TY - JOUR

T1 - The Structure and Optical Properties of Luminescent Europium Terephthalate Antenna Metal–Organic Frameworks Doped by Yttrium, Gadolinium, and Lanthanum Ions

AU - Буторлин, Олег Сергеевич

AU - Петрова, Анна Сергеевна

AU - Тойкка, Юлия Николаевна

AU - Колесников, Илья Евгеньевич

AU - Орлов, Сергей Николаевич

AU - Рязанцев, Михаил Николаевич

AU - Богачев, Никита Александрович

AU - Скрипкин, Михаил Юрьевич

AU - Мерещенко, Андрей Сергеевич

PY - 2024/7/28

Y1 - 2024/7/28

N2 - New heterometallic antenna terephthalate MOFs, namely, (Eu xM 1-x) 2bdc 3·4H 2O (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 2bdc 3∙4H 2O. Upon 300 nm excitation to the singlet excited state of terephthalate ions, all compounds exhibit a bright red emission corresponding to the of 5D 0- 7F 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 5D 0 formation is used to characterize the efficiency of energy transfer from the ligand antenna to the Eu 3+ emitter.

AB - New heterometallic antenna terephthalate MOFs, namely, (Eu xM 1-x) 2bdc 3·4H 2O (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 2bdc 3∙4H 2O. Upon 300 nm excitation to the singlet excited state of terephthalate ions, all compounds exhibit a bright red emission corresponding to the of 5D 0- 7F 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 5D 0 formation is used to characterize the efficiency of energy transfer from the ligand antenna to the Eu 3+ emitter.

KW - antenna effect

KW - europium

KW - gadolinium

KW - lanthanum

KW - luminescence

KW - metal–organic framework

KW - rare earth

KW - yttrium

UR - https://www.mendeley.com/catalogue/6b080011-fe1a-3124-9548-234c98d5882b/

U2 - 10.3390/molecules29153558

DO - 10.3390/molecules29153558

M3 - Article

C2 - 39124962

VL - 29

JO - Molecules

JF - Molecules

SN - 1420-3049

IS - 15

M1 - 3558

ER -