Thermally-Induced Spin Crossover and LIESST Effect in the Neutral [FeII(Mebik)2(NCX)2] Complexes: Variable-Temperature Structural, Magnetic, and Optical Studies (X = S, Se; Mebik = bis(1-methylimidazol-2-yl)ketone)

Autor: Siddhartha De, Lise-Marie Chamoreau, Hasnaa El Said, Yanling Li, Alexandrine Flambard, Marie-Laure Boillot, Subrata Tewary, Gopalan Rajaraman, Rodrigue Lescouëzec

Publikováno v: Frontiers in Chemistry, Vol 6 (2018)

Two new iron(II) neutral complexes of bis(1-methylimidazol-2-yl)ketone (Mebik) with molecular formula [FeII(Mebik)2(NCS)2] (1) and [FeII(Mebik)2(NCSe)2] (2) have been synthesized and characterized by magnetic measurements, single-crystal X-ray diffra

Externí odkaz: https://doaj.org/article/c75fedfba6e748a1815442725da70196

Probing the Local Magnetic Structure of the [Fe III (Tp)(CN) 3 ] − Building Block Via Solid‐State NMR Spectroscopy, Polarized Neutron Diffraction, and First‐Principle Calculations

Autor: Patrick Herson, Alexandrine Flambard, Rodrigue Lescouëzec, Siddhartha De, Boris Le Guennic, Frank H. Köhler, Karine Costuas, Béatrice Gillon, Frédéric Gendron, Delphine Garnier, Abhishake Mondal

Publikováno v: Chemistry – A European Journal. 25:12120-12136

The local magnetic structure in the [FeIII (Tp)(CN)3 ]- building block was investigated by combining paramagnetic Nuclear Magnetic Resonance (pNMR) spectroscopy and polarized neutron diffraction (PND) with first-principle calculations. The use of the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2bcbaaa935bc66d01002e1c35193cc0c
https://doi.org/10.1002/chem.201902239

Thermo and Electro-Switchable Cs⊂{Fe 4 -Fe 4 } Cubic Cage: Spin-Transition and Electrochromism

Autor: Lise-Marie Chamoreau, Azzedine Bousseksou, Jana Glatz, Jean-Francois Meunier, Alexandrine Flambard, Rodrigue Lescouëzec

Publikováno v: Chemical Communications
Chemical Communications, 2020, 56 (74), pp.10950-10953. ⟨10.1039/D0CC04279J⟩
Chemical Communications, Royal Society of Chemistry, 2020, 56 (74), pp.10950-10953. ⟨10.1039/D0CC04279J⟩

International audience; A mixed valence Cs⊂{Fe 4-Fe 4 } cyanido-cube was synthesized and structurally characterized. The molecule, which is robust in solution, shows a remarkable electronic versatility. Electrochromic properties associated with nin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::deaab54c5364c72d4e291374af170d33
https://hal.science/hal-02948032

Probing the local structure of Prussian blue electrodes by 113Cd NMR spectroscopy

Autor: Masashi Okubo, Alexandrine Flambard, Akira Sugahara, Atsuo Yamada, S De, Rodrigue Lescouëzec

Publikováno v: Dalton Transactions
Dalton Transactions, 2017, 46 (19), pp.6159-6162. ⟨10.1039/C7DT00728K⟩
Dalton Transactions, Royal Society of Chemistry, 2017, 46 (19), pp.6159-6162. ⟨10.1039/C7DT00728K⟩

International audience; We demonstrate that 113Cd NMR is a potent technique to monitor the local electronic and structural states of the Prussian blue electrode during Li+ intercalation, providing an atomic-scale insight into the reaction mechanism.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d65a048e9e9b39810ec673637935b24c
https://doi.org/10.1039/c7dt00728k

One synthesis: two redox states. Temperature-oriented crystallization of a charge transfer {Fe2Co2} square complex in a {FeIILSCoIIILS}2 diamagnetic or {FeIIILSCoIIHS}2 paramagnetic state

Autor: Yanling Li, Siddhartha De, Alexandrine Flambard, Azzedine Bousseksou, Juan-Ramón Jiménez, Lise-Marie Chamoreau, Rodrigue Lescouëzec, Yves Journaux

Publikováno v: RSC Advances. 6:17456-17459

The reaction of [FeIII(Tp)(CN)3]− with [CoII(vbik)2(S)2]2+ leads selectively to the crystallization of cyanide-bridged diamagnetic {FeIILSCoIIILS}2 squares at 5 °C or paramagnetic {FeIIILSCoIIHS}2 ones at 35 °C. The diamagnetic crystal phase can

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d97539f1799a42fd93512b253feac717
https://doi.org/10.1039/c6ra00191b