Modulation of FRET efficiency by donor-acceptor ratio in co-condensed fluorophore-silica nanoconjugates

Dhir, Anjali; Gogoi, Hemen; Datta, Anindya

doi:10.1016/j.jics.2021.100067

Cited by 6 publications

(5 citation statements)

References 62 publications

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“…Though a higher efficiency of FRET has been achieved at higher number density as compared to low number density, but due to DÀ D quenching, a low number is inferred to be favorable in this kind of systems. [93,94] In another work, ultrafast charge transfer has been reported from light absorber to catalyst across SiO 2 embedded molecular wire with the help of transient absorption spectroscopy. Here, free-base porphyrin acts as molecular light absorber which is coupled with Co 3 O 4 via poligo(phenylenevinylene) acting as a molecular wire for water oxidation.…”

Section: Photosynthetic Mimicmentioning

confidence: 99%

“…700–1100 dye molecules/particle). Though a higher efficiency of FRET has been achieved at higher number density as compared to low number density, but due to D−D quenching, a low number is inferred to be favorable in this kind of systems [93,94] . In another work, ultrafast charge transfer has been reported from light absorber to catalyst across SiO 2 embedded molecular wire with the help of transient absorption spectroscopy.…”

Section: Host‐guest Chemistrymentioning

confidence: 99%

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Photoluminescent Silica Nanostructures and Nanohybrids

2022

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The complicated photophysics of wide variety of defects existing in silica (SiO 2 ) layer of nanometer thickness determines widespread photoluminescence bands of Si/SiO 2 based system as well as SiO 2 nanoparticles (NPs) for their applications in photovoltaic and optoelectronic devices. This review attempts to summarize different photophysical processes in pure SiO 2 NPs. Moreover, these NPs also act as scaffolds for various guest molecules to perform their specific functions. Guest fluorophore molecules when trapped inside pores of SiO 2 NPs exhibit a different photodynamics than free state, which opens up several important applications of hybrid SiO 2 NPs in artificial photosynthesis, sensing, biology and optical fiber.

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Section: Photosynthetic Mimicmentioning

confidence: 99%

Section: Host‐guest Chemistrymentioning

confidence: 99%

Photoluminescent Silica Nanostructures and Nanohybrids

2022

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“…It is vital to reduce the self-quenching of the donor to increase the energy transferred from the donor to the acceptor. It was reported that a lower number of dye molecules was more beneficial for better light-harvesting in surface-functionalized nanoparticles [ 17 ]. In contrast, J-aggregate is one type of self-quenching, which is formed by a highly ordered assembly of organic dyes [ 18 ].…”

Section: Different Fret Pairs and Their Propertiesmentioning

confidence: 99%

FRET Ratiometric Nanoprobes for Nanoparticle Monitoring

et al. 2021

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Fluorescence labelling is often used for tracking nanoparticles, providing a convenient assay for monitoring nanoparticle drug delivery. However, it is difficult to be quantitative, as many factors affect the fluorescence intensity. Förster resonance energy transfer (FRET), taking advantage of the energy transfer from a donor fluorophore to an acceptor fluorophore, provides a distance ruler to probe NP drug delivery. This article provides a review of different FRET approaches for the ratiometric monitoring of the self-assembly and formation of nanoparticles, their in vivo fate, integrity and drug release. We anticipate that the fundamental understanding gained from these ratiometric studies will offer new insights into the design of new nanoparticles with improved and better-controlled properties.

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“…Energy transfer between D & A dye molecules is an important mechanism used for various purposes, for example, extending the lasing wavelength [22], enhancement in tunability [23], and also increasing the power of dye lasers [24][25][26][27]. Many reports on energy transfer in organic dyes are available with a number of donoracceptor (D-A) pairs using Rhodamine-6G [28][29][30][31][32][33][34] or Rhodamine-B as an acceptor [35][36][37][38][39]. Also, more than two dyes are used in a mixture to get extensive antenna ability by using the energy transfer mechanism [9,34,[40][41][42][43][44][45][46].…”

Section: Introductionmentioning

confidence: 99%

A comparative study of conventional FRET and light harvesting properties of Rh-110/Rh-6G and Rh-19/Rh-B organic dye pairs impregnated in sol-gel glasses

Mahato

Kumar

2023

Methods Appl. Fluoresc.

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Two different pairs of laser dyes, Rhodamine-110 (Rh-110)/Rhodamine-6G (Rh-6G) and Rhodamine-19 (Rh-19)/Rhodamine-B (Rh-B) (the first dye in each pair as a donor and the second as an acceptor) were impregnated in silica samples prepared by the sol-gel method and spectroscopically studied using absorption and steady-state fluorescence techniques. The critical transfer distance (R0), actual distance (r) between the donor and acceptor, overlap integral [J(ῡ)], FRET (fluorescence resonance energy transfer) efficiency (E), and antenna effect efficiency (AE) were investigated in detail based on the variation in acceptor concentration. The FRET efficiency, antenna effect efficiency, and actual donor-acceptor distance for Rh-110/Rh-6G and Rh-19/Rh-B dye pairs corresponding to acceptor concentration ranges (3.83 to 7.65)×10-5 M/L and (3.71 to 8.34)×10-5 M/L, respectively, were found to be in the ranges of 57.38% to 74.89%, 36.97% to 24.13%, 5.44 nm to 4.77 nm, and 77.01%. Furthermore, maximum FRET efficiencies of 85.68% and 87.63% and antenna effect efficiencies of 36.97% and 40.95% for Rh-110/Rh-6G and Rh-19/Rh-B, respectively, were also reported. Our results demonstrate the superior FRET efficiency of Rh-19/Rh-B over Rh-110/Rh-6G dye pair in sol-gel glasses, while the antenna effect efficiency of Rh-110/Rh-6G is higher than that of Rh-19/Rh-B for the same donor to acceptor (D/A) ratio. Finally, Rh-110/Rh-6G is a better energy harvester than the Rh-19/Rh-B dye pair at the common D/A ratio. These results are explained in terms of molecular structure similarity, polarity, and rigidity of donor and acceptor.

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Modulation of FRET efficiency by donor-acceptor ratio in co-condensed fluorophore-silica nanoconjugates

Cited by 6 publications

References 62 publications

Photoluminescent Silica Nanostructures and Nanohybrids

Photoluminescent Silica Nanostructures and Nanohybrids

FRET Ratiometric Nanoprobes for Nanoparticle Monitoring

A comparative study of conventional FRET and light harvesting properties of Rh-110/Rh-6G and Rh-19/Rh-B organic dye pairs impregnated in sol-gel glasses

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