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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/28210738/highly-efficient-cold-white-light-emission-in-a-au2cucl2-p%C3%A2-n-2-pf6-type-salt
#1
Elnaz Hobbollahi, Manuela List, Benjamin Hupp, Fabian Mohr, Raphael J F Berger, Andreas Steffen, Uwe Monkowius
In the trinuclear, heterometallic cluster compound [Au2CuCl2(P∩N)2]PF6 metallophilic interactions give rise to very efficient cold-white light emission as a result of at least two thermally non-equilibrated emissive triplet states (one of mainly Cu → py and the other of Au → py character, respectively) with exceptional spin-orbit coupling and short emission lifetimes, which are competitive to Pt(II)- and Ir(III)-based emitters.
February 17, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28207024/-ru-co-x-core-complexes-with-benzimidazole-ligands-synthesis-x-ray-structure-and-evaluation-of-anticancer-activity-in-vivo
#2
Gabriella Tamasi, Antonello Merlino, Federica Scaletti, Petra Heffeter, Anton A Legin, Michael A Jakupec, Walter Berger, Luigi Messori, Bernhard K Keppler, Renzo Cini
The reaction of [Ru(CO)6Cl2], 1, with N[combining low line](3)-methylbenzimidazole (MBI) and 5,6-dimethylbenzimidazole (DMBI) afforded two new complexes with the general formula fac-[Ru(II)(CO)3Cl2L], L = MBI (2) or DMBI (4). Crystals of cis,trans-[Ru(II)(CO)2Cl2(N[combining low line](3)-MBI)2], 3, were also obtained from the mother liquor that produced 2. In the presence of water, the dissociation of Ru-N, Ru-Cl and Ru-CO bonds occurred as a function of time, water content and pH. Density functional theory structure simulations/optimizations were carried out at the Becke3LYP level of theory for evaluating the relative stability of possible conformers...
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28207023/chelated-bis-nhc-complexes-of-saturated-imidazolin-2-ylidene-nhc-ligands-structural-authentication-and-facile-ligand-fragmentation
#3
Michael G Gardiner, David S McGuinness, Catriona R Vanston
The CH2-linked bis(NHC) complexes [{((S)MesIm)2CH2}PdBr2] and [{((S)MesIm)2CH2}Pd(NCMe)2][PF6]2 are reported. These represent the first structurally characterized chelated, saturated bis(NHC) complexes. The complexes are subject to facile ligand fragmentation during their synthesis. Longer (CH2)n-linkers in the imidazolin-2-ylidene-based series of ligands afforded the pendant imidazolinium mono(NHC) complexes [{((S)MesImH)((S)MesIm)(CH2)n}PdBr3] by reaction of the diimidazolinium salts (n = 2, 3) with palladium acetate...
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28207022/benzoquinone-bridged-co2-complexes-with-different-magnetic-anisotropy-induced-by-solvent-molecules
#4
Wenhai Cao, Xiaoquan Zhu, Pengfei Liu, Shaodong Su, Shengmin Hu, Yuehong Wen, Xintao Wu, Tianlu Sheng
The first example of discrete small molecular compounds with different magnetic anisotropy induced by solvent molecules, benzoquinone-bridged Co2 complexes, [(TPyA)2Co2(L)]·solvent (L = 2,5-dibromo-3,6-dihydroxy-1,4-benzoquinone, solvent = CH3CN and H2O), has been prepared and fully characterized.
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28207021/lmct-facilitated-room-temperature-phosphorescence-and-energy-transfer-in-substituted-thiophenolates-of-gd-and-yb
#5
Vasily A Ilichev, Anton V Rozhkov, Roman V Rumyantcev, Georgy K Fukin, Ivan D Grishin, Artem V Dmitriev, Dmitry A Lypenko, Eugeny I Maltsev, Artem N Yablonskiy, Boris A Andreev, Mikhail N Bochkarev
To obtain luminescent lanthanide complexes with a low energy LMCT state the 2-(2'-mercaptophenyl)benzothiazolates, Ln(SSN)3, and 2-(2'-mercaptophenyl)benzoxazolates, Ln2(OSN)6 (Ln = Gd, Yb), were synthesized by the reaction of amides Ln[N(SiMe3)2]3 with respective thiophenols. Ytterbium complexes were structurally characterized by X-ray diffraction analysis. Cyclic voltammetry revealed that the deprotonated mercaptophenyl ligands have significantly lower oxidation potentials than their phenoxy analogues and some β-diketones...
