287822

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Showing 1-18 of 18 results for "287822" within Papers

Bioinspired Polymer Nanocomposites Exhibit Giant Energy Density and High Efficiency at High Temperature.

Wenhan Xu et al.

Small (Weinheim an der Bergstrasse, Germany), 15(28), e1901582-e1901582 (2019-05-16)

Polymer dielectrics are ubiquitous in advanced electric energy storage systems. However, the relatively low operating temperature significantly menaces their widespread application at high temperatures, such as for hybrid vehicles and aerospace power electronics. Spider silk, a natural nanocomposite comprised of

Characteristics of Low Band Gap Copolymers Containing Anthracene-Benzothiadiazole Dicarboxylic Imide: Synthesis, Optical, Electrochemical, Thermal and Structural Studies.

Ary R Murad et al.

Polymers, 13(1) (2020-12-31)

Two novel low band gap donor-acceptor (D-A) copolymers, poly[9,10-bis(4-(dodecyloxy)phenyl)-2,6-anthracene-alt-5,5-(4',7'-bis(2-thienyl)-2',1',3'-benzothiadiazole-N-5,6-(3,7-dimethyloctyl)dicarboxylic imide)] (PPADTBTDI-DMO) and poly[9,10-bis(4-(dodecyloxy)phenyl)-2,6-anthracene-alt-5,5-(4',7'-bis(2-thienyl)-2',1',3'-benzothiadiazole-5,6-N-octyl-dicarboxylic imide)] (PPADTBTDI-8) were synthesized in the present work by copolymerising the bis-boronate ester of 9,10-phenylsubstituted anthracene flanked by thienyl groups as electron-donor units with benzothiadiazole dicarboxylic imide

Planar-rotor architecture based pyrene-vinyl-tetraphenylethylene conjugated systems: photophysical properties and aggregation behavior.

Debabrata Jana et al.

Organic & biomolecular chemistry, 13(43), 10663-10674 (2015-09-09)

Four pyrene-vinyl-tetraphenylethylene based conjugated materials were synthesized and characterized by FT-IR, NMR, and mass spectroscopy. The photophysical (including absorption, fluorescence, and fluorescence lifetime) and aggregation properties in tetrahydrofuran were investigated. The photophysical and aggregation behavior depends on the spacer, substituent

Photophysical properties of three coordinated copper(i) complexes bearing 1,10-phenanthroline and a monodentate phosphine ligand.

Daichi Kakizoe et al.

Dalton transactions (Cambridge, England : 2003), 46(43), 14804-14811 (2017-10-19)

We report the synthesis and photophysical properties of Cu(i) complexes with 1,10-phenanthroline (phen) and monodentate phosphine ligands. Single crystal X-ray structural analysis revealed that these have three-coordinated trigonal planar geometries. We also found that one of them, [Cu(phen)(Johnphos)]BF

Coordination chemistry and mechanisms of metal-catalyzed CC-coupling reactions. Part 7. Heck vinylation of aryl halides with n-butyl acrylate: relevance of PC bond cleavage to catalyst deactivation

Wolfgang H A et al.

Journal of Molecular Catalysis. B, Enzymatic, 103, 133-146 (1995)

Tri (o-tolyl) phosphine for highly efficient Suzuki coupling of propargylic carbonates with boronic acids

Junzhe X et al.

Chemical Communications (Cambridge, England), 54, 10451-10454 (2018)

Design of flexible polyphenylene proton-conducting membrane for next-generation fuel cells.

Junpei Miyake et al.

Science advances, 3(10), eaao0476-eaao0476 (2017-10-28)

Proton exchange membrane fuel cells (PEMFCs) are promising devices for clean power generation in automotive, stationary, and portable applications. Perfluorosulfonic acid (PFSA) ionomers (for example, Nafion) have been the benchmark PEMs; however, several problems, including high gas permeability, low thermal

Facilely Synthesized spiro[fluorene-9,9'-phenanthren-10'-one] in Donor-Acceptor-Donor Hole-Transporting Materials for Perovskite Solar Cells.

Yih-Chun Chen et al.

ChemSusChem, 11(18), 3225-3233 (2018-07-08)

We have demonstrated two novel donor-acceptor-donor (D-A-D) hole-transport material (HTM) with spiro[fluorene-9,9'-phenanthren-10'-one] as the core structure, which can be synthesized through a low-cost process in high yield. Compared to the incorporation of the conventional HTM of commonly used 2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD)

Unusual emission properties of the selected organosilicon compounds containing a styryl-carbazole chromophore: inversion of the singlet excited states.

