Although fluorescence detection is a sensitive method in the field of pollutant analysis, its application is restricted due to the fluorescence shown by organic material being quenched after aggregation and to low photo-thermal stability. To address these issues, a novel mineral/dye composite material was prepared by intercalating a fluorescence molecule, Rhodamine (R6G), into the interlayer space of montmorillonite (Mnt). This composite material greatly enhanced the light stability and efficiency of R6G. After enhancement, the fluorescence lifetime of R6G-Mnt was eight times longer than originally and the luminous intensity was 20 times greater. Chromium at the mmol/L (mM) level can be detected by the naked eye when its enhanced fluorescent property is fabricated into a solid test paper, even though a fluorescence spectrophotometer should be used for detection at the 0.01 μmol/L level in the sensing range 0.01 μmol/L to 100 mmol/L. These results can provide new avenues as well as a theoretical and experimental foundation for the development of novel supramolecular luminescent material.

中文翻译：

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一种新型粘土/染料复合材料的制备及其在污染物检测中的应用

荧光检测虽然是污染物分析领域的一种灵敏方法，但由于有机物聚集后荧光被淬灭，光热稳定性低，限制了其应用。为了解决这些问题，通过将荧光分子罗丹明 (R6G) 嵌入蒙脱石 (Mnt) 的层间空间，制备了一种新型矿物/染料复合材料。这种复合材料大大增强了R6G的光稳定性和效率。增强后，R6G-Mnt的荧光寿命比原来延长了8倍，发光强度提高了20倍。将其增强的荧光特性制成固体试纸后，肉眼即可检测到毫摩尔/升（mM）水平的铬，即使在 0.01 μmol/L 至 100 mmol/L 的传感范围内应使用荧光分光光度计检测 0.01 μmol/L 水平。这些结果可为开发新型超分子发光材料提供新的途径以及理论和实验基础。