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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/28440388/formation-of-exceptionally-weak-c-c-bonds-by-metal-templated-pinacol-coupling
#1
E Folkertsma, S H Benthem, L Witteman, C A M R van Slagmaat, M Lutz, R J M Klein Gebbink, M-E Moret
The ability of the bis(imidazolyl)ketone ligand BM(diPh)IK (bis(1-methyl-4,5-diphenylimidazolyl)ketone) to function as a redox active ligand has been investigated. The reduction of [M(BM(diPh)IK)Cl2] (M = Fe and Zn) complexes resulted in a pinacol-type coupling to form dinuclear complexes featuring very weak and abnormally elongated C-C bonds (1.729(5) and 1.708(3) Å for Fe and Zn, respectively). Oxidation of these complexes using ferrocenium in the presence of Cl(-) ions regenerated the original [M(BM(diPh)IK)Cl2] complexes, showing the reversibility of the coupling process...
April 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28440382/ph-dependent-structural-diversity-of-a-2-pyridinemethanol-cu-complex-and-its-relatively-strong-magnetic-exchange-coupling-via-hydrogen-bonding
#2
Tomohiko Hamaguchi, Tomoko Nagata, Shinya Hayami, Satoshi Kawata, Isao Ando
The diversity of the self-assembled structures of a Cu complex via hydrogen bonding, including a square planar unit, is reported. The Cu complex forms two self-assembled structures by hydrogen bonding, depending on the acidity of the recrystallization conditions. A linear chain structure can be produced under acidic conditions, and a three-dimensional network structure is observed under basic conditions. The linear chain structure is constructed from intermolecular sharing of a hydrogen atom between two 2-pyridinemethanolate units, with an OO distance of 2...
April 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28440368/mangiferin-functionalized-radioactive-gold-nanoparticles-mgf-198-aunps-in-prostate-tumor-therapy-green-nanotechnology-for-production-in-vivo-tumor-retention-and-evaluation-of-therapeutic-efficacy
#3
A Y Al-Yasiri, M Khoobchandani, C S Cutler, L Watkinson, T Carmack, C J Smith, M Kuchuk, S K Loyalka, A B Lugão, K V Katti
We report here an innovative feature of green nanotechnology-focused work showing that mangiferin-a glucose functionalized xanthonoid, found in abundance in mango peels-serves dual roles of chemical reduction and in situ encapsulation, to produce gold nanoparticles with optimum in vivo stability and tumor specific characteristics. The interaction of mangiferin with a Au-198 gold precursor affords MGF-(198)AuNPs as the beta emissions of Au-198 provide unique advantages for tumor therapy while gamma rays are used for the quantitative estimation of gold within the tumors and various organs...
April 25, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436525/graphitic-c3n4-nanosheets-synergistic-effects-of-hydrogenation-and-n-n-junctions-for-enhanced-photocatalytic-activities
#4
Minjie Zhou, Zhaohui Hou, Xiaobo Chen
The increasing concern about environmental pollution and fossil fuel energies have urged researchers to seek renewable energy sources and methods for pollutant decomposition. Photocatalysis seems to be one of the most promising approaches, which uses natural sunlight to produce hydrogen from water and removes organic pollutants from the environment. Among the various photocatalysts, graphitic carbon nitride (g-C3N4) has recently attracted much attention as a metal-free photocatalyst; however, it did not give a satisfactory performance...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436524/tio2-and-cu1-5mn1-5o4-co-modified-hierarchically-porous-zeolite-beta-for-soot-oxidation-with-excellent-sulfur-resistance-and-stability
#5
X X Zhou, H Zhao, W M Huang, H R Chen, J L Shi
TiO2 and spinel Cu1.5Mn1.5O4 co-modified hierarchically porous zeolite Beta (Ti/Cu1.5Mn1.5O4-HBeta) with 3D interpenetrating micro-mesoporosity has been synthesized, which showed highly efficient catalytic activity to the soot oxidation in the presence of O2/NO/N2 due to the rich moderate intensity acidic sites and chemisorbed oxygen species. In the presence of SO2/O2/NO/N2, the SO2 could be preferentially adsorbed on the Ti/Cu1.5Mn1.5O4-HBeta and the resulting sulfates could easily decompose at elevated temperatures, thus leading to significantly improved sulfur-resistance...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436520/multimetallic-complexes-synthesis-and-applications
#6
EDITORIAL
John F Berry, Christine M Thomas
No abstract text is available yet for this article.
