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Showing 1 to 12 of 956 entries
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Nonadiabatic dynamics of a truncated indigo model.

Physical chemistry chemical physics : PCCP

Cui G, Thiel W.
PMID: 22872211
Phys Chem Chem Phys. 2012 Sep 21;14(35):12378-84. doi: 10.1039/c2cp41867c. Epub 2012 Aug 08.

Indigo (1) is stable when exposed to ultraviolet light. We employ electronic structure calculations and nonadiabatic trajectory surface-hopping dynamics simulations to study the photoinduced processes and the photoprotection mechanism of an indigo model, bispyrroleindigo (2). Consistent with recent static...

Retinitis Pigmentosa Associated with Glucose-6-Phosphate Dehydrogenase Deficiency.

Cureus

Thiel B, Sharma A, Shaikh S.
PMID: 28948126
Cureus. 2017 Jul 23;9(7):e1506. doi: 10.7759/cureus.1506.

We report a case of new onset retinitis pigmentosa (RP) associated with a glucose-6-phosphate dehydrogenase (G6PD) deficiency in a 63-year-old African-American male who presented with worsening night vision over a period of five years. The pathogenesis of G6PD-mediated oxidative...

Using Hilbert transform and classical chains to simulate quantum walks.

Physical review. E

Xiong D, Thiel F, Barkai E.
PMID: 28950452
Phys Rev E. 2017 Aug;96(2):022114. doi: 10.1103/PhysRevE.96.022114. Epub 2017 Aug 08.

We propose a simulation strategy which uses a classical device of linearly coupled chain of springs to simulate quantum dynamics, in particular quantum walks. Through this strategy, we obtain the quantum wave function from the classical evolution. Specially, this...

Cyclization of an α,β-unsaturated hydrazone catalyzed by a BINOL-phosphoric acid: Pericyclic or not?.

Journal of computational chemistry

Heggen B, Patil M, Thiel W.
PMID: 26373256
J Comput Chem. 2016 Jan 15;37(2):280-5. doi: 10.1002/jcc.24044. Epub 2015 Sep 16.

Density functional theory is used to study the mechanism of the title reaction, one of the first catalytic asymmetric 6π-electrocyclizations observed experimentally. The benzylideneacetone-derived phenyl hydrazone is chosen as model substrate for the cyclization reaction, both in the protonated...

A Striking Case of Enantioinversion in Gold Catalysis and Its Probable Origins.

Chemistry (Weinheim an der Bergstrasse, Germany)

Ilg MK, Wolf LM, Mantilli L, Farès C, Thiel W, Fürstner A.
PMID: 26211656
Chemistry. 2015 Aug 24;21(35):12279-84. doi: 10.1002/chem.201502160. Epub 2015 Jul 23.

The cyclization of the hydroxy-allene 2 to the tetrahydrofuran 3 catalyzed by the gold-phosphoramidite complex 1, after ionization with an appropriate silver salt AgX, is one of the most striking cases of enantioinversion known to date. The major reason...

Spectroscopic and second-order nonlinear optical properties of Ruthenium(ii) complexes: a DFT/MRCI and ADC(2) study.

Physical chemistry chemical physics : PCCP

Escudero D, Thiel W, Champagne B.
PMID: 26149976
Phys Chem Chem Phys. 2015 Jul 15;17(29):18908-12. doi: 10.1039/c5cp01884f.

In this communication we use the density functional theory-based multi-reference configuration interaction (DFT/MRCI) and the second-order algebraic diagrammatic construction (ADC(2)) methods to compute the spectroscopic and second-order nonlinear optical (NLO) properties of Ru(ii)-based NLO-phores. For some of the complexes,...

The effect of changing topography on the coordinated marching of locust nymphs.

PeerJ

Amichay G, Ariel G, Ayali A.
PMID: 27994966
PeerJ. 2016 Dec 13;4:e2742. doi: 10.7717/peerj.2742. eCollection 2016.

Collective motion has traditionally been studied in the lab in homogeneous, obstacle-free environments, with little work having been conducted with changing landscapes or topography. Here, the impact of spatial heterogeneity on the collective motion exhibited by marching desert locust...

Dithiafulvenyl-Extended N-Heterotriangulenes and Their Interaction with C.

Chemistry (Weinheim an der Bergstrasse, Germany)

Gliemann BD, Strauss V, Hitzenberger JF, Dral PO, Hampel F, Gisselbrecht JP, Drewello T, Thiel W, Guldi DM, Kivala M.
PMID: 28574611
Chemistry. 2017 Sep 07;23(50):12353-12362. doi: 10.1002/chem.201701625. Epub 2017 Aug 01.

We describe the synthesis as well as the electronic and photophysical characterization of novel N-heterotriangulene derivatives decorated with methoxycarbonyl- and methyl-sulfanyl-substituted dithiafulvenyl moieties. The association of these electron-rich compounds with fullerene C

α-Radical Phosphines: Synthesis, Structure, and Reactivity.

Angewandte Chemie (International ed. in English)

Gu L, Zheng Y, Haldón E, Goddard R, Bill E, Thiel W, Alcarazo M.
PMID: 28544330
Angew Chem Int Ed Engl. 2017 Jul 17;56(30):8790-8794. doi: 10.1002/anie.201704185. Epub 2017 Jun 23.

A series of phosphines featuring a persistent radical were synthesized in two steps by condensation of dialkyl-/diarylchlorophosphines with stable cyclic (alkyl)(amino)carbenes (cAACs) followed by one-electron reduction of the corresponding cationic intermediates. Structural, spectroscopic, and computational data indicate that the...

Inferior parietal transcranial direct current stimulation with training improves cognition in anomic Alzheimer's disease and frontotemporal dementia.

Alzheimer's & dementia (New York, N. Y.)

Roncero C, Kniefel H, Service E, Thiel A, Probst S, Chertkow H.
PMID: 29067331
Alzheimers Dement (N Y). 2017 Mar 24;3(2):247-253. doi: 10.1016/j.trci.2017.03.003. eCollection 2017 Jun.

INTRODUCTION: We evaluated whether transcranial direct current stimulation (tDCS) can improve picture-naming abilities in subjects with anomic Alzheimer or frontotemporal dementias.METHODS: Using a double-blind crossover design, 10 participants were trained on picture naming over a series of 10 sessions...

Regulation of Three Nitrogenase Gene Clusters in the Cyanobacterium Anabaena variabilis ATCC 29413.

Life (Basel, Switzerland)

Thiel T, Pratte BS.
PMID: 25513762
Life (Basel). 2014 Dec 11;4(4):944-67. doi: 10.3390/life4040944.

The filamentous cyanobacterium Anabaena variabilis ATCC 29413 fixes nitrogen under aerobic conditions in specialized cells called heterocysts that form in response to an environmental deficiency in combined nitrogen. Nitrogen fixation is mediated by the enzyme nitrogenase, which is very...

Smallest molecular chalcogenidometalate anions of the heaviest metals: syntheses, structures, and their interconversion.

Dalton transactions (Cambridge, England : 2003)

Thiele G, Donsbach C, Riedel R, Marsch M, Harms K, Dehnen S.
PMID: 26605971
Dalton Trans. 2016 Apr 14;45(14):5958-67. doi: 10.1039/c5dt03996g. Epub 2015 Nov 25.

The syntheses of the first molecular meta-selenidomercurate(ii), ortho-telluridothallate(iii) and a hydrate of an ortho-selenidoplubate(iv) are presented alongside an improved and facile synthesis of the selenidobismuthate(iii) with almost quantitative yields. By means of quantum chemical calculations, the energetics of the...

Showing 1 to 12 of 956 entries