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Optimized local synthetic conditions induce size reduction and phase purification in {[Fe(Htrz)2(trz)](BF4)}n spin crossover particles

hal.structure.identifierInstitut des Sciences Chimiques de Rennes [ISCR]
dc.contributor.authorCASTEL, Tristan
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARCHETTI, Anaïs
hal.structure.identifierInstitut des Sciences Chimiques de Rennes [ISCR]
dc.contributor.authorHOUARD, Felix
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDARO, Nathalie
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARCHIVIE, Mathieu
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorCHASTANET, Guillaume
hal.structure.identifierInstitut des Sciences Chimiques de Rennes [ISCR]
hal.structure.identifierInstitut universitaire de France [IUF]
dc.contributor.authorBERNOT, Kevin
dc.date.issued2023
dc.identifier.issn1528-7483
dc.description.abstractEnThe well-known synthesis of the two polymorphs of the {[Fe(Htrz)2(trz)](BF4)}n spin crossover coordination polymer is explored with new template-free methods that allow a control over the local synthetic conditions. A “one-pot” synthesis approach is developed, in which the solid reactants are mixed together before the addition of the solvent, which is expected to generate instantaneous supersaturation conditions favoring the nucleation of particles over their growth. In a second method, the addition of ultrasound pulses promotes the appearance of local “hot spots” that affect the local temperature and allow exploring a different region of the concentration–temperature phase diagram, leading to an increase in the phase purity of the product. These two syntheses are compared to the classical method in which the reactants are first dissolved in separate solutions before being mixed. The use of a one-pot synthesis, with or without ultrasound pulses, induces a downsizing of the particle size by a factor of 500 on their volume. The addition of ultrasound pulses allows moving from a mixture of polymorphs I and II of this compound to the pure phase I. These approaches open the way to more studies on the control over the size or phase purity in such molecular compounds, without the use of any surfactant.
dc.description.sponsorshipChimie en flux continu pour la synthèse de particules commutables à température ambiante
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.subject.enChemical synthesis
dc.subject.enGranular materials
dc.subject.enMixtures
dc.subject.enNanoparticles
dc.subject.enTransmission electron microscopy
dc.title.enOptimized local synthetic conditions induce size reduction and phase purification in {[Fe(Htrz)2(trz)](BF4)}n spin crossover particles
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.cgd.2c01237
dc.subject.halChimie/Matériaux
bordeaux.journalCrystal Growth & Design
bordeaux.page1076-1083
bordeaux.volume23
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-03945807
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03945807v1
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