Mechanoluminescence and aggregation-enhanced emission (AEE) of an In-MOF based on a 9,9′-diphenyl-9H-fluorene tetraacid linker

Mechanical grinding of an In-MOF constructed from a conformationally-flexible tetraacid linker leads to remarkable aggregation-enhanced emission of MOF particles; a suspension of the latter in an aqueous medium permits sensing of Al³⁺ ions.