Quadratic nonlinear-optical properties of a new transparent and highly efficient organic–inorganic crystal: 2-amino-5-nitropyridinium-dihydrogen phosphate (2A5NPDP)

Synthesis and crystal structure of guanidinium L-monohydrogentartrate: encapsulation of an optically nonlinear octupolar cation

“…Moreover, organic salts that are built up through short hydrogen bonds are often less sensitive than molecular compounds to external chemical agents and offer mechanical and thermal properties approaching those of minerals. Use of the (H2PO4),, flexible polyanion in the crystal engineering of layered polar materials has recently been studied (Aekeroy, Hitchcock, Moyle & Seddon, 1989;Masse & Durif, 1990) and is exemplified by the 2-amino-5-nitropyridinium dihydrogenmonophosphate crystal (Masse & Zyss, 1991), which exhibits interesting nonlinear-optically efficient properties (Kotler, Hierle, Josse, Zyss & Masse, 1992). In the present case, the synthesis of guanidinium Lmonohydrogentartrate is an approach aiming at the encapsulation of guanidinium cations between helical chains formed by the aggregation of Lmonohydrogentartrate anions with the potential to organize the corresponding cations in an acentric layered or one-dimensional framework.…”

“…A complete description of such groups denoted as 'octupolar' point groups whereby all observable quantities of dipolar symmetry strictly vanish is given by Zyss (1992). Expressions for the associated /3 tensors and an intrinsic character-table-based identification procedure for multipolar groups are also detailed.…”

Experimental and theoretical studies of the second- and third-order NLO properties of a semi-organic compound: 6-Aminoquinolinium iodide monohydrate

“…Zyss and Oudar [59] deduced relations between the macroscopic and molecular second-order optical nonlinearities for the case of a two-dimensional molecular unit. For the point group 222, b XY Z = sin 2Φ cos α(β yxx − β yyy sin 2 α) − β xyy cos 2Φ sin 2α (6) where α is the angle between the molecular plane and the macroscopic axis Y (crystallographic b axis) and Φ is the angle between the molecular plane and the macroscopic X (crystallographic a axis). See figures 1 and 2 on reference [59] for the definition of the macroscopic crystalline and microscopic molecular axis.…”

“…For this reason the crystal engineering strategy of combining organic and inorganic moieties was proposed with the objective of building more cohesive crystalline structures [5]. Several examples of hybrid organic-inorganic crystals have emerged as good candidates for NLO materials [6,7,8,9]. These systems exhibit high nonlinear optical efficiency in the visible region and good thermal and mechanical stability compared with those of purely organic crystals.…”

Studies on the growth aspects and characterization of sodium para-nitro phenolate single crystals for nonlinear optical applications

“…The crystals are classified in to three categories as organic, inorganic and semi organic single crystals depending upon the raw chemicals used for the growth of single crystals. Since the semi organic single crystals possess the good properties of both organic and inorganic crystals, scientists and researchers focused their interest in growing variety of semi organic single crystals [1][2][3]. Para nitro phenol was identified as potential organic material which gives variety of derivatives with alkali metal hydroxides [4][5][6][7][8][9][10].…”