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Near‐IR Phosphorescent Ruthenium(II) and Iridium(III) Perylene Bisimide Metal Complexes

12-12-2014 | Marcus Schulze, Andreas Steffen, Frank Würthner, Angewandte Chemie International Edition, 2014

Abstract The phosphorescence emission of perylene bisimide derivatives has been rarely reported. Two novel ruthenium(II) and iridium(III) complexes of an azabenz‐annulated perylene bisimide (ab‐PBI), [Ru(bpy)2(ab‐PBI)][PF6]2 1 and [Cp*Ir(ab‐PBI)Cl]PF6 2 are now presented that both show NIR ...

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Effect of operating conditions on size and morphology of amylose nanoparticles prepared by precipitation

12-12-2014 | Yan Dong, Yanjiao Chang, Qian Wang, Jin Tong, Jiang Zhou, Starch - Stärke, 2014

Nano‐sized amylose particles were prepared by precipitating amylose solution (using DMSO/water mixture as solvent) with absolute ethanol. Effects of operating conditions, including temperature and solvent composition for preparing amylose solution, amylose concentration, ethanol amount used for ...

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Design, Synthesis and Characterization of Coordination Polymer from [Cu(DMF)4(SCN)2] as a Precursor

12-12-2014 | Xiaotong Liu, Feng Zhou, Qiuxuan Zhou, Lihua Wang, Yong Zhang, Qingfeng Xu, Jianmei Lu, Chinese Journal of Chemistry, 2014

Abstract This paper is focused on investigation of coordination polymers constructed by Cu(II) and rigid pyridyl ligands, such as 4,4′‐bipyridyl‐1,2,4‐triazole (Hpytz) and 1,10‐phenanthroline (phen) from a mononuclear precursor [Cu(DMF)4(NCS)2] (1). As expected, the complex was self‐assembled ...

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Polypropylene membranes with the double sensitivity effect

12-12-2014 | Joanna Wolska, Katarzyna Smolinska‐Kempisty, Marek Bryjak, Wojciech Kujawski, Journal of Applied Polymer Science, 2014

ABSTRACT This article describes the modification of polypropylene membranes leading to the preparation of thermo‐ and pH‐sensitive structures. Poly(N‐isopropylacrylamide), poly(acrylic acid), or copolymer poly(N‐isopropylacrylamide‐co‐acrylic acid) was grafted on to the membranes' surface ...

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Influence of Attachment Strategy on the Thermal Stability of Hybridized DNA on Gold Surfaces

12-12-2014 | Tyler J. Petty; Caleb E. Wagner; Aric Opdahl, Langmuir, 2014

The thermal stabilities of double-stranded DNA hybrids immobilized on gold surfaces are shown to be significantly affected by the conformation of the hybrid. To analyze this behavior, DNA probes were immobilized using attachment strategies where the nucleotides within the strand had varying ...

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Two in One: Luminescence Imaging and 730 nm Continuous Wave Laser Driven Photodynamic Therapy of Iridium Complexes

12-12-2014 | Fengfeng Xue; Yang Lu; Zhiguo Zhou; Min Shi; Yuping Yan; Hong Yang; Shiping Yang, Organometallics, 2014

A phosphorescent cationic iridium complex (1) with a donor−π-donor type unit as a N∧N ligand and 2-phenylpyridine as a C∧N ligand was synthesized and characterized. 1 exhibits an intense absorption peak centered at ∼450 nm with a large molar extinction coefficient (ε) of ∼2.4 × 104 M–1 cm–1 and ...

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Sustainability, Vol. 6, Pages 9231-9243: Empirical Evaluation of the Effect of Heat Gain from Fiber Optic Daylighting System on Tropical Building Interiors

12-12-2014 | Munaaim, Muhammad Arkam C.; Al-Obaidi, Karam M.; Ismail, Mohd Rodzi; Rahman, Abdul Malek Abdul, Sustainability, 2014

A fiber optic daylighting system is an evolving technology for transporting illumination from sunlight into building interiors. This system is a solution developed by daylighting designers to reduce operational costs and enhance comfort. As an innovative technology, fiber optic daylighting ...

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Viscosity and Density of Aqueous Solutions of Carbon Dioxide at Temperatures from (274 to 449) K and at Pressures up to 100 MPa

12-12-2014 | Mark McBride-Wright; Geoffrey C. Maitland; J. P. Martin Trusler, Journal of Chemical & Engineering Data, 2014

The viscosity and density of aqueous solutions of carbon dioxide having mole fractions of CO2 of 0.0086, 0.0168, and 0.0271 are reported. The measurements were made in the single-phase compressed liquid region at temperatures between (294 and 449) K at pressures up to 100 MPa; additional density ...

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Quadruple-Stimuli-Sensitive Polymeric Nanocarriers for Controlled Release under Combined Stimulation

12-12-2014 | Ziquan Cao; Hao Wu; Jie Dong; Guojie Wang, Macromolecules, 2014

Here we report a novel quadruple-stimuli-responsive block copolymer nanocarrier sensitive to pH, temperature, light, and reducing agent. The well-defined amphiphilic diblock copolymer poly(2-nitrobenzyl methacrylate)-SS-poly(dimethylaminoethyl methacrylate) (PNBM-SS-PDMAEMA) was synthesized via ...

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Self‐Regulation Mechanism for Charged Point Defects in Hybrid Halide Perovskites

11-12-2014 | Aron Walsh, David O. Scanlon, Shiyou Chen, X. G. Gong, Su‐Huai Wei, Angewandte Chemie International Edition, 2014

Abstract Hybrid halide perovskites such as methylammonium lead iodide (CH3NH3PbI3) exhibit unusually low free‐carrier concentrations despite being processed at low‐temperatures from solution. We demonstrate, through quantum mechanical calculations, that an origin of this phenomenon is a ...

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