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Polymer Containing (polymer + containing)
Selected AbstractsDual Tuning of Emission Color and Electron Injection Properties Through in-situ Chemical Reaction in a Conjugated Polymer Containing 9,10-PhenanthrenequinoneMACROMOLECULAR CHEMISTRY AND PHYSICS, Issue 23 2009Zhiming Wang Abstract Three new polymers were obtained through an in situ chemical reaction of the matrix conjugated polymer (PPQF) with ortho- amine compounds. By controlling the conjugation degree of diamine compounds, the emission of PPQF was tuned from weak blue to bright blue, green, and orange for PFBQ, PFBP and PFNP, respectively. The photoluminescence efficiencies were also improved in the same tendency, and the LUMO levels were gradually decreased from ,2.76 and ,3.12 to ,3.40,eV, which was beneficial for electron injection and transport in electronic devices. Thus, a dual tuning for the emission color and electron injection properties were realized through an in situ chemical reaction, which is a novel strategy to design and construct new valuable polymers from one reactive matrix polymer. [source] Linear Azo Polymer Containing Conjugated 5,5,-Azodisalicylic Acid Segments in the Main Chain: Synthesis, Characterization, and DegradationMACROMOLECULAR RAPID COMMUNICATIONS, Issue 19 2005Junying Lai Abstract Summary: Copolymers of poly(ethylene oxide) (PEO) and 5,5,-azodisalicylic acid (Olsalazine, OLZ) were synthesized and evaluated by hydrolysis and in-vitro biodegradation with azoreductase. It was found that changing the molecular weight of the PEO blocks affected the loading ratio of OLZ, and resulted in significant differences in the hydration and degradability of the copolymers. These novel azo-containing copolymers can be used in colon-specific drug delivery. Release of 5-ASA from OLZ and PEO-OLZ copolymers incubated with rat cecum content in the presence of benzyl viologen and , - D -glucose. [source] New , -Conjugated Polymers Containing 1,3,5-Triazine Units in the Main Chain: Synthesis and Optical and Electrochemical Properties of the Polymers,MACROMOLECULAR RAPID COMMUNICATIONS, Issue 12 2005Shijie Ren Abstract Summary: Three new soluble , -conjugated polymers containing 1,3,5-triazine units in the main chain, Pa,Pc, were synthesized. The polymers showed optical properties in solution that were mainly dependant on the properties of the substituting R groups, on the triazine ring. Hence, Pa and Pb (R,=,H and OCH3, respectively) showed blue photoluminescent (PL) emission with high quantum yields (QY) even in polar solvents, whereas Pc (R,=,N,N -dimethylamino) gave green-blue PL emission with very low QY. The PL spectra of the polymers in solution were concentration and polarity dependent, which suggested the formation of an exciplex. The three new soluble , -conjugated polymers containing 1,3,5-triazine units in the main chain synthesized here. [source] ChemInform Abstract: Luminescent and Magnetic Cyano-Bridged Coordination Polymers Containing 4d,4f Ions: Toward Multifunctional Materials.CHEMINFORM, Issue 37 2009Elena Chelebaeva Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] Preparation of bimodal porous copolymer containing ,-cyclodextrin and its inclusion adsorption behaviorJOURNAL OF APPLIED POLYMER SCIENCE, Issue 4 2010Zhao-Yang Sun Abstract A novel insoluble bimodal porous polymer containing ,-cyclodextrin (,-CD) was prepared to adsorb aromatic amine compound. The process involved copolymerization of styrene and methyl methacrylate with a maleic acid derivative of ,-CD, subsequently, above formed copolymer was foamed by supercritical CO2. The chemical properties and physical structure of obtained copolymer was analyzed using Fourier transform infrared spectra, Thermal gravimetric analysis, X-ray diffraction, scanning electron microscope, and N2 adsorption techniques. The inclusion adsorption of aromatic amine compounds on ,-CD copolymer was carried out in a batch system. The quantities of aromatic amine compounds adsorbed on ,-CD copolymer reached equilibrium within 60 min. The adsorption kinetic could be fitted to a pseudo-second-order kinetic equation, and the linear correlation coefficients varied from 0.9828 to 0.9935. With the influence of molecular structure and hydrophobicity of the aromatic amine compound, the sequence of quantity of aromatic amine compounds adsorbed on ,-CD copolymer is p -toluidine > aniline > benzidine > o -toluidine. The adsorption equilibrium data of aromatic amine compound adsorbed on ,-CD copolymer were fitted to Freundlich and Langmuir models, respectively. The linear correlation coefficients of Langmuir model varied from 0.9516 to 0.9940, and the linear correlation coefficients of Freundlich varied from 0.9752 to 0.9976. It is concluded that Freundlich model fits better than Langmuir model, because the adsorption of aromatic amine compound on ,-CD copolymer is a chemical process. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 [source] Synthesis and magnetic properties of novel fully conjugated polymeric complexes containing 1,10-phenanthrolineJOURNAL OF APPLIED POLYMER SCIENCE, Issue 4 2008Renhua Zheng Abstract A novel fully conjugated polymer containing 1,10-phenanthroline (DAPcDOD) was first synthesized by the polycondensation of 2,7-dimethyl-2,4,6-octatriene-1,8-dial with 5,6-diamine-1,10-phenanthroline. Three polymeric complexes were first prepared by the reaction of DAPcDOD with NiSO4, CoCl2, and FeSO4, respectively. The structures of the polymer and the complexes were characterized by IR, 1H-NMR, and elemental analysis. The magnetic behaviors of these complexes were measured as a function of magnetic field strength (0,50 kOe) at 5 K and as a function of temperature (5,300 K) at a magnetic field strength of 30 kOe. The results show that DAPcDOD,Ni2+ and DAPcDOD,Co2+ were soft ferromagnets, whereas DAPcDOD,Fe2+ exhibited the features of an antiferromagnet. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 [source] A one-dimensional nickel(II) coordination polymer containing 2,6-dipicolinate and dipyrido[3,2- a:2,,3,- c]phenazineACTA CRYSTALLOGRAPHICA SECTION C, Issue 12 2007Yi Ma A new coordination polymer, catena -poly[[(dipyrido[3,2- a:2,,3,- c]phenazine-,2N,N,)nickel(II)]-,-2,6-dipicolinato-,4O2,N,O6:O2,], [Ni(C7H3NO4)(C18H10N4)]n, exhibits a one-dimensional structure in which 2,6-dipicolinate acts as a bridging ligand interconnecting adjacent nickel(II) centers to form a chain structure. The asymmetric unit contains one NiII center, one dipyrido[3,2- a:2,,3,- c]phenazine ligand and one 2,6-dipicolinate ligand. Each NiII center is six-coordinated and surrounded by three N atoms and three O atoms from one dipyrido[3,2- a:2,,3,- c]phenazine ligand and two different 2,6-dipicolinate ligands, leading to a distorted octahedral geometry. Adjacent chains are linked by ,,, stacking interactions and weak interactions to form a three-dimensional supramolecular network. [source] Crystallographic report: Crystal structure of a one-dimensional zinc(II) coordination polymer containing 4,4,-biphenyldicarboxylate hemihydrateAPPLIED ORGANOMETALLIC CHEMISTRY, Issue 4 2003Wei Yuan Abstract A one-dimensional zinc(II) coordination polymer has been constructed from zinc(II), 4,4,-biphenyldicarboxylate and pyridine in which each zinc(II) atom is coordinated by two pyridine ligands and two monodentate 4,4,-biphenyldicarboxylate ligands that define a distorted tetrahedral geometry. Copyright © 2003 John Wiley & Sons, Ltd. [source] | |||||||||||||