SERS of 1,8‐naphthyridine and the Raman spectra of two of its complexes

Griffith, William P.; Koh, Tse Yuen

doi:10.1002/jrs.1250261208

Cited by 7 publications

(5 citation statements)

References 19 publications

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“…It has been reported that there is a close relationship between complexation and adsorption involving organic ligands at silver centers. 25,26,34 There are similarities between the SER spectrum of 2dtpy and the Raman spectrum of its Ag complex, [Ag(2dtpy)]NO 3 (Fig. 2c).…”

Section: Resultsmentioning

confidence: 80%

“…In aromatic systems, similarities between the SER in silver colloids and the Raman spectrum of the Ag complex have been associated with a perpendicular position of the aromatic ring in the silver surface. 25,26,34 The similarities shown in the corresponding spectra of 2dtpy could be related to a perpendicular position of an aromatic ring in the silver surface, according to the adsorption mode of 2dtpy shown in Fig. 3b.…”

Section: Assigned To D(c--h)mentioning

confidence: 80%

“…[19][20][21] A FT-Raman spectrometer was used for recording all spectra shown in this paper, with an excitation wavelength of 1064 nm. This excitation has been largely used for recording good quality SERS spectra on silver; [22][23][24][25][26][27][28] work on the wavelength dependence of SERS has been reported and the need for further studies was pointed out. 29 The 2dtpy ligand shows a very strong SERS signal when adsorbed on silver colloids.…”

Section: Resultsmentioning

confidence: 99%

“…25,26,34 There are similarities between the SER spectrum of 2dtpy and the Raman spectrum of its Ag complex, [Ag(2dtpy)]NO 3 (Fig. 2c).…”

Section: Assigned To D(c--h)mentioning

confidence: 85%

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Adsorption of 2,2′-dithiodipyridine as a tool for the assembly of silver nanoparticles

et al. 2002

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Silver nanostructured thin films stabilized by 2,2'-dithiodipyridine (2dtpy) were prepared. The Ag nanoparticles were obtained by treating the complex [Ag(2dtpy)]NO 3 with NaBH 4 in a methanol-toluene mixture. The films were transferred to borosilicate glass slips by a dip-coating method and were found to consist of Ag nanoparticles possibly linked via 2dtpy molecules. Surface-enhanced Raman scattering (SERS) studies have offered the possibility of investigating the adsorption modes of 2dtpy at the Ag nanoparticle surfaces in the films.

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Section: Resultsmentioning

confidence: 80%

Section: Assigned To D(c--h)mentioning

confidence: 80%

Section: Resultsmentioning

confidence: 99%

“…25,26,34 There are similarities between the SER spectrum of 2dtpy and the Raman spectrum of its Ag complex, [Ag(2dtpy)]NO 3 (Fig. 2c).…”

Section: Assigned To D(c--h)mentioning

confidence: 85%

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Adsorption of 2,2′-dithiodipyridine as a tool for the assembly of silver nanoparticles

et al. 2002

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“…Adsorption of N ‐bases on Ag + adsorption sites on Ag NP surface and the analogy between the surface complexes formed in this manner and the synthetically prepared Ag + complexes have been the subject of numerous studies . The presence of Ag(0) adsorption sites on Ag NPs modified by adsorbed chlorides at fractional surface coverage ≥0.6 (in borohydride‐reduced hydrosols) has been reported by Šloufová et al .…”

Section: Introductionmentioning

confidence: 92%

Identification of two Ag‐2,2′:6′,2″‐terpyridine surface species on Ag nanoparticle surfaces by excitation wavelength dependence of SERS spectra and factor analysis: evidence for chemical mechanism contribution to SERS of Ag(0)–tpy

Šloufová

Procházka

Vlčková

2014

J Raman Spectroscopy

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Measurement and interpretation of the excitation wavelength dependence of surface-enhanced Raman scattering (SERS) spectra of molecules chemisorbed on plasmonic, e.g. Ag nanoparticle (NP) surfaces, are of principal importance for revealing the charge transfer (CT) mechanism contribution to the overall SERS enhancement. SERS spectra, their excitation wavelength dependence in the 445-780-nm range and factor analysis (FA) were used for the identification of two Ag-2,2′:6′,2″-terpyridine (tpy) surface species, denoted Ag + -tpy and Ag(0)-tpy, on Ag NPs in systems with unmodified and/or purposefully modified Ag NPs originating from hydroxylamine hydrochloride-reduced hydrosols. Ag + -tpy is a spectral analogue of [Ag(tpy)] + complex cation, and its SERS shows virtually no excitation wavelength dependence. By contrast, SERS of Ag(0)-tpy surface complex generated upon chlorideinduced compact aggregate formation and/or in strongly reducing ambient shows a pronounced excitation wavelength dependence attributed to a CT resonance (the chemical mechanism) contribution to the overall SERS enhancement. Both the resonance (λ exc = 532 nm) and off-resonance (λ exc = 780 nm) pure-component spectra of Ag(0)-tpy obtained by FA are largely similar to surface-enhanced resonance Raman scattering (λ exc = 532 nm in resonance with singlet metal to ligand CT ( 1 MLCT) transition) and SERS (λ exc = 780 nm) spectra of [Fe(tpy) 2 ] 2+ complex dication.

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Surface adsorption of 4,4′‐dithiodipyridine and 2,2′‐dithiodipyridine on silver nanoparticles

Nogueira

Cruz

Soares‐Santos

et al. 2003

J Raman Spectroscopy

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A detailed vibrational study on the isomers 2,2 -dithiodipyridine and 4,4 -dithiodipyridine was carried out. These organic ligands are of great interest as possible linkers in the fabrication of nanostructures, and therefore a study on the adsorption modes of both ligands at silver surfaces is presented. Orientational information on the 2,2 -dithiodipyridine and 4,4 -dithiodipyridine molecules adsorbed on silver colloids was collected based on the SERS spectra and supported by ab initio calculations. There is evidence that both organic ligands adsorb on the silver surface through the sulfur atoms, with the aromatic rings in a tilted position.

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SERS of 1,8‐naphthyridine and the Raman spectra of two of its complexes

Cited by 7 publications

References 19 publications

Adsorption of 2,2′-dithiodipyridine as a tool for the assembly of silver nanoparticles

Adsorption of 2,2′-dithiodipyridine as a tool for the assembly of silver nanoparticles

Identification of two Ag‐2,2′:6′,2″‐terpyridine surface species on Ag nanoparticle surfaces by excitation wavelength dependence of SERS spectra and factor analysis: evidence for chemical mechanism contribution to SERS of Ag(0)–tpy

Surface adsorption of 4,4′‐dithiodipyridine and 2,2′‐dithiodipyridine on silver nanoparticles

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