1：Experimental Design and Method Selection:

The study involved synthesizing an imidazole-based ionic liquid with sulfone terminals and its coordination compounds with Gd3+, Eu3+, and Tb3+ ions. Characterization methods included NMR, FTIR, Raman, X-ray diffraction, thermal analysis, rheology, UV-vis, and photoluminescence spectroscopy. Computational modeling using MOPAC, ORCA, and LUMPAC software was employed for structural and photophysical analysis.

2：Sample Selection and Data Sources:

Chemicals were purchased from commercial sources (e.g., Aldrich, Vetec). Samples included the synthesized ionic liquid and its lanthanide complexes.

3：List of Experimental Equipment and Materials:

Equipment included Varian Spectrometer 400 MHz for NMR, Perkin Elmer Spectrum for FTIR, Witec Alpha 300s for Raman, TA Instruments DSC 2910 for thermal analysis, TA Instruments DHR rheometer, Varian Cary 5000 spectrophotometer for UV-vis, FLUOROLOG3 ISA/Jobin-Yvon Spectrofluorimeter for photoluminescence, and computational software (MOPAC, ORCA, LUMPAC). Materials included 1-Methyl imidazolium, Bromoethanol, Ethyl acetate, Butanosultone, lanthanide oxides, and ultrapure water.

4：Experimental Procedures and Operational Workflow:

Synthesis involved reacting 1-Methylimidazolium with Bromoethanol to form an intermediate, then with butane-sultone to produce the ionic liquid. Complexes were prepared by mixing the ionic liquid with lanthanide nitrates in acetone/water. Characterization steps included structural analysis (NMR, FTIR, Raman), thermal stability tests, rheological measurements, optical property assessments (UV-vis, photoluminescence), and computational modeling for energy transfer and photophysical parameters.

5：Data Analysis Methods:

Data were analyzed using software tools for spectroscopy (e.g., correction for detector response), rheology (modulus calculations), and photoluminescence (Judd-Ofelt parameters, quantum efficiency calculations). Statistical methods included monoexponential fitting for decay curves and error percentage calculations.