Synthesis, crystal growth, spectral, optical, mechanical, sensor and thermal characterizations of 2-amino-5-chloropyridinium-p-toluenesulphonate crystals

Abstract

The 2-amino-5-chloropyridinium-p-toluenesulphonate (2A5CPPTS) is grown by slow evaporation solution growth method at room ambience. The grown crystal is recrystallized to get the pure 2A5CPPTS compound. The lattice parameters of 2A5CPPTS are a = 8.6563 Å, b = 12.9008 Å, and c = 12.1712 Å and the crystal is of the type of monoclinic nature with space group is P2₁/n. The structure of the 2A5CPPTS organic crystal is identified by the proton and carbon NMR studies and TEM with 50 nm. The 2A5CPPTS crystal ORTEP plotting with a 50% chance of the thermal displacement ellipsoids. The functional group of 2A5CPPTS is confirmed by the FTIR spectral analysis. The optical transmittance of 2A5CPPTS crystal is the 50% of transparency with 2 mm thickness, and the cut-off is at 214 nm in Tauc’s plot, and the optical bandgap value is 5.12 eV. The 2A5CPPTS crystalline thermal studies are analyzed thermogravimetrically along with different thermal studies. The dielectric analysis of the 2A5CPPTS crystal is dielectric loss and dielectric constant. The dielectric constant is lower at the higher frequency values, and the higher dielectric constant at lower frequency values. The dielectric value of the crystal decreases with increasing frequency and the field of micro-electronics, the crystal can also be used as a form of protection. The micro-hardness of the crystalline material is greater along when the load value also greater. According to Onitsch, the hardness coefficient data indicates that a softer type of material has a hardness coefficient of more than 1.6 and present case it is 5.1. The method’s decision depends on how effective the chemical etchant in identifying dislocation or non-dislocation zones. At the dislocated locations, the etch pattern forms when the surface is appropriately etched. The sensor work is measured for room temperature based LED work and its sensitivity is compared for normal and pressure-based work with % value and with humidity data for 2A5CPPTS crystal. Also, the powder XRD data with Laue’s pattern is provided for better understanding.