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Marie-Emmanuelle Boulon

Marie-Emmanuelle Boulon
imec · Surface and Interface Processing

PhD

About

35
Publications
4,479
Reads
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1,466
Citations
Citations since 2017
16 Research Items
1042 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Additional affiliations
April 2018 - present
imec
Position
  • R&D ingeneer
April 2017 - April 2018
University of Florence
Position
  • Research Associate
May 2014 - January 2017
The University of Manchester
Position
  • Research Associate
Education
October 2007 - April 2011
Université de Rennes 1
Field of study
  • Chemistry
October 2005 - July 2007
Université de Rouen
Field of study
  • Physics
September 2002 - July 2005
Université de Rouen
Field of study
  • Physic

Publications

Publications (35)
Article
Full-text available
This article reports the syntheses, characterization, structural description, together with magnetic and spectroscopic properties of two isostructural molecular magnets based on the chiral ligand N,N′-bis((1,2-diphenyl-(pyridine-2-yl)methylene)-(R,R/S,S)-ethane-1,2-diamine), L1, of general formula [Ln2(RR-L1)2(Cl6)]·MeOH·1.5H2O, (Ln = Ce (1) or Nd...
Article
Device performance of two dimensional (2D) material based field effect transistors is severely limited by the relatively high contact resistance encountered at the contact-channel interface. Metal-graphene hybrid contacts have been previously used to improve the contact resistance of devices based on thick exfoliated materials. Here we report a nov...
Article
The three Co(II) complexes [Co(bbp)2][Co(NCS)4]·4DMF (1), [Co(bbp)(NCS)2(DMF)]·2DMF (2), and [Co(bbp)(NCS)2] (3) have been synthesized and characterized by single-crystal X-ray diffraction, magnetic, and various spectroscopic techniques. Complexes 1 and 3 are obtained by the reaction of Co(NCS)2 with 2,6-bis(1H-benzo[d]imidazol-2-yl)pyridine (bbp),...
Article
Full-text available
The concurrent effects of single-ion anisotropy and exchange interactions on the electronic structure and magnetization dynamics have been analyzed for a cobalt(II)-semiquinonate complex. Analogs containing diamagnetic catecholate and tropolonate ligands...
Article
The family of complexes of general formula [Co(Me n tpa)(Xdiox)] ⁺ (tpa = tris(2-pyridylmethyl)amine, n = 0-3 corresponds to successive methylation of the 6-position of the pyridine rings; X = Br 4 , Cl 4 , H 4 , 3,5-Me 2 , 3,5-tBu 2 ; diox = dioxolene) was investigated by density functional theory (DFT) calculations to predict the likelihood of va...
Article
Full-text available
In the search for new single molecule magnets (SMM), i.e., molecular systems that can retain their magnetization without the need to apply an external magnetic field, a successful strategy is to associate 3d and 4f ions to form molecular coordination clusters. In order to efficiently design such systems, it is necessary to chemically project both t...
Article
Practical implementation of highly coherent molecular spin qubits for challenging technological applications, such as quantum information processing or quantum sensing, requires precise organization of electronic qubit molecular components into extended frameworks. Realization of spatial control over qubit-qubit distances can be achieved by coordin...
Article
The combination of lanthanoid nitrates with 18‐crown‐6 (18‐c‐6) and tetrahalocatecholate (X4Cat2‐, X = Cl, Br) ligands has afforded two compound series [Ln(18‐c‐6)(X4Cat)(NO3)]·MeCN (X = Cl, 1‐Ln; X = Br, 2‐Ln; Ln = La, Ce, Nd, Gd, Tb, Dy). The 18‐c‐6 ligands occupy equatorial positions of a distorted sphenocorona geometry, while the charged ligand...
Article
Full-text available
Three 1D nickel coordination polymers (CPs) based on P,P’-diphenylethylenediphosphinic acid and three different bis-pyridine co-ligands, namely 4,4’-bipyridine (bipy), 1,2-bis(4-pyridyl)ethane (bpy-ane) and 1,2-bis(4-pyridyl)ethane (bpy-ene), were prepared in mild hydrothermal conditions from water solutions containing the dissolved reagents. The C...
