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Hydrogen peroxide concentration by pervaporation of a ternary liquid solution in microfluidics

26-11-2014 | Iwona Ziemecka; Benoît Haut; Benoit Scheid, Lab on a Chip, 2014

Pervaporation in a microfluidic device is performed on liquid ternary solutions of hydrogen peroxide–water–methanol in order to concentrate hydrogen peroxide (H2O2) by removing methanol. The quantitative analysis of the pervaporation of solutions with different initial compositions is performed, ...


Highly Porous Materials as Tunable Electrocatalysts for the Hydrogen and Oxygen Evolution Reaction

22-11-2014 | Marc Ledendecker, Guylhaine Clavel, Markus Antonietti, Menny Shalom, Advanced Functional Materials, 2014

The facile preparation of highly porous, manganese doped, sponge‐like nickel materials by salt melt synthesis embedded into nitrogen doped carbon for electrocatalytic applications is shown. The incorporation of manganese into the porous structure enhances the nickel catalyst's activity for the ...


An ab initio molecular dynamics study of the hydrogen bonded structure, dynamics and vibrational spectral diffusion of water in the ion hydration shell of a superoxide ion

21-11-2014 | Author(s): Jyoti Roy Choudhuri , Amalendu Chandra, Chemical Physics, 2014

Publication date: 5 December 2014 Source:Chemical Physics, Volume 445 Author(s): Jyoti Roy Choudhuri , Amalendu Chandra We present a first principles simulation study of vibrational spectral diffusion and hydrogen bond dynamics in aqueous solution of a superoxide ion. It is found that the ...


Emission Properties of Oxyluciferin and Its Derivatives in Water: Revealing the Nature of the Emissive Species in Firefly Bioluminescence

18-11-2014 | Avisek Ghose; Mateusz Rebarz; Oleg V. Maltsev; Lukas Hintermann; Cyril Ruckebusch; Eduard Fron; Johan Hofkens; Yves ..., Journal of Physical Chemistry B, 2014

The first systematic steady-state and time-resolved emission study of firefly oxyluciferin (emitter in firefly bioluminescence) and its analogues in aqueous buffers provided the individual emission spectra of all chemical forms of the emitter and the excited-state equilibrium constants in ...


Reactive Molecular Dynamics Study of the pH-Dependent Dynamic Structure of α-Helix

17-11-2014 | M. Golkaram; Y. K. Shin; A. C. T. van Duin, Journal of Physical Chemistry B, 2014

We have studied the α-helix to random coil transition using ReaxFF reactive molecular dynamics as a function of pH. Urea binding to peptides and associated interference with backbone H-bonds and charged side chains interactions, which can both denature the helices, have been studied previously ...


Syntheses of Enantiopure Bifunctional 2-Guanidinobenzimidazole Cyclopentadienyl Ruthenium Complexes: Highly Enantioselective Organometallic Hydrogen Bond Donor Catalysts for Carbon–Carbon Bond Forming Reactions

17-11-2014 | Tathagata Mukherjee; Carola Ganzmann; Nattamai Bhuvanesh; John A. Gladysz, Organometallics, 2014

2-Guanidinobenzimidazole (GBI) derivatives with a NHR group in place of NH2 (R: a, CH2Ph; b, (SC)-CH(CH3)Ph; c, (RCRC)-CH(CH2)4CHNMe2; d, (RCRC)-CH(CH2)4CH-NCH2(CH2)3CH2) are prepared in four steps from 2-aminobenzimidazole. Reactions with [(η5-C5H5)Ru(CO)(NCCH3)2]+PF6– (5+PF6–) afford the ...


Reactivity of the Chiral Metallic Brønsted Acid [(η6-p-MeC6H4iPr)Ru(κ3P,O,O′-POH)][SbF6]2 (POH = (SC1,RC2)-Ph2PC(Ph)HC(OH)HCH2OMe) toward Aldimines

17-11-2014 | Pilar Pardo; Daniel Carmona; Pilar Lamata; Ricardo Rodrı́guez; Fernando J. Lahoz; Pilar Garcı́a-Orduña; Luis A. Oro, Organometallics, 2014

Dichloromethane solutions of complex 1 catalyze both the aza-Diels–Alder (ADA) reaction of aldimines with cyclopentadiene and the aza-Friedel–Crafts (AFC) reaction between aldimines and indoles. Racemic adducts were obtained in both cases. NMR measurements of mixtures of the aldimine ...


Controlled Linker Dependence of Solution‐ and Solid‐State Emission of Vaulted trans‐Bis(salicylaldiminato)platinum(II) Complexes with Amino Functionalities

12-11-2014 | Naruyoshi Komiya, Minoru Okada, Makoto Hoshino, Ngoc Ha‐Thu Le, Takeshi Naota, European Journal of Inorganic Chemistry, 2014

Abstract The synthesis, structures, and emission properties of vaulted trans‐bis(salicylaldiminato)platinum(II) complexes 1 with diethylamino functionalities are described and compared with the non‐substituted analogues. The amino substitution provides an improvement of the linker dependence ...


Solution Synthesis of Metal Silicide Nanoparticles

12-11-2014 | Joshua M. McEnaney; Raymond E. Schaak, Inorganic Chemistry, 2014

Transition-metal silicides are part of an important family of intermetallic compounds, but the high-temperature reactions that are generally required to synthesize them preclude the formation of colloidal nanoparticles. Here, we show that palladium, copper, and nickel nanoparticles react with ...


Effects of Anions on the Electrodeposition of Cobalt on Pt(111) Electrode

12-11-2014 | Yenchung Kuo; Weicheng Liao; ShuehLin Yau, Langmuir, 2014

Voltammetry and in-situ scanning tunneling microscopy (STM) were used to examine electrodeposition of cobalt (Co) on a stationary Pt(111) electrode in 0.1 M K2SO4 + 1 mM H2SO4 + 10 mM CoSO4 (or the sulfate solution) without and with 10 mM chloride (the chloride solution). Under- and overpotential ...


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