Details

Autor(en) / Beteiligte

• Nivetha, K.
• Madhuri, W.

Titel

Structural, spectral, thermal, and optical studies of stilbazolium derivative crystal: (E)-4-(3-hydroxy-4-methoxystyryl)-1-methyl pyridinium iodide monohydrate

Ist Teil von

• Optics and laser technology, 2019-01, Vol.109, p.496-503

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •Stilbazolium derivative crystal HMSI was synthesized by Knoevenagel condensation.•It is transparent in the entire visible region with a lower cutoff of 450 nm.•The HMSI crystal exhibits strong RSA and self-focusing effect.•Third-order nonlinear optical susceptibility was found to be 9.89 × 10−6 esu. In the current research, (E)-4-(3-hydroxy-4-methoxystyryl)-1-methyl pyridinium iodide monohydrate (HMSI) has been prepared through Knoevenagel condensation and crystallized by slow evaporation technique. Crystallographic analysis has been carried out to study the crystal structure and unit cell parameters. The fundamental vibration frequencies of specific chemical functional groups were detected by infrared absorption spectrum. Further the molecular structure of the grown crystal was confirmed by nuclear magnetic resonance spectroscopic analysis. Thermal stability (145 °C) and meting point (248 °C) of the HMSI material have been elaborated by means of thermogravimetric and differential scanning calorimetric (TG/DSC) analysis. The crystal was found to be transparent above 460 nm with the band gap of 2.63 eV obtained from transmission spectral analysis. The growth features of HMSI crystal were examined to check for the defects using an optical microscope. Crystal surface damage by Nd: YAG laser at 1.064 μm radiation was measured to be 1.98 GW/cm2. Further, the nonlinear response of HMSI has been studied using Z-scan technique and it was found that the title crystal is capable of exhibiting self-focusing nature with reverse saturable absorption. The evaluated nonlinear susceptibility is in the order of 10−6 esu which is slightly higher compared to other third-order stilbazolium derivative crystals.