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436519/a-ruthenium-ii-bis-phosphinophosphinine-complex-as-a-precatalyst-for-transfer-hydrogenation-and-hydrogen-borrowing-reactions
#7
R J Newland, M F Wyatt, R L Wingad, S M Mansell
The 2-phosphinophosphinine 2-PPh2-3-Me-6-SiMe3-PC5H2 (2) has been prepared and was shown to act as a κ(2)-chelating ligand in cis-[RuCl2(2)2] (4). Complex 4 was a competent precatalyst for the room temperature transfer hydrogenation of acetophenone (0.1 mol% 4 and 0.5 mol% KO(t)Bu) and the conversion of methanol/ethanol mixtures to the advanced biofuel isobutanol in 50% yield and 96% selectivity.
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436511/self-template-synthesis-of-cds-nisx-heterostructured-nanohybrids-for-efficient-photocatalytic-hydrogen-evolution
#8
You Xu, Wenguang Tu, Shengming Yin, Markus Kraft, Qichun Zhang, Rong Xu
Photocatalytic hydrogen (H2) evolution from water splitting is attracting enormous interest due to the possibility of converting solar energy into green chemical energy. The construction of highly efficient and stable photocatalysts is of importance and necessary for the development of photocatalytic water splitting technology. In this study, we have developed a self-template synthetic strategy for the preparation of heterostructured nanohybrids composed of ultrasmall CdS and NiSx nanoparticles by using Cd(ii)-Ni(ii)-(4,4'-bipyridine) coordination polymers as the precursor and template...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436505/well-defined-functional-mesoporous-silica-polymer-hybrids-prepared-by-an-icar-atrp-technique-integrated-with-bio-inspired-polydopamine-chemistry-for-lithium-isotope-separation
#9
Yuekun Liu, Xuegang Liu, Gang Ye, Yang Song, Fei Liu, Xiaomei Huo, Jing Chen
Mesoporous silica/polymer hybrids with well-preserved mesoporosity were prepared by integrating the initiators for continuous activator regeneration (ICAR) atom transfer radical polymerization (ATRP) technique with the bio-inspired polydopamine (PDA) chemistry. By manipulating the auto-oxidative polymerization of dopamine, uniform PDA layers were deposited on the surfaces and pore walls of ordered mesoporous silicas (OMSs), thereby promoting the immobilization of ATRP initiators. Poly(glycidyl methacrylate) (PGMA) brushes were then grown from the OMSs by using the ICAR ATRP technique...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436501/bis-zn-ii-salphen-complexes-bearing-pyridyl-functionalized-ligands-for-efficient-organic-light-emitting-diodes-oleds
#10
Jiang Zhao, Feifan Dang, Boao Liu, Yong Wu, Xiaolong Yang, Guijiang Zhou, Zhaoxin Wu, Wai-Yeung Wong
Inspired by the emissive features of Zn(II) complexes based on bis-Schiff base ligands, bis-Zn(II) salphen complexes bearing pyridyl functionalized ligands have been successfully synthesized. Their photophysical features, electrochemical behavior and electroluminescent (EL) properties have been investigated in detail. The functionalized bis-Zn(II) salphen complexes can exhibit high thermal stability up to 417 °C, and their photoluminescence (PL) spectra show a maximal emission wavelength peak at ca. 565 nm both in solution and PMMA doped films...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28436497/metal-ion-binding-by-laterally-non-symmetric-macrobicyclic-oxa-aza-cryptands
#11
Parimal K Bharadwaj
Macrobicyclic cryptands incorporating amine groups along with oxygen donors that are laterally non-symmetric constitute an important class of organic compounds. These molecules can form inclusion complexes with different transition and main group metal ions. It is also possible to modify the binding characteristics of these compounds through attachment of different groups. Some of these metal complexes can be useful homogeneous catalysts in different organic transformations. If there are chiral centers present in the cryptands, they can be useful in asymmetric syntheses...
