Afficher la notice abrégée

Study of the photo-switching of a Fe(II) chiral complex through linear and nonlinear ultrafast spectroscopy

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorHAMOUDA, Amine
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorDUTIN, Fredéric
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorDEGERT, Jerome
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorTONDUSSON, Marc
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorNAÏM, Ahmad
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROSA, Patrick
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorFREYSZ, Eric
dc.date.created2019-07
dc.date.issued2019-07
dc.identifier.issn1948-7185
dc.description.abstractEnPhoto-switching the physical properties of molecular systems opens large possibilities for driving materials far from equilibrium toward new states. Moreover, ultra-short pulses of light make it possible to induce and to record photo-switching on a very short time-scale, opening the way to fascinating new functionalities. Among molecular materials, Fe(II) complexes exhibit an ultrafast spin-state transition during which the spin state of the complex switches from a low spin state (LS, S=0) to a high spin state (HS, S=2). The latter process is remarkable: it takes place within ~100 fs with a quantum efficiency of ~100%. Moreover, the spin state switching induces an important shift of the broad metal to ligand absorption band of the complex and it results in large modifications of the physical and chemical properties of the compounds. But, because most of the Fe(II) complexes crystallize in centrosymmetric space groups, this prevents them from exhibiting piezoelectric, ferroelectric as well as second-order nonlinear optical properties such as second harmonic generation (SHG). This considerably limits their potential applications. We have recently synthesized [Fe(phen)3] [Δ-As2(tartrate)2] chiral complexes that crystallize in a noncentrosymmetric 32 space group. Hereafter, upon the excitation of a thin film of these complexes by a femtosecond laser pulse and performing simultaneously transient absorption (TRA) and time-resolved SHG (TRSH) measurements, we have recorded the ultrafast LS to HS switching. Whereas a single TRA measurement only gives partial information, we demonstrate that TRSH readily reveals the different mechanisms in play during the HS to LS state relaxation. Moreover, a simple model makes it possible to evaluate the relaxation times as well as the hyperpolarizabilities of the different excited states through which the system travels during the spin-state transition
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enTime resolved spectroscopy
dc.subject.enNonlinear Optics
dc.subject.enPhotoswitching of a chiral material
dc.subject.enLaser induced spin manipulation
dc.title.enStudy of the photo-switching of a Fe(II) chiral complex through linear and nonlinear ultrafast spectroscopy
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.jpclett.9b01946
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
dc.subject.halSciences de l'ingénieur [physics]/Optique / photonique
dc.subject.halSciences de l'ingénieur [physics]/Matériaux
dc.subject.halChimie/Chimie de coordination
dc.identifier.arxiv1910.00259
bordeaux.journalJournal of Physical Chemistry Letters
bordeaux.page5975-5982
bordeaux.volume10
bordeaux.issue19
bordeaux.peerReviewedoui
hal.identifierhal-02294329
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02294329v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Physical%20Chemistry%20Letters&rft.date=2019-07&rft.volume=10&rft.issue=19&rft.spage=5975-5982&rft.epage=5975-5982&rft.eissn=1948-7185&rft.issn=1948-7185&rft.au=HAMOUDA,%20Amine&DUTIN,%20Fred%C3%A9ric&DEGERT,%20Jerome&TONDUSSON,%20Marc&NA%C3%8FM,%20Ahmad&rft.genre=article


Fichier(s) constituant ce document

FichiersTailleFormatVue

Il n'y a pas de fichiers associés à ce document.

Ce document figure dans la(les) collection(s) suivante(s)

Afficher la notice abrégée