The abilities of two naphthalimide derivatives with a methacryloyl group to initiate, when incorporated in multi-component systems, a ring-opening polymerization of epoxides and a radical polymerization of acrylates under different irradiation sources (e.g. very soft halogen lamp irradiation, laser diode at 457 nm, laser diode at 405 nm and blue LED bulb at 462 nm) have been investigated. One of them is particularly efficient for the cationic and radical photopolymerization of an epoxide/acrylate blend in a one-step hybrid cure and leads to the formation of an interpenetrated polymer network IPN (30 s for getting tack free coatings). The migration stability of one of these naphthalimide derivatives is found to be excellent in the cured polyacrylates and IPNs. The photochemical mechanisms are studied by steady state photolysis, fluorescence, cyclic voltammetry, electron spin resonance spin trapping and laser flash photolysis techniques.

A thiol-modified version of the porous metal organic framework MIL-53 is synthesised in a single step using the functionalised linker precursor 2,5-dithiol-1,4-benzenedicarboxylic acid and aluminium as the framework metal. Careful washing is needed to remove unreacted and dimerised linker from the material after synthesis, but once performed profile fitting of powder X-ray diffraction shows that thiol-modified MIL-53(Al) presents a closed, narrow-pore, structure with unit cell volume ∼1103 ų (space group C2/c). The presence of intact thiol groups is confirmed using sulfur K-edge XANES spectroscopy and IR spectroscopy, while nitrogen BET surface area analysis and krypton and xenon adsorption isotherms reveal the porosity of the material. The thiol-modified solid is capable of iodine adsorption from the vapour phase and from solution and an equilibrium uptake of ∼325 mg per g is reached, which is higher than other reported modified forms of MIL-53. Infrared spectroscopy shows the disappearance of the S–H stretch after iodine adsorption, while sulfur K-edge XANES shows a complex spectrum, consistent with the formation of sulfenyl iodide but also oxidation of some sulfur to disulfide having occurred. We therefore propose that formation of covalent S–I bonds allows the sequestration of iodine by the porous solid, but that a proportion of the thiol groups are also in close enough proximity for the formation of disulfide links.