Lanthanide cation encapsulated in a metal–organic framework as a white LED and selective naked-eye reversible HCl sensor

Abstract

A prepared anionic HPU-14, which was employed as a platform for loading green-emitting Tb3+ and red-emitting Eu3+ into nanotube channels of the blue-emitting MOF via an ion-exchange process, is suitable for white light-emitting LED devices and enables the sensitive colorimetric reversible detection of gaseous HCl.

Huge enhancement of Sm2+ emission via Eu2+ energy transfer in a SrB4O7 pressure sensor

“…The divalent lanthanide (Ln) ions are interesting luminescent centers because of the smaller energy gap between the 4f n ground and the first excited 4f nÀ1 5d configurations compared to the Ln 3+ ions. [22][23][24][25][26][27][28][29] This smaller energy difference increases the mixing of wavefunctions of the different configurations, i.e. increasing the 5d state opposite parity character of the 4f wavefunctions, that shorten the lifetime and increases the intensity of the luminescence of Ln 2+ ions.…”

A New Fluorescence MOF for Highly Sensitive Detection of Acetylacetone

“…Among the multitudinous factors that can affect the self‐assembly procedure for MOFs, the selection of organic ligand and metal center show undoubtedly the two most decisive effects [26] . Given the strong coordination capability, diverse coordination modes, easy modification, polycarboxylate ligands have been proved to be the most popular linkers for the MOFs construction [27] . Among them, rigid polycarboxylate (linear dicarboxylate, trigonal tricarboxylate, planar tetracarboxylate) are the most studied, [28] while the semi‐rigid polycarboxylate ligands have been less reported [29] .…”

Recent Progress in Luminous Particle‐Encapsulated Host–Guest Metal‐Organic Frameworks for Optical Applications

“…Based on this, a series of similar Ln 3+ @MOF composites have been successively constructed for white light emission. [188][189][190][191] However, the QY of Ln 3+ @MOFs mentioned above are usually very low due to the inefficient sensitization of the MOFs host to encapsulate Ln 3+ .…”