Article
Full-text available
Three families of tetraoxolene-bridged dinuclear rare earth (RE) complexes have been synthesised and characterised, with general formula [((HB(pz)3)2RE)2(μ-tetraoxolene)] (HB(pz)3(-) = hydrotris(pyrazolyl)borate; tetraoxolene = chloranilate (1-RE), the dianionic form of 2,5-dihydroxy-1,4-benzoquinone (2-RE), or its 3,6-dimethyl analogue (3-RE)). In...
Article
Full-text available
In recent work we have reported the synthesis and physical properties of near-linear Ln(II) (Ln = lanthanide) complexes utilizing the bulky bis(silylamide) {N(Si(i)Pr3)2}. Herein, we synthesize trigonal-planar Ln(II) complexes by employing a smaller bis(silylamide), {N(Si(t)BuMe2)2} (N**), to study the effects of this relatively rare Ln geometry/ox...
Article
Full-text available
Use of molecular electron spins as qubits for quantum computing will depend on the ability to produce molecules with weak but measurable interactions between the qubits. Here we demonstrate use of pulsed EPR spectroscopy to measure the interaction between two inequivalent spins in a hybrid rotaxane molecule.
Article
Full-text available
Use of molecular electron spins as qubits for quantum computing will depend on the ability to produce molecules with weak but measurable interactions between the qubits. Here we demonstrate use of pulsed EPR spectroscopy to measure the interaction between two inequivalent spins in a hybrid rotaxane molecule.
Article
A series of lanthanide complexes bearing organic radical ligands, [Ln(Cp(R))2(bipy·(-))] [Ln = La, Cp(R) = Cp(tt) (1); Ln = Ce, Cp(R) = Cp(tt) (2); Ln = Ce, Cp(R) = Cp″ (3); Ln = Ce, Cp(R) = Cp‴ (4)] [Cp(tt) = {C5H3(t)Bu2-1,3}(-); Cp″ = {C5H3(SiMe3)2-1,3}(-); Cp‴ = {C5H2(SiMe3)3-1,2,4}(-); bipy = 2,2'-bipyridyl], were prepared by reduction of [Ln(C...
Article
The structural, electronic, magnetic and theoretical study of the complex [Co3(HL)2(μ-AcO)2(AcO)2], 1, (HL is the dianion obtained by deprotonation of N,N’-bis(salicylidene)-2-hydroxy-1,3-propanediamine and AcO is acetate) shows that 1 crystallizes with two independent molecules in the asymmetric unit. Each molecule is a trinuclear complex. Both mo...
Article
Full-text available
The Ce(III) hydrotris(3,5-dimethylpyrazolyl)borate complex [Ce(TpMe2)2(κ2-dmpz)] (1) (TpMe2 = {HB(dmpz)3}−; dmpz = 3,5-dimethylpyrazolide) was isolated in fair yield from the reaction of [Ce(I)3(THF)4] with two equivalents of [K(TpMe2)] via the facile decomposition of TpMe2. [Ce(TpMe2)2(bipy)] (2) was synthesized in poor yield by the “one-pot” reac...
Article
Full-text available
Single molecule magnets (SMMs) with one transition metal ion often rely on unusual geometry as a source of magnetically anisotropic ground state. Here we report a cobalt(II) cage complex with a trigonal prism geometry showing single ion magnet behavior with very high Orbach relaxation barrier of 152 cm-1. This, to our knowledge, is the largest repo...
Article
Compounds [Fe3 Ln(tea)2 (dpm)6 ] (Fe3 Ln; Ln= Tb-Yb, H3 tea=triethanolamine, Hdpm=dipivaloylmethane) were synthesized as lanthanide(III)-centered variants of tetrairon(III) single-molecule magnets (Fe4 ) and isolated in crystalline form. Compounds with Ln=Tb-Tm are isomorphous and show crystallographic threefold symmetry. The coordination environme...
Article
Full-text available
Magneto-chiral dichroism (MχD) is a non-reciprocal, i. e. directional, effect observed in magnetised chiral systems featuring an unbalanced absorption of unpolarised light depending on the direction of the magnetisation. Despite the fundamental interest in a phenomenon breaking both parity and time reversal symmetries, MχD is one of the least inves...
Article
Full-text available
The selective replacement of the central iron(III) ion with vanadium(III) in a tetrairon(III) propeller-shaped single-molecule magnet has allowed us to increase the ground spin state from S=5 to S=13/2. As a consequence of the pronounced anisotropy of vanadium(III), the blocking temperature for the magnetization has doubled. Moreover, a significant...
Article
