Clay induced changes in the aggregation pattern of Safranine-O in hybrid Langmuir-Blogdgett (LB) films

Saha, Mitu; Shil, Ashis; Hussain, Syed Arshad; Bhattacharjee, D.

doi:10.1016/j.jphotochem.2017.08.053

Cited by 10 publications

(4 citation statements)

References 43 publications

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“…It is known that optical properties may inform on the location and accommodation of the guest organic molecule into or onto the clay mineral as recently reported for laponite and fluorescent dye Safranine simply aggregated or built as Langmuir-Blodgett film (Saha et al, 2017).…”

Section: Introductionmentioning

confidence: 92%

Luminescent N-heterocycles based molecular backbone interleaved within LDH host structure and dispersed into polymer

Legentil

Chadeyron

Thérias

et al. 2020

Applied Clay Science

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A pyrazino-1,3a,6a-triazapentalene dye-based molecule was intercalated by direct coprecipitation method into the galleries of negatively charged layered double hydroxide (LDH) to form a new luminescent LDH filler. The materials of cation composition Zn/Al = 2 lead to well-defined organic inorganic assemblies. The structure of the hybrid materials was characterized by X-ray diffraction (XRD), Fourier-transform infrared spectra (FTIR) and UVvisible spectra. Optical properties of the materials, at both solid state and slurry state, were also recorded and absolute photoluminescent quantum yields (PLQY) were determined showing that the nanohybrid LDH slurry exhibited higher luminescence properties under UV excitation than the corresponding LDH powder. LDH fillers were used to prepare composite films by dispersion in both hydrophobic or hydrophilic polymer matrix such as poly(dimethyl siloxane) (PDMS) and poly(ethylene oxide) (PEO), respectively. Composite films were 3 characterized by Small Angle X-ray Scattering (SAXS) and PLQY were recorded in order to compare the behaviour of the nanohybrid LDH filler in both polymer matrices. It was found that the aggregation of particles is still observed by SAXS.

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Section: Introductionmentioning

confidence: 92%

Luminescent N-heterocycles based molecular backbone interleaved within LDH host structure and dispersed into polymer

Legentil

Chadeyron

Thérias

et al. 2020

Applied Clay Science

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“…BAM is an authentic tool generally used to get information regarding the morphological changes of the floating monolayer [66]. Accordingly, visual evidence of complex formation or interaction in the multi component LB film can be obtained through BAM studies [75]. ions, they remained within the subphase and almost no Hg 2+ molecules appear onto the air water interface [23,31].…”

Section: Monolayer Characteristics At Air Water Interfacementioning

confidence: 99%

Fluorescence- and FRET-based mercury (II) sensor

Saha

Suklabaidya

Nath

et al. 2019

International Journal of Environmental Analytical Chemistry

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A mercury (II) sensor has been proposed based on Fluorescence Resonance Energy Transfer (FRET) between N,N'-dioctadecyl thiacyanine perchlorate (NK) and Octadecyl rhodamine B chloride (RhB). Out of these two molecules NK is sensitive to Hg 2+ ions due to presence of sulfur atom in it. Accordingly, presence of Hg 2+ ions affects the NK fluorescence as well as FRET from NK to RhB. Our results showed that NK fluorescence intensity and FRET efficiency linearly decreases with increase in Hg 2+ ion concentration. With proper optimization present system under investigations can be used to sense Hg 2+ ions in aqueous solution with detection limit of 9.13 ppb. Advantage of this present system is that it is very simple compared to the other FRET based system and also it works under aqueous environment. This method has also been tested using real lake water and satisfactory results were obtained.

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“…It is known that H-aggregates are nonfluorescent and decrease the fluorescent intensity of dye molecules. 38 Hereby, it can be taken into consideration that the RH particles have a fluorescence quenching effect and a comprehensive understanding of this effect is important with regard to fluorescence applications for dye compounds. In order to determine fluorescence behavior of Rh-B in the RH suspensions, the fluorescence spectra were recorded with the excitation wavelength of 500 nm (Fig.…”

Section: Photophysical Properties Of Rh-b In Rice Husk Suspensionsmentioning

confidence: 99%

Investigation of a hybrid material and photophysical properties of rhodamine B in aqueous suspensions of cellulosic particles

Kaya¹

2019

Rev.Roum.Chim.

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In this work, it was focused on the photophysical properties of Rhodamine B (Rh-B) dye compound in the rice husk (sawdust) suspensions (RHS), as well as the characterization of the hybrid material from Rh-B and rice husk (RH). It was revealed that the type of molecular assembly of Rh-B in RHS was H-aggregation. As regards the results of Fourier transformed infrared (FT-IR) spectroscopic characterization, it can be explained that Rh-B dye molecule adsorbed (or penetrated) on the surface of RH particles via H-bonding alongside electrostatic interactions. It was also demonstrated that the particle size of hybrid materials in a colloidal dispersion was about 250 nm, which is a feasible value for ink applications.

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Clay induced changes in the aggregation pattern of Safranine-O in hybrid Langmuir-Blogdgett (LB) films

Cited by 10 publications

References 43 publications

Luminescent N-heterocycles based molecular backbone interleaved within LDH host structure and dispersed into polymer

Luminescent N-heterocycles based molecular backbone interleaved within LDH host structure and dispersed into polymer

Fluorescence- and FRET-based mercury (II) sensor

Investigation of a hybrid material and photophysical properties of rhodamine B in aqueous suspensions of cellulosic particles

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