Multifunctional Anthracene-Based Ni-MOF with Encapsulated Fullerenes: Polarized Fluorescence Emission and Selective Separation of C 70 from C 60

Serhii Vasylevskyi (1) , Guillaume Raffy (2, 3) , Stefan Salentinig (2) , André del Guerzo (2) , Katharina Fromm (1) , Dario Bassani (2)

1 UNIFR - Université de Fribourg = University of Fribourg
2 UB - Université de Bordeaux
3 ISM - Institut des Sciences Moléculaires

We report an anthracene-based Ni-MOF (Ni(II) metal-organic framework, {[Ni(µ 2-L) 2 Cl 2 ]•x(C 6 H 6)•y(MeOH)} n (1), L = anthracene-9,10-diylbis(methylene)diisonicotinate) whose crystal structure reveals the presence of hexagonal channels with a pore size of 1.4 nm that can accommodate guests such as C 60 and C 70. Both confocal fluorescence and Raman microscopy results are in agreement with a homogeneous distribution of fullerenes throughout the single crystals of 1. Efficient energy transfer from 1 to the fullerenes was observed, which emitted partially polarized fluorescence emission. Stronger binding between 1 and C 70 vs. C 60 was confirmed from HPLC analysis of the dissolved material and provides a basis for the selective retention of C 70 in liquid chromatography columns packed with 1.

Mots clés: Metal-organic frameworks (MOFs); self-assembly Ni-MOFs; fullerenes encapsulation; C 60 /C 70 separation; energy transfer; polarized emission

Domaines: Chimie

Serhii Vasylevskyi, Guillaume Raffy, Stefan Salentinig, André del Guerzo, Katharina Fromm, et al.. Multifunctional Anthracene-Based Ni-MOF with Encapsulated Fullerenes: Polarized Fluorescence Emission and Selective Separation of C 70 from C 60. ACS Applied Materials & Interfaces, 2022, 14 (1), pp.1397-1403. ⟨10.1021/acsami.1c19141⟩. ⟨hal-03853623⟩