscopic tests and theoretical calculations. Single-crystal X-ray diffraction studies provided evidence of their structure. These dyes produced singlet oxygen species under laser irradiation, showing potential as photosensitizers for treating superficial tumors.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mehdi Elsayed Moussa, Pavel A. Shelyganov, Michael Seidl, Eugenia Peresypkina, Nele Berg, Ruth M. Gschwind, Gabor Balazs, Jana Schiller, Manfred Scheer
Summary: The reaction of the organometallic diarsene complex with Ag[Al{OC(CF3)(3)}(4)] yielded the Ag-I monomer, which exhibits dynamic behavior in solution and allows the synthesis of organometallic-organic hybrid assemblies upon reaction with N-donor organic molecules. This stepwise pathway was supported by DFT calculations. The reaction with different organic molecules led to the formation of different types of molecular compounds and polymers, showcasing the potential for directed selective synthesis of complex structures.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Nikolaos Moutzouris, Eleni E. Moushi, Thomais G. Tziotzi, Georgios D. Tarlas, Anastasios J. Tasiopoulos, Albert Escuer, Giannis S. Papaefstathiou
Summary: The employment of N,N'-bis(2-hydroxy-4-carboxyphenyl)oxalamide (H6L) in Cu2+ chemistry resulted in the formation of mononuclear complexes, leading to the synthesis of two families of isomorphous 3d/4f coordination polymers with distinct magnetic properties.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Xin-Jie Du, Lin-Lin Zhang, Li-Ting Li, Lei-Yu Zhan, Tian-Ran Li, Jiong-Peng Zhao, Fu-Chen Liu
Summary: Novel 3D metal formate frameworks with rare coordination polymers have been successfully assembled via microwave-assisted synthesis. These frameworks exhibit nonlinear optical activity and piezoelectric properties. Magnetic studies reveal antiferromagnetic coupling and spin canting in one of the complexes.
INORGANIC CHEMISTRY
(2022)
Article
Crystallography
Despina Dermitzaki, Angeliki Panagiotopoulou, Michael Pissas, Yiannis Sanakis, Vassilis Psycharis, Catherine P. Raptopoulou
Summary: In this study, a series of trinuclear complexes based on Schiff base ligands with nickel and lanthanide ions were synthesized, and their crystal structures and magnetic properties were investigated.
Article
Chemistry, Inorganic & Nuclear
Sofia Tzani, Michael Pissas, Vassilis Psycharis, Dimitrios A. Pantazis, Yiannis Sanakis, Catherine P. Raptopoulou
Summary: Two complexes were obtained by the reaction of methyl-2-pyridyl ketone with FeCl3.6H(2)O in various solvents. The molecular structures and physical properties of the two complexes are different.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Inorganic & Nuclear
Evangelos Pilichos, Annia Tubau, Saskia Speed, Merce Font-Bardia, Albert Escuer, Arnald Grabulosa, Julia Mayans
Summary: A new family of lanthanide compounds with different structures and properties have been synthesized using dppeO(2) as a ligand. The compounds exhibit a two-dimensional or one-dimensional structure depending on the lanthanide cation. Some of the compounds have magnetic or luminescent properties, and they can be used as structural probes or for specific applications.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Konstantinos N. Pantelis, Konstantina H. Baka, Junjie Huang, Catherine P. Raptopoulou, Vassilis Psycharis, Kim R. Dunbar, Theocharis C. Stamatatos
Summary: The initial use of Schiff base chelate N-naphthalidene-o-aminophenol in heterometallic cluster chemistry has provided access to two chemically similar but structurally dissimilar {Mn-III Dy-2(2)} compounds with rare linear and zigzag topologies, depending only upon the ancillary carboxylate groups.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Sergio Caballero, Evangelos Pilichos, Merce Font-Bardia, Julia Mayans, Albert Escuer
Summary: A series of tetranuclear Cu2IILn2III (LnIII from LaIII to YbIII), double-stranded metallohelicates have been synthesized using a bis-bidentate flexible ligand obtained by condensing o-vanillin with 4,4'-oxydianiline. The complexes exhibit various LnIII environments and decreasing coordination numbers along the series, with several nitrato coordination modes identified through structural determination. The isostructurality of the family members has been confirmed by powder X-ray diffraction, and susceptibility measurements reveal field-induced slow relaxation of magnetization in selected complexes.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Zoi G. Lada, Eugenia Katsoulakou, Christina D. Polyzou, Catherine P. Raptopoulou, Vassilis Psycharis
Summary: By using the HSAB principle and assisted self-assembly approach, tetranuclear [Co2Ln2(NO3)4(pao)4(piv)4] complex polynuclear compounds were obtained with 2-pyridylaldoximate (pao-) as the primary ligand and pivalate (piv-) as the ancillary co-ligand (Ln = Dy, Gd, Tb, Pr, Y). The structure of the Dy(III) complex was determined through single-crystal X-ray crystallography, revealing a metal topology of two {(CoDy2III)-Dy-III} triangles sharing a common Dy-III edge. Microanalytical, PXRD, and spectroscopic data provided evidence of the isostructural nature of all complexes. The nuclearity and metal topology of [Co2Ln2(NO3)4(pao)4(piv)4] complexes are new in the Co-III/Ln(III)/pao- chemistry, highlighting the utility of the assisted self-assembly approach.
