Synthesis, growth, structure and spectroscopic characterization of a new organic nonlinear optical hydrogen bonding complex crystal: 3-Carboxyl anilinium p-toluene sulfonate

Investigation on the crystal growth, molecular structure and nonlinear optical susceptibilities of 2-[2-(4-Ethoxy-phenyl)-vinyl]-1-ethyl-stilbazolium iodide (EESI) by Z-scan technique using He–Ne laser for third-order nonlinear optical applications

“…It is found that HOMO -LUMO energy gap value of the EESI is −0.64 eV, which is quite low compared to a well-known urea crystal (6.7063 eV) [32]. This low energy gap value of the title compound is one of the essential features in a NLO system and confirms the most active NLO properties of EESI than the urea crystal [33,34]. Unfortunately, the title crystal crystallized into a centrosymmetric structure hence SHG inactive for EESI crystal.…”

Bulk crystal growth and nonlinear optical characterization of a stilbazolium derivative crystal: 4-[2-(3,4-dimethoxyphenyl)ethenyl]-l methylpyridinium tetraphenylborate (DSTPB) for NLO device fabrication

“…A molecule with a small energy gap is more polarizable, which encourages more active NLO properties of the system and also denes the so nature of the molecule. 29 As seen from Fig. S4, † the HOMO orbitals are only localized on two of the phenyl rings in the tetraphenylborate (counter anion) while the LUMO orbitals are located over the stilbazolium cation except in the methyl groups and the counter anion.…”

Synthesis, Characterisation of Novel NLO Material: bis-L-Phenylalanine Mandelate

“…The single crystal x-ray diffraction measurements were done using a Bruker AXS Kappa APEX II single crystal CCD diffractometer equipped with graphite -monochromated MoKα radiation wavelength 0.71073 Å with a dimension of 0.250*0.200*0.150 mm 3 . Accurate unit cell parameters were determined from the reflections of 17546 in all the three crystallographic axes.…”

“…The structure was resolved in noncentero symmetric space 3 group P2 1 . The present unit cell was indexed to a standard setting of a= 5.4369 (6) Å, b= 16.278(2) Å, c= 14.2654 (17) Å and V=1257.5 Å 3…”