A spectroscopic study of water-soluble pyronin B and pyronin Y in Langmuir–Blodgett films mixed with stearic acid

Meral, Kadem; Erbil, H. Yıldırım; Onganer, Yavuz

doi:10.1016/j.apsusc.2011.10.008

Cited by 32 publications

(10 citation statements)

References 41 publications

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“…for deposition since it stabilizes the monolayer at the liquid-air interface. [32][33][34][35] The Langmuir films were assembled with complexes in two distinct oxidation states, Ru II and Ru III , and the films were named Film 1 and Film 2, respectively. The oxidized species was generated by the reaction with hydrogen peroxide and hydrochloric acid (see experimental section).…”

Section: Electrochemical Studiesmentioning

confidence: 99%

Methyl Ester Functionalized Phenalenyl Arene- and Bipyridine–Ruthenium-Based Complexes for Electroactive Langmuir–Blodgett Films

et al. 2019

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We report the synthesis of a new phenalenyl ligand, functionalized with a methyl ester electron withdrawing group, named 9-hydroxy-1-oxo-1H-phenalen-5-methyl carboxylate (L) and the generated complexes [Ru(bpy)2L]PF6 and [(η 6 -C6H6)Ru(L)Cl]. Compounds were characterized by spectroscopic and X-ray diffraction methods and their electrochemical behavior was investigated via cyclic voltammetry and UV-vis spectroelectrochemistry. The one-electron oxidized compounds have unpaired electron located in the phenalenyl ring, as supported by theoretical calculations (DFT) and EPR results. Langmuir-Blodgett (LB) films deposited by [Ru(bpy)2L] 2+/3+ species mixed with stearic acid are electroactive, showing quasi-reversible

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Section: Electrochemical Studiesmentioning

confidence: 99%

Methyl Ester Functionalized Phenalenyl Arene- and Bipyridine–Ruthenium-Based Complexes for Electroactive Langmuir–Blodgett Films

et al. 2019

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“…8 In the LB technique, the lm architecture is easily controlled by adjusting the exchangeable parameters containing barrier speed, pulling speed, temperature and pH of the subphase, material composition, substrate, deposition pressure and evaporation time. 15 GO sheets are considered as a mimetic amphiphilic molecule with hydrophilic edges and hydrophobic basal plane at the interface 16 since the most suitable materials in LB technique are amphiphilic molecules having hydrophobic and hydrophilic parts. The desired quality of the LB lm of GO sheets and GO basedcomposites can be achieved by adjusting the exchangeable parameters.…”

Section: Introductionmentioning

confidence: 99%

“…The desired quality of the LB lm of GO sheets and GO basedcomposites can be achieved by adjusting the exchangeable parameters. 8,15 This work is of crucial role for preparing GObased composite lms by LB method, since controlling 2D structure of assembled GO sheets and GO-based composites are greatly desired for principal research and GO-based device applications. Considering the studies on the preparation and characterization of GO-based composite formations by LB method are limited, 17,18 we believe that the data presented by this manuscript will make important scientic contributions into the eld.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of morphology controlled graphene oxide-dye composite films at the air–water interface

2015

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This study presents a facile route for preparing two-dimensional (2D) graphene oxide-based composite films by Langmuir-Blodgett (LB) method. Graphene Oxide-Dye composites are formed with the incorporation of GO sheets and dye molecules (Pyronin Y) at the air-water interface, since GO sheets are perfectly capable of forming a floating-layer at the air-water interface. Graphene Oxide-Pyronin Y (PyY@GO) composites are successfully assembled as highly ordered thin films over a glass substrate by 10 LB method. The surface pressure-area (π-A) isotherm studies reveal that pristine GO sheets and PyY@GO composites are capable of forming stable Langmuir films at the air-water interface. The limiting areas of pristine GO sheets and the composites are determined, and the area of pristine GO sheets are found to be larger than that found on PyY@GO composites. This observation clearly indicates the interaction of GO sheets with PyY molecules at the air-water interface, resulting in the formation of 15 PyY@GO composites. Next, the floating layers of GO sheets and PyY@GO composites are successfully transferred to the glass substrate by LB method as mono-and multi-layer films. Their LB films are characterized by SEM and UV-Vis spectroscopy. SEM images reveal that the density of GO sheets and PyY@GO composites on the substrate are tuned by changing the film deposition pressure and the number of layers.

