Two‐Color Three‐State Luminescent Lanthanide Core–Shell Crystals

Abstract

Luminescent core-shell crystals based on lanthanide tris-dipicolinate complexes were obtained from the successive growing of two different lanthanide complex layers. Selective or simultaneous emission of each part of the crystal can be achieved by a careful choice of the excitation wavelength.

Design and properties of multiple-emitter luminescent metal–organic frameworks

“…2,19,20 Even if there is an interparticle or interlayer phase boundary in a so-called multi-heterostructured emitter (see below) one could still view this as a single LMOF phase since the different phases are constructed on the lattice match between MOFs with similar topologies. 21,22 (2) They benefit from the modifiable pore surface of MOFs, such that the chromophore moieties can be integrated into the MOF matrix by post-synthetic modification (PSM). [23][24][25][26][27] This provides possibilities for creating multi-emitter LMOFs, in which the multiple emission is added through the PSM-chromophore to a pristine single-emitter LMOF or even a non-luminescent MOF.…”

Colorimetry of Luminescent Lanthanide Complexes

“…Complexes based on dipicolinate derivatives are efficient and versatile ligands for complexing and sensitising lanthanide ions [ 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. In a previous work, we showed that they can be printed on paper and combined to obtain invisible full colour images for anti-counterfeiting of valuable documents [ 9 ].…”

Microcrystalline Core–Shell Lanthanide-Based Coordination Polymers for Unprecedented Luminescent Properties

“…Indeed, their similar chemical behavior, that most often induces series of isostructural coordination compounds, constitutes an asset for achieving epitaxial growth. Examples of 3D molecular epitaxial growth of complexes , or coordination polymers − already exist in the literature, but surprisingly, there are very few examples that involve lanthanide ions. ,, Moreover, all publications devoted to lanthanide-based coordination compounds describe multipot syntheses in which crystals that constitute the cores are first isolated from their mother solution and then immerged in another solution for constructing the shells. As a consequence, these synthetic methods can only lead to single or bulk crystals.…”

“…Examples of 3D molecular epitaxial growth of complexes 36,37 or coordination polymers 38−50 already exist in the literature, but surprisingly, there are very few examples that involve lanthanide ions. 37,49,50 Moreover, all publications devoted to lanthanide-based coordination compounds describe multipot syntheses in which crystals that constitute the cores are first isolated from their mother solution and then immerged in another solution for constructing the shells. As a consequence, these synthetic methods can only lead to single or bulk crystals.…”