Synthesis, growth, and characterization studies of pure diphenylamine adipate crystal (DPA)
摘要
A novel metal-organic single crystal of Diphenylamine Adipate (DPA) was successfully synthesized using the slow evaporation method at room temperature. Structural analysis confirmed that DPA crystallizes in a monoclinic system, with its formation validated by powder X-ray diffraction. FT-IR spectroscopy revealed the presence of key functional groups, while UV–Vis analysis indicated a wide optical transparency range, a band gap of 3.25 eV, and a cut-off wavelength at 450 nm, supporting its suitability for nonlinear optical (NLO) applications. Thermal analysis revealed that the material exhibits thermal stability up to 190 °C, with complete decomposition occurring at 600 °C. Surface morphology examined through SEM imaging displayed characteristic rock-layer-like features, indicating a well-defined microstructure. Elemental composition was confirmed by EDAX analysis, verifying the presence of expected constituent elements. Photoluminescence studies showed strong blue emission, suggesting efficient intramolecular charge transfer and potential applicability in optoelectronic or sensing devices. Second harmonic generation (SHG) measurements showed enhanced NLO efficiency compared to standard KDP. These findings highlight the potential of DPA crystals for use in optoelectronic and photonic device applications.