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Showing 1 to 12 of 173 entries
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Improving the fatigue resistance of diarylethene switches.

Journal of the American Chemical Society

Herder M, Schmidt BM, Grubert L, Pätzel M, Schwarz J, Hecht S.
PMID: 25679768
J Am Chem Soc. 2015 Feb 25;137(7):2738-47. doi: 10.1021/ja513027s. Epub 2015 Feb 13.

When applying photochromic switches as functional units in light-responsive materials or devices, an often disregarded yet crucial property is their resistance to fatigue during photoisomerization. In the large family of diarylethene photoswitches, formation of an annulated isomer as a...

Towards Pervasive Augmented Reality: Context-Awareness in Augmented Reality.

IEEE transactions on visualization and computer graphics

Grubert J, Langlotz T, Zollmann S, Regenbrecht H.
PMID: 27008668
IEEE Trans Vis Comput Graph. 2017 Jun;23(6):1706-1724. doi: 10.1109/TVCG.2016.2543720. Epub 2016 Mar 17.

Augmented Reality is a technique that enables users to interact with their physical environment through the overlay of digital information. While being researched for decades, more recently, Augmented Reality moved out of the research labs and into the field....

Are copper(I) carbenes capable intermediates for cyclopropanations? The case for ylide intermediates.

Chemistry (Weinheim an der Bergstrasse, Germany)

Aldajaei JT, Keeffe JR, Swift CA, Gronert S.
PMID: 26179611
Chemistry. 2015 Sep 01;21(36):12702-8. doi: 10.1002/chem.201501550. Epub 2015 Jul 14.

A novel approach is used to synthesize a stable, ligated copper(I) carbene in the gas phase that is capable of typical metal carbenoid chemistry. However, it is shown that copper(I) carbenes generally undergo rapid unimolecular rearrangements including insertions into...

A mass spectrometric method for rapidly assaying the chiral selectivities of the copper(I) complexes of C2-symmetric ligands.

Journal of mass spectrometry : JMS

Davis MC, Gronert S.
PMID: 26505773
J Mass Spectrom. 2015 Nov;50(11):1279-87. doi: 10.1002/jms.3643.

A gas-phase method for rapidly assaying the enantioselectivity of metal-centered catalysts is presented. It relies on gas-phase equilibrium measurements in a quadrupole ion trap mass spectrometer. A group of well-established C2-symmetric bis-oxazoline copper(I) complexes was used to identify chiral...

Mid-Burdigalian Paratethyan alkenone record reveals link between orbital forcing, Antarctic ice-sheet dynamics and European climate at the verge to Miocene Climate Optimum.

Global and planetary change

Grunert P, Tzanova A, Harzhauser M, Piller WE.
PMID: 25844022
Glob Planet Change. 2014 Dec;123:36-43. doi: 10.1016/j.gloplacha.2014.10.011.

The Early Ottnangian Cooling (EOC), a distinct cold-spell in European climate at ~ 18 Ma preceding the Miocene Climate Optimum, is frequently reported in Paratethys records; however, the duration, magnitude, and underlying causes are poorly understood. A new palaeoclimatic...

Efficient Verification of Holograms Using Mobile Augmented Reality.

IEEE transactions on visualization and computer graphics

Hartl AD, Arth C, Grubert J, Schmalstieg D.
PMID: 26561461
IEEE Trans Vis Comput Graph. 2016 Jul;22(7):1843-51. doi: 10.1109/TVCG.2015.2498612. Epub 2015 Nov 06.

Paper documents such as passports, visas and banknotes are frequently checked by inspection of security elements. In particular, optically variable devices such as holograms are important, but difficult to inspect. Augmented Reality can provide all relevant information on standard...

Unusual hydroxyl effect on fulvene endoperoxide decompositions.

Tetrahedron letters

Erden I, Basada J, Poli D, Cabrera G, Xu F, Gronert S.
PMID: 27175039
Tetrahedron Lett. 2016 May 18;57(20):2190-2193. doi: 10.1016/j.tetlet.2016.04.024.

The thermal decomposition of fulvene endoperoxides ordinarily proceeds via an allene oxide intermediate affording oxepin-2(

The architecture of Mourera fluviatilis (Podostemaceae): developmental morphology of inflorescences, flowers, and seedlings.

American journal of botany

Rutishauser R, Grubert M.
PMID: 10406713
Am J Bot. 1999 Jul;86(7):907-22.

Mourera fluviatilis from northern South America is a spectacular member of the Podostemaceae (river-weeds). Its raceme-like inflorescences are up to 64 cm long and have 40-90 flowers arranged in two opposite rows. Inflorescence development starts with the initiation of...

Natural-Product Hybrids: Design, Synthesis, and Biological Evaluation of Quinone-Annonaceous Acetogenins This work was supported by the Deutsche Forschungs-gemeinschaft, Fonds der Chemische Industrie, and ASTA-Medica AG.

Angewandte Chemie (International ed. in English)

Hoppen S, Emde U, Friedrich T, Grubert L, Koert U.
PMID: 10941027
Angew Chem Int Ed Engl. 2000 Jun 16;39(12):2099-2102. doi: 10.1002/1521-3773(20000616)39:12<2099::aid-anie2099>3.0.co;2-y.

No abstract available.

Structural and solvent effects on the mechanism of base-induced rearrangement of epoxides to allylic alcohols.

The Journal of organic chemistry

Morgan KM, Gronert S.
PMID: 10814110
J Org Chem. 2000 Mar 10;65(5):1461-6. doi: 10.1021/jo991619q.

A combined experimental and computational study is presented which explores the influence of structure and solvent on the base-catalyzed isomerization of cyclopentene- and cyclohexene oxides. Cyclohexene oxide is known to rearrange via a syn beta-elimination in nonpolar solvents. Cyclopentene...

Neurotropic effect of juvenile hormone III in larvae of the cockroach, Periplaneta americana.

Journal of insect physiology

Richter K, Gronert M.
PMID: 12770267
J Insect Physiol. 1999 Dec;45(12):1065-1071. doi: 10.1016/s0022-1910(99)00090-6.

Juvenile hormone III and juvenile hormone analogs (methoprene, farnesyl methyl ether) cause a short-term depression of spike activity in last instar larvae of the cockroach Periplaneta americana, specifically in the prothoracic gland nerves, both in vivo and in vitro....

Mass spectrometric studies of organic ion/molecule reactions.

Chemical reviews

Gronert S.
PMID: 11712250
Chem Rev. 2001 Feb;101(2):329-60. doi: 10.1021/cr9900836.

In the past 25 years, a tremendous amount of work has been published on the ion/molecule reactions of organic species. This review provides an overview of the areas where gas phase ion chemistry has made a contribution to our...

Showing 1 to 12 of 173 entries