K Rachuta et al.

Physical chemistry chemical physics : PCCP, 19(18), 11698-11705 (2017-04-25)

The spectroscopic and photophysical properties of silicon-containing styryl-carbazole were investigated in various solvents, and the results were analyzed with reference to its carbon derivatives. In n-hexane, both the silicon- and the carbon-containing compounds had very similar emission properties. In acetonitrile

Role of sterics in phosphine-ligated gold clusters.

Katherine A Parrish et al.

Physical chemistry chemical physics : PCCP, 21(4), 1689-1699 (2018-09-28)

This study examined the solution-phase exchange reactions of triphenylphosphine (PPh3) ligands on Au8L72+ (L = PPh3) gold clusters with three different tolyl ligands using electrospray ionization mass spectrometry to provide insight into how steric differences in the phosphines influence the

Tuneable Emission of Polyhedral Oligomeric Silsesquioxane Based Nanostructures that Self-Assemble in the Presence of Europium(III) Ions: Reversible trans-to-cis Isomerization.

Valerio Cinà et al.

ChemPlusChem, 85(3), 391-398 (2020-03-03)

Hybrid nanostructures with switchable and reversible "blue-red-green" emission were efficiently synthesized. These nanostructures comprise polyhedral oligomeric silsesquioxanes (POSS) that behave as a nanocage that can be functionalized with terpyridine-based organic ligands, which can be easily complexed with europium (III) ions.

Effect of MPTP on Serotonergic Neuronal Systems and Mitochondrial Complex I Activity in the Living Brain: A PET Study on Conscious Rhesus Monkeys.

Masakatsu Kanazawa et al.

Journal of nuclear medicine : official publication, Society of Nuclear Medicine, 58(7), 1111-1116 (2017-03-11)

The objective of the present PET study was to compare the effect of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) on serotonergic neuronal systems and mitochondrial complex I (MC-I) activity with that of dopamine in conscious rhesus monkeys (

Efficient syntheses of [¹¹C]zidovudine and its analogs by convenient one-pot palladium(0)-copper(I) co-mediated rapid C-[¹¹C]methylation.

Zhouen Zhang et al.

Journal of labelled compounds & radiopharmaceuticals, 57(8), 540-549 (2014-07-06)

The nucleosides zidovudine (AZT), stavudine (d4T), and telbivudine (LdT) are approved for use in the treatment of human immunodeficiency virus (HIV) and hepatitis B virus (HBV) infections. To promote positron emission tomography (PET) imaging studies on their pharmacokinetics, pharmacodynamics, and

Preclinical PET Studies of [11C]UCB-J Binding in Minipig Brain.

Majken Borup Thomsen et al.

Molecular imaging and biology, 22(5), 1290-1300 (2020-06-10)

Loss of neuronal synapse function is associated with a number of brain disorders. The [11C]UCB-J positron emission tomography (PET) tracer allows for in vivo examination of synaptic density, as it binds to synaptic vesicle glycoprotein 2A (SV2A) expressed in presynaptic

Colloidal Crystal Lasers from Monodisperse Conjugated Polymer Particles via Bottom-Up Coassembly in a Sol-Gel Matrix.

Annabel Mikosch et al.

ACS nano, 10(11), 10195-10201 (2016-11-01)

The potential of colloidal crystals for applications in optics and photonics has been recognized since the description of spontaneous self-assembly of monodisperse colloids into periodic opaline geometries. Provided with a laser gain medium, these direct assemblies generate optical feedback and

Polar Side Chain Effects on the Thermoelectric Properties of Benzo[1,2-b:4,5-b']Dithiophene-Based Conjugated Polymers.

Chengjun Pan et al.

Macromolecular rapid communications, 40(12), e1900082-e1900082 (2019-04-04)

The molecular structure of polymers has a great influence on their thermoelectric properties; however, the relationship between the molecular structure of a polymer and its thermoelectric properties remains unclear. In this work, two benzo[1,2-b:4,5-b']dithiophene (BDT)-based conjugated polymers are designed and

Tetrahedron Letters, 47, 8881-8881 (2006)

Catalytic selective deuteration of halo(hetero)arenes.

Manojkumar Janni et al.

Organic & biomolecular chemistry, 14(11), 3091-3097 (2016-02-24)

Deuterium labeled aromatic and heteroaromatic compounds are synthesized in good to excellent yields with >98% deuterium purity via palladium catalyzed deuterodehalogenation reaction using commercially available and inexpensive reagents. Selective deuteration of bromoaniline is also demonstrated without H/D exchange in an

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