论文标题
改进的分光光度计测试Einstein-Smoluchowski方程：重新访问和更新
An improved spectrophotometry tests the Einstein-Smoluchowski equation: a revisit and update
论文作者
论文摘要
溶剂中的光线相互作用引起了对理论预测和实验度量的不断关注，部分原因是对自然界的简单好奇心，部分原因是来自溶剂涉及的应用程序的调用增加。然而，迄今为止，大多数可见光后透明溶剂的可靠分光光度测量最终使用长路径长度的细胞（通常数十个CM），使措施昂贵且复杂。同时，选择描述溶剂散射的最佳公式的指导仍然不安。在这里，我们从理论上和实验上证明了一种简单，低成本和多功能的分光光度法方法，基于使用标准的双光束分光光度计，在0.5 cm差速器路径长度上记录灵敏度10-4 dB/cm。我们证明该方法将路径长度降低了100倍，同时仍将其最接近记录测量的方法减少。重新审视溶剂散射的当前方程式，我们展现了它们都提供了相似的预测价值，仅在公式的简单实用性上揭示了选择标准。在阐明了光散射决定溶剂灭绝的波长之后，我们确定差异在计算出的散射系数与测量结果之间存在差异，这表明需要改善溶剂散射理论以更深入地理解现象。
Light-matter interaction in solvents has attracted continuous attention for theoretical prediction and experimental measure, due in part to the simple curiosity to nature, and in part to increasing calls from solvent-involved applications. Yet hitherto, a majority of reliable spectrophotometric measurements on transparent solvents upon visible light end up using long-path-length cells, usually over dozens of cm, rendering the measures costly and complex; meanwhile, the guidance for choosing the best formula to describe solvent scattering has remained unsettled. Here we theoretically and experimentally demonstrate a simple, low-cost, and versatile spectrophotometric method, recording sensitivity 10-4 dB/cm over 0.5 cm differential path length based on using a standard double-beam spectrophotometer. We attest the method reduces the path length by a factor of 100 while still making its closest approach to the record-low measurements. Revisiting the present equations of solvent scattering, we unfold that they all give similar-predictive-values, revealing the criterion of choice merely on the formula's simple practicality. Following the clarification of wavelengths over which light scattering dictates the solvent's extinction, we identify that the discrepancies persist between the calculated scattering coefficients and those measured results, suggesting the need for improving solvent scattering theory to comprehend the phenomenon in greater depth.
