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Supramolecular Copolymer from Two-component gel: Metal Ion-Mediated Cross-Linking, Enhanced Viscoelasticity and Supramolecualr Yarn

28-10-2014 | Ling Wang; Yaqing Liu; Zhaocun Shen; Tianyu Wang; Minghua Liu, Chemical Communication, 2014

The hydrogels based on the co-assembly of bolaamphiphilic L-histidine and 2,2’-bipyridine-dicarboxylic acid have been transformed into viscoelastic supramolecular polymers by cross-linking with Cu(II) ions, and macroscopic supramolecular yarns were obtained by direct drawing from the dilute ...

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Reactions of the Donor‐Stabilized Silylene Bis[N,N′‐diisopropyl‐benzamidinato(−)]silicon(II) with Brønsted Acids

24-10-2014 | Konstantin Junold, Katharina Sinner, Johannes A. Baus, Christian Burschka, Célia Fonseca Guerra, F. Matthias Bickelh ..., Chemistry - A European Journal, 2014

Abstract Reaction of the donor‐stabilized silylene 1 (which is three‐coordinate in the solid state and four‐coordinate in solution) with [HMCp(CO)3] (M=Mo, W; Cp=cyclopentadienyl) leads to the cationic five‐coordinate silicon(IV) complexes 2 and 3, respectively, and reaction of 1 with CH3COOH ...

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Self‐assembly micelles from novel tri‐armed star C3‐(PS‐b‐PNIPAM block copolymers for anticancer drug release

23-10-2014 | Feng Xu, Jing‐Wen Xu, Bi‐Xia Zhang, Yan‐Ling Luo, AIChE Journal, 2014

Abstract Novel tri‐armed star polystyrene‐block‐poly(N‐isopropylacrylamide) block copolymers with trimesic acid as central molecules were synthesized by successive two‐step ATRP, and confirmed by FT‐IR, 1H NMR, and laser light scattering gel chromatography system. The copolymers could ...

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Protonation of a Biologically Relevant CuII μ‐Thiolate Complex: Ligand Dissociation or Formation of a Protonated CuI Disulfide Species?

22-10-2014 | Erica C. M. Ording‐Wenker, Martijn van der Plas, Maxime A. Siegler, Célia Fonseca Guerra, Elisabeth Bouwman, Chemistry - A European Journal, 2014

Abstract The proton‐induced electron‐transfer reaction of a CuII μ‐thiolate complex to a CuI‐containing species has been investigated, both experimentally and computationally. The CuII μ‐thiolate complex [CuII2(LMeS)2]2+ is isolated with the new pyridyl‐containing ligand LMeSSLMe, which can ...

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Using controlled radical polymerization to confirm the lower critical solution temperature of an N‐(alkoxyalkyl) acrylamide polymer in aqueous solution

21-10-2014 | Xeniya Savelyeva, Lucia Li, Milan Marić, Journal of Polymer Science Part A: Polymer Chemistry, 2014

ABSTRACT N‐(3‐Methoxypropyl) acrylamide (MPAM) was polymerized by controlled radical polymerization (CRP) methods such as nitroxide‐mediated polymerization (NMP) and reversible addition–fragmentation chain‐transfer polymerization (RAFT). CRP was expected to yield well‐defined polymers with ...

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Synthesis and characterization of tributyltin derivatives from 4‐oxo‐4‐(arylamino)butanoic acids and their in vitro biological activity against cervical cancer cell lines

20-10-2014 | Irma Rojas‐Oviedo, Carlos Camacho‐Camacho, Luis Sánchez‐Sánchez, Jorge Cárdenas, Hugo López‐Muñoz, Hugo Eugenio‐Robl ..., Applied Organometallic Chemistry, 2014

Uterine (cervix and corpus) cancer is one of the major causes of mortality in women in Mexico. Organotin carboxylated derivatives have shown high cytotoxic activity against various cell lines of human origin. We describe the synthesis of three new tri‐n‐butyltin derivatives from ...

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Surface-Based Supramolecular Chemistry Using Hydrogen Bonds

20-10-2014 | Anna G. Slater; Luis M. A. Perdigão; Peter H. Beton; Neil R. Champness, Accounts of Chemical Research, 2014

ConspectusThe arrangement of molecular species into extended structures remains the focus of much current chemical science. The organization of molecules on surfaces using intermolecular interactions has been studied to a lesser degree than solution or solid-state systems, and unanticipated ...

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Preparation and evaluation of nonphosphate terpolymer as scale inhibitor and dispersant for Ca3(PO4)2, BaSO4, and Iron (III) hydroxide scales

18-10-2014 | Yunyun Bu, Yuming Zhou, Qingzhao Yao, Yiyi Chen, Wei Sun, Wendao Wu, Journal of Applied Polymer Science, 2014

ABSTRACT The polymeric scale inhibition and dispersion agents (PAYS) were prepared by graft copolymerization of acrylic acid, allylpolyethoxy carboxylate (APEY) and 2‐acrylamido‐2‐methyl‐propanesulfonic acid by using ammonium persulfate as a radical initiator in aqueous solution, among which ...

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The reactivity of N,C,N-intramolecularly coordinated antimony(III) and bismuth(III) oxides with the sterically encumbered organoboronic acid 2,6-i-Pr2C6H3B(OH)2

17-10-2014 | Author(s): Monika Kořenková , Milan Erben , Roman Jambor , Aleš Růžička , Libor Dostál, Journal of Organometallic Chemistry, 2014

Publication date: 1 December 2014 Source:Journal of Organometallic Chemistry, Volumes 772–773 Author(s): Monika Kořenková , Milan Erben , Roman Jambor , Aleš Růžička , Libor Dostál The reactivity of N,C,N-intramolecularly coordinated antimony(III) and bismuth(III) oxides (LMO)2 [where ...

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Sensitive and selective colorimetric detection of Cu2+ in aqueous medium via aggregation of thiomalic acid functionalized Ag nanoparticles

14-10-2014 | Vairaperumal Tharmaraj; Jyisy Yang, Analyst, 2014

A simple and effective colorimetric method for determination of copper ion was developed in this work. In this method, thiomalic acid functionalized silver nanoparticles (TMA-AgNPs) were prepared and the changes of solution color, which induced by the aggregation of TMA-AgNPs in the presence of ...

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