The phosphonium-decorated phenanthro-imidazolyl pyridine ligand, LP⁺Br, readily reacts with zinc(II) and cadmium(II) bromides to give inorganic–organic zero-dimensional compounds [LP⁺ZnBr₂]₂[ZnBr₄] (1) and [(LP⁺)₂Cd₂Br₄][CdBr₄] (2), respectively, upon crystallization. These salts are moderately fluorescent in the solid state under ambient conditions (λ_em = 458 nm, Φ_em = 0.11 for 1; λ_em = 460 nm, Φ_em = 0.13 for 2). Their emission results from spin-allowed electronic transitions localized on the organic component with the negligible effect of [MBr₄]^2– and MBr₂ units. Contrary to ionic species 1 and 2, lead(II) bromide affords a neutral and water-stable complex [(LP⁺)₂Pb₃Br₈] (3), showing weak room-temperature phosphorescence arising from spin–orbit coupling due to the heavy atom effect. The emission, which is substantially enhanced for the amorphous sample of 3 (λ_em = 575 nm, Φ_em = 0.06), is assigned to the intraligand triplet excited state, which is a rare phenomenon among Pb(II) molecular materials.

中文翻译：

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Zn、Cd 和 Pb 与阳离子菲二亚胺配体的杂化无机-有机配合物

磷修饰的菲并咪唑基吡啶配体LP ⁺ Br 很容易与溴化锌 (II) 和溴化镉 (II) 反应生成无机-有机零维化合物 [ LP ⁺ ZnBr ₂ ] ₂ [ZnBr ₄ ] ( 1 )和[( LP ⁺ ) ₂ Cd ₂ Br ₄ ][CdBr ₄ ] ( 2 )，分别在结晶时。这些盐在环境条件下处于固态时会发出适度的荧光（λ _em = 458 nm，Φ _em = 0.11 for 1 ; λ _em= 460 nm，Φ _em = 0.13 for 2 )。_{它们的发射源于有机成分上的自旋允许电子跃迁，[MBr 4} ] ^2–和 MBr ₂单元的影响可忽略不计。与离子种类1和2相反，溴化铅 (II) 提供了一种中性且水稳定的络合物 [( LP ⁺ ) ₂ Pb ₃ Br ₈ ] ( 3 )，显示由于自旋轨道耦合而产生的弱室温磷光重原子效应。对于3 (λ_em = 575 nm, Φ _em = 0.06), 被分配给配体内三重激发态，这是 Pb(II) 分子材料中罕见的现象。