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Dalton Transactions: An International Journal of Inorganic Chemistry

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https://www.readbyqxmd.com/read/30431035/phosphomolybdic-acid-as-an-efficient-hole-injection-material-in-perovskite-optoelectronic-devices
#1
Vahid Fallah Hamidabadi, Cristina Momblona, Daniel Pérez-Del-Rey, Ali Bahari, Michele Sessolo, Henk J Bolink
Efficient perovskite devices consist of a perovskite film sandwiched between charge selective layers, in order to avoid non-radiative recombination. A common metal oxide used as a p-type or hole transport layer is molybdenum oxide. MoO3 is of particular interest for its very large work function, which allows it to be used both as an interfacial charge transfer material and a dopant for organic semiconductors. However, high quality and high work function MoO3 is typically thermally evaporated in a vacuum. An alternative solution-processable high work function material is phosphomolybdic acid (PMA), which is stable, commercially available and environmentally friendly...
November 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30431029/ruthenium-ii-polypyridyl-doped-zirconium-iv-metal-organic-frameworks-for-solid-state-electrochemiluminescence
#2
Meng Cai, Quentin R Loague, Jie Zhu, Shaoyang Lin, Pavel M Usov, Amanda J Morris
Solid-state electrochemiluminescence (ECL) has drawn increasing attention due to its advantages over solution-phase ECL, such as reducing the consumption of expensive reagents and enhancing the ECL signal. Herein we report a ruthenium(ii)-polypyridyl doped zirconium(iv) metal-organic framework (MOF) film, UiO-67-Ru@FTO, for solid-state electrochemiluminescence. With tripropylamine (TPA) as a coreactant, UiO-67-Ru@FTO exhibited high ECL intensity and good stability. A linear relationship was found between the ECL intensity and TPA concentration in a wide range of 0...
November 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30430158/temperature-dependence-of-the-spin-state-and-geometry-in-tricobalt-paddlewheel-complexes-with-halide-axial-ligands
#3
Anandi Srinivasan, Xiaoping Wang, Rodolphe Clérac, Mathieu Rouzières, Larry R Falvello, John E McGrady, Elizabeth A Hillard
Trinuclear cobalt paddlewheel complexes, [Co3(dpa)4X2] (dpa = the anion of 2,2'-dipyridylamine, X = Cl-, Br-, -NCS-, -CN-, (NC)2N-), are known to demonstrate a thermally-induced spin-crossover (SCO). Despite a wealth of structural and magnetic information about such complexes, the role of the axial ligand on the characteristic SCO temperature (T1/2) remains ambiguous. The situation is complicated by the observation that the solid state geometry of the complexes, symmetric or unsymmetric, with respect to the central cobalt ion, also appears to influence the SCO behavior...
November 15, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427350/synthesis-of-quinolinyl-based-pincer-copper-ii-complexes-an-efficient-catalyst-system-for-kumada-coupling-of-alkyl-chlorides-and-bromides-with-alkyl-grignard-reagents
#4
Hanumanprasad Pandiri, Rajesh G Gonnade, Benudhar Punji
Quinolinamide-based pincer copper(ii) complexes, κN,κN,κN-{C9H6N-(μ-N)-C(O)CH2NEt2}CuX [(QNNNEt2)CuX (X = Cl, 2; X = Br, 3; X = OAc, 4)], were synthesized by the reaction of ligand (QNNNEt2)-H (1) with CuX2 (X = Cl, Br or OAc) in the presence of Et3N. The reaction of (QNNNEt2)-H with CuX (X = Cl, Br or OAc) also afforded the Cu(ii) complexes 2, 3 and 4, respectively, instead of the expected Cu(i) pincer complexes. The formation of Cu(ii) complexes from Cu(i) precursors most likely occurred via the disproportionation reaction of Cu(i) into Cu(0) and Cu(ii)...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427348/the-catalytic-behaviour-in-aqueous-phase-hydrogenation-over-a-renewable-ni-catalyst-derived-from-a-perovskite-type-oxide
#5
Chun Chen, Ruoyu Fan, Wanbing Gong, Haimin Zhang, Guozhong Wang, Huijun Zhao
Water is inevitably associated with the production of bio-derived platform molecules, but most supported metallic catalysts have poor water compatibility. Although there have been a great number of investigations regarding the hydrogenation of bio-derived unsaturated compounds in the organic phase, the reactions that proceed in water are still quite challenging. Herein, we report the synthesis of a supported nickel catalyst (Ni-LN650) by the reduction of the perovskite-type oxide LaNiO3 precursor at 650 °C...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427347/the-lanthanide-complexes-of-2-2-bipyridyl-6-6-dicarboxylic-dimethylanilides-the-influence-of-a-secondary-coordination-sphere-on-the-stability-structure-luminescence-and-f-element-extraction
