title: Enhanced phosphorescence emission by incorporating aromatic halides into an entangled coordination framework based on naphthalenediimide.
abstract: Phosphorescence emission at room temperature is turned on in an entangled porous coordination polymer (PCP) with naphthalenediimide (NDI) as chromophore, by incorporating halogenated guests into the pores. The phosphorescent efficiency is drastically increased by the incorporation of aromatic halide guests in comparison with the incorporation of nonaromatic derivatives. Aromatic halide guests trigger a structural transformation, which allows a strong interaction with the NDI ligand in the framework through charge-transfer complexation, and provides an extra population process of the triplet state. The long-lived photoinduced triplet states, with an emission wavelength in the red region of the visible spectrum, demonstrated by this PCP, may open the door for potential uses, for example, as singlet-oxygen generators or for bio-imaging applications.
authors: Dpto. Química Física, Universidad del País Vasco (UPV/EHU), Aptdo. 644, 48080 Bilbao (Spain). virginia.martinez@ehu.es.
authors: Virginia
authors: V
authors: Martínez-Martínez
authors: Rebeca
authors: R
authors: Sola Llano
authors: Shuhei
authors: S
authors: Furukawa
authors: Yohei
authors: Y
authors: Takashima
authors: Iñigo
authors: I
authors: López Arbeloa
authors: Susumu
authors: S
authors: Kitagawa
keywords: halide aromatic guests; host-guest systems; luminescence; naphthalenediimide; porous coordination polymer