Synthesis and characterization of substituted poly(naphthalene)s with imine bonding containing thiophene unit

In this study, 5-(4H-dithieno[3,2-b:2’,3’-d]pyrrol-4-yl)naphthalen-1-amine was synthesized from the required reaction conditions of 3,3'-dibromo-2,2'-bithiophene with 1,5-diamine naphthalene. Then, Schiff base monomers were synthesized from the condensation reactions of 5-(4H-dithieno[3,2-b:2’,3’-d]pyrrol-4-yl)naphthalen-1-amine with mono aldehydes such as 2-hydroxybenzaldehyde, 4-hydroxybenzaldehyde and isovaniline. The Schiff base monomers were polymerized via oxidative polycondensation in 0.1 M KOH aqueous solution at 90°C by 10-15% NaOCl oxidant. The structures of synthesized compounds were carried out by FT-IR, UV-Vis, 1H-NMR, 13C-NMR techniques. Further characterization was implemented by cyclic voltammetry (CV) electrochemical properties, fluorescence (FL) measurements, electrical properties, thermogravimetric-differential thermal analysis (TG-DTA) and differential scanning calorimetry (DSC) measurements. Depending on structural changes of synthesized polymers, differences were observed for the optical, electrochemical, thermal and physical properties. The optical and electrochemical band gaps, conductivity and fluorescence properties of P1 were found to be better than other polymers. The fluorescence intensity of P1 in two different wavelengths was found to be 632 a.u. and 1000 a.u. The optical (Eg) and electrochemical band gap values (E'g) of P1 were found to be 2.34 and 2.25 eV, respectively. This low band gap values have demonstrated to ...
Source: Materials Chemistry and Physics - Category: Materials Science Source Type: research

Related Links:

The U.S. Congress passed a law in 2014 to reduce unnecessary MRI exams, CT...Read more on AuntMinnie.comRelated Reading: CDS prompts appropriate advanced imaging orders Walmart charts new course by steering workers to high-quality imaging centers CDS reduces inappropriate imaging in the ED Medicare's AUC/CDS mandate will begin next year Can local use guidelines reduce inappropriate imaging?
Source: AuntMinnie.com Headlines - Category: Radiology Source Type: news
Publication date: Available online 17 August 2019Source: Food Research InternationalAuthor(s): Valéria Rampazzo Ribeiro, Giselle Maria Maciel, Mariana Millan Fachi, Roberto Pontarolo, Isabela de Andrade Arruda Fernandes, Ana Paula Stafussa, Charles Windson Isidoro HaminiukAbstractGreat efforts have been made to increase the bioaccessibility of bioactive compounds from plant sources. This can be achieved by the innovative and effective method of biosorption of these compounds in Saccharomyces cerevisiae obtained from the industrial fermentative process (waste yeast). In this context, this research evaluated if chemic...
Source: Food Research International - Category: Food Science Source Type: research
In this study, we investigated the biogenic synthesis of nanostructured CuO and CuO/NiO nanocomposites using Azardica indica leaf extract as a reducing agent. The structure, surface morphology, and elemental compositions of the synthesized samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy with energy-dispersive X-ray (EDX) analysis, transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), and Fourier transform-infrared spectroscopy. XRD analysis indicated that the CuO sample had a monoclinic structure and the CuO/NiO samples exhibited a phase mixture with mo...
Source: Journal of Physics and Chemistry of Solids - Category: Physics Source Type: research
Publication date: Available online 17 August 2019Source: Enzyme and Microbial TechnologyAuthor(s): Yue Zhang, Wenhui Sun, Nora Mohamed Elfeky, Yuepeng Wang, Dongying Zhao, Hao Zhou, Jingyun Wang, Yongming BaoAbstractLipase ZC12, a cold-adapted lipase derived from Psychrobacter sp. ZY124, can be effectively activated by Ca2+. Inspired by this significant property, we developed a novel immobilized lipase ZC12/Ca3(PO4)2 hybrid nanoflowers (LHNs). The LHNs have been characterized as a regular hierarchical flowerlike structure nanoflowers by scanning electron microscopy (SEM). Compared with free lipase ZC12, the LHNs exerted en...
Source: Enzyme and Microbial Technology - Category: Biotechnology Source Type: research
Publication date: Available online 17 August 2019Source: Thermochimica ActaAuthor(s): J.H.F. de Jesus, M.S. Souza, J.A. Ellena, E.T.G. CavalheiroABSTRACTInteraction of nucleotides and metals has been largely studied since they have biological importance. Divalent complexes with cobalt(II) (IMP-Co), nickel(II) (IMP-Ni), copper(II) (IMP-Cu) and cadmium(II) (IMP-Cd) with inosine 5′-monophosphate have been characterized by elemental analysis and submitted to thermogravimetry (TG), differential thermal analysis (DTA), differential scanning calorimetry (DSC) and thermogravimetry coupled to infrared spectroscopy (TG-FTIR). ...
Source: Thermochimica Acta - Category: Chemistry Source Type: research
This study provides valuable information for the potential clinical application of IST microparticles and IST composite particles synthesized using the ASES process.Graphical abstract
Source: The Journal of Supercritical Fluids - Category: Chemistry Source Type: research
Publication date: Available online 17 August 2019Source: Polymer TestingAuthor(s): Łukasz Klapiszewski, Aleksandra Grząbka-Zasadzińska, Sławomir Borysiak, Teofil JesionowskiAbstractThe aim of this study was to obtain polypropylene composites filled with a ZnO/lignin hybrid filler and to examine their chemical and mechanical properties. Inorganic-organic hybrid materials were obtained using an environmentally-friendly, low-cost mechanical method. The use of an inorganic component mainly influenced the improvement of thermal properties, in turn, the use of lignin was mainly supported by its low price as well as unique pr...
Source: Polymer Testing - Category: Chemistry Source Type: research
This study aims to gain insight into the influence of environmental effects on the colour, biodegradability, oxidation stability, thermal stability and complex modulus of bamboo/kenaf fiber reinforced epoxy hybrid composites. The composites were prepared by the hand lay-up technique, with a fixed loading of 40% fibers for all the composites. Three types of hybrid composites were prepared with different mixing ratios of bamboo fibers (B) to kenaf fibers (K): (i) 30:70, (ii) 50:50, and (iii) 70:30. Kenaf/epoxy and bamboo/epoxy composites, as well as pure epoxy, were also prepared for comparison purposes. The kenaf, bamboo an...
Source: Polymer Testing - Category: Chemistry Source Type: research
Publication date: Available online 8 August 2019Source: Journal of Photochemistry and Photobiology A: ChemistryAuthor(s): Peng She, Jun Li, Hegang Bao, Xiuquan Xu, Zhou HongA b s t r a c tIn this present study, a novel visible-light-driven Ag nanoparticles (Ag NPs) decorated P-doped g-C3N4 (Ag/PCN) composites were successfully fabricated via a facile method combination of one-pot pyrolysis and green reduction. The structure information of as-prepared samples were well characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoele...
Source: Journal of Photochemistry and Photobiology A: Chemistry - Category: Chemistry Source Type: research
In this report, Sn/graphite/graphene nanocomposites are successfully developed as advanced anode materials for lithium–ion batteries via a facile one–pot synthetic process. The nanocomposites are investigated by X–ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscope, transmission electron microscope, X–ray photoelectron spectroscopy, Brunauer–Emmett–Teller surface area analysis and Thermogravimetric analysis. Results suggest that Sn nanoparticles are tightly embedded in reduced graphene oxide nanosheets, which are in intimate contact ...
Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
More News: Chemistry | Materials Science | PET Scan | Physics | Study