Synthesis and studies of manganese mercury thiocyanate glycol mono-methyl ether crystals for structural, electronic, dielectric, sensor and piezoelectric functionalities by theory and practice

Manganese Mercury Thiocyanate Glycol MonoMethyl Ether (MMTCGMME) crystal is grown at room temperature by slow evaporation technique. The sample grown is confirmed by single crystal XRD and CHNSO analysis for elements. The single crystalline XRD of MMTCGMME crystal are 16.2052 Å, 7.2981 Å, and 13.5099 Å for a, b, c. The crystalline system is orthorhombic with space group as Pca2₁ which is the non-centrosymmetric type. The cut-off wavelength of MMTCGMME crystal is 206 nm is confirmed by absorbance spectrum. The bandgap value as 6 eV is confirmed by Tauc’s plot for photonic use. The SEM morphological representation shows that there is no flaws and no defects in MMTCGMME. Phase matching provisioning of the MMTCGMME crystal material for particle size is observed that compared to KDP 1.845 times having higher second-order NLO coefficients than KDP. The MMTCGMME crystal has very low value of dielectric constant at higher frequencies and it is having higher dielectric constant value at lower frequency range is important for material and device fabrication The fluorescence analysis is reported with the emission at 489 nm for the excitation value of 250 nm of bluish green fluorescence emission. The piezoelectric coefficient is 5.2 pC/N for MMTCGMME. The red LED-based sensitivity is 8% at the room temperature of 28.9 °C.