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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/29350743/facile-preparation-of-carbon-dot-supported-nanoflowers-for-efficient-photothermal-therapy-of-cancer-cells
#1
Changshun Hou, Shiqing Chen, Mengqi Wang
Herein, novel self-assembled red-emissive C-dots@Au nanoflowers were developed, and they demonstrated efficient photothermal properties under 750 nm laser irradiation. Moreover, C-dots@Au nanoflowers showed the ability of simultaneous photoacoustic and fluorescence imaging. Our study may provide a novel strategy for the efficient phototherapy of cancer cells based on C-dots.
January 19, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29350728/dual-chain-extension-effect-and-antibacterial-properties-of-biomolecules-interleaved-within-ldh-dispersed-into-pbs-by-in-situ-polymerization
#2
Grazia Totaro, Laura Sisti, Annamaria Celli, Irene Aloisio, Diana Di Gioia, Adam A Marek, Vincent Verney, Fabrice Leroux
Nanocomposites based on poly(butylene succinate) (PBS) and hydrotalcite-type anionic clays (HTs) organo-modified with biomolecules characterized by antibacterial and/or antioxidant activities, such as l-ascorbic acid (ASA), phloretic acid (HPP), l-tyrosine (TYR) and l-tryptophan (TRP), have been prepared by in situ polymerization. From XRD analysis and rheology experiments in a molten polymer state, intercalated HT hybrid platelets acting here as a hybrid filler are found to be well dispersed into polymers while providing a chain extension effect on PBS...
January 19, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29349477/isomerism-and-reactivity-of-nickel-ii-acetylacetonate-bis-thiosemicarbazone-complexes
#3
Jessica K Bilyj, Mark J Riley, Paul V Bernhardt
The complexation of nickel(ii) with acetylacetonate bis(thiosemicarbazone) N2S2 ligands with varying substituents has revealed that two isomers can exist independently in solution. These isomers differ according to the formation of either a 5,6,5-membered (symmetric) or a 4,7,5-membered (asymmetric) chelate ring arrangement. These two isomers have distinctly different properties. The symmetric complex (sym-[Ni(acacR)]) is unstable in the presence of air and slowly converts to the oxidised analogue sym-[Ni(acacRO)] with a carbonyl group installed at the apical C-atom...
January 19, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29349461/oxygen-vacancy-rich-cu2o-based-composite-material-with-nitrogen-doped-carbon-as-matrix-for-photocatalytic-h2-production-and-organic-pollutant-removal
#4
Lele Lu, Xinxin Xu, Jiaming Yan, Fa-Nian Shi, Yuqiu Huo
A nitrogen doped carbon matrix supported Cu2O composite material (Cu/Cu2O@NC) was fabricated successfully with a coordination polymer as precursor through calcination. In this composite material, Cu2O particles with a size of about 6-10 nm were dispersed evenly in the nitrogen doped carbon matrix. After calcination, some coordinated nitrogen atoms were doped in the lattice of Cu2O and replace oxygen atoms, thus generating a large number of oxygen vacancies. In Cu/Cu2O@NC, the existence of oxygen vacancies has been confirmed by electron spin resonance (ESR) and X-ray photoelectron spectroscopy (XPS)...
