scholarly journals A Cocktail Approach Toward Tunable Organic Afterglow Systems

2021 ◽  
Author(s):  
Xiang Ma ◽  
Liangwei Ma ◽  
Qiangyang Xu ◽  
Bingbing Ding ◽  
Zizhao Huang ◽  
...  
Keyword(s):  
Solid Solution ◽  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Radiative Energy ◽  
Yellow Emission ◽  
Radiative Energy Transfer ◽  
Working Principle ◽  
Energy Acceptor ◽  
Cocktail Approach

In this work, a cocktail approach toward tunable organic long-lived luminescence materials in solid, solution, and gel states is proposed. The tunable long-lived luminescence (τ > 0.7 s) is realized by controlling the energy transfer via manipulating the photo-induced isomerization of the energy acceptor (5). The afterglow can be regulated between blue and yellow emission upon irradiation of UV or visible light. And the “apparent lifetime” for the long-lived fluorescence is the same as the lifetime of the energy donor. The function is relying on the simple radiative energy transfer (reabsorption) between a long-lived phosphorescence and a highly efficient fluorescent isomer (5b), rather than the complicated communication between the excited state of the molecules such as Förster resonance energy transfer or Dexter energy transfer. The simple working principle endows this strategy with huge universality, flexibility, and operability. This work offers an extremely simple, feasible, and universal way to construct tunable afterglow materials in solid, solution, and gel states.

Aptamer-modified sensitive nanobiosensors for the specific detection of antibiotics

2020 ◽  
Vol 8 (37) ◽  
pp. 8607-8613
Author(s):  
Ying Zhang ◽  
Bo Duan ◽  
Qing Bao ◽  
Tao Yang ◽  
Tiancheng Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Transfer ◽  
Fluorescence Resonance Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Specific Detection ◽  
Energy Donor ◽  
Energy Acceptor

A highly selective, fluorescence resonance energy transfer (FRET) based aptasensor for enrofloxacin (ENR) detection was developed using core–shell upconversion nanoparticles as an energy donor and graphene oxide as an energy acceptor.

scholarly journals Resonance energy transfer microscopy: observations of membrane-bound fluorescent probes in model membranes and in living cells.

1986 ◽  
Vol 103 (4) ◽  
pp. 1221-1234 ◽  
Author(s):  
P S Uster ◽  
R E Pagano
Keyword(s):  
Energy Transfer ◽  
Fluorescent Probes ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Living Cells ◽  
Model Membranes ◽  
Energy Donor ◽  
Membrane Bound ◽  
Energy Acceptor ◽  
In Cells

A conventional fluorescence microscope was modified to observe the sites of resonance energy transfer (RET) between fluorescent probes in model membranes and in living cells. These modifications, and the parameters necessary to observe RET between membrane-bound fluorochromes, are detailed for a system that uses N-4-nitrobenzo-2-oxa-1,3-diazole (NBD) or fluorescein as the energy donor and sulforhodamine as the energy acceptor. The necessary parameters for RET in this system were first optimized using liposomes. Both quenching of the energy donor and sensitized fluorescence of the energy acceptor could be directly observed in the microscope. RET microscopy was then used in cultured fibroblasts to identify those intracellular organelles labeled by the lipid probe, N-SRh-decylamine (N-SRh-C10). This was done by observing the sites of RET in cells doubly labeled with N-SRh-C10 and an NBD-labeled lipid previously shown to label the endoplasmic reticulum, mitochondria, and nuclear envelope. RET microscopy was also used in cells treated with fluorescein-labeled Lens culinaris agglutinin and a sulforhodamine derivative of phosphatidylcholine to examine the internalization of plasma membrane lipid and protein probes. After internalization, the fluorescent lectin resided in most, but not all of the intracellular compartments labeled by the fluorescent lipid, suggesting sorting of the membrane-bound lectin into a subset of internal compartments. We conclude that RET microscopy can co-localize different membrane-bound components at high resolution, and may be particularly useful in examining temporal and spatial changes in the distribution of fluorescent molecules in membranes of the living cell.

scholarly journals Synthesis of poly(p-phenylene) containing a rhodamine 6G derivative for the detection of Fe(iii) in organic and aqueous media

RSC Advances ◽  
2017 ◽  
Vol 7 (63) ◽  
pp. 39852-39858 ◽  
Author(s):  
Ho Namgung ◽  
Jongho Kim ◽  
Youngjin Gwon ◽  
Taek Seung Lee
Keyword(s):  
Energy Transfer ◽  
Rhodamine 6G ◽  
Aqueous Media ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Coupling Reaction ◽  
Suzuki Coupling ◽  
Suzuki Coupling Reaction ◽  
Energy Donor ◽  
Energy Acceptor

A poly(p-phenylene) (PPP) containing rhodamine 6G (R6G) was synthesized by the Suzuki-coupling reaction, in which PPP acted as a blue-emitting energy donor and R6G acted as a ligand for Fe(iii) as well as the energy acceptor for Förster resonance energy transfer.

scholarly journals Modulation of defect-mediated energy transfer from ZnO nanoparticles for the photocatalytic degradation of bilirubin

2013 ◽  
Vol 4 ◽  
pp. 714-725 ◽  
Author(s):  
Tanujjal Bora ◽  
Karthik Kunjali Lakshman ◽  
Soumik Sarkar ◽  
Abhinandan Makhal ◽  
Samim Sardar ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Single Photon ◽  
Photon Counting ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Radiative Energy ◽  
Defect States ◽  
Single Photon Counting