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28203680/b-h-functionalization-of-the-monocarba-closo-dodecaborate-anion-by-rhodium-and-iridium-catalysis
#6
Yunjun Shen, Yani Pan, Kang Zhang, Xuewei Liang, Jiyong Liu, Bernhard Spingler, Simon Duttwyler
The regioselective derivatization of the monocarba-closo-dodecaborate anion via catalytic B-H bond activation is reported. Amide directing groups in combination with rhodium and iridium catalysts allowed for the direct functionalization of cage boron vertices. Products comprising B-C, B-N and B-Cl bonds were synthesized. As a key intermediate of the B-H activation step, an iridium complex with a direct B-Ir interaction was isolated and fully characterized by spectroscopic methods as well as X-ray crystallography...
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28203677/new-lithium-borates-with-bistetrazolato-2-and-pyrazinediolato-2-ligands-potentially-interesting-lithium-electrolyte-additives
#7
Lars H Finger, Alexander Venker, Fabian G Schröder, Jörg Sundermeyer
We present a convenient synthesis of the first silylated bistetrazole via a catalyzed twin [2 + 3] cycloaddition of TMS-azide at cyanogen and its application to access bistetrazolatoborates, structurally characterized by a unique unsaturated ten-membered B2N4C4 heterocyclic system. Furthermore, new borate anions with two pyrazine-2,3-diolato ligands were synthesized from tetrafluoroborate salts and structurally characterized. Their organic cation can be exchanged for Li(+)via cation exchange. The conceptual relation of these new salts to lithium ion battery bisoxalalatoborate additive LiBOB, a prominent solid electrolyte interface (SEI) generator, is discussed...
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28203666/self-assembly-of-metal-ion-responsive-supramolecular-coordination-complexes-and-their-photophysical-properties
#8
Zuoli He, Meng Li, Wenxiu Que, Peter J Stang
Herein, we describe the synthesis and characterization of two newly self-assembled supramolecular coordination complexes (SCCs) by using the cis-{Pt(PEt3)2}(2+) center and two different kinds of pyridyl-derivatized ligands. The photophysical properties of the resulting SCCs in the presence of metal ions revealed that these dipyridyl-containing SCCs hold potential as metal-ion-responsive materials.
February 16, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28198909/luminescent-ybvo4-by-atomic-layer-deposition
#9
Michael Getz, Per-Anders Hansen, Mohammed A K Ahmed, Helmer Fjellvåg, Ola Nilsen
UV to visible and near-infrared converting thin films of YbVO4 have been deposited by atomic layer deposition, using the precursor combinations Yb(thd)3 (thd = 2,2,6,6-tetramethyl-3,5-heptanedione) and O3, and VO(thd)2 and O3 at a deposition temperature of 240 °C, followed by post deposition annealing at 400-1000 °C. The UV absorption and the visible and near-infrared emission have been investigated in detail. The structure, thickness and composition of the deposited films have been studied by X-ray diffraction, ellipsometry, and X-ray fluorescence, respectively...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28198492/redox-state-manipulation-of-a-tris-p-tetrazolylphenyl-amine-ligand-and-its-mn-2-coordination-frameworks
#10
Carol Hua, Jing-Yuan Ge, Floriana Tuna, David Collison, Jing-Lin Zuo, Deanna M D'Alessandro
In situ spectroelectrochemical experiments coupled with UV/Vis/NIR, EPR, magnetism and fluorescence techniques have enabled insights into the electronic properties of the tris(p-tetrazolylphenyl)amine (H3TTPA) ligand and the new Mn(2+) frameworks [Mn3(TTPA)2(MeOH)6]n (1) and [Mn3(TTPA)2(DMF)6]n (2). Oxidation of H3TTPA generated the triarylamine radical which was found to be delocalised throughout the ligand backbone. Solid state Vis/NIR and EPR spectroelectrochemical experiments on the frameworks were used to probe the optical properties of the accessible redox states and their relative stabilities, as well as the charge transfer interactions which were generated upon infiltration of electron acceptor guests...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28198491/thermal-expansion-in-baruo3-perovskites-an-unusual-case-of-bond-strengthening-at-high-temperatures
#11
