TY - JOUR

T1 - Comparison of Photophysical Properties of Lanthanide(III) Complexes of DTTA- or DO3A-Appended Aryl-2,2′-Bipyridines

AU - Krinochkin, Alexey P.

AU - Valieva, Maria I.

AU - Starnovskaya, Ekaterina S.

AU - Shtaitz, Yaroslav K.

AU - Kopchuk, Dmitry S.

AU - Taniya, Olga S.

AU - Kim, Grigory A.

AU - Shevyrin, Vadim A.

AU - Zyryanov, Grigory V.

AU - Chupakhin, Oleg N.

N1 - This research was supported by the Russian Scientific Foundation: Ref. # 18-73-10119-P (the synthesis and investigation of DTTA-appended chelates) and Ministry of Science and the Higher Education of RF: Ref. # 075-15-2022-1118, dated 29 June 2022 (the synthesis and investigation of DO3A-appended chelates).

PY - 2023

Y1 - 2023

N2 - New Tb(III) and Eu(III) complexes based on aryl-2,2′-bipyridine ligands with a cyclic DO3A chelating unit appended in the alpha position of the bipyridine core were synthesized. The photophysical properties of these complexes were compared with those of complexes of ligands with identical aryl-2,2′-bipyridine chromophores, but with an acyclic DTTA residue as an additional chelating site in the alpha position of the bipyridine core. The nature of the polyaminocarboxylic acid fragments was found to have a significant influence on the luminescence. For some of the Eu(III) complexes, upon the transition from acyclic DTTA- to the cyclic DO3A-appended ligands, a noticeable increase in the intensity of Eu(III) luminescence was observed, with an increase in the quantum yield of up to 2.55 times. In contrast, for most of the Tb(III) complexes, a similar transition resulted in a noticeable decrease in the luminescence intensity of the Tb(III) cation. © 2023 by the authors.

AB - New Tb(III) and Eu(III) complexes based on aryl-2,2′-bipyridine ligands with a cyclic DO3A chelating unit appended in the alpha position of the bipyridine core were synthesized. The photophysical properties of these complexes were compared with those of complexes of ligands with identical aryl-2,2′-bipyridine chromophores, but with an acyclic DTTA residue as an additional chelating site in the alpha position of the bipyridine core. The nature of the polyaminocarboxylic acid fragments was found to have a significant influence on the luminescence. For some of the Eu(III) complexes, upon the transition from acyclic DTTA- to the cyclic DO3A-appended ligands, a noticeable increase in the intensity of Eu(III) luminescence was observed, with an increase in the quantum yield of up to 2.55 times. In contrast, for most of the Tb(III) complexes, a similar transition resulted in a noticeable decrease in the luminescence intensity of the Tb(III) cation. © 2023 by the authors.

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U2 - 10.3390/molecules28020724

DO - 10.3390/molecules28020724

M3 - Article

VL - 28

JO - Molecules

JF - Molecules

SN - 1420-3049

IS - 2

M1 - 724

ER -