Py and BPe solvent polarity scales: effect of temperature on pyrene and benzo[ghi]perylene fluorescence spectra.
Py and BPe solvent polarity scales: effect of temperature on pyrene and benzo[ghi]perylene fluorescence spectra.
复制标题
Py和BPe溶剂极性标度：温度对芘和苯并苝荧光光谱的影响。
DOI：
10.1039/an9881301465
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
StreetJr,KW
中科院分区：
文献类型：
--
作者：
Waris,R;AcreeJr,WE;StreetJr,KW
Py和BPe溶剂极性标度基于溶解在流体溶液中的芘和苯并[ghi]二萘嵌苯的物理化学性质。带I和带III的荧光发射强度的比率用作溶剂极性的定量量度。报道了溶解在乙酸丁酯、正丁醚、异丁基甲基酮（IBMK）、辛-1-醇、二甲基亚砜（DMSO）、碳酸丙烯酯和几种水-有机混合物中的芘的强度比作为温度的函数。还测定了苯并[ghi] 苝在乙酸丁酯、二丁醚、IBMK、二甲基甲酰胺二甲缩醛和DMSO水溶液混合物中的强度比。这些测量的结果表明，数值Py值随温度而变化，特别是对于极性较大的溶剂。相比之下，BPe溶剂极性尺度似乎几乎与温度无关。
The Py and BPe solvent polarity scales are based on the photophysical properties of pyrene and benzo[ghi]perylene dissolved in a fluid solution. The ratio of the fluorescence emission intensities for bands I and III serve as a quantitative measure of solvent polarity. Intensity ratios are reported for pyrene dissolved in butyl acetate, dibutyl ether, isobutyl methyl ketone (IBMK), octan-1-ol, dimethyl sulphoxide (DMSO), propylene carbonate and several water-organic mixtures as a function of temperature. The intensity ratios for benzo[ghi]perylene in butyl acetate, dibutyl ether, IBMK, dimethylformamide dimethyl acetal and an aqueous DMSO mixture were also determined. The results of these measurements indicate that numerical Py values vary with temperature, particularly for the more polar solvents. In comparison the BPe solvent polarity scale appears to be nearly independent of temperature.