Paula Kayser, Sean Injac, Brendan J Kennedy, Andre L Menezes de Oliveira, Yuichi Shirako, Masashi Hasegawa
The temperature dependences of the structures of three polytypes of BaRuO3 have been investigated between room temperature and 1000 °C using high resolution synchrotron X-ray diffraction. The structural studies reveal a systematic decrease of the Ru-Ru distance as the pressure required to prepare the polytype increases. The O-O distance across the shared face increases as the Ru-Ru separation decreases. The 9R and 4H polytypes undergo unexceptional changes with increasing temperature. In 6H-BaRuO3 there is an apparent increase in the Ru-Ru interaction at around 650 °C and a concurrent reduction in the O-O distance, indicating an anomalous strengthening of the Ru-Ru interactions upon heating...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28198485/structural-transformations-of-layered-structures-constructed-from-cu-ii-chloranilate-monomer-compounds
#12
Sadahiro Yagishita, Akiko Himegi, Ken Kanazashi, Tomomi Ohishi, Ryuta Ishikawa, Tomohiko Hamaguchi, Satoshi Kawata
Hydrogen-bond supported intercalation compounds constructed from three types of two-dimensional layers and common guests, {(Hha)2[Cu(CA)2(EtOH)2]}n (1), {(Hha)2[Cu(CA)2(EtOH)]}n (2), and {(Hha)2[Cu(CA)2]}n (3) (ha = hexylamine), have been synthesized and characterized. The hexylaminium cations are introduced between the anionic layers of the metal-chloranilate by not only electrostatic interactions but also hydrogen bonding interactions. These compounds show reversible EtOH adsorption and desorption accompanied by a structural transformation...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28198480/di-and-octa-nuclear-dysprosium-clusters-derived-from-pyridyl-triazole-based-ligand-dy2-showing-single-molecule-magnetic-behaviour
#13
Muhammad Nadeem Akhtar, Xiao-Fen Liao, Yan-Cong Chen, Jun-Liang Liu, Ming-Liang Tong
Two dysprosium aggregates, formulated as [Dy2(μ-OH)2(H2bpte)2Cl2(MeOH)2]Cl2 (1), and [Dy8(μ-OH)8(bpte)8]·24H2O (2) (H2bpte = 1,2-bis(3-(pyridin-2-yl)-1H-1,2,4-triazol-5-yl)ethane), were obtained using solvothermal reactions. Upon changing the metal salt and synthetic reaction conditions, an eight-member {Dy8} (2) ring was isolated. Complex 1 is centrosymmetric in which two {Dy2} clusters are connecting to each other through the hydrogen bonding. Complex 2 forms an eight-member Dy(III) ring with an inner diameter of 4...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28198476/synthesis-of-hydroxyl-functionalized-n-heterocyclic-carbene-gold-i-complexes-and-peptide-conjugates
#14
Tobias Diehl, Melanie T S Krause, Sven Ueberlein, Stefanie Becker, Aline Trommer, Gregor Schnakenburg, Marianne Engeser
The synthesis and characterization of a series of new cationic gold(i) complexes with hydroxyl-functionalized N-heterocyclic carbene (NHC) ligands is described. They are valuable building blocks for further derivatization: as a first example, coupling with amino acids and a dipeptide, respectively, successfully results in amino acid and peptide conjugates that are hard to obtain by other synthetic routes.
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28197616/co-iii-complexes-of-1-3-selenazol-2-yl-hydrazones-and-their-sulphur-analogues
#15
Nenad R Filipović, Hana Elshaflu, Sonja Grubišić, Ljiljana S Jovanović, Marko Rodić, Irena Novaković, Aleksandar Malešević, Ivana S Djordjević, Haidong Li, Nešo Šojić, Aleksandar Marinković, Tamara R Todorović
The first Co(iii) complexes with (1,3-selenazol-2-yl)hydrazones as an unexplored class of ligands were prepared and characterized by NMR spectroscopy and X-ray diffraction analysis. The novel ligands act as NNN tridentate chelators forming octahedral Co(iii) complexes. The impact of structural changes on ligands' periphery as well as that of isosteric replacement of sulphur with selenium on the electrochemical and electronic absorption features of complexes are explored. To support the experimental data, density functional theory (DFT) calculations were also conducted...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28197612/crystal-structure-and-spin-trimer-magnetism-of-rb2-3-h2o-0-8mn3-b4p6o24-o-oh-2
#16
