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Luminescence Color Tuning of PtII Complexes and a Kinetic Study of Trimer Formation in the Photoexcited State

20-10-2014 | T. Kayano, S. Takayasu, K. Sato, K. Shinozaki, Chemistry - A European Journal, 2014

Abstract We investigated the luminescence properties and color tuning of [Pt(dpb)Cl] (dpbH=1,3‐di(2‐pyridyl)benzene) and its analogues. An almost blue emission was obtained for the complex [Pt(Fmdpb)CN] (FmdpbH=4‐fluoro‐1,3‐di(4‐methyl‐2‐pyridyl)benzene), modified by the introduction of F and ...

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Effect of fiber size on structural and tensile properties of electrospun polyvinylidene fluoride fibers

18-10-2014 | Avinash Baji, Yiu‐Wing Mai, Shing‐Chung Wong, Polymer Engineering and Science, 2014

We use electrospinning to obtain polyvinylidene fluoride (PVDF) fibers and demonstrate simultaneous improvements in β‐crystal microstructure and in tensile properties of fibers with reduction of their diameter. PVDF fibers with average diameters ranging from 70 to 400 nm are obtained by ...

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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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Redox polymer with N,N‐dichlorosulfonamide functional groups as arsenite oxidant in aqueous solutions

18-10-2014 | Daniel Ociński, Ewa Stanisławska, Elżbieta Kociołek‐Balawejder, Journal of Applied Polymer Science, 2014

ABSTRACT A macroporous, styrene‐divinylbenzene polymer with N,N‐dichlorosulfonamide functional groups (SO2NCl2), containing two chlorine atoms with oxidation number +1, have been prepared through the chemical modification of a commercial sulfonic cation exchanger (Amberlyst 15, Rohm and ...

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Breathable properties of m‐Aramid nanofibrous membrane with high thermal resistance

18-10-2014 | Young Shin Park, Jong Wha Lee, Young Sik Nam, Won Ho Park, Journal of Applied Polymer Science, 2014

ABSTRACT Electrospinning of m‐aramid in dimethyl acetamide/LiCl solution was investigated to develop thermo‐resistant nanofibrous membranes for breathable waterproof materials. The m‐aramid nanofibers were continuously generated and densely mounted to the membrane without the blockage of the ...

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In Situ Observation of Ca2+ Diffusion-Induced Superstructure Formation of a Rigid Polyanion

17-10-2014 | Zi Liang Wu; Riku Takahashi; Daisuke Sawada; Md. Arifuzzaman; Tasuku Nakajima; Takayuki Kurokawa; Jian Hu; Jian Ping ..., Macromolecules, 2014

Diffusion of multivalent metallic ions into aqueous solution of rigid, negatively charged macromolecules of high concentration is an effective approach to prepare macroscopically anisotropic hydrogels. However, the mechanism for superstructure formation is still not clear. By observing the mixing ...

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Phosphorescent Polymeric Nanoparticles by Coordination Cross‐Linking as a Platform for Luminescence Imaging and Photodynamic Therapy

16-10-2014 | Yang Lu, Fengfeng Xue, Zhiguo Zhou, Min Shi, Yuping Yan, Lijie Qin, Hong Yang, Shiping Yang, Chemistry - A European Journal, 2014

Abstract Water‐soluble phosphorescent polymeric nanoparticles with an average diameter of approximately 100 nm were synthesized by a coordination cross‐linking reaction. The pyridine blocks in poly(4‐vinyl pyridine‐b‐ethylene oxide) (P4VP‐b‐PEO) were cross‐linked by the iridium ...

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Electrochemical Behavior of Nicotine at Unmodified Carbon Paste Electrode and Its Determination in a Set of Refilling Liquids for Electronic Cigarettes

16-10-2014 | Matěj Stočes, Ivan Švancara, Electroanalysis, 2014

Abstract In this manuscript, a carbon paste electrode (CPE) from traditional components has been used to study the electrochemical oxidation of nicotine and its feasibility to be performed at unmodified and otherwise untreated carbon paste in an effort to propose a simple voltammetric method ...

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Mechanistic Studies of Silica Polymerization from Supersaturated Aqueous Solutions by Means of Time-Resolved Light Scattering

16-10-2014 | M. Kley; A. Kempter; V. Boyko; K. Huber, Langmuir, 2014

Silica polymerization in a supersaturated aqueous solution of sodium silicate is a fundamental mineralization process with broad relevance for technical applications as well as for biological processes. To contribute to a better understanding of the mechanism underlying the polymerization of ...

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Cell‐Assembled Graphene Biocomposite for Enhanced Chondrogenic Differentiation

15-10-2014 | Wong Cheng Lee, Candy Haley Lim, Kenry, Chenliang Su, Kian Ping Loh, Chwee Teck Lim, Small, 2014

Graphene‐based nanomaterials are increasingly being explored for use as biomaterials for drug delivery and tissue engineering applications due to their exceptional physicochemical and mechanical properties. However, the two‐dimensional nature of graphene makes it difficult to extend its ...

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