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Studying the concentration dependence of the aggregation number of a micellar model system by SANS

07-May-2015 | Matthias Amann; Lutz Willner; Jörg Stellbrink; Aurel Radulescu; Dieter Richter, Soft Matter, 2015

We present a small-angle neutron scattering (SANS) structural characterization of n-alkyl-PEO polymer micelles in aqueous solution with special focus on the dependence of the micellar aggregation number on increasing concentration. The single micellar properties in the dilute region up to the ...


The synthesis and characterisation of coordination and hydrogen-bonded networks based on 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoic acid

07-May-2015 | Macguire R. Bryant; Andrew D. Burrows; Christopher M. Fitchett; Chris S. Hawes; Sally O. Hunter; Luke L. Keenan; Dav ..., Dalton Transactions, 2015

The synthesis, structural and thermal characterisation of a number of coordination complexes featuring the N,O-heteroditopic ligand 4-(3,5-dimethyl-1H-pyrazol-4-yl)benzoate, HL are reported. The reaction of H2L with cobalt(ii) and nickel(ii) nitrates at room temperature in basic DMF/H2O solution ...


Electrochemistry at highly oriented pyrolytic graphite (HOPG): lower limit for the kinetics of outer-sphere redox processes and general implications for electron transfer models

07-May-2015 | Guohui Zhang; Anatolii S. Cuharuc; Aleix G. Güell; Patrick R. Unwin, Physical Chemistry Chemical Physics, 2015

The electron transfer (ET) kinetics of three redox couples in aqueous solution, IrCl62−/3−, Ru(NH3)63+/2+ and Fe(CN)64−/3−, on different grades of highly oriented pyrolytic graphite (HOPG) have been investigated in a droplet-cell setup. This simple configuration allows measurements to be made on ...


Time-Resolved IR Spectroscopy of a Trinuclear Palladium Complex in Solution

07-May-2015 | Markus Gerhards; Rolf Diller; Wim Klopper; Frank Breher; Manuel Zimmer; Fabian Rupp; Patrick Singer; Florian Walz, Physical Chemistry Chemical Physics, 2015

This paper presents a combined spectroscopic and theoretical analysis of a trinuclear [Pd3{Si(mtMe)3}2] complex (mtMe = methimazole) which has been demonstrated to be a potential catalyst for coupling reactions. It is a highly symmetric model system (D3 in the electronic ground state) for the ...


Controlled self-assembly of a pyrene-based bolaamphiphile by acetate ions: from nanodisks to nanofibers by fluorescence enhancement

07-May-2015 | Shouchun Yin; Lin Dong; Yijun Xia; Bin Dong; Xingxing He; Dong Chen; Huayu Qiu; Bo Song, Soft Matter, 2015

In this paper, a pyrene moiety is incorporated into a bolaamphiphile to form a novel molecule denoted PRB. Above the critical micelle concentration, PRB forms nanodisks in the aqueous solution. The addition of acetate ions induces a morphological change in self-assembled aggregates, which convert ...


The Role of Ammonia Oxide in the Reaction of Hydroxylamine with Carboxylic Esters

07-May-2015 | Carlos M. Silva; Isabela Cristina Dias; Josefredo Pliego, Organic & Biomolecular Chemistry, 2015

Theoretical calculations indicates that hydroxylamine can exist in the both neutral and zwitterionic (ammonia oxide) forms in aqueous solution, the former being 3.5 kcal mol-1 more stable. In this report, we have studied the reaction mechanism of hydroxylamine with phenyl acetate and analyzed the ...


Fluorinated graphene dielectric films obtained from functionalized graphene suspension: preparation and properties

07-May-2015 | N. A. Nebogatikova; I. V. Antonova; V. Ya. Prinz; I. I. Kurkina; V. I. Vdovin; G. N. Aleksandrov; V. B. Timofeev; S. ..., Physical Chemistry Chemical Physics, 2015

In the present study, we have examined the interaction between a suspension of graphene in dimethylformamide and an aqueous solution of hydrofluoric acid, which was found to result in partial fluorination of suspension flakes. A considerable decrease in the thickness and lateral size of the ...


Non-volatile resistive memory devices based on solution-processed ultrathin two-dimensional nanomaterials

07-May-2015 | Chaoliang Tan; Zhengdong Liu; Wei Huang; Hua Zhang, Chemical Society Reviews, 2015

Ultrathin two-dimensional (2D) nanomaterials, such as graphene and MoS2, hold great promise for electronics and optoelectronics due to their distinctive physical and electronic properties. Recent progress in high-yield, massive production of ultrathin 2D nanomaterials via various solution-based ...


Synthesis of Nanorod-FeP@C Composites with Hysteresis Lithiation in Lithium-ion Battery

06-May-2015 | Jun Jiang; Chunde Wang; Jianwen Liang; Jian Zuo; Qing Yang, Dalton Transactions, 2015

Nanorod-FeP@C composites are synthesized via a one-pot solution reaction of ferrocene (Fe(C5H5)2) with excess triphenylphosphine (PPh3) in the sealed vacuum tubes at 390 °C, in which PPh3 is used as both phosphorus source and solvent in the reaction. The structure and lithium storage performance ...


Towards an understanding of the nucleation of alpha-para amino benzoic acid from ethanolic solutions: a multi-scale approach

06-May-2015 | D. Toroz; I. Rosbottom; T. D. Turner; D. M. C. Corzo; R. B. Hammond; X. Lai; K. J. Roberts, Faraday Discussions, 2015

The molecular assembly and subsequent nucleation of para-amino benzoic acid (PABA) from ethanolic solutions is probed using a multi-scale and multi-technique approach. This is applied by examining and interrelating information regarding the molecular, solution-state, cluster, solid-state and ...


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