Metal–Organic Frameworks Modulated by Doping Er³⁺ for Up-Conversion Luminescence

Abstract

Here we present metal-organic frameworks prepared by a one-step synthesis method, possessing both architectural properties of MOF building and up-conversion luminescence of rare earth Er(3+) (hereafter denoted as Up-MOFs). Up-MOFs have characteristic up-conversion emissions at 520, 540, and 651 nm under the excitation of 980 nm owing to the multiple photon absorption. The up-conversion mechanism of these Up-MOFs has been discussed, and it can be attributed to the excited state absorption process. The design and synthesis of Up-MOF materials possessing near-infrared region excitation and up-conversion luminescence are fully expected to be candidates for the advancement of applications in bioimaging, sensors, optoelectronics, and energy conversion/storage devices.

Recent Advances in Luminescence Imaging of Biological Systems Using Lanthanide(III) Luminescent Complexes

“…One of the limitations of the MOFs cited above is the coordination of, at least, one solvent molecule to the Ln III , which increases the non-radiative rates and decreases the UC efficiency. Other Ln III MOFs showing UC sensitized emission are reported [183][184][185], and the same problem mentioned above was found, the solvent coordinated to the Ln III decreases the UC efficiency. Research in the development of UC sensitized emission in molecular Ln III complexes using reasonable laser intensities is a field in development.…”

Facile synthesis of Fe3O4/MIL-101 nanocomposite as an efficient heterogeneous catalyst for degradation of pollutants in Fenton-like system

“…[6][7][8][9] These unique properties endow MOFs with wide applications in the areas of catalysis, 10 molecular separations, 11 sensing, 12,13 and gas adsorption, 14 etc. Moreover, MOF materials also exhibit tremendous potential in the degradation of pollutants in the wastewater.…”

Synthetic Strategies and Structural Arrangements of Isoreticular Mixed‐Component Metal–Organic Frameworks

“…By employing mixed-component strategies, new degrees of freedom in controlling of MOF properties are gained. The incorporation of an additional linker or metal may result in changes of the material properties, like adsorption properties, [19b, 21a, 48c, 82a, 91] acid-base behavior, [49a] thermal [19b,c, 70b, 92] and chemical [92b, 93] stability, conductivity, [91c, 94] flexibility [21a, 95] or the emission [96] and absorption of light. [48a, 97] The obtained mixed-component MOFs often show synergistic effects.…”