1：Experimental Design and Method Selection:

The study employs a combination of synthesis, X-ray crystallography, steady-state and time-resolved spectroscopy, and two-photon microscopy to investigate the photophysical properties and dynamics of CF3-HTTH and related compounds in solid state. Theoretical models such as Kasha's exciton model are used to interpret the results.

2：Sample Selection and Data Sources:

Compounds CF3-HTTH, CF3-MTTH, CF3-MTTM, and reference compounds (HTTH, t-HTTH, m-HTTH, F-HTTH) were synthesized and characterized. Single crystals were grown by slow evaporation from dichloromethane/ethanol solutions. Data include NMR spectra, mass spectra, and X-ray diffraction data.

3：List of Experimental Equipment and Materials:

Instruments include Varian Unity 400 NMR spectrometer, Finnigan MAT TSQ-46C GC/MS/MS/DS mass spectrometer, Rigaku RAXIS RAPID IP imaging plate system for X-ray diffraction, Hitachi U-3310 spectrophotometer, Edinburgh FS920 fluorimeter, Edinburgh FL 900 and OB-900 L TCSPC systems, femtosecond fluorescence up-conversion system (FOG100, CDP), Zeiss LSM 710 microscope with Mai-Tai DeepSee Ti:sapphire laser, and Becker&Hickl GmbH TCSPC components (SPC-150, PML-16-1-C, DDG-210). Materials include silica gel, dichloromethane, DMF, and various chemical reagents.

4：0). Materials include silica gel, dichloromethane, DMF, and various chemical reagents. Experimental Procedures and Operational Workflow:

4. Experimental Procedures and Operational Workflow: Synthesis of compounds followed modified literature procedures. Steady-state absorption and emission spectra were recorded. Time-resolved measurements used TCSPC and femtosecond up-conversion techniques. Two-photon microscopy was performed to study spatial emission properties. Kinetic simulations were conducted using Wolfram Mathematica.

5：Data Analysis Methods:

Data were fitted with exponential functions using nonlinear least-squares procedures. X-ray data were refined using standard crystallographic software. Kinetic equations were solved numerically and analytically to model the ESIPT and excimer dynamics.