1：Experimental Design and Method Selection:

The study used hydrothermal microwave (HTMW) treatment for ion exchange reactions and homogeneous hydrolysis to synthesize intercalated layered rare-earth hydroxides (LRHs). Two main approaches were employed: ion exchange between pre-synthesized LRHs and anion solutions, and one-pot synthesis by hydrolyzing rare-earth salts in the presence of anions.

2：Sample Selection and Data Sources:

Samples included Eu-doped yttrium hydroxynitrate and its ion exchange products with phthalate, isophthalate, terephthalate, 2-, 3-, and 4-sulphobenzoate anions. Reagents were sourced from suppliers like Lanhit, Sigma Aldrich, Vekton, Alfa Aesar, and Component-reaktiv.

3：List of Experimental Equipment and Materials:

Equipment included a Berghof Speedwave MWS-4 microwave unit, Teflon autoclaves, Bruker D8 Advance diffractometer, Carl Zeiss NVision 40 SEM, Carlo Erba Instruments EA 1108 CHN analyzer, Bruker ALPHA FTIR Spectrometer, Perkin Elmer LS-55 luminescence spectrophotometer, and synchrotron radiation sources. Materials included yttrium nitrate, europium nitrate, hexamethylenetetramine, various acids and salts, and deionized water.

4：Experimental Procedures and Operational Workflow:

For ion exchange, (Y0.95Eu0.05)2(OH)5NO3·nH2O was dispersed in anion solutions and treated at 25°C or 200°C via HTMW. For one-pot synthesis, mixtures of YCl3, HMTA, and anions were HTMW treated. Products were separated by centrifugation, washed, and dried. Characterization involved XRD, SEM, CHNS analysis, IR spectroscopy, luminescence measurements, and single-crystal X-ray diffraction.

5：95Eu05)2(OH)5NO3·nH2O was dispersed in anion solutions and treated at 25°C or 200°C via HTMW. For one-pot synthesis, mixtures of YCl3, HMTA, and anions were HTMW treated. Products were separated by centrifugation, washed, and dried. Characterization involved XRD, SEM, CHNS analysis, IR spectroscopy, luminescence measurements, and single-crystal X-ray diffraction. Data Analysis Methods:

5. Data Analysis Methods: XRD data were analyzed using Scherrer equation for particle size. IR spectra were interpreted for functional groups. Luminescence spectra were recorded and ratios calculated. Structural data were refined using SHELXTL software.