January 19, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29345708/triphenylstannyl-arylimino-methyl-benzoates-with-selective-potency-that-induce-g1-and-g2-m-cell-cycle-arrest-and-trigger-apoptosis-via-ros-in-human-cervical-cancer-cells
#5
Tushar S Basu Baul, Imliwati Longkumer, Andrew Duthie, Priya Singh, Biplob Koch, M Fátima C Guedes da Silva
Metal complexes with organelle specificity and potent but selective cytotoxicity are highly desirable. A novel series of triphenylstannyl 4-((arylimino)methyl)benzoates (2-8) were obtained by the reactions of triphenylstannyl 4-formylbenzoate [Ph3Sn(L1)] 1 with primary aromatic amines. Two representative compounds (10, 11) were also synthesized by reacting aqua-triphenylstannyl 2-formylbenzoate [Ph3Sn(L9)(H2O)] (9) with aniline and p-fluoroaniline, respectively. These compounds were characterized by elemental analysis, IR and 1H, 13C and 119Sn NMR spectroscopy, as well as single-crystal X-ray diffraction for compounds 5, 7-11 and three pro-ligands...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29345706/tuning-the-nucleophilicity-of-electron-rich-diborane-4-compounds-with-bridging-guanidinate-substituents-by-substitution
#6
Julian Horn, Anna Widera, Sebastian Litters, Elisabeth Kaifer, Hans-Jörg Himmel
Diborane(4) compounds are versatile reagents in synthetic chemistry. Generally, diboranes(4) with sp2-hybridized boron atoms react as electrophiles. By contrast, the chemistry of nucleophilic diborane(4) compounds with two sp3-hybridized boron atoms is very much underdeveloped. In this work, we systematically vary the substituents of electron-rich diborane(4) compounds with bridging guanidinate substituents. In this way, five new diboranes are synthesized and fully characterized. Using quantum chemical computations, we show that the electronic properties and reactivity of these compounds can be rationally varied by the choice of substituents...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29345272/preparation-of-eu-iii-acetylacetonate-doped-well-defined-titania-particles-with-efficient-photoluminescence-properties
#7
Kota Shiba, Takuya Kataoka, Motohiro Tagaya
The aggregation/dispersion of luminescent species is a critical factor that determines their luminescence properties. In this study, europium(iii) acetylacetonate (Eu(acac)3) was doped into a titania matrix to form Eu(acac)3-doped titania particles with well-defined size and shape through a microreactor-based sol-gel approach. The morphology and structure of the as-synthesized products were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, scanning transmission electron microscopy and X-ray diffraction measurements...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29345268/homoleptic-u-iii-and-u-iv-amidate-complexes
#8
M D Straub, S Hohloch, S G Minasian, J Arnold
The syntheses of the first homoleptic U(iii) and U(iv) amidate complexes are described. These can be interconverted by chemical reduction/oxidation, showing an unusual change in coordination number from four in the U(iii) complex to eight in the U(iv) complex in the solid state structures.
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29345262/copper-i-complexes-with-phosphine-derived-from-sparfloxacin-part-iii-multifaceted-cell-death-and-preliminary-study-of-liposomal-formulation-of-selected-copper-i-complexes
#9
A Kyzioł, A Cierniak, J Gubernator, A Markowski, M Jeżowska-Bojczuk, U K Komarnicka
The cytotoxic effect of iodide or thiocyanate copper(i) complexes (1-PSf, 2-PSf, 3-PSf, 4-PSf) with phosphine derived from sparfloxacin (HSf) and 2,9-dimethyl-1,10-phenanthroline (dmp) or 2,2'-biquinoline (bq) as diimine auxiliary ligands was proved in vitro on somatic (MRC-5) and neoplastic (MCF7) human cell lines. Differences in mode of action were investigated in-depth for the selected dmp and bq complexes (1-PSf, 3-PSf, respectively) by elucidation of the following: (i) the efficiency to produce reactive oxygen species (ROS) in biological systems (cyclic voltammetry); (ii) their impact on mitochondrial membrane potential; (iii) potency for the activation of caspases 3 and 9; (iv) influence on the degree of DNA degradation (comet assay)...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29344596/superstructure-ta2o5-mesocrystals-derived-from-nh4-2ta2o3f6-mesocrystals-with-efficient-photocatalytic-activity
#10
Xin Yu, Wei Li, Jian Huang, Zhonghua Li, Jiawen Liu, PingAn Hu
Superstructured mesocrystalline Ta2O5 nanosheets were successfully prepared from mesocrystalline (NH4)2Ta2O3F6 nanorods by the annealing method for the first time. The as-prepared mesocrystalline Ta2O5 nanosheets in this work showed remarkable visible light absorption, mainly due to the formation of oxygen vacancy defects in the mesocrystalline Ta2O5 nanosheets, which was also confirmed by XPS spectra, Raman spectra and EPR spectra. Besides, the mesocrystalline Ta2O5 nanosheets showed a highly enhanced photocatalytic activity of 11 268...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29344593/biologically-inspired-oxidation-catalysis-using-metallopeptides
