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Density Functional Theory Study of the Oligomerization of Carboxylic Acids

12-11-2014 | Devis Di Tommaso; Ken L. Watson, Journal of Physical Chemistry A, 2014

We present a density functional theory [M06-2X/6-31+G(d,p)] study of the structures and free energies of formation of oligomers of four carboxylic acids (formic acid, acetic acid, tetrolic acid, and benzoic acid) in water, chloroform, and carbon tetrachloride. Solvation effects were treated using ...


Voltammetric Determination of 2‐Aminofluoren‐9‐one and Investigation of Its Interaction with DNA on a Glassy Carbon Electrode

11-11-2014 | Andrea Hájková, Jiří Barek, Vlastimil Vyskočil, Electroanalysis, 2014

Abstract Voltammetric behavior of the genotoxic environmental pollutant 2‐aminofluoren‐9‐one (2‐AFN) was investigated using direct current voltammetry (DCV) and differential pulse voltammetry (DPV) at a glassy carbon electrode (GCE) in both negative and positive potential regions. For the ...


Nonviral Gene Delivery: Gemini Bispyridinium Surfactant-Based DNA Nanoparticles

10-11-2014 | Emilia Fisicaro; Carlotta Compari; Franco Bacciottini; Laura Contardi; Nadia Barbero; Guido Viscardi; Pierluigi Quag ..., Journal of Physical Chemistry B, 2014

The interaction with a model membrane, the formation of DNA nanoparticles, and the transfection ability of a homologous series of bispyridinium dihexadecyl cationic gemini surfactants, differing in the length of the alkyl spacer bridging the two pyridinium polar heads in the 1 and 1′ positions ...


Histidine-Derived Nontoxic Nitrogen-Doped Carbon Dots for Sensing and Bioimaging Applications

06-11-2014 | He Huang; Chunguang Li; Shoujun Zhu; Hailong Wang; Cailing Chen; Zhaorui Wang; Tianyu Bai; Zhan Shi; Shouhua Feng, Langmuir, 2014

Nitrogen-doped (N-doped) photoluminescent carbon dots (CDs) were prepared by a one-pot microwave-assisted hydrothermal treatment using histidine as the sole carbon source in the absence of acid, alkali, or metal ions. With a diameter of 2–5 nm, the synthesized CDs had apparent lattice fringes and ...


Novel Fluorescence Resonance Energy Transfer Optical Sensors for Vitamin B12 Detection using Thermal Reduced Carbon Dots

04-11-2014 | jilong wang; junhua wei; siheng Su; Jenny Qiu, New Journal of Chemistry, 2014

In this paper, a novel thermal-reduced carbon dots (t-CDs) based fluorescence resonance energy transfer (FRET) sensor for determination of vitamin B12 (VB12) in aqueous solution is reported. Carbon dots (CDs) have attracted great attention due to their excellent tunable optical properties, low ...


New Pathway for Heterogenization of Molecular Catalysts by Non-covalent Interactions with Carbon Nanoreactors

04-11-2014 | Maria A. Lebedeva; Thomas W. Chamberlain; Martin Schröder; Andrei N. Khlobystov, Chemistry of Materials, 2014

A novel approach to heterogenization of catalytic molecules is demonstrated using the nanoscale graphitic step edges inside hollow graphitized carbon nanofibers (GNFs). The presence of the fullerene C60 moiety within a fullerene–salen CuII complex is essential for anchoring the catalyst within ...


Molecules, Vol. 19, Pages 17735-17746: Hepatoprotective Effect of the Aqueous Extract of Simarouba amara Aublet (Simaroubaceae) Stem Bark against Carbon Tetrachloride (CCl4)-Induced Hepatic Damage in Rats

31-10-2014 | Maranhão, Hélida M. L.; Vasconcelos, Carlos F. B.; Rolim, Larissa A.; Neto, Pedro J. Rolim; Neto, Jacinto da C. Silv ..., Molecules, 2014

Simarouba amara stem bark decoction has been traditionally used in Brazil to treat malaria, inflammation, fever, abdominal pain, diarrhea, wounds and as a tonic. In this study, we investigate the hepatoprotective effects of the aqueous extract of S. amara stem bark (SAAE) on CCl4-induced hepatic ...


Preparation and characterization of doped and undoped nanoporous carbon for heavy metal removal from aqueous solution

29-10-2014 | Imed Ghiloufi, Lassaad El Mir, physica status solidi (c), 2014

Abstract Nanoporous composites based on pyrogallol and formaldehyde (PF) reached by metallic nickel nanoparticles have been prepared using sol‐gel method to obtain PF/Ni adsorbent materials. The obtained samples were subjected of heat treatment under inert atmosphere at different pyrolysis ...


Electrochemical Raman spectroscopy of carbon nanotube energy transfer complexes

24-10-2014 | Benjamin Hatting, Friederike Ernst, Stephanie Reich, physica status solidi (b), 2014

We present electrochemical Raman measurements on energy transfer complexes formed by combining single‐walled carbon nanotubes and dye molecules. The presence of the dye molecules in the proximity of the nanotubes impacts the nanotubes’ charging behavior, leading to changes in the position of ...


Wireless Electrosampling of Heavy Metals for Stripping Analysis with Bismuth-Based Janus Particles

24-10-2014 | Hanna Sopha; Jérome Roche; Ivan Švancara; Alexander Kuhn, Analytical Chemistry, 2014

In this contribution, a wireless method for the electrolytic sampling of heavy metals at special bismuth-modified particles is presented. For the first time, glassy carbon beads were asymmetrically modified with bismuth using bipolar electrochemistry. The resulting chemically asymmetric beads, ...


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