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Extraction of dyes contained in glow sticks using liquid CO2
Green Chemistry Letters and Reviews ( IF 6.6 ) Pub Date : 2019-05-29 , DOI: 10.1080/17518253.2019.1609594
Bruce W. Baldwin 1 , Kasey R. Bunker 1 , Thomas S. Kuntzleman 1
Affiliation  

Separation of glow stick dyes adhered to a cotton swab using liquid CO2 provides an engaging demonstration of several chemical concepts including polarity, kinetics, chemiluminescence, and the importance of CO2 a green solvent. The simple protocol allows access to a broad range of students. Differential polarities of the glow stick dyes allow certain dyes to be preferentially dissolved in liquid CO2, leaving other dyes adhered onto cotton. Both TCPO (bis(2,4,6-trichlorophenyl)oxalate) and H2O2, which together provide the necessary reaction for chemiluminescence, are present in both the extracted liquid and cotton upon dissipation of CO2. Thus, it is possible to compare the emission spectrum of the extracted fluid to that of the original glow stick and the residue left on the cotton swab. Emission peaks resulting from the presence of polar dyes in the original glow stick and on the cotton are routinely observed to be missing in the extracts.



中文翻译:

使用液态CO 2提取荧光棒中包含的染料

使用液体CO 2分离附着在棉签上的荧光棒染料,可以很好地证明几种化学概念,包括极性,动力学,化学发光以及绿色溶剂CO 2的重要性。简单的协议允许访问广泛的学生。荧光棒染料的极性不同,可使某些染料优先溶解在液态CO 2中,而其他染料则附着在棉上。提取的液体和棉花中,CO 2消散后,TCPO(双(2,4,6-三氯苯基)草酸酯)和H 2 O 2共同提供化学发光的必需反应。。因此,可以将提取的流体的发射光谱与原始电热棒的发射光谱以及残留在棉签上的残留物进行比较。通常观察到提取物中缺少原始荧光棒中和棉花上存在的极性染料导致的发射峰。

更新日期:2019-05-29
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