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Direct Arylation Polycondensation of Bithiazole Derivatives with Various Acceptors

24-10-2014 | Masahiro Kuramochi; Junpei Kuwabara; Wei Lu; Takaki Kanbara, Macromolecules, 2014

Novel π-conjugated polymers with a bithiazole unit and various acceptor units were synthesized by polycondensation via Pd-catalyzed direct arylation. The results of polycondensation reactions depend on chalcogen elements in the monomers. The presence of a Se atom inhibited polymerization, ...

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Flame atomic absorption spectrometry determination of trace amount of gold after separation and preconcentration onto ion-exchange polyethylenimine coated on Al2O3

21-10-2014 | Author(s): Daryoush Afzali , Zahra Daliri , Mohammad Ali Taher, Arabian Journal of Chemistry, 2014

Publication date: November 2014 Source:Arabian Journal of Chemistry, Volume 7, Issue 5 Author(s): Daryoush Afzali , Zahra Daliri , Mohammad Ali Taher The object of this work is to develop a simple and selective method for efficient extraction of Au(III) ions in aqueous solution using a ...

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Using solution- and solid-state S K-edge X-ray absorption spectroscopy with density functional theory to evaluate M–S bonding for MS42− (M = Cr, Mo, W) dianions

21-10-2014 | Angela C. Olson; Jason M. Keith; Enrique R. Batista; Kevin S. Boland; Scott R. Daly; Stosh A. Kozimor; Molly M. MacI ..., Dalton Transactions, 2014

Herein, we have evaluated relative changes in M–S electronic structure and orbital mixing in Group 6 MS42− dianions using solid- and solution-phase S K-edge X-ray absorption spectroscopy (XAS; M = Mo, W), as well as density functional theory (DFT; M = Cr, Mo, W) and time-dependent density ...

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Population-Controlled Impulsive Vibrational Spectroscopy: Background- and Baseline-Free Raman Spectroscopy of Excited Electronic States

21-10-2014 | Torsten Wende; Matz Liebel; Christoph Schnedermann; Robert J. Pethick; Philipp Kukura, Journal of Physical Chemistry A, 2014

We have developed the technique of population-controlled impulsive vibrational spectroscopy (PC-IVS) aimed at providing high-quality, background-free Raman spectra of excited electronic states and their dynamics. Our approach consists of a modified transient absorption experiment using an ...

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Real-Time UV-Visible Spectroscopy Analysis of Purple Membrane-Polyacrylamide Film Formation Taking into Account Fano Line Shapes and Scattering

17-10-2014 | María Gomariz et al., PLoS ONE, 2014

by María Gomariz, Salvador Blaya, Pablo Acebal, Luis Carretero We theoretically and experimentally analyze the formation of thick Purple Membrane (PM) polyacrylamide (PA) films by means of optical spectroscopy by considering the absorption of bacteriorhodopsin and scattering. We have applied ...

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Interaction between Metal Cation and Unnatural Peptide Backbone Mediated by Polarized Water Molecules: Study of Infrared Spectroscopy and Computations

15-10-2014 | Jipei Shi; Jianping Wang, Journal of Physical Chemistry B, 2014

In this work, the interaction between metal cation and a model β-peptide N-ethylpropionamide (NEPA) in aqueous solution is investigated using infrared absorption spectroscopy. Monovalent (Na+), divalent (Ca2+, Mg2+), and trivalent (Al3+) metal cations added to NEPA/water solution at moderate ...

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Development of a thermodynamic identification tool for CO2 capture by chemical absorption

15-10-2014 | Anthony Biget, Thibaut Neveux, Jean‐Pierre Corriou, Yann Le Moullec, The Canadian Journal of Chemical Engineering, 2014

Abstract The extended UNIQUAC model has been used for the representation of the thermodynamic behaviour of CO2 absorption in aqueous amine solutions. Based on available experimental data, an identification methodology has been developed to fit the extended‐UNIQUAC model parameters. In the ...

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Natural α-Amino Acid-Functionalized Poly(phenyleneethynylene)s (PPEs): Synthesis and Chiroptical Characterization of Aggregate States

14-10-2014 | Claudio Resta; Gennaro Pescitelli; Lorenzo Di Bari, Macromolecules, 2014

The synthesis of several novel poly(phenyleneethynylene)s (PPEs) functionalized with different natural α-amino acids methyl esters has been achieved through Cassar–Heck–Sonogashira reaction. Five different derivatives have been prepared varying the nature of the amino acid (Gly, Leu, N-methyl ...

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Syntheses, characterization, and electrochemistry of compounds containing 1-diphenylphosphino-1′-(di-tert-butylphosphino)ferrocene (dppdtbpf)

13-10-2014 | Author(s): Manoj Trivedi , Sanjeev Kumar Ujjain , Gurmeet Singh , Abhinav Kumar , Santosh Kumar Dubey , Nigam P ..., Journal of Organometallic Chemistry, 2014

Publication date: 1 December 2014 Source:Journal of Organometallic Chemistry, Volumes 772–773 Author(s): Manoj Trivedi , Sanjeev Kumar Ujjain , Gurmeet Singh , Abhinav Kumar , Santosh Kumar Dubey , Nigam P. Rath The reaction of copper(I) salts CuX (X=Cl, Br, I, CN, SCN), ...

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An electrochemical sensor based on polyelectrolyte-functionalized graphene for detection of 4-nitrophenol

12-10-2014 | Author(s): Dan Peng , Jingxuan Zhang , Dongong Qin , Jing Chen , Duoliang Shan , Xiaoquan Lu, Journal of Electroanalytical Chemistry, 2014

Publication date: Available online 2 October 2014 Source:Journal of Electroanalytical Chemistry Author(s): Dan Peng , Jingxuan Zhang , Dongong Qin , Jing Chen , Duoliang Shan , Xiaoquan Lu A novel electrochemical sensor based on poly(diallyldimethylammonium chloride) (PDDA) ...

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