The experimental investigation of the molecular magnetic anisotropy in crystals in which the magnetic centers are symmetry related, but do not have a parallel orientation has been approached by using torque magnetometry. A single crystal of the orthorhombic organometallic Cp*ErCOT [Cp*=pentamethylcyclopentadiene anion (C5Me5−); COT=cyclooctatetraen...
Article
Single-crystal torque magnetometry performed on weakly-coupled polynuclear systems provides access to a complete description of single-site anisotropy tensors. Variable-temperature, variable-field torque magnetometry was used to investigate triiron(iii) complex [Fe3La(tea)2(dpm)6] (), a lanthanum(iii)-centred variant of tetrairon(iii) single molecu...
Article
The [Dy(tta)3(L)] complex behaves as a single ion magnet both in crystalline phase and in solution. Experimental and theoretical magnetic anisotropy axes perfectly match and lie along the most electro-negative atoms of the coordination sphere. Both VSM and MCD measurements highlight the robustness of the complex with the persistence of the memory e...
Article
Angular-resolved single-crystal magnetometry is a key tool to characterise lanthanide-based materials with low symmetry, for which conjectures based on idealised geometries can be totally misleading. Unfortunately the technique is strictly successful only for triclinic structures, thus reducing significantly its application. By collecting out-of-eq...
Article
Full-text available
W-band (ν ≅ 94 GHz) electron paramagnetic resonance (EPR) spectroscopy was used for a single-crystal study of a star-shaped Fe3Cr single-molecule magnet (SMM) with crystallographically imposed trigonal symmetry. The high resolution and sensitivity accessible with W-band EPR allowed us to determine accurately the axial zero-field splitting terms for...
Article
Spotting trends: Upon going from Tb(III) to Yb(III) centers in the complexes of the DOTA(4-) ligand a reorientation of the easy axis of magnetization from perpendicular to parallel to the LnO bond of the apical water molecule is experimentally observed and theoretically predicted. Only ions with an odd number of electrons show slow relaxation of t...
Article
Full-text available
Propeller-like [Fe(4)(L)(2)(dk)(6)] complexes, in which Hdk is a β-diketone and H(3)L is a tripodal alcohol, R-C(CH(2)OH)(3), exhibit tunable magnetic anisotropy barriers and retain their magnetic memory effect when chemically anchored on metal surfaces. Heteronuclear analogues of these M(4) complexes have been sought to afford a library of compoun...
Article
Einem molekularen Schraubstock ähnelt der violette Bis(tert-butylscorpionat)-Eisen(II)-Komplex, der bei Raumtemperatur trotz des sterischen Einflusses von sechs Methylgruppen am Moleküläquator vollständig im Low-Spin-Zustand vorliegt. Die sperrigen tert-Butylsubstituenten an den Molekülenden wirken wie Feststellschrauben, die die bevorzugte Bildung...
Article
Full-text available
Chitosan membranes were subjected to a pre-treatment in a double diffusion system, with a calcium solution in one chamber and a phosphate solution in the other chamber. Both chambers were separated by the chitosan membrane and subject to three mineralization periods (5, 10 and 15 minutes). After this pre-treatment the bioactivity of the different c...
Article
Full-text available
Chitosan membranes were subjected to a pre-treatment in a double diffusion system, with a calcium solution in one chamber and a phosphate solution in the other chamber. Both chambers were separated by the chitosan membrane and subject to three mineralization periods (5, 10 and 15 minutes). After this pre-treatment the bioactivity of the different c...
Article
A series of oxygen deficient perovskites Sr0.8Y0.2Co1−xFexO3−δ, has been prepared by solid state reaction in close ampoules. The structural study by transmission electron microscopy reveals the existence of extra reflection peaks resulting from ordering phenomenon of the oxygen anions. For x=0.5x=0.5 this implies a modulated structure characterized...

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