1：Experimental Design and Method Selection:

The study involved synthesizing boron difluoride complexes (BA1 and BA2) and characterizing their photophysical and chiroptical properties. Methods included synthesis, NMR spectroscopy, mass spectrometry, SEM, DLS, UV-Vis absorption, fluorescence spectroscopy, CD and CPL measurements, and X-ray crystallography.

2：Sample Selection and Data Sources:

Samples were synthesized from enantiopure BINOL derivatives. Data were obtained from laboratory experiments using standard chemical reagents and solvents.

3：List of Experimental Equipment and Materials:

Equipment included Bruker AV-300 and AV-400 NMR spectrometers, LCQ ESI-MS mass spectrometer, JEOL JSM-7800F SEM, ELS-ZA2 DLS instrument, Shimadzu UV-1750 spectrometer, Horiba Fluoromax-4 spectrometer, Horiba Jobin Yvon Fluorolog-3 spectrofluorimeter, JASCO J-820 spectropolarimeter, and JASCO CPL-300 spectrofluoropolarimeter. Materials included silica gel, solvents like DCM, THF, water, TFA, Et3N, and chemical reagents for synthesis.

4：Experimental Procedures and Operational Workflow:

Synthesis involved multi-step reactions with purification by column chromatography. Photophysical measurements were conducted in solutions and solid states. Aggregation studies used THF/water mixtures. Acid-base switching involved adding TFA and Et3N.

5：3N. Data Analysis Methods:

5. Data Analysis Methods: Data were analyzed using standard spectroscopic techniques, with dissymmetry factors calculated from CD and CPL spectra, and quantum yields determined using reference compounds.