Studies of magnesium chloride and Rhodamine-B doped L-histidine acetate crystals grown by solution method

Salts of magnesium chloride and rhodamine-B doped L-histidine acetate (LHA) were synthesized and single bulk crystals were grown at room temperature (30 °C) by solution method. The grown crystals are observed to be stable, non-hygroscopic, transparent and all the crystals are colourless except rhodamine-B doped L-histidine acetate. Rhodamine-B doped LHA crystals are slightly pink in colour and it reveal the incorporation of Rhodamine-B into the host LHA crystal. By XRD method, it is found that the crystal structure of the doped LHA crystals has not been altered. The relative second harmonic generation (SHG) efficiency was estimated by powder Kurtz-Perry technique. The grown crystals were excited with UV light to get the photoluminescence light output at different wavelengths. Microhardness values have been evaluated by Vickers hardness test. Dielectric parameters such as dielectric constant and dielectric loss of the samples were measured at different frequencies at room temperature. The optical band gap and the transparency of the samples have been determined by UV-visible transmittance studies.