1：Experimental Design and Method Selection:

The study involved designing and synthesizing Eu/Tb co-doped complexes [Eu/Tbx(BPA)3phen] with varying Tb3+ concentrations (x = 0.4, 0.7, 1, 1.3, 1.5) to investigate energy transfer and luminescence properties. Electrospinning was used to fabricate composite fibers with PAN to enhance stability and mechanical properties. Theoretical models included Dexter's resonant exchange interaction theory for energy transfer analysis.

2：4, 7, 1, 3, 5) to investigate energy transfer and luminescence properties. Electrospinning was used to fabricate composite fibers with PAN to enhance stability and mechanical properties. Theoretical models included Dexter's resonant exchange interaction theory for energy transfer analysis. Sample Selection and Data Sources:

2. Sample Selection and Data Sources: Analytical-grade chemicals were used, including europium nitrate hexahydrate, terbium nitrate hexahydrate, BPA, phen, PAN, DMF, and ethanol. Complexes were synthesized following a procedure from previous work, and fibers were prepared by mixing PAN and DMF with Eu/Tb1(BPA)3phen powder.

3：List of Experimental Equipment and Materials:

Equipment included a field-emission scanning electron microscope (JSM-7800F; JEOL, Ltd.), Fourier-transform IR spectrometer (Spectrum One B; PerkinElmer Inc.), thermogravimetry analyzer, fluorescence spectrometer (FS5; Edinburgh Instruments, Ltd.), and spectrophotometers (F-7000 and F-4600; Hitachi High-Technologies Corp.). Materials included Eu(NO3)3·6H2O, Tb(NO3)3·6H2O, BPA, phen, PAN, DMF, and ethanol.

4：Experimental Procedures and Operational Workflow:

Complexes were synthesized by mixing ligands and rare-earth salts, followed by characterization using SEM, IR spectroscopy, TG, and fluorescence spectroscopy. Fibers were fabricated via electrospinning from a PAN/DMF solution with added complex, with viscosity measured before and after complex addition. Luminescence properties were evaluated under UV excitation at 290 nm.

5：Data Analysis Methods:

Data were analyzed using fluorescence spectra, decay curves fitted with single-exponential functions, quantum yield calculations, and IR spectral shifts to confirm coordination. Energy transfer efficiencies were compared based on emission intensities and lifetimes.