若丹明6G圆锥泡光致发光的实验研究

利用一种改进后的U型管圆锥泡声致发光装置,研究了若丹明6G在1,2-丙二醇溶液中的光致发光现象.测量得到了若丹明6G在不同浓度时的圆锥泡声致发光光谱,结果表明利用圆锥泡声致发光可以激发若丹明6G使其发出荧光,从而证明了在溶液中加入荧光物质的声致发光实验中存在光致发光现象.在较高浓度时,由于若丹明6G存在强烈的自吸收,圆锥泡光致发光的荧光峰值与利用普通激光激发得到的荧光峰值相比向长波方向发生了红移.圆锥泡光致发光能否在光谱测量中被探测到在一定程度上取决于荧光与圆锥泡声致发光的光发射强度的比值.

Conical Bubble Photoluminescence of Rhodamine 6G

A modified U-tube conical bubble sonoluminescence device is used to study the conical bubble photoluminescence.The spectra of conical bubble sonoluminescence at different concentrations of rhodamine 6G(Rh6G) solution in 1,2propanediol have been measured.Results show that the sonoluminescence from the conical bubbles can directly excite Rh6G,which in turn can fluoresce.This verifies that there exists sonophotoluminescence in sonoluminescence.The maximum of fluorescence spectral line intensity in the conical bubble photoluminescence has a red shift in relative to that of the standard photo-excited fluorescence,which is due to the higher self-absorption of Rh6G.