Liu Ya-Qi, Huang Sen, Leng Ji-Dong, Lin Wei-Quan
School of Chemistry and Chemical Engineering, Institute of Clean Energy and Materials, Guangzhou University, Guangzhou Higher Education Mega Center, No. 230 Wai Huan Xi Road, Guangzhou 510006, China.
Molecules. 2024 Sep 5;29(17):4217. doi: 10.3390/molecules29174217.
This study presents the synthesis, structural characterization, and evaluation of the photocatalytic performance of two novel one-dimensional (1D) lead(II) bromide hybrids, [Co(2,2'-bpy)][PbBrCHOH] () and [Fe(2,2'-bpy)][PbBr] (), synthesized via solvothermal reactions. These compounds incorporate transition metal complex cations as structural directors, contributing to the unique photophysical and photocatalytic properties of the resulting materials. Single-crystal X-ray diffraction analysis reveals that both compounds crystallize in monoclinic space groups with distinct 1D lead bromide chain configurations influenced by the nature of the complex cations. Optical property assessments show band gaps of 3.04 eV and 2.02 eV for compounds and , respectively, indicating their potential for visible light absorption. Photocurrent measurements indicate a significantly higher electron-hole separation efficiency in compound , correlated with its narrower band gap. Additionally, photocatalytic evaluations demonstrate that while both compounds degrade organic dyes effectively, compound also exhibits notable hydrogen evolution activity under visible light, a property not observed in . These findings highlight the role of metal complex cations in tuning the electronic and structural properties of lead(II) bromide hybrids, enhancing their applicability in photocatalytic and optoelectronic devices.
本研究介绍了通过溶剂热反应合成的两种新型一维（1D）溴化铅杂化物[Co(2,2'-联吡啶)][PbBrCHOH]（）和[Fe(2,2'-联吡啶)][PbBr]（）的合成、结构表征及光催化性能评估。这些化合物包含过渡金属络合阳离子作为结构导向剂，赋予了所得材料独特的光物理和光催化性能。单晶X射线衍射分析表明，这两种化合物均结晶于单斜空间群，具有受络合阳离子性质影响的独特一维溴化铅链构型。光学性质评估显示，化合物和的带隙分别为3.04 eV和2.02 eV，表明它们具有可见光吸收潜力。光电流测量表明，化合物中的电子 - 空穴分离效率显著更高，这与其较窄的带隙相关。此外，光催化评估表明，虽然两种化合物都能有效降解有机染料，但化合物在可见光下还表现出显著的析氢活性，而在中未观察到该性质。这些发现突出了金属络合阳离子在调节溴化铅杂化物的电子和结构性质方面的作用，增强了它们在光催化和光电器件中的适用性。
