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-. Aco and K. , Il s'agit des premières expériences FZRET réalisées en solution. Ces expériences ont permis d'acquérir le premier signal FZRET produit entre deux solutés en solution. Ces résultats ont ainsi démontré la capacité de la technique FZRET à détecter l'appariement des ions. De plus, la distribution de distances cation-anion au sein des paires d'ions de contact [AcO -,K + ] a pu être estimée grâce au déplacement observé sur le signal FZRET. Malgré l'écart constaté entre cette distance estimée expérimentalement et les distributions de distances déterminées par les simulations réalisées avec un champ de force polarisable couplé à une méthode globale de recherche des minima, ces premiers résultats sont encourageants. Cette technique FZRET permet d'étudier de manière assez directe les appariements d'ions en solution. Toutefois, une amélioration du modèle employé pour déterminer la distribution de distances cation-anion est indispensable pour extraire une information quantitative de la même qualité que l'approche théorique. Afin d'améliorer ce modèle, il est nécessaire d'obtenir plus de données, c'est pourquoi de nouvelles expériences seront réalisées prochainement sur un autre système, Ce travail s'est alors poursuivi par l'étude des paires d'ions d'acétate de potassium

, Toutefois, aucune méthode expérimentale ou théorique ne suffit, par elle-même, à identifier précisément les paires d'ions en solution. Cette étude montre que lorsque les techniques spectroscopiques sont couplées à des approches théoriques adaptées, elles permettent d'identifier les conformations des structures supramoléculaires formées dans les solutions électrolytiques. À court terme, ces techniques pourront être appliquées à d'autres systèmes d'intérêt biologique, tels que les paires d'ions formées par un ion phosphate, ces résultats démontrent que les outils spectroscopiques (IR, rayons X) sont adaptés à l'étude de l'appariement d'ions en solution

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