研究目的
To demonstrate a self-assembled peptide-appended naphthalene diimide as a fluorescent switch for sensing volatile acid and basic vapors.
研究成果
The study successfully demonstrated a peptide-appended naphthalene diimide-based supramolecular species that exhibits 'turn on' fluorescence in the presence of hazardous acid vapors and 'turn off' fluorescence in ammonia vapor. An economically viable paper strip method was developed for detection, which is recyclable for several times, indicating promise for future applications in sensing environmentally hazardous volatile acid vapors in a cost-effective manner.
研究不足
The study focuses on the detection of volatile acid and base vapors using a specific peptide-appended naphthalene diimide molecule. The sensitivity and specificity of the sensor to other types of vapors or under different environmental conditions were not explored.
1：Experimental Design and Method Selection
The study involved the synthesis of a histidine-containing peptide-appended naphthalenediimide-based molecule (NDIP) and its characterization through various spectroscopic and microscopic techniques to understand its gelation properties and fluorescence behavior in response to acid and base vapors.
2：Sample Selection and Data Sources
The gelator molecule NDIP was synthesized and purified for the study. Gels were formed in phosphate buffer and organic solvents like benzene, toluene, or xylene.
3：List of Experimental Equipment and Materials
Materials included 1,4,5,8-Naphthalenetetracarboxylic dianhydride, L-histidine, HOBt, DCC, and solvents like HFIP, toluene, and phosphate buffer. Equipment used included FT-IR spectrophotometer, HR-TEM, powder X-ray diffractometer, small-angle X-ray scattering setup, UV-Vis spectrophotometer, and fluorescence spectrometer.
4：Experimental Procedures and Operational Workflow
Gelation studies were conducted by dissolving NDIP in solvents and observing gel formation. Fluorescence studies were performed to observe the response to acid and base vapors. A paper strip-based sensor was developed for detecting volatile acid and base vapors.
5：Data Analysis Methods
Data from spectroscopic and microscopic techniques were analyzed to understand the molecular assembly and fluorescence properties. Fluorescence intensity changes were measured in response to different concentrations of acid vapors.
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