Synthesis, characterization and theoretical study of the structure and second-order nonlinear optical properties of two new Monoazo Schiff-base compounds

New Schiff base modified carbon paste and coated wire PVC membrane electrode for silver ion

“…Salts of metal nitrates or chlorides (all from Merck) were of the highest purity available and used without any further purification except for vacuum drying over P 2 O 5 . Ligand BNSAO was synthesized and purified as described elsewhere [12].…”

Polarizabilities, Hyperpolarizabilities and Analogous Magnetic Properties

“…A large number of reports have been published of calculations on medium sized organic molecules, often using ab initio methods (with basis sets roughly of a size inversely proportional to the size of the molecule) and sometimes supplemented by semi-empirical calculations, especially for frequency dependent properties:-N-(3-fluorophenyl)naphthaldimide, 114 donor/acceptor substituted Schiff bases 115,116 and barbituric acid derivatives substituted with a Schiff base 117 or aniline, 118 2-hydroxy-3-methoxy-N-(2-chloro-benzyl)-benzaldehyde-imine, 119 derivatives of salicylaldimine based ligands, 120 centrosymmetric pyrazine derivatives, 121 substituted stilbene, azoarene and related push-pull molecules, 122 effects of fluorine atoms on nonlinear response of stilbene derivatives, 123 striazine derivatives, 124 pyrazolo-quinoline derivatives, 125 2-(4 0 -amino-2 0 -hydroxyphenyl)-6-nitrobenzmidazole(LEN), 126 tetrathia- [7]-helicenes, 127 monocyclic azines, 128 26 derivatives of 1,5-diphenylpenta-2,4-dien-1-one (DDO) and 18 chalcones, 129 2,3-diketobenzopiperazine, 130 hemicyanine derivatives, 131 tautomeric forms of uracil 132 and its resonance Raman spectrum, 133 methylene blue, thionine and coumarin dyes, 134 benzothiaziole derived push-pull dyes 135 donor/acceptor systems containing 1,3-heteroaromatic p-bridging units(oxazole, imidazole and thiazole), [136][137][138] TPA materials(diphenylacetylene, stilbene and azobenzene), 139,140 azulene derivatives 141 N-helicenes and N-phenylenes, 142 push-pull porphyrins, 143 azo-enaminone compounds, 144 pyrromethene dyes, 145 furamic and thiophenic ethane-1,2-diols. 146 Mandal et al 147 have made a TDHF study of a and b for amino and nitro substituted chromophores containing two hetero aromatic rings.…”

2,2′-[Hexane-1,6-diylbis(nitrilomethylidyne)]diphenol

“…We have recently reported the successful use of some Schiff base compounds in the construction of polyvinyl chloride powder (PVC)-based membrane selective sensors for Co 2+ , Ag + , Fe 3+ and Hg 2+ (Mashhadizadeh & Sheikhshoaie, 2003a,b;Shamspur et al, 2003Shamspur et al, , 2005. Studies on the properties of Schiff bases as NLO materials have been also reported (Jalali-Heravi et al, 2000;Sheikhshoaie et al, 2004Sheikhshoaie et al, , 2006. In view of the importance of this class of compounds, we have undertaken the synthesis of the title compound, (I), which represents a new potential tetradentate Schiff base ligand, and report here its crystal structure.…”