Multifunctionalized Mesostructured Silica Nanoparticles Containing Mn2 Complex for Improved Catalase-Mimicking Activity in Water

Tristan Pelluau (1) , Saad Sene (1) , Beltzane Garcia-Cirera (2) , Belen Albela (2, 3) , Laurent Bonneviot (2) , Joulia Larionova (1) , Yannick Guari (1)

1 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
2 LC - Laboratoire de Chimie - UMR5182
3 Shanghai Key Laboratory of Green Chemistry and Chemical Processes

We report the synthesis of a hybrid nanocatalyst obtained through the immobilization of bio-inspired [{Mn(bpy)(H2O)}(µ-2-MeC6H4COO)2(µ-O){Mn(bpy)(NO3)}]NO3 compound into functionalized, monodispersed, mesoporous silica nanoparticles. The in situ dual functionalization sol–gel strategy adopted here leads to the synthesis of raspberry-shaped silica nanoparticles of ca. 72 nm with a large open porosity with preferential localization of 1,4-pyridine within the pores and sulfobetaine zwitterion on the nanoparticles’ periphery. These nano-objects exhibit improved catalase-mimicking activity in water thanks to the encapsulation/immobilization of the catalytic active complex and high colloidal stability in water, as demonstrated through the dismutation reaction of hydrogen peroxide.

Mots clés: Catalase; Catalytic activity; Dendritic silica; Manganese compounds; Mesostructured silica; Nanoparticle

Domaines: Chimie

Tristan Pelluau, Saad Sene, Beltzane Garcia-Cirera, Belen Albela, Laurent Bonneviot, et al.. Multifunctionalized Mesostructured Silica Nanoparticles Containing Mn2 Complex for Improved Catalase-Mimicking Activity in Water. Nanomaterials, 2022, 12 (7), pp.1136. ⟨10.3390/nano12071136⟩. ⟨hal-03649298⟩