#11
Laia Vicens, Miquel Costas
The stereoselective oxidation of hydrocarbons is one of the most challenging reactions for synthetic chemists. However, this transformation is one of the most common reactions in nature. Metalloenzymes that catalyze this transformation are taken as inspiration for the development of new catalysts. There are several examples in the literature where either peptides or metal catalysts are used in the stereoselective oxidation reaction, but the synergistic combination of both systems is still a non-explored field...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29344590/magnetic-anisotropy-investigation-on-light-lanthanide-complexes
#12
Mei-Xing Xu, Yin-Shan Meng, Jin Xiong, Bing-Wu Wang, Shang-Da Jiang, Song Gao
Herein, a series of light lanthanide-based complexes, Ln(fdh)3(bpy) (Ln = CeIII, PrIII, and NdIII and fdh = 1,1,1-fluoro-5,5-dimethyl-hexa-2,4-dione, bpy = 2,2'-bipyridine), were synthesized and characterized. The angle-resolved magnetometry studies reveal that the three complexes have Ising-type anisotropy, and the magnetic easy axes orient along the negative charge dense direction in the crystal field. The results were consistent with the ab initio calculations. This research demonstrates that the crystal field electron density distribution determines the anisotropy of light lanthanides...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29344588/a-helical-chain-like-organic-inorganic-hybrid-arsenotungstate-with-color-tunable-photoluminescence
#13
Hechen Wu, Rong Wan, Yanan Si, Pengtao Ma, Jingping Wang, Jingyang Niu
A 1-D infinite helical chain-like organic-inorganic hybrid arsenotungstate Na4H8[{Pr(H2O)2}2{As2W19O68}{WO2(mal)}2]·24H2O (mal = malate) (1) was prepared, which was characterized by elemental analyses, thermogravimetric (TG) analyses, IR spectroscopy, powder X-ray diffraction (PXRD) and X-ray single-crystal diffraction. Structural characterization revealed that 1 comprises the organo-functionalized [{As2W19O68}{WO2(mal)}2]18- polyanions hinged together by the Pr3+ ions forming a 1-D infinite helical chain-like architecture...
January 18, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29340415/alkaline-earth-metal-phenylphosphonates-and-their-intercalation-chemistry
#14
Klára Melánová, Ludvík Beneš, Jan Svoboda, Vítězslav Zima, Miroslav Pospíšil, Petr Kovář
The intercalation chemistry of layered alkaline-earth metal phenylphosphonates with the general formula MeC6H5PO3·2H2O (Ca, Sr, Ba) is reviewed. The preparation of the host materials is described and their behavior in dependence on the relative humidity and pH of the reaction medium is discussed. Mutual relationships between MeC6H5PO3·2H2O and Me(C6H5PO3H)2 were investigated using a method of computer-controlled addition of reagents. The MeC6H5PO3·2H2O compounds are able to intercalate species having a free electron pair through the so-called coordination intercalation...
January 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29340398/synthesis-and-crystal-structure-of-sr3bi2o6-and-structural-change-in-the-strontium-bismuth-oxide-system
#15
Yanquan Yang, Jian Li, Youyou Yuan, Fengjuan Pan, Dier Shi, Cong Lin, Xin Du, Junliang Sun
The crystal structures and their changing trend in the strontium-bismuth-oxide system are critical for the studies of the related systems and their applications. The crystal structure of Sr3Bi2O6 was obtained for the first time in the space group of R3[combining macron] with a huge unit cell of a = b = 25.1146(19) Å and c = 18.3685(16) Å and all bismuth ions are Bi3+ forming [BiO3] trigonal pyramids. Sr3Bi2O6 is a key compound for the structural change trend in the SrO-Bi2O3 binary oxide system at 1000 °C...
January 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29340397/ligand-modification-of-uio-66-with-an-unusual-visible-light-photocatalytic-behavior-for-rhb-degradation
#16
Xixi Mu, Jifei Jiang, Fufang Chao, Yongbing Lou, Jinxi Chen
A series of isostructural UiO-66-X (X = H, NH2, Br, (OH)2, (SH)2) catalysts have been successfully synthesized by modifying different functional groups on the ligand. The effects of the ligand modification of UiO-66 were investigated for their photocatalytic activity of Rhodamine B degradation under visible light. Surprisingly, UiO-66-NH2 and UiO-66-(OH)2 which have narrow bandgaps and excellent visible light absorption do not show outstanding photocatalytic performances compared to UiO-66 and UiO-66-Br. Electrochemical test results indicated that the conduction band potential of UiO-66-X and the separation efficiency of electrons were quite important in these photocatalytic reactions, other than the electronic effect as reported...