CHEMISTRY-SWITZERLAND
(2023)
Article
Chemistry, Inorganic & Nuclear
Ioannis Mylonas-Margaritis, Zoi G. Lada, Alexandros A. Kitos, Diamantoula Maniaki, Katerina Skordi, Anastasios J. Tasiopoulos, Vlasoula Bekiari, Albert Escuer, Julia Mayans, Vassilios Nastopoulos, Evangelos G. Bakalbassis, Dionissios Papaioannou, Spyros P. Perlepes
Summary: The use of a new tetradentate Schiff base (LH2) in 4f-metal chemistry is described. The reaction between Ln(NO3)(3)center dot xH(2)O and LH2 in MeOH/CH2Cl2 leads to the formation of isostructural complexes [Ln(NO3)(3)(L ' H-2)(MeOH)] with good yields. The unexpected ring-opening of the cyclohexane ring in the Schiff base ligand L ' H-2 has been observed.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Organic
Aleksander Canko, Georgia D. D. Athanassopoulou, Vassilis Psycharis, Catherine P. P. Raptopoulou, Julie M. M. Herniman, Vasileios Mouchtouris, Angeliki Sofia Foscolos, Elias A. A. Couladouros, Veroniki P. P. Vidali
Summary: The intramolecular Diels-Alder reaction (IMDA) of a butenolide derivative, leading to the type II abyssomicin scaffold, and the total synthesis of (+/-)-abyssomicin 2 and (+/-)-neoabyssomicin B are reported for the first time. The formation of a type I intermediate and two paths to (+/-)-neoabyssomicin B are also discussed.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Anne Worrell, Gabriele Delle Monache, Mark M. Turnbull, Jeremy M. Rawson, Theocharis C. Stamatatos, Melanie Pilkington
Summary: A new asymmetrically substituted ONOO Schiff base ligand N-(2'-hydroxy-1'-naphthylidene)-3-amino-2-naphthoic acid (nancH(2)) reacts with Cu-2(O2CMe)(4)center dot 2H(2)O in the presence of Gd(O2CMe)(3)center dot 6H(2)O to afford a uniform one-dimensional homometallic chain, [Cu-II(nanc)](n) (1). The crystal structure of 1 shows that Cu(II) ions adopt a distorted square planar geometry and are coordinated in a tridentate manner by an [ONO] donor set from one nanc(2-) ligand and an O- of a bridging carboxylate group from a second ligand. The magnetic susceptibility of 1 follows Curie-Weiss law in the range 45-300 K, consistent with ferromagnetic interactions between S = 1/2 Cu(II) ions with g = 2.248.
CHEMISTRY-SWITZERLAND
(2023)
Article
Chemistry, Inorganic & Nuclear
Alexandros S. Armenis, Georgia P. Bakali, ChristiAnna L. Brantley, Catherine P. Raptopoulou, Vassilis Psycharis, Luis Cunha-Silva, George Christou, Theocharis C. Stamatatos
Summary: The systematic investigation of the reaction scheme Dy-III/X-/LH2 has resulted in the discovery of a new family of metal complexes. The ligand undergoes tautomerism and coordination with the metal center leads to the formation of various forms of the ligand, giving rise to Dy-III compounds with different nuclearities and magnetic properties. The complexes exhibit frequency-dependent, out-of-phase tails of signals, indicating the occurrence of quantum tunnelling of magnetization. The suppression of tunnelling through the application of an external dc field has been successful in one of the complexes.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Inorganic & Nuclear
Alexandros S. Armenis, Georgia P. Bakali, ChristiAnna L. Brantley, Catherine P. Raptopoulou, Vassilis Psycharis, Luis Cunha-Silva, George Christou, Theocharis C. Stamatatos
Summary: The systematic investigation of the general reaction scheme Dy-III/X-/LH2 has led to the discovery of a new family of metal complexes with different nuclearities and magnetic properties. These complexes exhibit frequency-dependent, out-of-phase signals characteristic of quantum tunnelling of magnetization, which can be suppressed by applying an external dc field.
DALTON TRANSACTIONS
(2022)
Article
Physics, Multidisciplinary
W. Papawassiliou, J. P. Carvalho, H. J. Kim, C. Y. Kim, S. J. Yoo, J. B. Lee, S. Alhassan, S. Orfanidis, V. Psycharis, M. Karagianni, M. Fardis, N. Panopoulos, G. Papavassiliou, A. J. Pell
Summary: By using DFT-assisted high-resolution nuclear magnetic resonance (NMR) spectroscopy, low energy excitations of Weyl fermions in WTe2 were detected and their evolution with temperature was observed. The emergence of Weyl fermions at around 120 K was found to be induced by the rapid increase of the Fermi level upon heating. The characteristic change of NMR parameters at this temperature indicates a topological Lifshitz transition.
PHYSICAL REVIEW RESEARCH
(2022)