Synthesis, crystal growth and physiochemical characterization of organic NLO crystal: L-ornithinium dipicrate (LODP)

l-Methioninium picrate

“…The main motifs of hydrogen bonding present in the title compound (i.e. hydrogen bonds formed by carboxylic group…phenolic oxygen and amino-group…nitro group oxygen) are also present in other well-known amino acid picrates, excluding L-argininium picrate [13] and L-ornithinium [13,21]. In the former, the carboxylic group is deprotonated and the arginine side chain is bound to the phenolic oxygen of picric acid, whereas in the latter, the carboxylic H-atom of the picrate molecule as switched to the nitro-group.…”

“…Previously, picrates of L-valine [11], L-asparagine [12] and L-arginine, [13] as well as picrates of L-proline [14][15][16][17][18], L-threonine [19,20], Lornithine [13,21] and L-histidine [22][23][24] were discovered. The authors of [10] obtained the previously known L-valinium picrate and a new crystal, L-isoleucinium picrate.…”

Growth, electrical, thermal, mechanical and etching studies on 4-chloroanilinium hydrogen (2R, 3R)-tartrate monohydrate-an organic NLO single crystal

“…On the other hand, increased dielectric constant at higher temperature may be due to the increase in space charge polarization at the grain boundary interfaces. In accordance with Miller rule, the lower value of dielectric constant at higher frequencies is an appropriate factor for the improvement of SHG coefficient [14]. The low value of dielectric loss at higher frequencies suggests that a sample reveals a good optical quality with fewer defects.…”

“…The charge transfer transition is due to promotion of an electron from HOMO of the donor to LUMO of the acceptor. The transmittance in the entire visible region and the absence of absorption between 300 nm and 1100 nm is an advantage as it is the desirable property for the materials possessing SHG properties [14].…”

Investigation on optical, electrical and etching properties of 2-aminopyridinium 4-aminobenzoate: A phase matchable organic single crystal for optoelectronic device applications

“…Hence, they are projected as forefront candidates for the fundamental and applied investigations. In this work, * E-mail: jchandaravind@yahoo.com an attempt has been made to locate a class of organic NLO crystalline materials involving charge transfer mechanism [8]. 2-aminopyridine is one such π-donor-acceptor molecular compound in which 4-aminobenzoic acid gives one of its proton (H + ) to the 2-aminopyridine.…”