1：Experimental Design and Method Selection:

The study involved synthesizing fluorenylboronate ester compounds (1, 2, 3) and their phenol derivatives, characterizing their photophysical properties, and testing their sensing capabilities in thin films blended with an organic base (tetra-n-butylammonium hydroxide) for real-time detection of hydrogen peroxide vapor from decomposed TATP. The mechanism relies on the conversion of boronate esters to phenoxides under basic conditions, leading to fluorescence turn-on.

2：Sample Selection and Data Sources:

Compounds 1, 2, and 3 were synthesized as described. TATP vapor was generated by decomposing TATP powder with Amberlyst-15 solid acid, and concentrations were controlled using mass flow controllers with nitrogen as the carrier gas.

3：List of Experimental Equipment and Materials:

Equipment includes UV-vis spectrophotometers (Cary 5000, Cary 60), fluorometers (Horiba Jobin-Yvon Fluoromax 4, Jobin-Yvon Fluorolog 3), NMR spectrometers (Bruker Avance 300, 400, 500 MHz), FT-IR spectrometer (PerkinElmer Spectrum 100), mass spectrometers (Bruker Esquire HCT, Bruker MicroTOF-Q), DSC (PerkinElmer Diamond), TGA (PerkinElmer STA 6000), and a prototype hand-held sensor with LED and photodiode. Materials include synthesized compounds, solvents (THF, toluene, ethanol, DMF, etc.), reagents (n-BuLi, hydrogen peroxide, tetra-n-butylammonium hydroxide, Amberlyst-15), and substrates (fused silica).

4：Experimental Procedures and Operational Workflow:

Films were prepared by drop-casting solutions of boronate esters and base onto fused silica substrates. Sensing measurements involved exposing films to {TATP} vapor in a flow cell, monitoring PL kinetics with excitation at phenoxide absorption peaks, and using a prototype detector with a coated capillary.

5：Data Analysis Methods:

PL quantum yields were measured relative to quinine sulfate standard. Limit of detection was calculated based on PL intensity change and standard deviation in air. NMR and mass spectrometry were used for compound characterization.