April 24, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28430282/a-ratiometric-sensor-for-dna-based-on-a-dual-emission-ru-dppz-light-switch-complex
#12
Michael G Walker, Vadde Ramu, Anthony J H M Meijer, Amitava Das, Jim A Thomas
Herein we describe the DNA binding properties of two new water-soluble ruthenium complexes; experimental and computational data reveal that both complexes display dual emission from MLCT and LLCT excited states. The interaction of the new complexes with DNA was also investigated. Although one of the complexes only binds DNA though groove binding, the second complex has separate ligands capable of groove binding and intercalation. Nevertheless, it was found that both complexes interact with duplex DNA with high affinity...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28430280/potassium-complexes-supported-by-monoanionic-tetradentate-amino-phenolate-ligands-synthesis-structure-and-catalysis-in-the-ring-opening-polymerization-of-rac-lactide
#13
Chenhui Yao, Yang Yang, Shaoan Xu, Haiyan Ma
A series of potassium complexes bearing monoanionic tetradentate amino-phenolate ligands, [LK]2 (L = {(2-R(1))C6H4CH2N[(CH2)2R(2)]CH2(4-R(4)-6-R(3))C6H2O-}, R(1) = NMe2, R(2) = NEt2, R(3) = CPh3, R(4) = Me (1); R(1) = R(2) = NEt2, R(3) = CPh3, R(4) = Me (2); R(1) = NMe2, R(2) = NEt2, R(3) = R(4) = cumyl (4); R(1) = R(2) = OMe, R(3) = (t)Bu, R(4) = Me (6); L = (2-NMe2)C6H4CH2N[[CH2-(S)-1-butylpyrrolidinyl]CH2(4-Me-6-CPh3)C6H2O-] (3)), have been synthesized via reactions of KN(SiMe3)2 and 1 equiv. of the corresponding aminophenols...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28430272/molecular-rare-earth-metal-alumosilicates
#14
Raúl Huerta-Lavorie, Dana V Báez-Rodríguez, Jessica García-Ríos, Emiliano Martínez-Vollbert, Diego Martínez-Otero, Vojtech Jancik
The synthesis and stabilization of molecular four-coordinated lanthanide alumosilicates was achieved by the use of a highly encumbered alumosilicate ligand LAl(OH·thf)(μ-O)Si(OH)(OtBu)2 (1, L = HC{C(Me)N(2,6-iPr2C6H3)}2). Reactions between 1 and tris-cyclopentadienyl lanthanides (LnCp3; Ln = Ce, Nd, Sm, Gd, Tb, Dy, Y, Er) derived in the isolation of eight compounds (2-9) where the ligand is observed in three different bonding modes: adducts (2, 3), spirocyclic (4) or cyclic (5-9) coordination compounds. The observed reactivity can be related to the ionic radius of the lanthanide atom and the nature of the oxygen donor-atom from the hydroxide (Al-OH) or hydroxyl (Si-OH) moieties in 1...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28429813/rh-catalyzed-direct-arylation-of-a-polyhedral-oligomeric-silsesquioxane
#15
Hiroaki Imoto, Satoshi Wada, Kensuke Naka
The electronic properties of polyhedral oligomeric silsesquioxanes (POSS) have recently been subjected to study. Although theoretical calculations have predicted that POSS can work as an acceptor for π-conjugated organic units, an effective reaction to incorporate aryl groups into a POSS backbone remains to be established. In this work, Rh-catalyzed direct arylation has been developed. Heptaisobutyl-POSS with a Si-H group was reacted with various aryl halides to form aryl-substitued POSSs.