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“…The numbers of dye monomers in the aggregate units affect the type and degree of dye aggregation. 17,[19][20][21][22] It was concluded that H-aggregate formation of PyY is observed at low dye concentrations in solution with certain additives such as clay, colloidal SiO 2 and sodiumdodecylsulphate (SDS), while aggregation of the dye takes place at high concentrations in water. Generally, H-aggregates (face-to-face arrangement of the monomer molecules in the unit) are characterized by a new blue-shifted absorption band compared to that of monomer whereas J-aggregates (side-by-side arrangement of the monomer molecules in the unit) possess a narrow and red-shifted absorption band.…”

Section: Introductionmentioning

confidence: 99%

“…Aggregate formation of the dye in different media has been determined by spectroscopic techniques, and the aggregate type was reported to be H-aggregate. 17,[19][20][21][22] It was concluded that H-aggregate formation of PyY is observed at low dye concentrations in solution with certain additives such as clay, colloidal SiO 2 and sodiumdodecylsulphate (SDS), while aggregation of the dye takes place at high concentrations in water. 17,[19][20][21] As a consequence of this observation, it can be said that the surface used as a template plays a crucial role in the aggregation processes of PyY.…”

Section: Introductionmentioning

confidence: 99%

Graphene oxide sheets as a template for dye assembly: graphene oxide sheets induce H-aggregates of pyronin (Y) dye

et al. 2013

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The highly stable colloidal structure of graphene oxide (GO) in aqueous dispersion behaves as a platform for the molecular aggregation of dyes via a simple adsorption process. The interaction between dye and GO sheets is a critical factor for dye aggregation. Positively charged dyes interact with the negatively charged GO sheets in an aqueous dispersion via both electrostatic and p-p stacking interactions. The cationic nature of Pyronin Y (PyY) ensures that the dye molecules are quickly adsorbed on the GO sheets in the aqueous dispersion. GO-PyY composites with different ratios, which are stable for months, are prepared by simply mixing diluted aqueous dispersions of both components. Transition dipole-dipole interactions between the adsorbed dye molecules on the surface of the GO sheet causes the formation of H-aggregates of the dye at dilute concentrations. H-aggregates of PyY are characterized by spectroscopic techniques (UV-Vis, steady-state and time-resolved fluorescence spectroscopy). The morphology and thickness of the GO sheets and the dye adsorbed GO sheets were determined using atomic force microscopy (AFM) in tapping mode. AFM studies revealed that a great deal of PyY molecules interact on the edges of the GO sheets.3 Electronic supplementary information (ESI) available: Synthesis of graphene oxide (GO), SEM image of natural graphite flakes, EDX spectra of natural graphite flakes and GO, Raman spectra of natural graphite flakes and GO, TGA spectra of natural graphite flakes and GO, cross-sectional analysis of AFM images of GO and PyY adsorbed GO on a mica surface, and absorption spectra of PyY in deionized water and the GO aqueous dispersion. See

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A spectroscopic study of water-soluble pyronin B and pyronin Y in Langmuir–Blodgett films mixed with stearic acid

Cited by 32 publications

References 41 publications

Methyl Ester Functionalized Phenalenyl Arene- and Bipyridine–Ruthenium-Based Complexes for Electroactive Langmuir–Blodgett Films

Methyl Ester Functionalized Phenalenyl Arene- and Bipyridine–Ruthenium-Based Complexes for Electroactive Langmuir–Blodgett Films

Fabrication of morphology controlled graphene oxide-dye composite films at the air–water interface

Graphene oxide sheets as a template for dye assembly: graphene oxide sheets induce H-aggregates of pyronin (Y) dye

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