One-pot synthesis of {Mo₆ I₈ }⁴⁺ -doped polystyrene microspheres via a free radical dispersion copolymerisation reaction

Abstract

Molybdenum octahedral clusters, when incorporated into an appropriate polymer matrix, are considered as promising agents for a range of biological applications. This work describes the one-pot synthesis, morphology and cellular toxicity of nano-sized polystyrene beads doped with luminescent cluster complexes [{Mo 6 X 8 }(NO 3 ) 6 ] 2− (X = Cl, Br or I). Specifically, the particles were obtained by free radical dispersion copolymerisation of styrene and methacrylic acid or 4-vinylpyridine in the presence of the cluster complexes. The effects of the cluster loading in the reaction mixture on both the content of the final material and number-average molar mass of the copolymers were evaluated.

Photoactive Hexanuclear Molybdenum Nanoclusters Embedded in Molecular Organogels

“…(1-trimethylsilyl-1-propyne), 19 polyurethane, 12,20 silicone, 21,22 amorphous carbon, 23 polymethylmethacrylate, [24][25][26][27] poly(D,L-lactide-co-glycolide), 28 polymeric hydrogel nanoparticles 29 polystyrene, [30][31][32][33][34][35] SiO2 8, [36][37][38][39][40] and ZnO. 8,41 Some of these materials have proved useful for technological applications such as solid state emission, 8, 25,41 oxygen sensing, 19,20 time-gated bioimaging, 39 photochemical oxygenations 2,31,33,34,37 and photodynamic therapy (both anticancer 28,38,40,42 and antibacterial 31,34 ).…”

Luminescent silica mesoparticles for protein transduction

“…S1), as a particularly handy precursor for a range of luminescent materials. [33][34][35][36][37] Specifically, we showed that red emitting mono-disperse SNPs and SMPs that have sizes of 50 nm and 500 nm, respectively, can be easily prepared via slightly modified Stöber process in a one-step reaction. 35 In this process tetraethyl orthosilicate (TEOS) is hydrolysed by ammonia in the presence of the cluster.…”

Hexamolybdenum Clusters Supported on Exfoliated h-BN Nanosheets for Photocatalytic Water Purification

“…On the basis of our broad experience with octahedral transition-metal cluster complexes, particularly, molybdenum clusters [{Mo 6 X 8 }­L 6 ] n (X = Cl, Br, or I; L = organic or inorganic ligands; Figure ), − we suggest considering them as promising agents for photocatalytic water purification. Their variable terminal ligand (L) environment provides for chemical reactivity and solubility, while the highly stable cluster core {Mo 6 X 8 } 4+ is responsible for the photophysical properties, i.e., photoluminescence − and the ability to generate reactive oxygen species (ROS), such as singlet oxygen, hydroxyl radical, superoxide radical, etc. ,,− Owing to these beneficial characteristics, this class of compounds is already well-studied for numerous applications, including as components of optical waveguides, liquid-crystal devices, solar panels, antibacterial materials, , agents for bioimaging , and photodynamic therapy, ,,,, and catalysts. − However, the water treatment processes employing hexamolybdenum cluster complexes remain little explored.…”

“…However, a simple two-component system containing a cluster and a support for heterogeneous photocatalysis has not been described. At the same time, cluster complexes have been often combined with various matrixes beyond graphene oxide, ,, such as MIL-101 9 and SiO 2 meso- and nanoparticles, − ,,− polystyrene, ,,,,, polyurethane, poly­(methyl methacrylate), ,− and poly­(vinylpyrrolidone) …”