研究目的
To develop a new luminescent sensor for trace water in organic solvents using a metal–organic framework (MOF) with encapsulated Rhodamine 6G (R6G) dye.
研究成果
The composite R6G@Mn-sdc-1 serves as an effective luminescent sensor for trace water in organic solvents, with a detection limit of 0.035% in ethanol. The sensor's performance is attributed to the reversible transformation of Mn-sdc-1 to Mn-sdc-2 in the presence of water, which releases the encapsulated R6G and enhances fluorescence intensity.
研究不足
The study is limited to the detection of trace water in ethanol, acetone, and acetonitrile. The sensitivity and applicability of the sensor in other solvents or under different environmental conditions were not explored.
1：Experimental Design and Method Selection:
The study involved the synthesis of two MOFs, Mn-sdc-1 and Mn-sdc-2, with different pore sizes. R6G was introduced into Mn-sdc-2 to form R6G@Mn-sdc-2, which was then transformed into R6G@Mn-sdc-1 through a single-crystal to single-crystal transformation process.
2：Sample Selection and Data Sources:
The samples were prepared by immersing Mn-sdc-2 in DMF solutions of R6G at various concentrations.
3：List of Experimental Equipment and Materials:
The study utilized MOFs Mn-sdc-1 and Mn-sdc-2, Rhodamine 6G dye, and DMF as the solvent.
4：Experimental Procedures and Operational Workflow:
The transformation process was triggered by heating, and the fluorescence properties of the resulting composites were investigated.
5：Data Analysis Methods:
Fluorescence intensity measurements were used to monitor the release of R6G in the presence of trace water, and the Stern–Volmer equation was applied to quantify the sensitivity of the sensor.
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