Synthesis spectroscopic studies

Yang X, Jiang X, Zhao C, Chen R, Qin P, Sun L (2006) Donor-acceptor molecules containing thiophene chromophore synthesis, spectroscopic study and electrogenerated chemiluminescence. Tetrahedron Lett 47 4961 -964... 

Zincke salts have played an important role in the synthesis of NAD /NADH coenzyme analogs since a 1937 report on the Zincke synthesis of dihydropyridine 7 for use in a redox titration study.The widely utilized nicotinamide-derived Zincke salt 8, first synthesized by Lettre was also used by Shifrin in 1965 for the preparation and study of NAD /NADH analogs. In 1972, Secrist reported using 8 for synthesis of simplified NAD analogs such as 10 for use in spectroscopic studies (Scheme 8.4.4). Subsequent utilization of 8 is discussed later in this article. 

Rubin recently disclosed the synthesis of ortho/meta-I DM 121 [74]. The molecule is formed by dimerization of deprotected 122, which in turn can be synthesized in a few steps and in sizable quantity [Eq. (5)]. The UCLA group was interested in zipping up polyacetylenic systems like 121 to prepare fullerenes (vide infra). Unfortunately, MALDl mass spectroscopic studies showed that 121... 

Chen S, Truax LA, Sommers JM (2000) Alkanethiolate-protected PbS nanoclusters Synthesis, spectroscopic and electrochemical studies. Chem Mater 12 3864-3870... 

Uson, R., Laguna, A., De la Orden, M.U., Parish, R.V. and Moore, L.S. (1985) Synthesis and gold-197 Moessbauer spectroscopic studies of dihalo (pentafluorophenyl) (bidentate ligand) gold(III) complexes. JoumoJ of Organometallic Chemistry, 282(1), 145-148. 

P-NMR spectroscopic studies on the reaction course of the dinucleotide synthesis from 3 -0-acetylthymidine 5 -phosphate (pT-Ac) (180a) and 5 -0-trityl-thymidine (Tr-T) in the presence of triisopropylbenzenesulfonyl chloride (TPS) confirm the metaphosphate hypothesis 123,124). Successive addition of 0.5 equiv. 

He X, Bell AF, Tonge PJ (2002) Synthesis and spectroscopic studies of model red fluorescent protein chromophores. Org Lett 4 1523-1526... 

Jagodic, V., Bozic, B., Tusek-Bozik, L., and Herak, M.J., Synthesis and spectroscopic studies of some quinolylmethylphosphonates, /. Heterocycl. Chem., 17, 685, 1980. 

Altoff, W., Fild, M., Rieck, H.-R, and Schmutzler, R., Synthesis and NMR spectroscopic studies of phosphorus compounds with vinyl and ethynyl groups, Chem. Ber., Ill, 1845, 1978. 

Amiens, C. et al., Selective synthesis, characterization, and spectroscopic studies on a novel class of reduced platinum and palladium particles stabilized by carbonyl and phosphine ligands, J. Am. Chem. Soc., 115, 11638, 1993. 

The existence of difluorochlorates of sodium, potassium, and barium was reported in 1965 by Mitra (19S). However, this claim was met by skepticism since the reported synthesis involved the use of 40% aqueous hydrofluoric acid. In a subsequent paper (J96), Mitra withdrew his claim. In 1969, Huggins and Fox reported (141,142) the synthesis of CSCIF2O2 from CsF and FCIO2, and a subsequent spectroscopic study by Christe and Curtis showed (54) that the vibrational spectrum of the adduct is consistent with a CIF202 anion of symmetry C2V... 

Charlet, L. Manceau, A.A. (1992a) X-ray absorption spectioscopic study of the sorption of Cr(III) at the oxide/water interface. II. Adsorption, coprecpitation, and surface precipitation on hydrous ferric oxide. J. Colloid Interface Sd. 148 443-458 Charlet, L. Manceau, A.A. (1992) X-ray absorption spectroscopic study of the sorption of Cr(III) at the oxide-water interface. J. Colloid Interface Sd. 148 425-442 Chatellier, X. Fortin, D. West, M.M. Leppard, G.G. Ferris, F.G. (2001) Effect of the presence of bacterial surfaces during the synthesis of Fe oxides by oxidation of ferrous ions. Fur. J. Mineral. 13 705-714 Cheetham, A.K. Fender, B.E.F. Taylor, R.I. (1971) High temperature neutron diffraction study of Fei. O. J. Phys. C4 2160-2165 Chemical Week (1988) Glidderfs anti rust secret is out." 15 10... 

The tetraanionic [H2O Al3(/r-OH)(/r-OR)3]" [R = C(CH2C02)2C02] moiety has been achieved by the combination of (H20)9 Al(N03)3 with citric acid [101], with the synthesis establishing the existence of polynuclear complexes of a type previously postulated [102, 103], Al NMR spectroscopic studies have established that the tris(aluminium) cluster (Section 3.2.5) is not fluxional in D2O but instead retains three distinct metal environments over a wide pH range (3.0-9.0) with acid hydrolysis occurring below pH 3.0 and the resultant spectrum revealing the presence of [(H2O), (RO)Al3] and/or [(H20) (ROH) A13] " and also [(HjOlg Al] "" [101]. 

All the methods used to evaporate metals for atom synthesis were developed originally for the deposition of thin metal films. The more important of these techniques are shown schematically in Fig. la-d. Most of the evaporation devices can be scaled to give amounts of metal ranging from a few milligrams per hour for spectroscopic studies to 1-50 gm/hour for preparative synthetic purposes. Evaporation of metals from heated crucibles, boats, or wires (Fig. la-c) generally gives metal atoms in their ground electronic state. Electronic excitation of atoms is possible when metals are vaporized from arcs, by electron bombardment, or with a laser beam (Fig. Id). The lifetime of the excited states of... 

Costes, J.-P. Dupuis, A. Commenges, C. Lagrave, S Laurent, J.-P. Mononuclear lanthanide complexes of tripodal ligands synthesis and spectroscopic studies. Inorg. Chim. Acta 1999, 285, 49-54. 

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