Surface-Enhanced Raman Scattering of 2,2′-Bipyridine Adsorbed on Colloidal Silver and Stabilized AgBr Sols

Kamyshny, Alexander; Zakharov, V. N.; Fedorov, Yu. V.; Galashin, A.E.; Aslanov, L. A.

doi:10.1006/jcis.1993.1244

Cited by 35 publications

(38 citation statements)

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“…4. The assignment of the experimental bands to the normal modes of vibration for the anti conformer of 1 were made on the basis of the potential energy distribution (PED) in terms of symmetry coordinates, using the B3LYP/6‐311++G** data and taking into account the corresponding assignment of related molecules 61–76. The assignment of the vibrational normal modes and the PED based on the 6‐311++G** basis set are shown in Table 7, while those obtained with the 6‐31G* basis set are shown in Table S2.…”

Section: Resultsmentioning

confidence: 99%

Structural and vibrational study of 2‐(2′‐ furyl)‐4,5‐1H‐dihydroimidazole

Zinczuk

Ledesma

Brandán

et al. 2009

J of Physical Organic Chem

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In this study 2-(2(-furyl)-4,5-1H-dihydroimidazole (1) was prepared and then characterized by infrared, Raman, and multidimensional nuclear magnetic resonance (NMR) spectroscopies. The crystal and molecular structures of 1 were determined by X-ray diffraction methods. The density functional theory (DFT) and second-order Møller-Plesset theory (MP2) with Pople's basis set show that there are two conformers for the title molecule that have been theoretically determined in the gas phase, and that only one of them, conformer I, is present in the solid phase. NMR spectra observed for 1 were successfully compared with the calculated chemical shifts at the B3LYP/6-311RRG ** level theorized for this conformer. The harmonic vibrational frequencies for the optimized geometry of the latter conformer were calculated at the B3LYP/6-311RRG ** level in the approximation of the isolated molecule. For a complete assignment of the IR and Raman spectra in the solid phase of 1, DFT calculations were combined with Pulaý s scaled quantum mechanics force field (SQMFF) methodology to fit the theoretical frequency values to the experimental ones.

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Section: Resultsmentioning

confidence: 99%

Structural and vibrational study of 2‐(2′‐ furyl)‐4,5‐1H‐dihydroimidazole

Zinczuk

Ledesma

Brandán

et al. 2009

J of Physical Organic Chem

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“…In literature, chloride ions are often used with two apparently conflicting reasons. Most authors are in agreement about its stabilizing action under acidic or salt form (16,17) and about its coadsorption on particular sites which favor the SERS detection of molecules like bipyridine (18). In other works, chloride salts (MgCl 2 ) are used as aggregating agents (19), probably through the cation property or the strong concentration introduced, since the complexation of Mg 2ϩ with various ligands (OH…”

Section: Fig 2 (S) Titration Curve Of a Silver Colloid (A) By Hno 3 10mentioning

confidence: 80%

Aggregation of Silver Hydrosols Prepared in Air

Teiten

Burneau

1998

Journal of Colloid and Interface Science

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“…The preparation of aqueous dispersions of silver nanoparticles is usually carried out by the chemical reduction of an appropriate silver salt by reducing agents, such as sodium and potassium borohydrides, [22,23] trisodium citrate, [24][25][26] hydrazine, ascorbic acid, hydrocarbons, and gaseous hydrogen. [27] To prevent agglomeration and precipitation and to obtain stable silver nanodispersions, a number of substances, such as polyelectrolytes and nonionic polymers, [27][28][29][30] ionic and nonionic surfactants, [31,32] and so on, were used.…”

Section: Silver Nanoparticles For Printing Conductive Patternsmentioning

confidence: 99%

“…[26,33] Nevertheless, stable nanodispersions described till now, had a low concentration of silver, up to about 0.1 wt.-%, even in the presence of stabilizers. [22][23][24]29,31,34] The only report on concentrated water-based dispersions of silver nanoparticles ($3 wt.-%) was published by Sondi et al [28] who used very high concentrations of stabilizer compared with the silver. Obviously, if the stabilizer-to-silver ratio is too high, it will be impossible to obtain conductive patterns after printing, since the layer of an organic insulator will prevent direct contact between pattern-forming conductive particles.…”

Section: Silver Nanoparticles For Printing Conductive Patternsmentioning

confidence: 99%

Ink‐Jet Printing of Metallic Nanoparticles and Microemulsions

Kamyshny

Ben-Moshe

Aviezer

et al. 2005

Macromol. Rapid Commun.

210

129

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Summary: Two types of ink‐jet inks are presented: ink containing an aqueous dispersion of silver nanoparticles and an oil‐in‐water microemulsion‐based ink. The metallic ink contains nanoparticles of silver, which are formed in the presence of an ionic polymeric stabilizer. Sintering of the printed image obtained with the use of such silver‐based inks at temperatures as low as 300 °C results in formation of patterns possessing noticeable conductivity. The microemulsion inks are based on a thermodynamically stable microemulsion, in which the dispersed oil phase is a volatile solvent containing a water‐insoluble colorant. After contact of the jetted ink droplets with a substrate, nanodroplets of the microemulsion are converted into nanoparticles of the solubilized colorant. In some cases, it was found that the evaporation of microemulsion ink droplets leads to formation of rings composed of ordered nanoparticles.Scheme of ink‐jet printing of an oil‐in‐water microemulsion followed by conversion of the nanodroplets into nanoparticles, caused by quick evaporation of the solvent within the microemulsion droplets. Therefore, the ink behaves as a dye‐based ink prior to printing, but after printing it behaves like a pigment‐based ink.magnified imageScheme of ink‐jet printing of an oil‐in‐water microemulsion followed by conversion of the nanodroplets into nanoparticles, caused by quick evaporation of the solvent within the microemulsion droplets. Therefore, the ink behaves as a dye‐based ink prior to printing, but after printing it behaves like a pigment‐based ink.

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Surface-Enhanced Raman Scattering of 2,2′-Bipyridine Adsorbed on Colloidal Silver and Stabilized AgBr Sols

Cited by 35 publications

References 0 publications

Structural and vibrational study of 2‐(2′‐ furyl)‐4,5‐1H‐dihydroimidazole

Structural and vibrational study of 2‐(2′‐ furyl)‐4,5‐1H‐dihydroimidazole

Aggregation of Silver Hydrosols Prepared in Air

Ink‐Jet Printing of Metallic Nanoparticles and Microemulsions

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