#6
Nataliya E Borisova, Tsagana B Sumyanova, Anastasia V Kharcheva, Petr I Matveev, Alexey V Ivanov, Elizaveta A Razumova, Svetlana V Patsaeva
Four of the six possible isomeric 2,2'-bipyridyl-6,6'-dicarboxylic dimethylanilides were studied from the point of view of the impact of a secondary coordination sphere on the formation of complexes with lanthanides in solution, as well as the crystal structure and photophysical properties of the complexes. All ligands form complexes with a 1 : 1 metal-to-ligand ratio with an lg β1 in the range of 6.0-8.8, and strong correlations between secondary coordination sphere modulation and stability of the complexes within the lanthanide series...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427346/redox-state-dependent-activation-of-silanes-and-ammonia-with-reverse-polarity-pc-carbene-p-ni-complexes-electrophilic-vs-nucleophilic-carbenes
#7
Etienne A LaPierre, Warren E Piers, Chris Gendy
A rigidified PCalkylP ligand allowed for the synthesis and characterization of cationic and radical PCCarbeneP nickel complexes in which the carbene anchor of the pincer framework is electrophilic rather than nucleophilic. Alpha-hydride abstraction from a (PCalkylP)nickel halide complex readily leads to the cationic carbene complex, which furnishes the radical carbene complex by one electron reduction. The reactivity of these reverse polarity carbene complexes towards small molecules (H2, CO, CO2, R3SiH, NH3) reveals different modes of activation when compared to previously reported nucleophilic nickel carbene complexes, and a clear dependence on the redox state of the complex...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427345/hydroboration-of-carbon-dioxide-with-catechol-and-pinacolborane-using-an-ir-cnp-pincer-complex-water-influence-on-the-catalytic-activity
#8
Práxedes Sánchez, Martín Hernández-Juárez, Nuria Rendón, Joaquín López-Serrano, Eleuterio Álvarez, Margarita Paneque, Andrés Suárez
Iridium complexes based on deprotonated lutidine-derived CNP* pincers 2a/2b selectively catalyzed the hydroboration of CO2 under mild conditions (1-2 bar CO2, 30 °C) to methoxyborane using HBcat (TOF up to 56 h-1) and to the formate level with HBpin (TOF up to 1245 h-1). Interestingly, an intriguing, positive water effect on the reaction rates has been observed. NMR spectroscopy and ESI-MS analysis of the hydroboration reactions have shown the formation of ligand-protonated [Ir(CNP)(CO)(BR2)H][B(R2)2] (R2 = catecholate, pinacolate) derivatives under catalytic conditions...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427342/ru-loaded-mesoporous-wo-3-microflowers-for-dual-applications-enhanced-h-2-s-sensing-and-sunlight-driven-photocatalysis
#9
Swati S Mehta, Digambar Y Nadargi, Mohaseen S Tamboli, Latika S Chaudhary, Pramod S Patil, Imtiaz S Mulla, Sharad S Suryavanshi
We report a facile synthesis of Ru-loaded WO3 marigold structures through a hydrothermal route and their bidirectional applications as enhanced H2S gas sensors and efficient sunlight-driven photocatalysts. The developed hierarchical marigold structures provide effective gas diffusion channels via a well-aligned mesoporous framework, resulting in remarkable enhancement in the sensing response to H2S. The temperature and gas concentration dependence on the sensing properties reveals that Ru loading not only improves the sensing response, but also lowers the operating temperature of the sensor from 275 to 200 °C...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427338/enhanced-cathode-performance-of-a-rgo-v-2-o-5-nanocomposite-catalyst-for-microbial-fuel-cell-applications
#10
Shanmugam Mahalingam, Sivasankaran Ayyaru, Young-Ho Ahn
A reduced graphene oxide-V2O5 nanocomposite was synthesized by a low temperature surfactant free hydrothermal method and its MFC performance was assessed. The structural properties of the synthesized nanocomposite were studied by X-ray diffraction. Field emission scanning electron microscopy of the nanocomposite revealed a wrinkled paper-like structure of rGO and a nanobelt-like structure of V2O5. This study estimated the viability of the graphene-based nanocomposite rGO-V2O5 as a novel cathode catalyst in single chamber air-cathode MFCs...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427005/synthesis-characterization-and-mass-spectrometric-analysis-of-lsn-iv-f-4-x-x-salts-l-tris-1-ethyl-benzoimidazol-2-yl-methyl-amine-x-1-4
