Organometallic derivatives of helicenes: impact of the metal center on the chiroptical properties.
type: Dataset
description: New organometallic derivatives of helicenes containing platinum and ruthenium centers have been prepared and theirs chiroptical properties have been studied. In the first chapter, we sum up most of works based on helicene chemistry that have been reported since 60 years and in particular the original properties of these helical π-conjugated molecules. We also describe some applications where we can find helicenes. The second chapter is focused on the description on a new family of helicenes, the platinahelicenes. Platinahelicenes are phosphorescent at room temperature thanks to the orthoplatinated cycle. The synthesis, the photophysical and chiroptical properties of five platinahélicènes are reported in this chapter. In the third chapter, we describe the evolution of photophysical and chiroptical properties of platinahelicenes when we change the oxidation state or/and the ligand of the platinum center. We also report the heterochiral and homochiral assembly of two platina[6]helicenes. Isomerisation of the heterochiral assembly to the homochiral one has been studied. The last chapter deals with the hydroruthenation of ethynyl-helicene and diethynyl-helicene. Two complexes of ruthenium-vinyl-helicene have been obtained and their photophysical, chiroptical and electrochemical properties have been studied. Proof of the redox-triggered chiroptical switching ability of these complexes are reported in this chapter.
identifier: NNT: 2012REN1S061
issued: 2026-05-30T12:53:38.154890
language: fr
modified: 2026-05-30T12:53:38.154899
contact point: Organization
  fn: CCSD
keyword: chimorgachemical-sciencesorganic-chemistry
keyword: chiralite
keyword: chirality
keyword: helicenes
keyword: infoeu-reposemanticsdoctoralthesis
keyword: interrupteur-moleculaire
keyword: molecular-switch
keyword: organometallics
keyword: organometallique
keyword: photophysics
keyword: photophysique
keyword: pi-conjugated-system
keyword: platine
keyword: ruthenium
keyword: systemes--conjugue
keyword: theses
landing page: https://theses.hal.science/tel-00766382

Organometallic derivatives of helicenes: impact of the metal center on the chiroptical properties.
type: Distribution
format: HTML
issued: 2026-05-30T12:53:38.314410
modified: 2026-05-30T12:53:38.103823
access URL: https://theses.hal.science/tel-00766382

test_moissonnage_selune
type: Agent