A water-soluble polyphosphorhydrazone Janus dendrimer built by "click" chemistry as support for Ru-complexes in catalysis
Cejas-Sánchez, Joel (Universitat Autònoma de Barcelona. Departament de Química)
Caminade, Anne-Marie (Université de Toulouse)
Kajetanowicz, Anna (University of Warsaw. Biological and Chemical Research Centre)
Grela, Karol (University of Warsaw. Biological and Chemical Research Centre)
Sebastián Pérez, Rosa Maria (Universitat Autònoma de Barcelona. Departament de Química)

Data:	2024
Resum:	The field of supported catalysis has experienced increased attention with respect to the development of novel architectures for immobilizing catalytic species, aiming to maintain or enhance their activity while facilitating the easy recovery and reuse of the active moiety. Dendrimers have been identified as promising candidates capable of imparting such properties to catalysts through selective functionalization. The present study details the synthesis of two polyphosphorhydrazone (PPH) dendrons, each incorporating azide or acetylene groups at the core for subsequent coupling through "click" triazole chemistry. Employing this methodology, a novel PPH Janus dendrimer was successfully synthesized, featuring ten polyethylene glycol (PEG) chains on one side of the structure and ten Ru(p-cymene) derivatives on the other. This design was intended to confer dual properties, influencing solubility modulation, and allowing the presence of active catalytic moieties. The synthesized dendrimer underwent testing in the isomerization of allyl alcohols in organic solvents and biphasic solvent mixtures. The results demonstrated a positive dendritic effect compared with model monometallic and bimetallic species, providing a proof-of-concept for the first PPH Janus dendrimer with tested applications in catalysis.
Nota:	Altres ajuts: acords transformatius de la UAB
Nota:	European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 860322 for the ITN-EJD "Coordination Chemistry Inspires Molecular Catalysis" (CCIMC)
Nota:	Generalitat de Catalunya (2021 SGR 00064 and 2021 SGR 00122)
Nota:	Ministerio de Ciencia, Innovación y Universidades (PID2019-106171RB-I00 and PID2020-116844RB-C21)
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Phosphorus Janus dendrimers ; Dendrons ; 31P{1H} NMR ; Click chemistry ; Water solubility ; Catalysis ; Ruthenium
Publicat a:	Dalton transactions, 7 Maig 2024, p. 1-13, ISSN 1477-9234

DOI: 10.1039/D3DT04376B

14 p, 3.1 MB

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