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Supramolecular tripodal Au(I) assemblies in water. Interactions with pyrene fluorescent probe
Pinto, Andrea (Universitat de Barcelona. Departament de Química Inorgànica i Orgànica)
Hernández, Guillem (Universitat de Barcelona. Departament de Química Inorgànica i Orgànica)
Gavara, Raquel (Universitat de Barcelona. Departament de Química Inorgànica i Orgànica)
Aguiló, Elisabet (Universitat de Barcelona. Departament de Química Inorgànica i Orgànica)
Moro, Artur J. (Universidade Nova de Lisboa)
Aullón, Gabriel (Universitat de Barcelona. Departament de Química Inorgànica i Orgànica)
Malfois, Marc (ALBA Laboratori de Llum de Sincrotró)
Lima, João Carlos (Universidade Nova de Lisboa)
Rodríguez, Laura (Universitat de Barcelona. Departament de Química Inorgànica i Orgànica)

Date: 2019
Abstract: The synthesis of three gold(I) tripodal complexes derived from tripropargylamine and containing the water soluble phosphines PTA (1, 3,5-triaza-7-phosphaadamantane), DAPTA (3,7-diacetyl-1,3,7-triaza--phosphabicyclo[3. 3. 1]nonane) and TPPTS (triphenylphosfine-3,3',3''-trisulfonic acid trisodium salt) is here described. The three complexes are observed to give rise to the formation of supramolecular aggregates in water and very long fibers. This property has been analyzed by means of 1H-NMR spectroscopy at different concentrations and SAXS. The results point out the important role of the phosphine moieties as the main enthalpic or entropic contribution in the resulting Gibbs energy of aggregates formation. The tripodal structure of the three complexes together with the presence of gold(I) atoms make them ideal candidates to interact with hydrophobic molecules also in water. For this, the interaction with pyrene in this solvent has been evaluated with successful results in all three complexes. The highest association constant corresponds to 2 as the host. DFT studies indicates the location of pyrene in the tripodal cavity as the most stable conformation. The interaction with pyrene has been additionally studied within cholate hydrogel matrixes pointing out the stability of the resulting host:guest adducts in the different medium.
Note: Número d'acord de subvenció MINECO/CTQ2016-76120-P
Note: Número d'acord de subvenció MINECO/MDM-2017-0767
Rights: Tots els drets reservats
Language: Anglès.
Document: article ; recerca ; acceptedVersion
Subject: Gold(I) ; Tripodal ; Hydrogels ; Luminescence ; Pyrene
Published in: New Journal of Chemistry, Vol. 43, Issue 21 (June 2019) , p. 8279-8289, ISSN 1144-0546

DOI: 10.1039/c9nj00469f


Available from: 2020-06-30
Postprint

The record appears in these collections:
Articles > Research articles
Articles > Published articles

 Record created 2019-05-02, last modified 2019-07-21



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