Stoichiometrically Controlled Assembly of Lanthanide Molecular Complexes of the Heteroditopic Divergent Ligand 4′-(4-Pyridyl)-2,2′:6′,2″-terpyridine <i>N</i>-Oxide in Hypodentate or Bridging Coordination Modes. Structural, Magnetic, and Photoluminescence Studies
作者:Lorenzo Fioravanti、Luca Bellucci、Lidia Armelao、Gregorio Bottaro、Fabio Marchetti、Francesco Pineider、Giordano Poneti、Simona Samaritani、Luca Labella
DOI:10.1021/acs.inorgchem.1c02809
日期:2022.1.10
tris-β-diketonato complexes RE(tta)3dme [RE = Y (1), La (2), Dy (3), or Eu (4); Htta = 2-thenoylacetone; dme = 1,2-dimethoxyethane] react cleanly at room temperature in a 1:1 molar ratio with the heteroditopic divergent ligand 4′-(4-pyridyl)-2,2′:6′,2″-terpyridine N-oxide (pyterpyNO) to yield RE2(tta)6(pyterpyNO)n, where n = 2 for RE = Y (5), Dy (6), or Eu (7) and n = 3 for RE = La (8). The crystal structure
单核稀土三-β-二酮配合物 RE(tta) 3 dme [RE = Y ( 1 )、La ( 2 )、Dy ( 3 ) 或 Eu ( 4 );Htta = 2-thenoylacetone; dme = 1,2-二甲氧基乙烷] 在室温下以 1:1 的摩尔比与异双位分散配体 4'-(4-吡啶基)-2,2':6',2"-三联吡啶N-氧化物 ( pyterpyNO)重新得到2(TTA)6(pyterpyNO)ñ,其中ñ = 2 RE = Y(5),镝(6),或Eu(7)和ñ = 3 RE = La(上8)。5的晶体结构揭示了一种双核化合物,其中两个 pyterpyNO 以低齿模式桥接氧原子,使三联吡啶部分不配位。对于 RE = Y ( 9 )、Dy ( 10 ) 或 Eu ( 11 ),使用 2 的金属:pyterpyNO 摩尔比,可以分离分子复合物 RE 4 (tta) 12 (pyterpyNO)