A new series of isomorphic lanthanide metal–organic frameworks (Ln-MOFs), {[Ln₂(L)₃·DMF·H₂O]·DMF·H₂O}_n (denoted as 1-Ln, Ln = Eu, Gd, Tb or Eu_xTb_1−x), were constructed using the 4′-(1H-1,2,4-triazol-1-yl)-[1,1′-biphenyl]-3,5-dicarboxylic acid (H₂L) ligand and Ln³⁺ ions under solvothermal conditions. 1-Ln shows a binodal (3,3,8)-connected three-dimensional (3D) framework based on a π-conjugated and uncoordinated Lewis basic triazolyl ligand. Then, six two-color doped 1-Eu_xTb_1−x and the tri-metallic doped 1-Eu_0.01Gd_0.6015Tb_0.3885 with white light emitting MOFs were fabricated by doping diverse concentrations of Eu³⁺, Tb³⁺ and Gd³⁺ ions. More interestingly, 1-Eu_0.01Gd_0.6015Tb_0.3885 has a higher quantum yield (36.49%). Meanwhile, 1-Ln shows excellent performance in fluorescence sensing (K_sv = 1.5143 × 10⁴ M⁻¹) and anticounterfeiting applications.

中文翻译：

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发光调制，近白光发射，选择性发光感应和通过一系列具有π共轭和不配位的路易斯碱性三唑基配体的Ln-MOF进行防伪

一系列新的同构镧系金属有机骨架（Ln-MOF），{[Ln ₂（L）₃ ·DMF·H ₂ O]·DMF·H ₂ O} _n（表示为1-Ln，Ln = Eu，使用4'-（1 H -1,2,4-三唑-1-基）-[1,1'-联苯] -3,5-二羧酸构建Gd，Tb或Eu _x Tb _{1- x}）溶剂热条件下生成酸（H ₂ L）配体和Ln ³⁺离子。图1-Ln示出了基于π-共轭的和未配位的路易斯碱性三唑基配体的，与二元体（3,3,8）相连的三维（3D）骨架。然后，六个两色掺杂的1-Eu _x铽_{1- X}和三金属掺杂1铕_0.01钆_0.6015铽_0.3885用白色发光的MOF被掺杂的Eu的浓度不同的制造³⁺，Tb的³⁺和Gd ³⁺离子。更有趣的是，1-Eu _0.01 Gd _0.6015 Tb _0.3885具有更高的量子产率（36.49％）。同时，1-Ln在荧光传感（K _sv = 1.5143×10 ⁴ M ^-1）和防伪应用中显示出出色的性能。