title: Eu@COK-16, a host sensitized, hybrid luminescent metal-organic framework.
abstract: A new concept of luminescent host-guest materials was developed by introduction of Eu(3+) into COK-16, a HKUST-1 type hybrid metal-organic framework (MOF) with cation exchange properties. In Eu@COK-16, the luminescent ion resides in the pore system of the MOF. The luminescence properties of Eu@COK-16 have been studied based on excitation and emission, allowing analysis of intramolecular energy-transfer processes from the COK-16 host to the exchanged Eu(3+) ions. Both the framework trimesate (BTC) and encapsulated [PW12O40](3-) ions contribute to energy transfer. Since the antenna molecules (BTC) are part of the framework structure and [PW12O40](3-) ions only partly occupy one of the three types of cavities in the structure, a large fraction of the pore volume in this host sensitized luminescent MOF remains available for catalysis applications or adsorption of additional sensitizing molecules. The material structure was determined from a combination of elemental analysis, XAS, XRD, electron and luminescence spectroscopy.
authors.affiliation: Departamento de Química Fundamental, Instituto de Química da Universidade de São Paulo, 05508-900, São Paulo, SP, Brazil. dmustafa@iq.usp.br.
authors.forename: D
authors.initials: D
authors.lastname: Mustafa
authors.forename: I G N
authors.initials: IG
authors.lastname: Silva
authors.forename: S R
authors.initials: SR
authors.lastname: Bajpe
authors.forename: J A
authors.initials: JA
authors.lastname: Martens
authors.forename: C E A
authors.initials: CE
authors.lastname: Kirschhock
authors.forename: E
authors.initials: E
authors.lastname: Breynaert
authors.forename: H F
authors.initials: HF
authors.lastname: Brito