Spectroscopic Characterization of Self-Assembled Macrocycle Monolayers on Gold

Kalyuzhny, Gregory; Vaskevich, Alexander; Matlis, Sophie; Rubinstein, Israel

doi:10.1515/revac.1999.18.5.237

Cited by 12 publications

(18 citation statements)

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“…CoTPP Bound to Au Surface Through N-Donor Ligand Monolayers. 4MP and 4ATP form ordered monolayers on gold, exposing pyridine (4MP) or aniline (4ATP) groups that can be used for binding of various molecules and metal ions 6,29,30 (as shown schematically in Figure 1). Atomically resolved STM images of SAMs of 4MP have been reported recently.…”

Section: Resultsmentioning

confidence: 99%

“…To our knowledge, the first mention of UV/vis spectroscopy using ultrathin gold films was the study of RNase A labeled with eosin-5-isothiocyanate adsorbed on methyl- and hexaethyleneglycol-terminated SAMs. , Later, a similar approach was utilized for the characterization of iron porphyrin−ferrocene−thiol molecules, self-assembled on ultrathin gold film, demonstrating light-induced electron transfer . This method was also used to study the binding of metallo-macrocycle molecules to SAMs by axial coordination. − Thicker gold films were utilized for the UV/vis study of Langmuir−Blodgett films of 5-(4- N -octadecylpyridyl)-10,15,20-tri- p -tolylporphyrin. , The thickness of the gold films used for UV/vis transmittance measurements varied between 50 and 200 Å.…”

Section: Introductionmentioning

confidence: 99%

“…4 This method was also used to study the binding of metallo-macrocycle molecules to SAMs by axial coordination. [5][6][7] Thicker gold films were utilized for the UV/vis study of Langmuir-Blodgett films of 5-(4-Noctadecylpyridyl)-10,15,20-tri-p-tolylporphyrin. 8,9 The thickness of the gold films used for UV/vis transmittance measurements varied between 50 and 200 Å.…”

Section: Introductionmentioning

confidence: 99%

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UV/Vis Spectroscopy of Metalloporphyrin and Metallophthalocyanine Monolayers Self-Assembled on Ultrathin Gold Films

et al. 2000

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The use of evaporated ultrathin gold films on mica to obtain transmission UV/vis spectra of monomolecular overlayers containing chromophores is demonstrated. The gold substrates (thickness, 13-100 Å) were studied by scanning force microscopy, UV/vis spectroscopy, and X-ray diffraction and found to exhibit an array of {111} textured islands, whose sizes and optical properties can be controlled by the evaporation conditions and subsequent annealing. The use of gold substrates of this kind enables one to clearly resolve UV/vis absorption spectra of (sub)monolayers. This methodology is applied to the study of the binding of cobalt and iron tetraphenylporphyrins (CoTPP and FeTPPCl, respectively) and cobalt phthalocyanine (CoPc) to various N-donor ligand monolayers, self-assembled on ultrathin gold films. Enhancement of the gold surface plasmon absorption, resulting from molecular self-assembly on the gold island film, is used to semiquantitatively follow porphyrin binding to the monolayer.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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UV/Vis Spectroscopy of Metalloporphyrin and Metallophthalocyanine Monolayers Self-Assembled on Ultrathin Gold Films

et al. 2000

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“…Continuous films with a small roughness show a minimum absorbance around 550 nm. Such films are used as optically transparent electrodes in spectroelectrochemistry,3, 4 as well as substrates for molecular self‐assembly, and allow characterization of monolayers containing chromophores by transmission UV/Vis spectroscopy 5–15. On the other hand, ultrathin (ca.=10 nm) island‐type Au films deposited on transparent substrates exhibit transmission spectra that are strikingly different, showing an absorption band attributed to excitation of the surface plasmon (SP), similar to various systems consisting of dispersed Au particles 1, 2.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, ultrathin (ca.=10 nm) island‐type Au films deposited on transparent substrates exhibit transmission spectra that are strikingly different, showing an absorption band attributed to excitation of the surface plasmon (SP), similar to various systems consisting of dispersed Au particles 1, 2. The morphology of such films is controlled by the evaporation parameters 15–18…”

Section: Introductionmentioning

confidence: 99%

Transmission Surface-Plasmon Resonance (T-SPR) Measurements for Monitoring Adsorption on Ultrathin Gold Island Films

et al. 2002

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Evaporation of ultrathin (1.3–10 nm nominal thickness) gold films onto quartz or mica leads to the formation of a layer of rather uniform gold islands on the transparent support. The morphology of ultrathin gold island films of various thicknesses was studied by using atomic force microscopy (AFM) and scanning electron microscopy (SEM) imaging. The surface plasmon (SP) absorption characteristic of such films is highly sensitive to the surrounding medium, with the plasmon band changing in intensity and wavelength upon binding of various molecules to the surface. The binding process can be monitored quantitatively by measuring the changes in the gold SP absorption, by using transmission UV/Vis spectroscopy. The method, termed transmission surface plasmon resonance (T‐SPR) spectroscopy, is shown to be applicable to both chemically and physically adsorbed molecules, in liquid or gas phase, with measurements carried out either ex situ or in situ (real‐time measurements) using a variety of molecular probes. Binding to a preformed molecular layer on the Au surface produces a similar response, suggesting the possible use of T‐SPR for selective sensing. The sensitivity of T‐SPR spectroscopy in detecting molecular binding to the gold depends strongly on the film preparation conditions, and may be comparable to that obtained in surface plasmon resonance (SPR) sensing.

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Metal Substrates for Self‐assembled Monolayers

Schneeweiss

Rubinstein

2007

Encyclopedia of Electrochemistry

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The sections in this article are Introduction General Considerations Regarding Substrates Specific Requirements Imposed by Analysis Techniques Polycrystalline, Textured, Single‐crystalline Substrates Major Aspects Regarding Substrate Preparation/ Pretreatment Substrates Used for SAM Preparation Gold Gold Films on Various Supports Bulk Gold Gold Beads Oxidized Gold Other Gold Substrates for Special Applications Comparative Studies Silver Silver Films on Supports Bulk Silver Copper Copper Films on Supports Bulk Copper Copper Oxide Iron Aluminum Platinum Nickel Titanium Stainless Steel Mercury

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Spectroscopic Characterization of Self-Assembled Macrocycle Monolayers on Gold

Cited by 12 publications

References 0 publications

UV/Vis Spectroscopy of Metalloporphyrin and Metallophthalocyanine Monolayers Self-Assembled on Ultrathin Gold Films

UV/Vis Spectroscopy of Metalloporphyrin and Metallophthalocyanine Monolayers Self-Assembled on Ultrathin Gold Films

Transmission Surface-Plasmon Resonance (T-SPR) Measurements for Monitoring Adsorption on Ultrathin Gold Island Films

Metal Substrates for Self‐assembled Monolayers

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