#11
Riccardo Suter, Ala'aeddeen Swidan, Harmen S Zijlstra, Charles L B Macdonald, J Scott McIndoe, Neil Burford
A series of complexes with the formulae [(BIMEt3)SnF4-x][OTf]x with x = 1-4 has been synthesized by successive fluoride abstraction from SnF4 with TMSOTf in the presence of the tetradentate nitrogen donor BIMEt3 (tris ((1-ethyl-benzoimidazol-2-yl)methyl)amine). Single crystal X-ray diffraction and heteronuclear NMR spectroscopic analysis provided insight into these new main group cations. Electrospray ionization mass spectrometric analysis on solutions containing the different salts allowed for successful detection of the cations [(BIMEt3)SnF]3+, [(BIMEt3)SnF2]2+ and [(BIMEt3)SnF3]+...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427003/eu-3-tb-3-functionalized-bi-based-metal-organic-frameworks-toward-tunable-white-light-emission-and-fluorescence-sensing-applications
#12
Lifei Xu, Yan Xu, Xianliang Li, Zhuopeng Wang, Ting Sun, Xia Zhang
The rational design strategy to construct lanthanide ion functionalized metal organic frameworks (MOFs) has attracted tremendous attention as they are promising candidates for developing novel luminescence materials and optical sensors owing to their intense, long-lived and tunable luminescence performances. In this work, a series of Eu3+/Tb3+ singly doped or codoped bismuth-based MOFs were prepared under in situ facile solvothermal conditions using BiOBr nanoplates as bismuth resources. A red-green-blue-based trichromatic white-light emission can be finely achieved by modulating the doping ratio of Eu3+/Tb3+ in the blue-emitting Bi-MOF host material and such photoluminescence tuning can also be realized by controlling the excitation wavelength...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427002/the-use-of-a-semi-flexible-bipyrimidyl-ligand-for-the-construction-of-azide-based-coordination-polymers-structural-diversities-and-magnetic-properties
#13
Zu-Zhen Zhang, Gene-Hsiang Lee, Chen-I Yang
Using a semi-flexible quadritopic N-donor ligand, 5,5'-bipyrimidine (bpym), four new azide-based coordination polymers, {[Co2(bpym)(N3)4]·MeCN}n (1), [Co(bpym)(N3)2]n (2), [Mn(bpym)(N3)2]n (3) and {[Ni3(bpym)3(N3)6]·2H2O}n (4) were synthesized and structurally characterized. With bpym aciting as a planar μ4-bridging ligand, the resulting compound, 1, comprised a net-to-net 3D framework composed of two grid-like 44-subnets, Co(EE-N3)2-based and Co2(bpym)-based sheets, with a (4,6)-connected (42·64)(48·66·8)2 topology...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30427000/interplay-between-h-bonding-and-interpenetration-in-an-aqueous-copper-ii-aminoalcohol-pyromellitic-acid-system-self-assembly-synthesis-structural-features-and-catalysis
#14
Tiago A Fernandes, Marina V Kirillova, Vânia André, Alexander M Kirillov
Two new copper(ii) coordination compounds, [Cu(H1.5mdea)2]2(H2pma) (1a) and [{Cu2(μ-Hmdea)2}2(μ4-pma)]n·2nH2O (1b), were self-assembled at different temperatures from the same multicomponent reaction system, comprising copper(ii) nitrate, N-methyldiethanolamine (H2mdea), pyromellitic acid (H4pma), and potassium hydroxide. Products 1a and 1b were isolated as microcrystalline solids and fully characterized and their structures were established by single-crystal X-ray diffraction. Compound 1a features the bis-aminoalcohol(ate) monocopper(ii) units and H2pma2- anions that are multiply interconnected by strong H-bonds into a firm 2D H-bonded layer...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30426999/disorder-induced-polymorphic-transitions-in-the-high-hydrogen-density-compound-sr-bh-4-2-nh-3-bh-3-2
#15
Mathias Jørgensen, Young-Su Lee, Morten Bjerring, Lars H Jepsen, Ümit Akbey, Young Whan Cho, Torben R Jensen
The new compound Sr(BH4)2(NH3BH3)2 has been synthesized and characterized with in situ powder X-ray diffraction and fast (28 or 60 kHz) magic angle spinning 1H, 11B and 15N NMR and structurally optimized with density functional theory calculations. This investigation reveals complex structural rearrangements for this compound as a function of temperature. A room temperature orthorhombic polymorph, α-Sr(BH4)2(NH3BH3)2, with the space group symmetry Pbca, has been determined with a layered structure of alternating ammonia borane and Sr(BH4)2, partially stabilized by dihydrogen bonding...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30426996/ultralight-supercapacitors-utilizing-waste-cotton-pads-for-wearable-energy-storage