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28429812/hollow-hematite-single-crystals-deposited-with-ultra-thin-al2o3-by-atom-layer-deposition-for-improved-photoelectrochemical-performance
#16
Wei Jiao, Jingrui Wu, Siwen Cui, Ning Wei, Zia Ur Rahman, Meiyan Yu, Shougang Chen, Yangtao Zhou, Daoai Wang
Hematite (α-Fe2O3) is a red material with a band gap of about 2.0 eV, which indicates that it can absorb more solar light. It is a promising photocatalyst applied in many fields. In this paper, α-Fe2O3 single crystal hollow hexagonal bipyramids were synthesized by a simple one-pot hydrothermal method. The morphology and structure of the prepared α-Fe2O3 hollow hexagonal bipyramids were studied using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray diffraction (XRD). The hollow single crystals show a good light absorption and performance in photodegradation of methylene blue (MB)...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28429811/synthesis-and-structural-characterisation-of-the-aggregates-of-benzo-1-2-chalcogenazole-2-oxides
#17
Peter C Ho, Jamal Rafique, Jiwon Lee, Lucia M Lee, Hilary A Jenkins, James F Britten, Antonio L Braga, Ignacio Vargas-Baca
Iodine oxidation of bis[2-(hydroxyiminomethyl)phenyl] dichalcogenides yields benzo-1,2-chalcogenazole 2-oxides. Annulated derivatives of iso-tellurazole N-oxides spontaneously aggregate into cyclic tetra- and hexamers through TeO chalcogen bonding; the structures of the co-crystals with benzene and CH2Cl2 illustrate the ability of these macrocycles to interact with small guest molecules. The selenium congener crystallizes forming a supramolecular polymer. VT NMR indicates that both compounds aggregate in solution but only at low temperature in the selenium case...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28429021/preparation-and-characterization-of-metastable-trigonal-layered-msb2o6-phases-m-co-ni-cu-zn-and-mg-and-considerations-on-fesb2o6
#18
A Yu Nikulin, E A Zvereva, V B Nalbandyan, I L Shukaev, A I Kurbakov, M D Kuchugura, G V Raganyan, Yu V Popov, V D Ivanchenko, A N Vasiliev
MSb2O6 compounds (M = Mg, Co, Ni, Cu, Zn) are known in the tetragonal trirutile forms, slightly distorted monoclinically with M = Cu due to the Jahn-Teller effect. In this study, using a low-temperature exchange reaction between ilmenite-type NaSbO3 and molten MSO4-KCl (or MgCl2-KCl) mixtures, these five compositions were prepared for the first time as trigonal layered rosiaite (PbSb2O6)-type phases. Upon heating, they irreversibly transform to the known phases via amorphous intermediates, in contrast to previously studied isostructural MnSb2O6, where the stable phase is structurally related to the metastable phase...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28429019/facile-syntheses-of-pure-uranium-halides-ucl4-ubr4-and-ui4
#19
Stefan S Rudel, Florian Kraus
Herein we describe convenient lab scale syntheses of several uranium(iv) halides of high purity by reaction of AlX3 (X = Cl, Br and I) with UO2, which is readily available by reduction of uranyl salts like UO2(NO3)2·6H2O. UCl4, UBr4, and UI4 are obtained in the form of aggregates of large single crystals. Their identities and purity were checked by powder X-ray diffraction, IR spectroscopy and elemental analysis. The syntheses introduced here avoid the need for pure metallic uranium and are based on more readily available starting materials, UO2, which does not even have to be pure, and the respective aluminium halide...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28429014/formation-of-mono-and-binuclear-neodymium-iii-gluconate-complexes-in-aqueous-solutions-in-the-ph-range-of-2-8
#20
Bence Kutus, Norbert Varga, Gábor Peintler, Alexandru Lupan, Amr A A Attia, István Pálinkó, Pál Sipos
The complex formation between Nd(iii) and d-gluconate (Gluc(-)) is of relevance in modelling the chemical equilibria of radioactive waste repositories. In the present work, the formation of NdpGlucqH-r complexes at 25 °C and pH = 2-8 was studied via spectrophotometry, potentiometry, freezing point depression, conductometry and NMR spectroscopy. In addition to the four mononuclear complexes (pq-r = 110, 120, 130 and 11-2), the formation of two binuclear, so far unknown complexes (pq-r = 23-2 and 24-2) was revealed...
April 21, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
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