Olga V Yakubovich, Larisa V Shvanskaya, Galina V Kiriukhina, Anatoly S Volkov, Olga V Dimitrova, Evgeny A Ovchenkov, Alexander A Tsirlin, Alexander A Shakin, Olga S Volkova, Alexander N Vasiliev
The novel borophosphate Rb2.3(H2O)0.8Mn3[B4P6O24(O,OH)2] was prepared under hydrothermal conditions at 553 K. Its crystal structure was determined using single-crystal X-ray diffraction data obtained from a non-merohedral twin and refined against F(2) to R = 0.057. The compound crystallizes in the orthorhombic space group Pbcn, with unit-cell parameters a = 20.076(2) Å, b = 9.151(1) Å, c = 12.257(1) Å, V = 2251.8(2) Å(3), and Z = 4. The title compound is the first example of a borophosphate with manganese ions adopting both octahedral and tetrahedral coordinations...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28197610/novel-and-easy-access-to-highly-luminescent-eu-and-tb-doped-ultra-small-caf2-srf2-and-baf2-nanoparticles-structure-and-luminescence
#17
Benjamin Ritter, Philipp Haida, Friedrich Fink, Thoralf Krahl, Kornelia Gawlitza, Knut Rurack, Gudrun Scholz, Erhard Kemnitz
A universal fast and easy access at room temperature to transparent sols of nanoscopic Eu(3+) and Tb(3+) doped CaF2, SrF2 and BaF2 particles via the fluorolytic sol-gel synthesis route is presented. Monodisperse quasi-spherical nanoparticles with sizes of 3-20 nm are obtained with up to 40% rare earth doping showing red or green luminescence. In the beginning luminescence quenching effects are only observed for the highest content, which demonstrates the unique and outstanding properties of these materials...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28197604/anneal-induced-transformation-of-phase-structure-morphology-and-luminescence-of-gdpo4-sm-3-nanomaterials-synthesized-by-a-hydrothermal-method
#18
Xiao Zou, Lihua He, Dihao Tan, Fengying Lei, Na Jiang, Qiaoji Zheng, Dunmin Lin, Chenggang Xu, Yongfu Liu
GdPO4·H2O:xSm(3+) nanomaterials were synthesized via a facile hydrothermal method and the effects of Sm(3+) concentrations and annealing temperature on the crystal structures, morphologies, and luminescent properties were studied. Doping of Sm(3+) exhibited no obvious influence on the crystal structure for the non-annealed samples, which possessed a hexagonal structure and a nanorod shape. Under 401 nm excitation, GdPO4·H2O:xSm(3+) displays a typical emission band with several peaks at 560, 596, and 640 nm...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28197594/selenium-makes-the-difference-protonation-of-fefe-hydrogenase-mimics-with-diselenolato-ligands
#19
Hassan Abul-Futouh, Mohammad El-Khateeb, Helmar Görls, Khalil Jamil Asali, Wolfgang Weigand
The synthetic models of the active site of an [FeFe]-hydrogenase containing a Sn atom in the bridgehead of the diselenato ligand, namely [Fe2(CO)6{μ-(SeCH2Se)SnMe2}], 3 and [Fe2(CO)6{μ-(SeCH2)2SnMe2}], 4 have been synthesized and characterized by different spectroscopic methods. The protonation properties of complex 4 have been investigated by monitoring the IR spectra in the carbonyl stretching region, (1)H NMR in the hydride region as well as the (77)Se{H} NMR upon addition of strong and moderate acids wherein the protonation of the active site of the [FeFe]-hydrogenase at one of its internal basic sites is considered an essential step in the catalytic cycle...
February 15, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28194471/rigid-versus-semi-rigid-bis-imidazole-ligands-in-the-assembly-of-two-co-ii-coordination-polymers-structural-variability-electrochemical-properties-and-photocatalytic-behavior
#20
Jing-Wang Cui, Suo-Xia Hou, Kristof Van Hecke, Guang-Hua Cui
The hydrothermal reactions of 1,2,4,5-cyclohexanetetracarboxylic acid (H4L) with CoCl2·2H2O and rigid or semi-rigid bis(imidazole) ligands were able to generate two Co(ii) coordination polymers (CPs), {[Co5(L)2(1,4-bimb)(μ3-OH)2(H2O)8]·2H2O}n (1), {[Co(L)0.5(1,4-bib)]·H2O}n (2) (1,4-bimb = 1,4-bis(imidazol-1-ylmethyl)benzene, 1,4-bib = 1,4-bis(1H-imidazol-1-yl)benzene). CPs 1 and 2 were structurally characterized by elemental analysis, IR spectroscopy, X-ray powder diffraction and single crystal X-ray diffraction...
February 14, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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