1：Experimental Design and Method Selection:

The DMAPNP single crystal was grown by slow evaporation solution growth technique at 35 °C. Various characterization techniques including single crystal X-ray diffraction, FT-IR, FT-Raman, Hirshfeld surface analysis, Mulliken atomic charge population analysis, density of state (DOS), optical transmittance study, photoluminescence (PL) spectrum, photoconductivity analysis, TG–DTA analysis, chemical etching study, Vickers microhardness tester, laser damage threshold analysis, and dielectric properties assessment were employed.

2：Sample Selection and Data Sources:

The DMAPNP single crystal was synthesized using 4-dimethylaminopyridine (4DMAP) and 4-nitrophenol (4NP) in the molar ratio of 1:2 using acetone as a solvent.

3：List of Experimental Equipment and Materials:

Bruker AXS Kappa APEX II CCD X-Diffractometer, PANalytical X’Pert Pro-Diffractometer, Bruker AXS FT-IR spectrometer, BRUKER RFS 27: Standalone FT-Raman Spectrometer, Perkin-Elmer Lambda-35 spectrophotometer, Jobin–Yvon (JY) make fluorolog-FL3-11 spectrofluorometer, Keithley 6487 picoammeter, Perkin-Elmer Diamond TG–DTA instrument, COSLAB optical microscope, Shimadzu HMV-G20 microhardness tester, Q-switched Nd: YAG laser, PSM 1735 LCR meter.

4：Experimental Procedures and Operational Workflow:

The crystal growth, solubility, and morphological analysis were performed. Various characterization studies were conducted to analyze the structural, optical, thermal, mechanical, and dielectric properties of the DMAPNP crystal.

5：Data Analysis Methods:

The data obtained from various characterization techniques were analyzed to determine the crystal structure, functional groups, intermolecular interactions, optical properties, thermal stability, mechanical stability, and dielectric properties of the DMAPNP crystal.