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Showing 37 to 48 of 142 entries
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Fano's Propensity Rule in Angle-Resolved Attosecond Pump-Probe Photoionization.

Physical review letters

Busto D, Vinbladh J, Zhong S, Isinger M, Nandi S, Maclot S, Johnsson P, Gisselbrecht M, L'Huillier A, Lindroth E, Dahlström JM.
PMID: 31697513
Phys Rev Lett. 2019 Sep 27;123(13):133201. doi: 10.1103/PhysRevLett.123.133201.

In a seminal article, Fano predicts that absorption of light occurs preferably with increase of angular momentum. We generalize Fano's propensity rule to laser-assisted photoionization, consisting of absorption of an extreme-ultraviolet photon followed by absorption or emission of an...

N-arylated 3,5-dihydro-4H-dinaphtho[2,1-c:1',2'-e]azepines: axially chiral donors with high helical twisting powers for nonplanar push-pull chromophores.

Chemistry (Weinheim an der Bergstrasse, Germany)

Frank BB, Camafort Blanco B, Jakob S, Ferroni F, Pieraccini S, Ferrarini A, Boudon C, Gisselbrecht JP, Seiler P, Spada GP, Diederich F.
PMID: 19670198
Chemistry. 2009 Sep 14;15(36):9005-16. doi: 10.1002/chem.200900913.

Axially chiral, N-arylated 3,5-dihydro-4H-dinaphtho[2,1-c:1',2'-e]azepines have been prepared by short synthetic protocols from enantiopure 1,1'-bi(2,2'-naphthol) (BINOL) and anilines. Alkynes substituted with two N-phenyldinaphthazepine donors readily undergo a formal [2+2] cycloaddition, followed by retro-electrocyclization, with tetracyanoethene (TCNE) to yield donor-substituted 1,1,4,4-tetracyanobuta-1,3-dienes...

Is Good Clinical Practice Becoming Poor Clinical Care?.

HemaSphere

Le Gouill S, Dreyling M, Caballero MD, Andre M, Doorduijn J, Jurczak W, Jerkeman M, Ghia P, Zinzani PL, Da Silva MG, Dimopoulos M, Trneny M, Delarue R, Walewski J, Gisselbrecht C, López-Guillermo A, Rule S.
PMID: 31723733
Hemasphere. 2017 Dec 20;1(1):e4. doi: 10.1097/HS9.0000000000000004. eCollection 2017 Dec.

No abstract available.

From homoconjugated push-pull chromophores to donor-acceptor-substituted spiro systems by thermal rearrangement.

Chemistry (Weinheim an der Bergstrasse, Germany)

Dengiz C, Dumele O, Kato S, Zalibera M, Cias P, Schweizer WB, Boudon C, Gisselbrecht JP, Gescheidt G, Diederich F.
PMID: 24458911
Chemistry. 2014 Jan 27;20(5):1279-86. doi: 10.1002/chem.201303533. Epub 2014 Jan 02.

Series of homoconjugated push-pull chromophores and donor-acceptor (D-A)-functionalized spiro compounds were synthesized, in which the electron-donating strength of the anilino donor groups was systematically varied. The structural and optoelectronic properties of the compounds were investigated by X-ray analysis, UV/Vis...

Nuclear motion in carbonyl sulfide induced by resonant core electron excitation.

The Journal of chemical physics

Laksman J, Céolin D, Gisselbrecht M, Sorensen SL.
PMID: 20950007
J Chem Phys. 2010 Oct 14;133(14):144314. doi: 10.1063/1.3502116.

The angular anisotropy for selected dissociation channels is measured at resonantly excited states of Σ and Π symmetries at the C and O K-shell ionization edges of carbonyl sulfide. While the kinetic energy released in the reaction is mainly...

Carbene spacers in bis-porphyrinic scaffolds.

Chemical communications (Cambridge, England)

Haumesser J, Gisselbrecht JP, Weiss J, Ruppert R.
PMID: 23108114
Chem Commun (Camb). 2012 Dec 11;48(95):11653-5. doi: 10.1039/c2cc36800e.

The preparation of two meso-imidazolylporphyrins was achieved in good yield by Ullmann coupling between a meso-bromotriarylporphyrin and imidazoles. Subsequent alkylation afforded the corresponding imidazolium functionalized porphyrins as direct precursors of the carbene. The complexation of these azolium salts with...

Role of the Renner-Teller effect after core hole excitation in the dissociation dynamics of carbon dioxide dication.