In recent years, nanotechnology has gained significant interest for applications in the medical field. In this regard, a utilization of the ZnO nanoparticles for the efficient degradation of bilirubin (BR) through photocatalysis was explored. BR is a water insoluble byproduct of the heme catabolism that can cause jaundice when its excretion is impaired. The photocatalytic degradation of BR activated by ZnO nanoparticles through a non-radiative energy transfer pathway can be influenced by the surface defect-states (mainly the oxygen vacancies) of the catalyst nanoparticles. These were modulated by applying a simple annealing in an oxygen-rich atmosphere. The mechanism of the energy transfer process between the ZnO nanoparticles and the BR molecules adsorbed at the surface was studied by using steady-state and picosecond-resolved fluorescence spectroscopy. A correlation of photocatalytic degradation and time-correlated single photon counting studies revealed that the defect-engineered ZnO nanoparticles that were obtained through post-annealing treatments led to an efficient decomposition of BR molecules that was enabled by Förster resonance energy transfer.

Resonance energy transfer-enhanced rhodamine–styryl Bodipy dyad triplet photosensitizers

2014 ◽  
Vol 2 (20) ◽  
pp. 3900-3913 ◽  
Author(s):  
Jie Ma ◽  
Xiaolin Yuan ◽  
Betül Küçüköz ◽  
Shengfu Li ◽  
Caishun Zhang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Visible Light ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Energy Donor ◽  
Energy Acceptor

Broadband visible light-absorbing triplet photosensitizers with rhodamine as the energy donor and styryl Bodipy as the energy acceptor/spin converter were prepared.

scholarly journals Improving Lanthanide-Based Resonance Energy Transfer Detection by Increasing Donor-Acceptor Distances

2006 ◽  
Vol 11 (4) ◽  
pp. 439-443 ◽  
Author(s):  
Kurt W. Vogel ◽  
Kevin L. Vedvik
Keyword(s):  
Energy Transfer ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Established Method ◽  
Time Resolved ◽  
Energy Donor ◽  
Emission Lifetime ◽  
Donor Acceptor ◽  
Organic Fluorophore ◽  
Energy Acceptor

Lanthanide-based resonance energy transfer (LRET) is an established method for measuring or detecting proximity between a luminescent lanthanide (energy donor) and an organic fluorophore (energy acceptor). Because resonance energy transfer is a distance-dependent phenomenon that increases in efficiency to the 6th power of the distance between the donor and the acceptor, assay systems are often designed to minimize donor-acceptor distances. However, the authors show that because of the R6 relationship between transfer efficiency and sensitized emission lifetime, energy transfer can be difficult to measure in a time-gated manner when the donor-acceptor distance is small relative to the Förster radius. In such systems, the advantages inherent in time-resolved, ratiometric measurements are lost but can be regained by designing the system such that the average donor-acceptor distance is increased.

scholarly journals Strahlungslose Energieübertragung von angeregten N-Heteroareniumkationen zu Rhodamin B. / Non-Radiative Energy Transfer from Excited N-Heteroarenium Cations to Rhodamin B.

1978 ◽  
Vol 33 (1) ◽  
pp. 78-82 ◽  
Author(s):  
J. Bendig ◽  
D. Kreysig
Keyword(s):  
Energy Transfer ◽  
Experimental Results ◽  
Radiative Energy ◽  
Spectroscopic Parameters ◽  
Low Viscosity ◽  
Radiative Energy Transfer ◽  
Rhodamin B ◽  
Step Mechanism ◽  
Energy Acceptor ◽  
Good Agreement

The systems acridizinium- and N-methylacridinium ion, respectively, as energy donors and rhodamin B (tetrafluoroborate) as energy acceptor show in solutions of low viscosity (solvent : methanol) energy transfer by resonance, in which a multi-step mechanism is participating. The experimental results of the detected singlet-singlet transfer are in good agreement with the predictable values of Förster's theory, if the spectroscopic parameters of the donor and the acceptor are corrected by assumption of their dependence upon concentration.

scholarly journals The Effect of Periodic Spatial Perturbations on the Emission Rates of Quantum Dots near Graphene Platforms

Materials ◽  
2020 ◽  
Vol 13 (16) ◽  
pp. 3504
Author(s):  
Xin Miao ◽  
David J. Gosztola ◽  
Xuedan Ma ◽  
David Czaplewski ◽  
Liliana Stan ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Graphene Layer ◽  
Emission Rate ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Radiative Energy ◽  
Surface Mode ◽  
Emission Rates ◽  
Spatially Correlated ◽  
Emission Lifetime

The quenching of fluorescence (FL) at the vicinity of conductive surfaces and, in particular, near a 2-D graphene layer has become an important biochemical sensing tool. The quenching is attributed to fast non-radiative energy transfer between a chromophore (here, a Quantum Dot, QD) and the lossy graphene layer. Increased emission rate is also observed when the QD is coupled to a resonator. Here, we combine the two effects in order to control the emission lifetime of the QD. In our case, the resonator was defined by an array of nano-holes in the oxide substrate underneath a graphene surface guide. At resonance, the surface mode of the emitted radiation is concentrated at the nano-holes. Thus, the radiation of QD at or near the holes is spatially correlated through the hole-array’s symmetry. We demonstrated an emission rate change by more than 50% as the sample was azimuthally rotated with respect to the polarization of the excitation laser. In addition to an electrical control, such control over the emission lifetime could be used to control Resonance Energy Transfer (RET) between two chromophores.

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