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Showing 1 to 12 of 250 entries
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Superacidic or not…? Synthesis, characterisation, and acidity of the room-temperature ionic liquid [C(CH3)3]+  [Al2Br7]-.

Chemistry (Weinheim an der Bergstrasse, Germany)

Scholz F, Himmel D, Scherer H, Krossing I.
PMID: 23180742
Chemistry. 2013 Jan 02;19(1):109-16. doi: 10.1002/chem.201203260. Epub 2012 Nov 23.

The room-temperature ionic liquid (RT-IL) [C(CH(3))(3)](+)[Al(2)Br(7)](-) (m.p. 2 °C) was generated by bromide abstraction from tert-butyl bromide with the Lewis acid aluminum bromide in the absence of solvent. The crystal structure of the tert-butyl cation salt was determined by...

Photoinduced electron transfer (PET) versus excimer formation in supramolecular p/n-heterojunctions of perylene bisimide dyes and implications for organic photovoltaics.

Faraday discussions

Nowak-Król A, Fimmel B, Son M, Kim D, Würthner F.
PMID: 26399996
Faraday Discuss. 2015;185:507-27. doi: 10.1039/c5fd00052a.

Foldamer systems comprised of two perylene bisimide (PBI) dyes attached to the conjugated backbones of 1,2-bis(phenylethynyl)benzene and phenylethynyl-bis(phenylene)indane, respectively, were synthesized and investigated with regard to their solvent-dependent properties. UV/Vis absorption and steady-state fluorescence spectra show that both foldamers...

Unified pH values of liquid chromatography mobile phases.

Analytical chemistry

Suu A, Jalukse L, Liigand J, Kruve A, Himmel D, Krossing I, Rosés M, Leito I.
PMID: 25664372
Anal Chem. 2015 Mar 03;87(5):2623-30. doi: 10.1021/ac504692m. Epub 2015 Feb 23.

This work introduces a conceptually new approach of measuring pH of mixed-solvent liquid chromatography (LC) mobile phases. Mobile phase pH is very important in LC, but its correct measurement is not straightforward, and all commonly used approaches have deficiencies....

From unsuccessful H2-activation with FLPs containing B(Ohfip)3 to a systematic evaluation of the Lewis acidity of 33 Lewis acids based on fluoride, chloride, hydride and methyl ion affinities.

Dalton transactions (Cambridge, England : 2003)

Böhrer H, Trapp N, Himmel D, Schleep M, Krossing I.
PMID: 25803574
Dalton Trans. 2015 Apr 28;44(16):7489-99. doi: 10.1039/c4dt02822h.

The possibility of obtaining frustrated Lewis pairs (FLPs) suitable for H2-activation based on the Lewis acid B(Ohfip)3 1 (Ohfip = OC(H)(CF3)2) was investigated. In this context, the crystal structure of 1 as well as the crystal structure of the...

OC-06 - Pro-thrombotic biomarkers in pancreatic diseases: are they specific of cancer?.

Thrombosis research

Faille D, Ajzenberg N, de Chaisemartin L, Granger V, Chollet-Martin S, de Raucourt E, Hammel P, Lévy P, Ruszniewski P, Rebours V.
PMID: 27161678
Thromb Res. 2016 Apr;140:S170-1. doi: 10.1016/S0049-3848(16)30123-2. Epub 2016 Apr 08.

INTRODUCTION: Venous thrombo-embolic events (VTE) occur frequently in patients with pancreatic cancer and contribute to elevated morbidity and mortality. Clinical risk factors for thrombosis such as cancer stage and tumor grade have been clearly identified. Recently, several biomarkers have...

The relationship between religiosity and health-risk factors in geriatrics.

Journal of religion and health

Thorne C, Nickerson D, Gemmel D.
PMID: 24264634
J Relig Health. 1996 Jun;35(2):149-58. doi: 10.1007/BF02354524.

BACKGROUND: This study investigates the relationship between religion and alcohol use, sedentary life style, and tobacco use. A survey of 990 noninstitutionalized persons 62 years of age and older was completed. Five life-style questions, three religious questions, and patient...

