To study the effects of ultrasonic irradiation, heating, the molar ratio of initial reactants and reaction time on formation of [Pb 2 (4,4′-Bipy)I 4 ] n (1) and [Pb(4,4′-Bipy)I 2 ] n ( 2 ) coordination polymers, [4,4′-Bipy = 4,4′-Bipyridine], some experiments were designed and eight samples were synthesized under different conditions. The results showed that the [Pb(4,4′-Bipy)I 2 ] n ( 2 ) was the only stable product under the designed conditions, and it is the thermodynamically stable product. [Pb 2 (4,4′-Bipy)I 4 ] n ( 1 ) which can be formed only with crystallization technique is kinetically stable product. These samples were characterized by IR spectroscopy, X-ray powder diffraction (XRD), and scanning electron microscopy (SEM).

中文翻译：

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测定两种铅配位聚合物之间的动力学或热力学稳定产物

研究超声辐照、加热、初始反应物摩尔比和反应时间对 [Pb 2 (4,4'-Bipy)I 4 ] n (1) 和 [Pb(4,4'-Bipy) 形成的影响)I 2 ] n ( 2 )配位聚合物，[4,4'-Bipy = 4,4'-Bipyridine]，设计了一些实验，在不同条件下合成了8个样品。结果表明[Pb(4,4'-Bipy)I 2 ] n ( 2 )是设计条件下唯一稳定的产物，是热力学稳定的产物。[Pb 2 (4,4'-Bipy)I 4 ] n ( 1 ) 只能用结晶技术形成，是动力学稳定的产物。这些样品通过红外光谱、X 射线粉末衍射 (XRD) 和扫描电子显微镜 (SEM) 进行表征。