| Autor: |
Butorlin OS; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia., Petrova AS; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia., Toikka YN; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia., Kolesnikov IE; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia., Orlov SN; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia.; Institute of Nuclear Industry, Peter the Great St. Petersburg Polytechnic University (SPbSU), 29, Polytechnicheskaya Street, Saint Petersburg 195251, Russia., Ryazantsev MN; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia.; Nanotechnology Research and Education Centre RAS, Saint Petersburg Academic University, ul. Khlopina 8/3, Saint Petersburg 194021, Russia., Bogachev NA; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia., Skripkin MY; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia., Mereshchenko AS; Saint Petersburg State University, 7/9 Universitetskaya emb., Saint Petersburg 199034, Russia. |
| Abstrakt: |
New heterometallic antenna terephthalate MOFs, namely, (Eu x M 1-x ) 2 bdc 3 ·4H 2 O (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 Ln 2 bdc 3 ∙4H 2 O. Upon 300 nm excitation to the singlet excited state of terephthalate ions, all compounds exhibit a bright red emission corresponding to the of 5 D 0 - 7 F J (J = 0-4) f-f transitions of Eu 3+ 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 quantitatively compare the antenna effect among different compounds, we proposed the new approach, where the quantum yield of the 5 D 0 formation is used to characterize the efficiency of energy transfer from the ligand antenna to the Eu 3+ emitter. |
