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Controlling the Emission of Blue-Emitting Complexes by Encapsulation within Zeolite Cavities

2004; American Chemical Society; Volume: 16; Issue: 7 Linguagem: Inglês

10.1021/cm0347640

1520-5002

Avelino Corma, Urbano Díaz, Belén Ferrer, Vicente Fornés, María S. Galletero, Hermenegildo Garcı́a,

Metal-Organic Frameworks: Synthesis and Applications

Blue light-emitting boron 8-hydroxyquinolinate and 8-hydroxyquinaldinate complexes have been formed inside boron zeolites Beta, MCM-22, and ferrierite, and on layered ITQ-2 and ITQ-6 zeolites starting from the corresponding ligands and boron dislodged from framework positions. The luminescence properties, i.e., emission intensity, maximum wavelength, and lifetime of the ship-in-a-bottle quinolinate complexes are strongly modulated by the zeolite host. Besides the species responsible for the photoluminescence, other longer-lived transient species, presumably related to electron transport, are also photochemically generated and have been detected by laser flash photolysis.