Effect of nanoclay laponite and pH on the energy transfer between fluorescent dyes

Dey, Dibyendu; Bhattacharjee, D.; Chakraborty, Santanu; Hussain, Syed Arshad

doi:10.1016/j.jphotochem.2012.12.003

Cited by 39 publications

(21 citation statements)

References 45 publications

(69 reference statements)

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“…These are listed in table 2. The detail of the calculation procedure is mentioned elsewhere [38]. It has been observed that the energy transfer efficiency increases from 36.54% to 57.65 % in presence of Laponite.…”

Section: Energy Transfer In Solutionmentioning

confidence: 99%

Formation of fluorescent H-aggregates of a cyanine dye in ultrathin film and its effect on energy transfer

Chakraborty

Debnath

Dey

et al. 2014

Journal of Photochemistry and Photobiology A: Chemistry

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In this communication we report the formation of fluorescent H -aggregates of a cyanine dye 3,3 -Dioctadecyloxacarbocyanine perchlorate (Oxa18) in ultrathin film and its effect on energy transfer between Oxa18 and Sulphorhodamine B monosodium salt (sRhb). Surface pressurearea per molecule isotherm revealed that Oxa18 forms stable Langmuir monolayer at air-water interface. Spectroscopic investigation revealed that Oxa18 forms H -aggregate in LangmuirBlodgett (LB) film which is enhanced in presence of nano clay laponite. Ideally H -aggregate do not fluoresce. However, due to imperfect stacking of Oxa18 molecules in the aggregates, fluorescence occurred from Oxa18 H -aggregates. This H -aggregated band has substantial effect on the enhancement of energy transfer from Oxa18 to sRhb both in solution and in ultrathin film.3

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Section: Energy Transfer In Solutionmentioning

confidence: 99%

Formation of fluorescent H-aggregates of a cyanine dye in ultrathin film and its effect on energy transfer

Chakraborty

Debnath

Dey

et al. 2014

Journal of Photochemistry and Photobiology A: Chemistry

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“…Both the dyes are highly fluorescent. There are few reports on the investigation of FRET between these two dyes [21,22]. In our laboratory we have also studied FRET phenomenon using these two dyes [22].…”

Section: Fret Between Acf and Rhb In Presence And Absence Of Dnamentioning

confidence: 98%

Sensing of DNA conformation based on change in FRET efficiency between laser dyes

Dey

Saha

Roy

et al. 2014

Sensors and Actuators B: Chemical

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This communication reports the effect of DNA conformation on fluorescence resonance energy transfer (FRET) efficiency between two laser dyes in layer by layer (LbL) self assembled film. The dyes Acraflavine and Rhodamine B were attached onto the negative phosphate backbones of DNA in LbL film through electrostatic attraction. Then FRET between these dyes was investigated. Increase in pH or temperature causes the denaturation of DNA followed by coil formation of single stranded DNA. As a result the FRET efficiency also changed along with it. These observations demonstrated that by observing the change in FRET efficiency between two laser dyes in presence of DNA it is possible to detect the altered DNA conformation in the changed environment.

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“…The orientation of the interacting chromophores is another important parameter for FRET to occur. Hybrids based on clay minerals in which dye molecules are embedded have properties which meet a resonance condition, are ideal for FRET to occur in high yields (Schoonheydt, 2002;Czimerová et al, 2008;Bujdák et al, 2010;Hussain et al, 2010;Bujdák et al, 2011;Dey et al, 2013;Bujdák, 2014). The concentration of the dyes, which are adsorbed on the surface of colloidal particles or are intercalated in solid matrix, is mostly sufficiently high.…”

Section: Resonance Energy Transfer In Hybrid Materialsmentioning

confidence: 99%

Hybrid systems based on organic dyes and clay minerals: Fundamentals and potential applications

Bujdák

2015

Clay miner.

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This review summarizes several aspects of the interactions between organic dyes and clay minerals, and presents some interesting properties of hybrid materials based on these components. It explains the basic phenomena and photophysical properties of dye/clay mineral hybrid systems (DCHS) while examining the role of clay minerals in them. A brief history of using dyes as tools for clay research and on traditional materials based on DCHS is presented. Metachromasy, the phenomenon of colour change related to the formation of dye molecular aggregates is described in detail and analysed from various perspectives. The properties of DCHS, including photoactivity, luminescence, photocatalytic properties, optical anisotropy and non-linear optical properties are analysed in detail. Clay minerals often play a significant role in the occurrence of specific photophysical phenomena such as resonance energy transfer and luminescence quenching and may influence various reactions, such as conformational changes in dye molecules, photochromism, photoisomerization, photosensitization and other photochemical processes. Routes to synthesize various types of hybrid materials are also described here. The relevance of DCHS for clay research, chemistry and materials science is summarized briefly.

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Effect of nanoclay laponite and pH on the energy transfer between fluorescent dyes

Cited by 39 publications

References 45 publications

Formation of fluorescent H-aggregates of a cyanine dye in ultrathin film and its effect on energy transfer

Formation of fluorescent H-aggregates of a cyanine dye in ultrathin film and its effect on energy transfer

Sensing of DNA conformation based on change in FRET efficiency between laser dyes

Hybrid systems based on organic dyes and clay minerals: Fundamentals and potential applications

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