1：Experimental Design and Method Selection:

The study involved the synthesis and structural characterization of two dinuclear lanthanide complexes using a pentadentate ligand. The methodology included thermogravimetric experiments, powder X-ray diffraction (XRD), magnetic susceptibility measurements, and fluorescent spectra analysis.

2：Sample Selection and Data Sources:

The complexes were synthesized from reactions involving Ln(NO3)3·6H2O, KI, and H2L in MeCN with Et3N. Single-crystal X-ray diffraction data were collected for structural analysis.

3：3N. Single-crystal X-ray diffraction data were collected for structural analysis. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment used included a TGA/NETZSCH STA-449C instrument, Quantum Design MPMS (SQUID)-XL magnetometer, PPMS-9T system, and Edinburgh Instruments analyzer model FLS

4：Experimental Procedures and Operational Workflow:

9 The synthesis involved refluxing a mixture of chemicals in MeCN, followed by filtration and crystallization. The structures were solved by direct method and refined using the SHELXTL-2017 program.

5：Data Analysis Methods:

Magnetic data was fitted by Curie–Weiss equation, and luminescence properties were analyzed through excitation and emission spectra.