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Diastereoselective desymmetrization of diarylphosphinous acid-borane amides under Birch reduction

06-Jan-2015 | Marek Stankevič, Organic & Biomolecular Chemistry, 2015

Treatment of diarylphosphinous acid-borane amides possessing chiral amido functionality with an alkali metal solution in liquid ammonia induced a preferential dearomatization of one aryl substituent at phosphorus leading to the formation of non-equimolar amounts of diastereomers. ...

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Interpenetrated and non-interpenetrated homochiral metal-organic frameworks based on (R)-2,2[prime or minute]-dihydroxy-1,1[prime or minute]-binaphthyl-5,5[prime or minute]-dibenzoic acid

06-Jan-2015 | K. Tanaka; D. Yanamoto; K. Yoshimura; T. Anami; Z. Urbanczyk-Lipkowska, CrystEngComm, 2015

A new example of interpenetration that is simply controlled by modifying hydroxyl function in homochiral MOFs is reported. Interpenetrated and non-interpenetrated chiral metal–organic frameworks (MOF-1 and MOF-2) were prepared by solvothermal reactions of [Cu(NO3)2]·3H2O in N,N-dimethylformamide ...

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Effective synthesis of novel O-acetylated compounds over ZrO2-Al2O3 solid acid

04-Jan-2015 | Author(s): N. Thimmaraju , S.Z. Mohamed Shamshuddin , S.R. Pratap , K. Shyam Prasad, Arabian Journal of Chemistry, 2015

Publication date: Available online 3 January 2015 Source:Arabian Journal of Chemistry Author(s): N. Thimmaraju , S.Z. Mohamed Shamshuddin , S.R. Pratap , K. Shyam Prasad The solid acids such as Al2O3, ZrO2 and ZrO2-Al2O3 containing different ZrO2 loadings (10-100 mol%) were prepared by ...

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Extending the photoelectrocatalytic detection range of KHP by eliminating self-inhibition at TiO2 nanoparticle electrodes

04-Jan-2015 | Author(s): Yanhe Han , Qi Cheng , Jiaqing Chen , Cuihong Zhou , Haimin Zhang , Shanqing Zhang , Huijun Zhao, Journal of Electroanalytical Chemistry, 2015

Publication date: 1 February 2015 Source:Journal of Electroanalytical Chemistry, Volume 738 Author(s): Yanhe Han , Qi Cheng , Jiaqing Chen , Cuihong Zhou , Haimin Zhang , Shanqing Zhang , Huijun Zhao The photoelectrocatalytic oxidation of potassium hydrogen phthalate (KHP) at a ...

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Investigating Protein Folding and Unfolding in Electrospray Nanodrops Upon Rapid Mixing Using Theta-Glass Emitters

31-Dec-2014 | Daniel N. Mortensen; Evan R. Williams, Analytical Chemistry, 2014

Theta-glass emitters are used to rapidly mix two solutions to induce either protein folding or unfolding during nanoelectrospray (nanoESI). Mixing acid-denatured myoglobin with an aqueous ammonium acetate solution to increase solution pH results in protein folding during nanoESI. A reaction time ...

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Synthesis and application of ethylenediamine tetrapropionic salt as a novel draw solute for forward osmosis application

30-Dec-2014 | Qingwu Long, Guangxian Qi, Yan Wang, AIChE Journal, 2014

Abstract The development of suitable draw solutes for forward osmosis (FO) process is a big obstacle on the way of its real industrialization. In this work, a novel draw solute, ethylenediamine tetrapropionic (EDTP) acid (salt) is developed for FO application. The successful synthesis is ...

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Fabrication of thermoresponsive, core‐crosslinked micelles based on poly[N‐isopropyl acrylamide‐co‐3‐(trimethoxysilyl)propylmethacrylate]‐b‐poly{N‐[3‐(dimethylamino)propyl]methacrylamide} for the codelivery of doxorubicin and nucleic acid

30-Dec-2014 | Cong Chang, Hong Dan, Li‐Ping Zhang, Ming‐Xiang Chang, Yin‐Feng Sheng, Guo‐Hua Zheng, Xian‐Zheng Zhang, Journal of Applied Polymer Science, 2014

ABSTRACT Thermoresponsive amphiphilic copolymer, poly[N‐isopropyl acrylamide‐co‐3‐(trimethoxysilyl)propylmethacrylate]‐b‐poly{N‐[3‐(dimethylamino)propyl]methacrylamide} with a branched structure was designed and synthesized by consecutive reversible addition–fragmentation chain‐transfer ...

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Effect of additives on the melt rheology and thermal degradation of poly[(R)‐3‐hydroxybutyric acid]

30-Dec-2014 | Carlos R. Arza, Patric Jannasch, Peter Johansson, Per Magnusson, Alan Werker, Frans H. J. Maurer, Journal of Applied Polymer Science, 2014

ABSTRACT Thermal degradation of poly[(R)−3‐hydroxybutyric acid] (PHB) during melt mixing results in random chain scission that produces shorter polymer chains containing crotonic and carboxyl end groups. One way of preventing this serious reduction of molar mass is to add agents that react ...

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The peculiar behavior of Picha in the formation of metallacrown complexes with Cu(II), Ni(II) and Zn(II) in aqueous solution

30-Dec-2014 | Luciano Marchiò; Nicola Marchetti; Corrado Atzeri; Valentina Borghesani; Maurizio Remelli; Matteo Tegoni, Dalton Transactions, 2014

The thermodynamic stability of the metallacrown complexes formed by picolinehydroxamic acid (Picha) with Cu(II), Ni(II) and Zn(II) in aqueous solution has been determined by potentiometry, and the speciation models validated by ESI-MS and UV-visible spectrophotometry. Cu(II) and Zn(II) form ...

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Aggregation behavior of a gemini surfactant with a tripeptide spacer

30-Dec-2014 | Meina Wang; Yuchun Han; Fulin Qiao; Yilin Wang, Soft Matter, 2014

A peptide gemini surfactant 12-G(NH2)LG(NH2)-12 has been constructed with two dodecyl chains separately attached to the two terminals of a glutamic acid-lysine-glutamic acid peptide and the aggregation behavior of the surfactant was studied in aqueous solution. The 12-G(NH2)LG(NH2)-12 molecules ...

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