Stabilization of Octahedral Metal Halide Clusters by Host–Guest Complexation with γ-Cyclodextrin: Toward Nontoxic Luminescent Compounds - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Inorganic Chemistry Année : 2022

Stabilization of Octahedral Metal Halide Clusters by Host–Guest Complexation with γ-Cyclodextrin: Toward Nontoxic Luminescent Compounds

Résumé

γ-cyclodextrin (γ-CD) interacts in aqueous solution with octahedral halide clusters Na 2 [{M 6 X 8 }Cl 6 ] (M = Mo, W; X = Br, I) to form robust inclusion supramolecular complexes [{M 6 X 8 }Cl 6 @2γ-CD] 2-. Single crystal X-ray diffraction analyses revealed two conformational organizations within the adduct depending on the nature of the inner halide X within the {M 6 X 8 } core. Using 35 Cl NMR and UV-vis as complementary techniques, the kinetics of the hydrolysis process were shown to increase with the following order: {W 6 I 8 } < {W 6 Br 8 } ≈ {Mo 6 I 8 } < {Mo 6 Br 8 }. The complexation with γ-CD enhances drastically the hydrolytic stability of luminescent [{M 6 X 8 }Cl 6 ] 2cluster-based units, which was quantitatively proved by the same techniques. The resulting host-guest complexation provides a protective shell against contact with water and offers promising horizons for octahedral clusters in biology as revealed by the low dark cytotoxicity and cellular uptake.
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Dates et versions

hal-03774212 , version 1 (09-09-2022)

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Anton Ivanov, Mohamed Haouas, Darya Evtushok, Tatiana Pozmogova, Tatiana Golubeva, et al.. Stabilization of Octahedral Metal Halide Clusters by Host–Guest Complexation with γ-Cyclodextrin: Toward Nontoxic Luminescent Compounds. Inorganic Chemistry, 2022, 61 (36), pp.14462-14469. ⟨10.1021/acs.inorgchem.2c02468⟩. ⟨hal-03774212⟩
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