Irradiated D32DMBC crystals: Growth, characterization, and applications in optics, sensing, and phase-matching

The Diethyl 3,3′-[(2,4-dichlorophenyl) methylidene]bis(1H-indole-2-carboxylate) – (D32DMBC) crystals are grown by the slow evaporation solution growth method with 94 % yield. The D32DMBC crystal compound is a colorless block-like crystal with good quality; the single crystal XRD data confirms the monoclinic type and the space group as P2₁/c. The D32DMBC crystalline functional group is confirmed by FTIR spectrum and the cut-off wavelength of different scaling is observed from the absorption spectrum by the Cobalt-60 source for gamma-irradiation gives D32DMBC-100Gy is 343 nm, D32DMBC-500Gy is 345 nm, D32DMBC-5000Gy is 346 nm and D32DMBC-10000Gy is 348 nm. The Tauc’s plot represents the band gap value of D32DMBC crystal for different scaling is 3.6 eV, 3.59 eV, 3.58 eV, 3.56 eV, and 3.54 eV the SHG-NLO efficiency of the D32DMBC in different scales such as pure, 100Gy, 500Gy, 5000Gy, and 10000Gy are 1.16, 1.17, 1.18, 1.24, and 1.29 times that of KDP, and phase matching effectiveness also increased manner. The D32DMBC is double the input frequency for D32DMBC-100Gy, D32DMBC-500Gy, D32DMBC-5000Gy, and D32DMBC-10000Gy in the BAT-62 diode, compared to the pure D32DMBC crystal. The thermal studies of the DTA and TGA values of D32DMBC-100Gy are 148^oC and 144^oC is observed, D32DMBC-100Gy crystal shows a sharp peak representing a better crystalline nature and it is 75 % entirely decomposed after 197^oC. The variation of pure D32DMBC and D32DMBC-100Gy is 1^oC. The room temperature-based red LED glow of the temperature sensor is in % as 9, 7, 8, and 1 for D32DMBC-100Gy, D32DMBC-500Gy, D32DMBC-5000Gy, and D32DMBC-10000Gy and 100 Gy, is preferred as the highest %.