研究目的
Investigating the adsorption of Rose Bengal on a self-assembled fibrillar network to create a thermally switchable oxygenation photocatalyst and a thermochromic soft material.
研究成果
The gel 1-RB is an efficient 1O2 photosensitizer whose activity is heavily regulated by temperature, being the 1O2 production almost completely halted at 35 oC. The system constitutes a first example of how molecular gel assembly/disassembly can be used to modulate the catalytic activity of species present in the medium, producing smart, thermoresponsive, soft photocatalytic materials.
研究不足
The study is limited to the use of dichloromethane as the solvent and the specific molecular gelator used. The thermochromic behavior and photocatalytic activity are dependent on the gel assembly/disassembly process, which may not be applicable in all solvent systems or with other gelators.
1：Experimental Design and Method Selection:
The study involved the use of compound 1 to form a molecular gel in dichloromethane, which was then used to adsorb Rose Bengal (RB). The thermal regulation of singlet oxygen (1O2) photogeneration was investigated.
2：Sample Selection and Data Sources:
RB was used as a photosensitizer, and 9,10-dimethylanthracene (DMA) was used as a singlet oxygen trap.
3：List of Experimental Equipment and Materials:
A Bruker Avance III HD 400 MHz apparatus for NMR, a JASCO V-630 apparatus for UV-Vis measurements, and a Leica TCS SP8 confocal laser scanning microscope were used.
4：Experimental Procedures and Operational Workflow:
The gel formation was checked by turning the vial upside down. Photo-oxygenation reactions were performed inside closed quartz cuvettes, and the evolution of the photoreactions was monitored over time using UV-vis absorption spectrophotometry.
5：Data Analysis Methods:
The initial points of the kinetic traces were fitted to a pseudo-first order model.
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