Sammelbandbeitrag

Autorenliste: Müller-Buschbaum, Klaus

Erschienen in: The chemistry of metal-organic frameworks : synthesis, characterization, and applications. Volume 1

Herausgeberliste: Kaskel, Stefan

Jahr der Veröffentlichung: 2016

Seiten: 231-270

ISBN: 978-3-527-33874-0

eISBN: 978-3-527-69307-8

DOI Link: https://doi.org/10.1002/9783527693078.ch9

Abstract: 

The combination of chemical and physical properties of the group 3 metals and the series of the lanthanides opens a field for metal–organic frameworks (MOFs) that is unparalleled among MOFs in matters of metal‐based luminescence (the emission of light upon excitation). The vast majority of these lanthanide‐containing metal–organic frameworks (Ln‐MOFs) are carboxylates, which are favored by the high oxophilicity of these metals that dominates their chemical behavior. Other linkers such as N donors are less frequently used. An important difference to typical 3d transition metal cations is the large coordinative demand of Ln ions due to large ionic radii. Accordingly, the coordination numbers of lanthanide and group 3 ions as well as the connectivity of the frameworks are usually substantially larger, therefore being a limiting factor for porosity. The filling of the electron 4f shell along the lanthanide series signifies a characteristic of the periodic table also for MOFs. Due to the core‐close character of these electrons, the elements show an almost similar chemistry with few exceptions. Nonetheless, these 4f electrons give distinction to the physical properties, especially the photophysics of the metal ions constituting the MOF structures. Element‐specific 4f–4f transitions are widely used for luminescence of MOFs and cover a range from the ultraviolet (UV) to the infrared (IR) region. As these processes can be positively influenced and sensitized by the MOF linkers, lanthanide‐containing Ln‐MOFs are the predominant class of MOFs with metal‐based luminescence. They also play a major role for MOF sensing of chemical species or parameters like temperature, as the interaction of a molecule/ion captured by the porous framework or a parameter change can specifically influence the luminescence and thereby offers an easy observable parameter for a fast and novel sensing.

Harvard-Zitierstil: Müller-Buschbaum, K. (2016) Group 3 Elements and Lanthanide Metals, in Kaskel, S. (ed.) The chemistry of metal-organic frameworks : synthesis, characterization, and applications. Volume 1. Weinheim: Wiley-VCH Verlag, pp. 231-270. https://doi.org/10.1002/9783527693078.ch9

APA-Zitierstil: Müller-Buschbaum, K. (2016). Group 3 Elements and Lanthanide Metals. In Kaskel, S. (Ed.), The chemistry of metal-organic frameworks : synthesis, characterization, and applications. Volume 1 (pp. 231-270). Wiley-VCH Verlag. https://doi.org/10.1002/9783527693078.ch9