Publications by Céline Besnard

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In this paper the anisotropy of anomalous scattering at the Br K-absorption edge in brominated nucleotides is investigated, and it is shown that this effect can give rise to a marked directional dependence of the anomalous signal strength in X-ray diffract ...

X-ray induced anisotropic variations of cell parameters in porcine pancreatic elastase (PPE) were used in a multi-Pawley refinement in order to improve the deconvolution of overlapping peaks occurring in the high-angle region of the powder pattern. The ben ...

The preparation of single crystals suitable for X-ray analysis is frequently the most difﬁcult step in structural studies of proteins.With the aid of two examples, it is shown that de novo solution of the crystallographic phase problem can be achieved at l ...

Radiation damage in macromolecular crystals is not suppressed even at 90 K. This is particularly true for covalent bonds involving an anomalous scatterer (such as bromine) at the `peak wavelength'. It is shown that a series of absorption spectra recorded o ...

Unsymmetrical cationic [4] helicenes react with hydride or organolithium reagents and the two diastereotopic faces can be discriminated with high efficiency (dr up to and higher than 49 : 1) ...

Following the seminal work of Von Dreele, high quality powder X-ray diffraction studies on proteins are being established as a valuable complementary technique to single-crystal measurements. Several studies using a variety of experiments approaches have b ...

In the covalently linked 2D coordination network {Fe(bbtr)32}∞, bbtr = 1,4-di(1,2,3-triazol-1-yl)butane, the iron(II) centers stay in the high-spin (HS) state down to 10 K. They can, however, be quantitatively converted to the low-spin (LS) state by ...

Protein powder diffraction is shown to be suitable for obtaining de novo solutions to the phase problem at low resolution via phasing methods such as the isomorphous replacement method. Two heavy-atom derivatives (a gadolinium derivative and a holmium deri ...

Synthesis, properties and reactions of two isomeric dipyrido-1,4-dithiins of the C-2h and C-2v symmetry are described. Their structure detennination and identification are based on spectroscopic methods (H-1 and C-13 NMR, HETCOR, gHMBC and MS), physical pr ...

In the spin-crossover compound Fe(6-mepy)(3)tren(2), (6-mepy)(3)tren=tris{4-[(6-methyl)-2-pyridyl]-3-aza-butenyl}amine, the high-spin state can be populated as a metastable state below the thermal transition temperature via irradiation into the meta ...

The Hoffman-type coordination compound [Fe(pz)Pt(CN)(4)]2.6H(2)O (pz=pyrazine) shows a cooperative thermal spin transition at around 270K. Synchrotron powder X-Ray diffraction studies reveal that a quantitative photoinduced conversion from the low-spin (LS ...

Céline Besnard

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Polarization-dependence of anomalous scattering in brominated DNA and RNA molecules, and importance of crystal orientation in single- and multiple-wavelength anomalous diffraction phasing

Exploiting X-ray induced anisotropic lattice changes to improve intensity extraction in protein powder diffraction: Application to heavy atom detection

Molecular envelopes derived from protein powder diffraction Molecular envelopes derived from protein powder diffraction data

Using X-ray absorption spectra to monitor specific radiation damage to anomalously scattering atoms in macromolecular crystallography

Highly selective additions of hydride and organolithium nucleophiles to helical carbenium ions

Powder diffraction studies on proteins: An overview of data collection approaches

Persistent Bidirectional Optical Switching in the 2D High-Spin Polymer {[Fe(bbtr)3](BF4)2}∞

Features of the secondary structure of a protein molecule from powder diffraction data

Synthesis and structure of dipyrido-1,4-dithiins

Determination of the molecular structure of the short-lived light-induced high-spin state in the spin-crossover compound [Fe(6-mepy)(3)tren](PF6)(2)

Structural Investigation of the High Spin -> Low Spin Relaxation Dynamics of the Porous Coordination Network [Fe(pz)Pt(CN)(4)]center dot 2.6H(2)O

A Polymorph Lost and Found: The High-Temperature Crystal Structure of Pentacene

How close can halogen atoms get in a crystal - triphenylmethylbromide

X-ray induced changes in organic and biological crystalline materials

Large uniaxial negative thermal expansion in pentacene due to steric hindrance