l-Histidine tetrafluoroborate: a solution-grown semiorganic crystal for nonlinear frequency conversion

Abstract

The crystal structure, refractive indices, and phase-matching conditions for a new nonlinear optical material, L-histidine tetrafluoroborate (HFB), are reported. HFB grows readily, displays favorable mechanical characteristics, and has adequate birefringence to permit phase-matched parametric processes over much of its transparency range (250 nm to 1300 nm). The phase-matching loci and angular sensitivity for second-harmonic generation of 1064-nm light in single crystals of HFB were measured. The effective nonlinearity for HFB is comparable with that of beta-barium borate (~2 pm/V), and its angular sensitivity [delta(Deltak)/deltatheta] is somewhat smaller.

HUMO-LUMO Studies on Methyl Orange Doped ZTS Crystals for Laser Applications

“…Numerous natural particles that contain conjugated π electrons are portrayed hyperpolarizabilities and are dissected by method for vibrational spectroscopy [15][16][17]. Much of the time, even without reversal symmetry, the most grounded groups in the Raman range are feeble in the IR range and the other way around.…”

“…Recently Parr et al have defined a new descriptor to quantity, the global electrophilic power of the compound as electrophilicity index (), which defines a quantitative classification of the global electrophilic nature of a compound have proposed electrophilicity index () as a measure of energy lowering due to maximal electron flow between donor and acceptor. They defined electrophilicity index () as  = µ 2 /2 η The usefulness of this new reactivity quantity has been recently demonstrated in understanding the toxicity of various pollutants in terms of their reactivity and site selectivity [16]. The calculated value of electrophilicity index describes the biological activity for Thiourea Methyl orange respectively.…”

Growth and Characterisation of new Semi Organic Crystal Bisthiourea Calciumacetate

“…Due to their large nonlinearity, high resistance to laser induce damage, low angular sensitivity and good mechanical hardness, the semiorganic materials have the potentials for combing the high NLO property and chemical flexibility of organic materials with physical sturdiness and excellent transmittance of inorganic materials. Among the semiorganic NLO materials, metal-complexes of thiourea family have been investigated actively [12][13][14], and a variety of thiourea metal-complex crystals have been grown [15][16][17][18].With large dipole moment and centrosymmetric nature, thiourea has the ability to form a widespread network of hydrogen bonds [19], which produces excellent noncentrosymmetric complexes such as zinc thiourea sulphate (ZTS), bisthiourea cadmium acetate (BTCA), bis thiourea zinc acetate (BTZA), bisthiourea zinc chloride (BTZC), bisthiourea bismuth chloride (BTBC) and bisthiourea cadmium iodide (BTCI) [20][21][22][23][24][25][26]. Motivated by the intriguing properties of this material, an attempt has been made to synthesize and growth of thiourea crystal.…”

Growth, Characterization and NLO activity of Fe (III) doped Ni L-Histidine Hydrochloride Monohydrate Crystals

“…The imadazole pyridine nitrogen is the strongest electron pair donor to the metal ions. Biologically L-Histidine is involved in a large number of biochemical processes and is now used in the treatment of anemia, allergies, rheumatoid arthritis, and other inflammatory reactions [7].…”