January 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29340396/synthesis-and-antiproliferative-activity-of-a-series-of-new-platinum-and-palladium-diphosphane-complexes
#17
Carleen Cullinane, Glen B Deacon, Penny R Drago, Anja P Erven, Peter C Junk, Jenny Luu, Gerd Meyer, Simon Schmitz, Ingo Ott, Julia Schur, Lorraine K Webster, Axel Klein
New organometallic complexes [M(dppe)(R)2] {where M = Pt or Pd, dppe = 1,2-bis(diphenylphosphano)ethane, and R = C6F4H-x (x = 6,5,4), C6F3H2-3,5, C6F3H2-5,6, C6F3H2-3,6, C6F4(OMe)-4, and C6F4(cyclo-C5H10N)-4, the numbers x refer to the positions of the protons in the polyfluoroaryl ligands} were synthesised either through transmetalation from the dichlorido complexes [M(dppe)Cl2] or through ligand exchange using [M(diene)Cl2] precursor complexes with diene = 1,5-cyclooctadiene (cod) or 1,5-hexadiene (hex). Alternatively, [M(dppX)Cl(R)] complexes with dppX = dppm (1,1-bis(diphenylphosphano)methane), dppe, dppp (1,3-bis(diphenylphosphano)propane), and dppb (1,4-bis(diphenylphosphano)butane) were prepared in decarboxylation reactions from thallium(i) carboxylates Tl(O2CR)...
January 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29340394/highly-selective-hydrosilylation-of-olefins-and-acetylenes-by-platinum-0-complexes-bearing-bulky-n-heterocyclic-carbene-ligands
#18
P Żak, M Bołt, M Kubicki, C Pietraszuk
Platinum complexes bearing bulky N-heterocyclic carbene (NHC) ligands, i.e., [Pt(IPr*)(dvtms)] (where, IPr* = 1,3-bis{2,6-bis(diphenylmethyl)-4-methylphenyl}imidazol-2-ylidene) and [Pt(IPr*OMe)(dvtms)] (where, IPr*OMe = 1,3-bis{2,6-bis(diphenylmethyl)-4-methoxyphenyl}imidazol-2-ylidene, dvtms = divinyltetramethyldisiloxane) catalyse nearly quantitatively and highly or completely the selective hydrosilylation of terminal olefins as well as terminal or internal acetylenes.
January 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29340393/ferrocenyl-sulfonium-ionic-liquids-synthesis-characterization-and-electrochemistry
#19
Alexander Venker, Tobias Vollgraff, Jörg Sundermeyer
New ferrocenylsulfonium cation based ionic liquids were prepared by direct alkylation of the corresponding ferrocenyl-based thioethers with N-alkylbis(trifluoromethanesulfonyl)imides (R'TFSI). This convenient direct access to organometallic sulfonium bis(trifluoromethanesulfonyl)imide (TFSI) salts without the need for ion exchange was chosen in order to obtain highly pure and reversibly redox active room temperature ILs in many cases. In other cases the anion cation interaction in the solid state was studied by XRD analyses...
January 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29340387/pb3-seo3-br4-a-new-nonlinear-optical-material-with-enhanced-shg-response-designed-via-an-ion-substitution-strategy
#20
Xiaoxiao Wang, Xingxing Jiang, Hongming Liu, Lei Yang, Zheshuai Lin, Zhanggui Hu, Xianggao Meng, Xingguo Chen, Jingui Qin
Using an ion-substitution strategy, herein, a new polar material, Pb3(SeO3)Br4, with a greatly enhanced SHG response has been successfully designed and synthesized through a hydrothermal reaction. Pb3(SeO3)Br4 crystallizes in the NCS space group P212121 and consists of a three-dimensional framework formed by interconnecting one-dimensional chains, with a good thermal stability up to 230 °C. This compound exhibits a phase-matchable SHG response as strong as that of KH2PO4 (KDP) and a relatively wide mid-infrared (mid-IR) transparent window...
January 17, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
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