Checkpoint for helicity conservation in fluorescence at the nanoscale: Energy and helicity transfer (hFRET) from a rotating donor dipole

Bene, László; Bagdány, Miklós; Damjanovich, László

doi:10.1016/j.bpc.2018.05.002

Cited by 19 publications

(13 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, in the presence of acceptors, the CPL energy will be transferred to the acceptor and emitting a new CPL ascribed to the acceptor. According to a recent theoretical calculation by Bene and co‐workers, the helicity in fluorescence from a rotating donor dipole could be conserved after energy and helicity transfer process (hFRET) . In our work, the helicity of fluorescent donor CG can be transferred to acceptor ThT and thus amplified the g lum of ThT.…”

Section: Figurementioning

confidence: 61%

Cooperative Chirality and Sequential Energy Transfer in a Supramolecular Light‐Harvesting Nanotube

et al. 2018

View full text Add to dashboard Cite

By constructing a supramolecular light‐harvesting chiral nanotube in the aqueous phase, we demonstrate a cooperative energy and chirality transfer. It was found that a cyanostilbene‐appended glutamate compound (CG) self‐assembled into helical nanotubes exhibiting both supramolecular chirality and circularly polarized luminescence (CPL). When two achiral acceptors, ThT and AO, with different energy bands were co‐assembled with the nanotube, the CG nanotube could transfer its chirality to both of the acceptors. The excitation energy could be transferred to ThT but only be sequentially transferred to AO. During this process, the CPL ascribed to the acceptor could be sequentially amplified. This work provides a new insight into the understanding the cooperative chirality and energy transfer in a chiral supramolecular system, which is similar to the natural light‐harvesting antennas.

show abstract

Section: Figurementioning

confidence: 61%

Cooperative Chirality and Sequential Energy Transfer in a Supramolecular Light‐Harvesting Nanotube

et al. 2018

View full text Add to dashboard Cite

show abstract

“…On the basis of a recent theoretical calculation by Bene et al, the helicity in fluorescence from a rotating donor dipole can be conserved after the energy-and helicity-transfer process (hFRET). [140] In the example of Figure 15B, the helicity of the fluorescent donor CG may be transferred to the acceptor ThT, thus amplifying the g lum of the ThT. In addition, compared with excitation by unpolarized light (g lum = 3.3 × 10 −3 ), the l-CG/ ThT system achieved amplified g lum (1.89 × 10 −2 ) when using circularly polarized light to excite it.…”

Section: Cpl Amplified By Förster Resonance Energy Transfermentioning

confidence: 97%

Circularly Polarized Luminescence in Nanoassemblies: Generation, Amplification, and Application

et al. 2019

View full text Add to dashboard Cite

Yutao Sang obtained his B.Sc. and M.Sc. degrees in chemistry from Qingdao University, China. In 2016, he enrolled on a Ph.D. course at the Institute of Chemistry, Chinese Academy of Sciences (ICCAS), under the supervision of Prof. Minghua Liu, where he is currently in his third year. His ongoing research includes supramolecular chirality, chiroptical materials, and symmetry breaking of achiral molecules in gels and related systems. Pengfei Duan received his Ph.D. degree from the Institute of Chemistry, Chinese Academy of Sciences (CAS) in 2011 with Prof. Minghua Liu on chiral selfassembly in colloid and interface chemistry. He was a postdoctoral research fellow with Prof. Nobuo Kimizuka at Kyushu University, working on photon upconversion in self-assembled systems. In 2015, he became a professor at the National Center for Nanoscience and Technology (NCNST). His current research interests focus on photochemistry and photophysics in chiral supramolecular systems.

show abstract

“…The quantization of that angular momentum is only valid along a single axis, which in the case of light identifies with the propagation vector. Therefore, the seemingly attractive prospect of helicity transfer in FRET 82,83 is not supported by fundamental principles.…”

Section: Discussionmentioning

confidence: 99%

Influence of chirality on fluorescence and resonance energy transfer

Forbes

Andrews

2019

The Journal of Chemical Physics

View full text Add to dashboard Cite

Electronically excited molecules frequently exhibit two distinctive decay mechanisms that rapidly generate optical emission: one is direct fluorescence; the other, energy transfer to a neighboring component. In the latter, the process leading to the ensuing 'indirect' fluorescence is known as FRET: fluorescence resonance energy transfer. For chiral molecules, both fluorescence and FRET exhibit discriminatory behavior with respect to optical and material handedness. While chiral effects such as circular dichroism are well known, as too is chiral discrimination for FRET in isolation, this article presents a study on a step-wise mechanism that involves both. Chirally sensitive processes follow excitation through the absorption of circularly polarized light, and are manifest in either direct or indirect fluorescence. Following recent studies setting down the symmetry principles, this analysis provides a rigorous, quantum outlook that complements and expands on these works. Circumventing expressions that contain complicated tensorial components, our results are amenable for determining representative numerical values for the relative importance of the various coupling processes. We discover that circular dichroism exerts a major influence on both fluorescence and FRET, and resolving the engagement of chirality in each component reveals the distinct roles of absorption and emission by, and between, donor and acceptor pairs. It emerges that chiral discrimination in the FRET stage is not, as might have been expected, the main arbiter in the step-wise mechanism. In the concluding discussion on various concepts, attention is focused on the validity of helicity transfer in FRET.

show abstract

Checkpoint for helicity conservation in fluorescence at the nanoscale: Energy and helicity transfer (hFRET) from a rotating donor dipole

Cited by 19 publications

References 56 publications

Cooperative Chirality and Sequential Energy Transfer in a Supramolecular Light‐Harvesting Nanotube

Cooperative Chirality and Sequential Energy Transfer in a Supramolecular Light‐Harvesting Nanotube

Circularly Polarized Luminescence in Nanoassemblies: Generation, Amplification, and Application

Influence of chirality on fluorescence and resonance energy transfer

Contact Info

Product

Resources

About