A New Nonlinear Optical Stilbazolium Family Crystal of (E)-1-Ethyl-2-(4-nitrostyryl) Pyridin-1-ium Iodide: Synthesis, Crystal Structure, and Its Third-Order Nonlinear Optical Properties

Abstract

The derivative of an organic stilbazolium single crystal, (E)-1-ethyl-2-(4-nitrostyryl) pyridin-1-ium iodide (hereafter abbreviated as NSPI), was synthesized by the Knoevenagel condensation method. Single crystal of NSPI of size 13 × 12 × 3 mm3 were obtained from a 1:1 ratio of methanol and acetonitrile mixed solvent using the slow evaporation technique. X-ray structural analysis has indicated that NSPI crystallizes in the centric triclinic system with the P1̅ space group. In addition, Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopic analyses were carried out to confirm the molecular structure of the grown crystal. The small energy difference of the frontier molecular orbitals indicates the possible nonlinear optical properties present in the title crystal. Thermal studies confirm that the material has a good thermal stability of about 151 °C. Etching studies provide the layered growth of the NSPI crystal with fewer dislocations. The optical transmission range and the band gap were assessed by UV–vis transmission study. Red emission taking place at 721 nm was identified from a photoluminescence study. The NSPI crystal has good resistance to laser radiation against the Nd:YAG laser at 1064 nm. The third-order NLO efficiency of the NSPI crystal was determined via the Z-scan technique with a He–Ne laser excitation source operating at 632.8 nm.

Core‐Shell Structured Layered Lanthanide‐Organic Complexes with Stilbazolium‐type Dye Encapsulation for Multifunctional Performances

“…[1b, 3, 11] Here, stilbazolium-type dye, 4'-diethylamino-N-methyl stilbazolium iodide (DEAST)I was used as guest because of its high molecular superpolarizability,e lectrooptical coefficient and low dielectric constant. [12] As expected, the (DEAST)I@Ln-LMOCs composites exhibit confined-caused tunable luminescences, higher ion conduction, better photocurrent response performances and higher sensingb ehaviors.B esides, the hostguest interactions were simulated by theoretical calculations.…”

“…It's known to all that the physical properties of organic molecules are determined by the way they aggregate in solids, so the core–shell structures are the efficient strategy for construction of multifunctional materials . Here, stilbazolium‐type dye, 4′‐diethylamino‐ N ‐methyl stilbazolium iodide (DEAST)I was used as guest because of its high molecular superpolarizability, electrooptical coefficient and low dielectric constant . As expected, the (DEAST)I@Ln‐LMOCs composites exhibit confined‐caused tunable luminescences, higher ion conduction, better photocurrent response performances and higher sensing behaviors.…”

Z-scan screening of proton-shifted monohydrated organic salt: the linear, nonlinear, and optical limiting characteristics for photonic applications

“…, where T and t are the transmittance and thickness of the sample respectively [33]. The variation in the estimated absorption coefficient with the photon energy has been plotted in Fig.…”

“…The reason behind designating this protonshifted crystal for the NLO study is that this crystal possesses the proton transferred donor and acceptor moieties with p-conjugation for large intermolecular charge transfer (ICT) in response to high-intense laser radiation. The large intermolecular charge transfer (ICT) in the molecule is regarded as the key factor for high NLO response [33]. Hence it is expected that the present crystal would evince good NLO characteristics.…”

Exploring crystal, electronic, optical and NLO properties of ethyl 4-(3,4-dimethoxy phenyl)-6-methyl-2-thioxo-1,2,3,4-tetrahydro pyrimidine-5-carboxylate (MTTHPC)

“…Most of noncentro/symmetric crystals have a high 2nd harmonic generation (SHG) efficiency surpass centrosymmetric ones. Centrosymmetric crystals possess a remarkable 3rd nonlinear optical behaviors made them right choice for optical sensing, switching, and limiting processes (Amudha et al 2017a, b;Karuppanan and Kalainathan, 2018;He et al2018). The seek for improving their photoconductive characters are carried by tailoring their band offsets (El-Nahass et al 2013;Ibrahim et al 2012Ibrahim et al , 2013Soliman et al 2013) to facilitate electrons rush across conduction domain.…”