Erratum to: Validation of the custo screen pediatric blood pressure monitor according to the European Society of Hypertension International Protocol revision 2010.

European journal of pediatrics

Beime B, Deutsch C, Krüger R, Wolf A, Müller P, Hammel G, Bramlage P.
PMID: 28470442
Eur J Pediatr. 2017 Jun;176(6):835-836. doi: 10.1007/s00431-017-2910-3.

No abstract available.

The Acidity of the HBr/AlBr3 System: Stabilization of Crystalline Protonated Arenes and Their Acidity in Bromoaluminate Ionic Liquids.

Chemistry (Weinheim an der Bergstrasse, Germany)

Scholz F, Himmel D, Eisele L, Unkrig W, Martens A, Schlüter P, Krossing I.
PMID: 25808398
Chemistry. 2015 May 11;21(20):7489-502. doi: 10.1002/chem.201405952. Epub 2015 Mar 25.

Bulk protonated mesitylene, toluene, and benzene bromoaluminate salts were stabilized and characterized in the superacidic system HBr/n AlBr3 with NMR spectroscopy and X-ray analysis of [HC6 H3 (CH3 )3 ](+) [AlBr4 ](-) (1), [HC6 H5 (CH3 )](+) [AlBr4 ](-)...

Direct Observation of Excimer-Mediated Intramolecular Electron Transfer in a Cofacially-Stacked Perylene Bisimide Pair.

Journal of the American Chemical Society

Sung J, Nowak-Król A, Schlosser F, Fimmel B, Kim W, Kim D, Würthner F.
PMID: 27407012
J Am Chem Soc. 2016 Jul 27;138(29):9029-32. doi: 10.1021/jacs.6b04591. Epub 2016 Jul 19.

We have elucidated excimer-mediated intramolecular electron transfer in cofacially stacked PBIs tethered by two phenylene-butadiynylene loops. The electron transfer between energetically equivalent PBIs is revealed by the simultaneous observation of the PBI radical anion and cation bands in the...

Coordination Chemistry of Diiodine and Implications for the Oxidation Capacity of the Synergistic Ag(+) /X2 (X=Cl, Br, I) System.

Angewandte Chemie (International ed. in English)

Malinowski PJ, Himmel D, Krossing I.
PMID: 27411163
Angew Chem Int Ed Engl. 2016 Aug 01;55(32):9262-6. doi: 10.1002/anie.201603913. Epub 2016 Jul 13.

The synergistic Ag(+) /X2 system (X=Cl, Br, I) is a very strong, but ill-defined oxidant-more powerful than X2 or Ag(+) alone. Intermediates for its action may include [Agm (X2 )n ](m+) complexes. Here, we report on an unexpectedly variable...

Comparison of magneto-optical properties of various excitonic complexes in CdTe and CdSe self-assembled quantum dots.

Journal of physics. Condensed matter : an Institute of Physics journal

Kobak J, Smoleński T, Goryca M, Rousset JG, Pacuski W, Bogucki A, Oreszczuk K, Kossacki P, Nawrocki M, Golnik A, Płachta J, Wojnar P, Kruse C, Hommel D, Potemski M, Kazimierczuk T.
PMID: 27173643
J Phys Condens Matter. 2016 Jul 06;28(26):265302. doi: 10.1088/0953-8984/28/26/265302. Epub 2016 May 13.

We present a comparative study of two self-assembled quantum dot (QD) systems based on II-VI compounds: CdTe/ZnTe and CdSe/ZnSe. Using magneto-optical techniques we investigated a large population of individual QDs. The systematic photoluminescence studies of emission lines related to...

Enzymes, Energy, and the Environment: A Strategic Perspective on the U.S. Department of Energy's Research and Development Activities for Bioethanol.

Biotechnology progress

Sheehan J, Himmel M.
PMID: 10514251
Biotechnol Prog. 1999 Oct 01;15(5):817-827. doi: 10.1021/bp990110d.

For well over one hundred years, researchers around the world have pursued ways to make ethanol from biomass such as wood, grasses, and waste materials. To distinguish it from ethanol made from starch and sugars in traditional agricultural crops,...

Showing 1 to 12 of 250 entries