The Structure and Optical Properties of Luminescent Europium Terephthalate Antenna Metal-Organic Frameworks Doped by Yttrium, Gadolinium, and Lanthanum Ions.

ABSTRACT: New heterometallic antenna terephthalate MOFs, namely, (Eu_xM_1-x)₂bdc₃·4H₂O (M = Y, La, Gd) (x = 0.001-1), were synthesized by a one-step method from aqueous solutions. The resulting compounds are isomorphic to each other; the crystalline phase corresponds to Ln₂bdc₃∙4H₂O. Upon 300 nm excitation to the singlet excited state of terephthalate ions, all compounds exhibit a bright red emission corresponding to the of ⁵D₀-⁷F_J (J = 0-4) f-f transitions of Eu³⁺ ions. The Eu(III) concentration dependence of the photophysical properties was carefully studied. We revealed that Gd-doping results in photoluminescence enhancement due to the heavy atom effect. To

SUBMITTER: Butorlin OS 

PROVIDER: S-EPMC11314237 | biostudies-literature | 2024 Jul

REPOSITORIES: biostudies-literature