1：Experimental Design and Method Selection:

Hydrothermal synthesis was used to prepare the compounds. Characterization methods included FT-IR spectra, elemental analysis, single-crystal X-ray structure analysis, PXRD, TGA, UV-vis spectroscopy, and cyclic voltammetry.

2：Sample Selection and Data Sources:

Compounds 1 and 2 were synthesized from precursors like K8Na2[A-α-GeW9O34]·25H2O and Na10[A-α-SiW9O34]·19H2O, with D-tartaric acid or glycolic acid and ZrOCl2·8H2O.

3：2O. List of Experimental Equipment and Materials:

3. List of Experimental Equipment and Materials: Equipment included Bruker D8 Advance XRD diffractometer, Nicolet iS10 FTIR spectrometer, PE2400 II elemental analyzer, Mettler Toledo TGA/DSC 1/1100 analyzer, PerkinElmer Lamda-950 UV-vis spectrophotometer, Q-switched Nd:YAG solid-state laser, CHI 660E electrochemical workstation, and Gemini A Ultra diffractometer. Materials were commercially available chemicals.

4：Experimental Procedures and Operational Workflow:

Synthesis involved stirring reagents in buffer solutions, heating in a stainless steel reactor with Teflon-liner at 100°C for 5 days, cooling, filtration, and drying. Characterization followed standard procedures for each technique.

5：Data Analysis Methods:

Data were analyzed using software like SHELXTL-97 for structure refinement, Kubelka-Munk equation for UV-vis, and standard electrochemical analysis for CV.