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Alkyl linker effects on the coordination topology of ditopic di(2-pyridylmethyl)amine carboxylate ligands with ZnII and CuII perchlorates: polymers vs macrocycles

26-Mar-2015 | Kiattipoom Rodpun; Allan G. Blackman; Michael G. Gardiner; Eng Wui Tan; Carla J. Meledandri; Nigel T. Lucas, CrystEngComm, 2015

A series of ditopic ω-di(2-pyridylmethyl)amine carboxylic acid ligands incorporating a range of n-alkyl linkers (CnCOOH, n = 3–5, 7, 10 and 11) have been synthesised. Solution phase studies showed a 1 [ ] : [ ] 1 coordination stoichiometry between the ligands and M(ClO4)2·6H2O (M = ZnII or CuII) ...

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One‐ and two‐dimensional polymers from proline and calcium bromide

19-Mar-2015 | Kevin Lamberts, Mihaela‐Diana Şerb, Ulli Englert, Acta Crystallographica Section C, 2015

Reactions of calcium bromide with enantiopure and racemic proline in aqueous solution lead to two solids in which the zwitterionic amino acid acts as a bridging ligand between neighbouring cations. Depending on the chirality of the amino acid, topologically very different products are obtained. ...

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Alkaline‐Earth Metal Cations as Structure Building Blocks for Molecular Cages with Entrapment and Controlled Release of Quintuple Ionic Aggregates

18-Mar-2015 | Chi‐Tsang Wang, Ler‐Chun Shiu, Kom‐Bei Shiu, Chemistry - A European Journal, 2015

Abstract Currently, main‐group metal cations are totally neglected as the structure‐building blocks for the self‐assembly of supramolecular coordination metallocages due to the lack of directional bonding. However, here we show that a common Arrhenius acid–base neutralization allows the ...

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Electrochemical characterization of a responsive macromolecular interface on gold

13-Mar-2015 | Artur Fandrich, Jens Buller, Daniel Schäfer, Erik Wischerhoff, André Laschewsky, Fred Lisdat, physica status solidi (a), 2015

This study reports on the investigation of a thermo­responsive polymer as a thin film on electrodes and the influence of coupling a peptide and an antibody to the film. The utilized polymer from the class of poly(oligoethylene glycol)‐methacrylate polymers (poly(OEGMA)) with carboxy functions ...

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Allosterically Controlled Threading of Polymers through Macrocyclic Dimers

12-Mar-2015 | Seda Cantekin; Albert J. Markvoort; Johannes A. A. W. Elemans; Alan E. Rowan; Roeland J. M. Nolte, Journal of the American Chemical Society, 2015

As part of an ongoing study to construct a molecular Turing machine in which a polymer chain is encoded via allosteric information transfer between macrocyclic complexes, we describe the thermodynamic and kinetic characterization of a multicomponent self-assembled system based on a zinc porphyrin ...

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Synthesis of Novel Hyper‐Branched Polymers From Trimethoxysilyl‐Terminated Polylactides and Their Utilization for Modification of Poly(l‐Lactide) Materials

11-Mar-2015 | Jungyub Hyun, Chan Woo Lee, Yoshiharu Kimura, Macromolecular Materials and Engineering, 2015

Silyl‐terminated oligomers of poly(l‐lactide) (mSi‐PLLA) and poly(d‐lactide) (mSi‐PDLA) were synthesized by hydrosilylation of allyl‐terminated derivatives. They were readily hydrolyzed into hyper‐branched polymers having particulate morphology. When a mSi‐PDLA oligomer was blended with a PLLA ...

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Comb‐Like Graft Copolymers of Poly(oxa)norbornene: Efficient Synthesis Using a Combination of ROMP and Click Chemistry

10-Mar-2015 | Ahmed M. Eissa, Ezat Khosravi, Macromolecular Chemistry and Physics, 2015

The combination of ring‐opening metathesis polymerization (ROMP) and copper‐catalyzed azide–alkyne cycloaddition (CuAAC) is described as an efficient click reaction to synthesize a new range of well‐defined comb‐like polynorbornene/polyoxanorbornene graft copolymers containing poly(ethylene ...

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Dimeric Drug Polymeric Nanoparticles with Exceptionally High Drug Loading and Quantitative Loading Efficiency

10-Mar-2015 | Kaimin Cai; Xi He; Ziyuan Song; Qian Yin; Yanfeng Zhang; Fatih M. Uckun; Chen Jiang; Jianjun Cheng, Journal of the American Chemical Society, 2015

Encapsulation of small-molecule drugs in hydrophobic polymers or amphiphilic copolymers has been extensively used for preparing polymeric nanoparticles (NPs). The loadings and loading efficiencies of a wide range of drugs in polymeric NPs, however, tend to be very low. In this Communication, we ...

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Improved Electrical Performance of Poly(3‐hexylthiophene) Induced by Stable Doping with Polymer Dopants

09-Mar-2015 | Jiayue Chen, Zhaobin Chen, Dalei Yang, Feng Ye, Sisi Wang, Xiaoniu Yang, Macromolecular Chemistry and Physics, 2015

A series of brominated polystyrenes (BPSs) are readily synthesized and blended as polymer dopants with the p‐type semiconducting polymer, poly(3‐hexylthiophene) (P3HT), to improve theirelectrical performance. The obtained P3HT/BPS blend films exhibit increased carrier concentration resulting ...

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Functionalized Polyelectrolytes Assembling on Nano‐BioFETs for Biosensing Applications

04-Mar-2015 | Xuexin Duan, Luye Mu, Sonya D. Sawtelle, Nitin K. Rajan, Ziyu Han, Yanyan Wang, Hemi Qu, Mark A. Reed, Advanced Functional Materials, 2015

A new surface functionalization scheme for nano‐Bio field effect transistors (FETs) using biocompatible polyelectrolyte thin films (PET) is developed. PET assemblies on Si nanowires (Si‐NWs) are driven by electrostatic interactions between the positively charged polymer backbone and negatively ...

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