The Journal of chemical physics

Laksman J, Månsson EP, Grunewald C, Sankari A, Gisselbrecht M, Céolin D, Sorensen SL.
PMID: 22423834
J Chem Phys. 2012 Mar 14;136(10):104303. doi: 10.1063/1.3692293.

The fragmentation of the doubly-charged carbon dioxide molecule is studied after photoexcitation to the C 1s(1)2π(u) and O 1s(1)2π(u) states using a multicoincidence ion-imaging technique. The bent component of the Renner-Teller split states populated in the 1s→ π* resonant...

Spectroscopic Techniques using Synchrotron Radiation and Free-Electron and Conventional Lasers.

Journal of synchrotron radiation

Tadjeddine A, Peremans A, Le Rille A, Zheng WQ, Ortéga JM, Glotin F, Prazeres R, Meyer M, Lacoursière J, Nahon L, Gisselbrecht M, Morin P, Larzillière M, Marsi M, Taleb-Ibrahimi A, Couprie ME, Hara T, Garzella D.
PMID: 15263494
J Synchrotron Radiat. 1998 May 01;5:293-8. doi: 10.1107/S0909049597015392. Epub 1998 May 01.

Considerable progress in the investigation of the electronic and vibrational properties of atoms, molecules, materials, surfaces and interfaces has been achieved by combining different photon sources of complementary characteristics. In this paper some experimental results obtained recently at LURE...

Mixed-valence, mixed-spin-state, and heterometallic [2x2] grid-type arrays based on heteroditopic hydrazone ligands: synthesis and electrochemical features.

Chemistry (Weinheim an der Bergstrasse, Germany)

Uppadine LH, Gisselbrecht JP, Kyritsakas N, Nättinen K, Rissanen K, Lehn JM.
PMID: 15729682
Chemistry. 2005 Apr 08;11(8):2549-65. doi: 10.1002/chem.200401224.

An extended family of heterometallic [(M1)2(M2)2(L-)4](n+) [2x2] grid-type arrays 1-9 has been prepared. The three-tiered synthetic route encompasses regioselective, redox and enantioselective features and is based on the stepwise construction of heteroditopic hydrazone ligands A-C. These ligands contain ionisable...

A novel reaction of 7,7,8,8-tetracyanoquinodimethane (TCNQ): charge-transfer chromophores by [2 + 2] cycloaddition with alkynes.

Chemical communications (Cambridge, England)

Kivala M, Boudon C, Gisselbrecht JP, Seiler P, Gross M, Diederich F.
PMID: 18004423
Chem Commun (Camb). 2007 Dec 07;(45):4731-3. doi: 10.1039/b713683h. Epub 2007 Oct 24.

A series of donor-acceptor molecules, featuring intense low-energy intramolecular charge-transfer bands, was prepared by regioselective [2 + 2] cycloaddition between 7,7,8,8-tetracyanoquinodimethane (TCNQ) and N,N-dialkylanilino-substituted (DAA-substituted) alkynes, followed by ring opening of the initially formed cyclobutenes.

Expanding the chemical space for push-pull chromophores by non-concerted [2+2] and [4+2] cycloadditions: access to a highly functionalised 6,6-dicyanopentafulvene with an intense, low-energy charge-transfer band.

Chemical communications (Cambridge, England)

Jayamurugan G, Gisselbrecht JP, Boudon C, Schoenebeck F, Schweizer WB, Bernet B, Diederich F.
PMID: 21399785
Chem Commun (Camb). 2011 Apr 21;47(15):4520-2. doi: 10.1039/c1cc10247h. Epub 2011 Mar 11.

Non-concerted [2+2] and [4+2] cycloadditions between N,N-dimethylanilino-substituted 1,1,2,4,4-pentacyanobuta-1,3-diene and 4-ethynyl-N,N-dimethylaniline are controlled by solvent polarity and provide access to a highly functionalised 6,6-dicyanopentafulvene featuring an intense, low-energy charge-transfer band and to an unusual spirocyclic zwitterion, characterised by X-ray analysis.

Microthermoforming as a novel technique for manufacturing scaffolds in tissue engineering (CellChips).

IEE proceedings. Nanobiotechnology

Giselbrecht S, Gietzelt T, Gottwald E, Guber AE, Trautmann C, Truckenmüller R, Weibezahn KF.
PMID: 16475860
IEE Proc Nanobiotechnol. 2004 Aug;151(4):151-7. doi: 10.1049/ip-nbt:20040824.

The CellChip is a microstructured polymer scaffold, which favours a three-dimensional cultivation of cells within an array of cubic microcontainers. The manufacturing process used so far is microinjection moulding combined with laser-based perforation. In a first attempt to simplify...

Showing 37 to 48 of 142 entries