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Arsenic speciation in artificial saliva extract of smokeless tobacco products by extraction methodologies coupled with electrothermal atomic absorption spectrometry

27-Sep-2015 | Author(s): Sadaf S. Arain, Tasneem G. Kazi, Hassan I. Afridi, Naeemullah, Kapil D. Brahman, Farah N. Ta ..., Microchemical Journal, 2015

Publication date: January 2016 Source:Microchemical Journal, Volume 124 Author(s): Sadaf S. Arain, Tasneem G. Kazi, Hassan I. Afridi, Naeemullah, Kapil D. Brahman, Farah N. Talpur, Abdul H. Panhwar, Jamshed Ali, Faheem Shah Simple and rapid preconcentration methods viz. ...


Analytical gradients for MP2, double hybrid functionals, and TD‐DFT with polarizable embedding described by fluctuating charges

24-Sep-2015 | Ivan Carnimeo, Chiara Cappelli, Vincenzo Barone, Journal of Computational Chemistry, 2015

A polarizable quantum mechanics (QM)/ molecular mechanics (MM) approach recently developed for Hartree–Fock (HF) and Kohn–Sham (KS) methods has been extended to energies and analytical gradients for MP2, double hybrid functionals, and TD‐DFT models, thus allowing the computation of equilibrium ...


Highly Soluble Benzo[ghi]perylenetriimide Derivatives: Stable and Air‐Insensitive Electron Acceptors for Artificial Photosynthesis

23-Sep-2015 | Hung‐Cheng Chen, Chao‐Ping Hsu, Joost N. H. Reek, René M. Williams, Albert M. Brouwer, ChemSusChem, 2015

Abstract A series of new benzo[ghi]perylenetriimide (BPTI) derivatives has been synthesized and characterized. These remarkably soluble BPTI derivatives show strong optical absorption in the range of λ=300–500 nm and have a high triplet‐state energy of 1.67 eV. A cyanophenyl substituent ...


Terahertz Spectroscopy Applied for Investigation of Water Structure

23-Sep-2015 | Nikita Penkov; Nikolay Shvirst; Valery Yashin; Eugeny Fesenko, Jr.; Eugeny Fesenko, Journal of Physical Chemistry B, 2015

The absorption spectra of liquid water and various aqueous solutions were analyzed in a terahertz frequency domain (from 6 to 200 cm–1) which characterize the collective dynamics of water molecules. Particular attention was paid to the relaxation process in the range of ∼6–80 cm–1. The physical ...


Core Perylene Diimide Designs via Direct Bay‐ and ortho‐(Poly)trifluoromethylation: Synthesis, Isolation, X‐ray Structures, Optical and Electronic Properties

22-Sep-2015 | Tyler T. Clikeman, Eric V. Bukovsky, Xue‐Bin Wang, Yu‐Sheng Chen, Garry Rumbles, Steven H. Strauss, Olga V. Boltalina, European Journal of Organic Chemistry, 2015

Abstract We developed an efficient solvent‐ and catalyst‐free direct polytrifluoromethylation of solid perylene‐3,4,9,10‐tetracarboxylic dianhydride that produced a new family of (poly)perfluoroalkyl bay‐ and ortho‐substituted PDIs with two different imide substituents. Direct hydrogen ...


Arsenic detection in water: YPO4:Eu3+ nanoparticles

20-Sep-2015 | Author(s): Debasish Ghosh, Meitram Niraj Luwang, Journal of Solid State Chemistry, 2015

Publication date: December 2015 Source:Journal of Solid State Chemistry, Volume 232 Author(s): Debasish Ghosh, Meitram Niraj Luwang This work reports on the novel technique of detection of arsenic in aqueous solution utilising the luminescence properties of lanthanide doped ...


Novel 4,5,6,7-tetrahydropyrazolo[1,5-a]pyridine fused chlorins as very active photodynamic agents for melanoma cells

20-Sep-2015 | Author(s): Nelson A.M. Pereira, Mafalda Laranjo, Marta Pineiro, Arménio C. Serra, Kathleen Santos, Ricardo ..., European Journal of Medicinal Chemistry, 2015

Publication date: 20 October 2015 Source:European Journal of Medicinal Chemistry, Volume 103 Author(s): Nelson A.M. Pereira, Mafalda Laranjo, Marta Pineiro, Arménio C. Serra, Kathleen Santos, Ricardo Teixo, Ana Margarida Abrantes, Ana Cristina Gonçalves, Ana Bela Sarmento ...


Molecules, Vol. 20, Pages 17362-17377: Isoindigo-Based Small Molecules with Varied Donor Components for Solution-Processable Organic Field Effective Transistor Devices

18-Sep-2015 | Patil, Hemlata ; Chang, Jingjing ; Gupta, Akhil ; Bilic, Ante ; Wu, Jishan ; Sonar, Prashant ; Bhosale, Sheshanath V., Molecules, 2015

Two solution-processable small organic molecules, (E)-6,6′-bis(4-(diphenylamino)phenyl)-1,1′-bis(2-ethylhexyl)-(3,3′-biindolinylidene)-2,2′-dione (coded as S10) and (E)-6,6′-di(9H-carbazol-9-yl)-1,1′-bis(2-ethylhexyl)-(3,3′-biindolinylidene)-2,2′-dione (coded as S11) were successfully designed, ...


Evidence for the Intercalation of Lipid Acyl Chains into Polypropylene Fiber Matrices

18-Sep-2015 | Abby J. Schadock-Hewitt; Terri F. Bruce; R. Kenneth Marcus, Langmuir, 2015

Headgroup-functionalized lipids are being developed as ligand tethers for high selectivity separations on polypropylene capillary-channeled polymer fiber stationary phases. Surface modification is affected under ambient conditions from aqueous solution. This basic methodology has promise in many ...


Measuring the Absorption Rate of CO2 in Nonaqueous CO2‐Binding Organic Liquid Solvents with a Wetted‐Wall Apparatus

17-Sep-2015 | Paul M. Mathias, Feng Zheng, David J. Heldebrant, Andy Zwoster, Greg Whyatt, Charles M. Freeman, Mark D. Bearden, Ph ..., ChemSusChem, 2015

Abstract The kinetics of the absorption of CO2 into two nonaqueous CO2‐binding organic liquid (CO2BOL) solvents were measured at T=35, 45, and 55 °C with a wetted‐wall column. Selected CO2 loadings were run with a so‐called “first‐generation” CO2BOL, comprising an independent base and alcohol, ...


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