#16
Yang Lu, Weixiao Wang, Yange Wang, Menglong Zhao, Jinru Lv, Yan Guo, Yingge Zhang, Rongjie Luo, Xianming Liu
Successful popularization of wearable energy storage devices lies in the exploitation of scalable fabrication technologies that are based on economically viable materials. Herein, we reveal that discarded cotton pads can be used as a cost-efficient substrate for the in situ polymerization of pyrrole and exhibited good mechanical flexibility, lightness, and high conductivity. To extend the applications of the resulting PPy-coated cotton pads (PCPs) to the supercapacitor field, a layer of MnO2 nanosheets was further decorated on the surface of PCPs (PCPs@MnO2) by a simple electrochemical deposition technique...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30426995/two-ce-3-centers-induced-broadband-emission-in-y-3-si-6-n-11-ce-3-yellow-phosphor
#17
Dashuai Sun, Liangliang Zhang, Zhendong Hao, Xia Zhang, Guo-Hui Pan, Huajun Wu, Yongshi Luo, Shuai He, Haifeng Zhao, Jiahua Zhang
The Y3Si6N11:Ce3+ yellow phosphor shows a well-known ∼150 nm broad emission band, exhibiting a potential application in UV or blue based white LEDs. We report the observation of two Ce3+ emitting centers, the superposition of which forms the broad emission band. One center has a green emission band peaked at 539 nm (Ce1) with the first excitation band at 420 nm. The other has a red emission band peaked at 600 nm (Ce2) with the first excitation band at 485 nm. The two Ce3+ centers are assigned to the substitution for two Y sites in Y3Si6N11...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30426993/a-linear-trinuclear-ferrous-single-molecule-magnet
#18
Shihao Liu, Yi-Fei Deng, Chang'An Li, Xiaoyong Chang, Yuan-Zhu Zhang
A linear trinuclear ferrous complex [FeII3(pymp)4(MeOH)2][BPh4]2·2MeOH (1) (Hpymp = 2-[(pyridine-2-ylimine)-methyl]phenol) was isolated and characterized both structurally and magnetically. A magnetic study revealed the ferromagnetic coupling (J = +3.54 cm-1) within the [FeII3] units and uniaxial magnetic anisotropy (D = -1.21 cm-1) of the molecule. Slow relaxation of the magnetization at below 5 K and an effective energy barrier of 26.0(2) cm-1 under a 1200 Oe applied dc field were evidenced. Moreover, clear magnetic hysteresis loops were observed at below 2...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30426131/a-mononuclear-cobalt-complex-for-water-oxidation-new-controversies-and-puzzles
#19
Rasoul Safdari, Mohammad Reza Mohammadi, Małgorzata Hołyńska, Petko Chernev, Holger Dau, Mohammad Mahdi Najafpour
Herein the role of a mononuclear cobalt(iii) complex, [CoIII(DPKOH)2]ClO4 (DPK = di(2-pyridyl)ketone), in the water electrooxidation process is investigated with scanning electron microscopy, energy dispersive spectrometry, X-ray diffraction studies, NMR, chronoamperometry, cyclic voltammetry, extended X-ray absorption fine structure and X-ray absorption near edge structure determination. Our experiments show that, in comparison to the reported literature, other cobalt-containing structures on the surface of the FTO electrode could also be the true catalyst for water oxidation...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/30426128/ag-cu-oxide-nanoparticles-with-high-oxidation-states-towards-new-high-t-c-materials
#20
Maxim Tchaplyguine, Chaofan Zhang, Tomas Andersson, Olle Björneholm
In Ag-Cu oxides possible to fabricate so far, superconductivity has not been detected, but high conductivity was. In the quest for superconductivity the demand is to create a high and peculiar copper-oxygen coordination. Such coordination makes it non-trivial to determine Cu oxidation states, which may be several and co-existing. Another reason for uncertainty is in oxygen deficiency typical for superconducting crystals. Finally, Cu oxidation is influenced by the other metals in the substance. For chemical fabrication the difficulty is to tune the relative abundances of elements in a fine way...
November 14, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
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