Near infra-red dyes based on pyrene aza-BODIPYs

2018 ◽  
Vol 42 (8) ◽  
pp. 5875-5888 ◽  
Author(s):  
Naresh Balsukuri ◽  
Nayan Jyoti Boruah ◽  
Praseetha E. Kesavan ◽  
Iti Gupta
Keyword(s):  
Energy Transfer ◽  
Emission Spectra ◽  
Efficient Energy Transfer ◽  
Absorption And Emission ◽  
Efficient Energy ◽  
Absorption And Emission Spectra ◽  
Infra Red ◽  
Donor Acceptor

Donor–acceptor type pyrene substituted aza-BODIPYs are reported, and efficient energy transfer from pyrene moieties to the aza-BODIPY core caused significant red shifts in their absorption and emission spectra.

Photo and Electroluminescent Properties of a Porphyrin-Poly(p-Phenylene Vinylene) Derivative

1999 ◽  
Vol 598 ◽  
Author(s):  
J. Morgado ◽  
R. Iqbal ◽  
G. Yahioglu ◽  
L. R. Milgrom ◽  
S. C. Moratti ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Phenylene Vinylene ◽  
Efficient Energy Transfer ◽  
Light Emitting ◽  
Efficient Energy ◽  
Small Absorption ◽  
Pl Emission

ABSTRACTThe solid state luminescent properties of new statistical copolymers of 2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene and a porphyrin-substituted phenylene vinylene are reported. The photoluminescence, PL, emission shows an efficient energy transfer to the porphyrin, in spite of the small absorption coefficient of the porphyrin in the wavelength range of the poly [2-methoxy-5-(2'- ethylhexyloxy)-1,4-phenylene vinylene], MEH-PPV, emission. At a porphyrin content of 0.25%, by weight, the emission is already dominated by the porphyrin. The PL efficiency of these copolymers is significantly reduced from the value of 13% for MEH-PPV down to 3% for the copolymer with 10.84% of porphyrin. Efficient energy transfer is also observed in the emission spectra of light-emitting diodes.

Donor–acceptor fluorophores as efficient energy transfer photocatalysts for [2 + 2] photodimerization

2020 ◽  
Vol 18 (19) ◽  
pp. 3707-3716
Author(s):  
Qing-An Wu ◽  
Feng Chen ◽  
Chen-Chao Ren ◽  
Xue-Fen Liu ◽  
Hao Chen ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Precious Metal ◽  
Isomerization Reaction ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Donor Acceptor

Donor–acceptor fluorophores can act as efficient energy transfer photocatalysts to activate enone substrates, realizing photodimerization and isomerization reaction of enone substrates without precious metal photocatalysts.

scholarly journals Tunable emission from green to red in the GdSr2AlO5:Tb3+,Eu3+ phosphor via efficient energy transfer

RSC Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 3530-3535 ◽  
Author(s):  
Yu Zhang ◽  
Xuejie Zhang ◽  
Haoran Zhang ◽  
Lingling Zheng ◽  
Yuan Zeng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Emission Spectra ◽  
Green Emission ◽  
Efficient Energy Transfer ◽  
Red Emission ◽  
Efficient Energy ◽  
Tunable Emission ◽  
Variation Tendency

The emission spectra of GdSr2AlO5:2%Tb3+,x%Eu3+ (x = 0, 0.5, 1, 2, 3, and 5) under 275 nm excitation. (b) Variation tendency of the green emission of Tb3+ and the red emission of Eu3+.

Theoretical Study of the Substituent and Solvent Effects on the Molecular Structures, Absorption and Emission Spectra of Open-Form Spiropyrans

2004 ◽  
Vol 69 (1) ◽  
pp. 47-62 ◽  
Author(s):  
Yinghong Sheng ◽  
Jerzy Leszczynski
Keyword(s):  
Solvent Effects ◽  
Emission Spectra ◽  
Molecular Structures ◽  
Open Form ◽  
Geometrical Parameters ◽  
Excitation Energies ◽  
Absorption And Emission ◽  
Absorption And Emission Spectra ◽  
Donor Acceptor ◽  
The Impact

The effects of substituents and solvents on the molecular structures, excitation energies and emission energies of a series of donor-acceptor substituted spiropyrans were investigated using the density functional methods. Different donor-acceptor pairs lead to alternations of the molecular structures. A relationship between the strengths of donor-acceptor pairs and the structural parameter BLA (bond length alternation) was examined and discussed. The impact on geometrical parameters induced by the solvents is more significant than that caused by the substituents, as indicated by the larger BLA changes. The substituent and solvent effects on the UV absorption and emission spectra of open-form spiropyrans were studied by the TD-DFT method. The absorption maxima of open-form spiropyrans are expected to red shift, and the emission are expected to blue shift as the strengths of donor-acceptor pairs and the polarities of solvents increase. A simple model was adopted to mimic the substituent and solvent effects, in the framework of AM1, employing Sparkles to create an external electric field on the open-form spiropyran, in order to induce a systematical polarization of the molecular equilibrium geometry and the electronic configuration.

Extending light-harvesting of poly(3-hexylthiophene) through efficient energy transfer from infra-red absorbing nanocrystals: Single nanoparticle study

2014 ◽  
Vol 105 (16) ◽  
pp. 163114 ◽  
Author(s):  
Justyna Grzelak ◽  
Kamil Ciszak ◽  
Marcin Nyk ◽  
Sebastian Mackowski ◽  
Dawid Piatkowski
Keyword(s):  
Energy Transfer ◽  
Light Harvesting ◽  
Efficient Energy Transfer ◽  
Efficient Energy ◽  
Single Nanoparticle ◽  
Infra Red

Efficient artificial light-harvesting systems based on aggregation-induced emission constructed in supramolecular gels

Soft Matter ◽  
2021 ◽  
Author(s):  
Xinxian Ma ◽  
bo qiao ◽  
Jinlong Yue ◽  
JingJing Yu ◽  
yutao geng ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rhodamine B ◽  
Fluorescent Dyes ◽  
Light Harvesting ◽  
Artificial Light ◽  
Efficient Energy Transfer ◽  
Aggregation Induced Emission ◽  
Efficient Energy ◽  
Harvesting Systems ◽  
Acyl Hydrazone

Based on a new designed acyl hydrazone gelator (G2), we developed an efficient energy transfer supramolecular organogel in glycol with two different hydrophobic fluorescent dyes rhodamine B (RhB) and acridine...

Sign in / Sign up

Export Citation Format

Share Document