scholarly journals “CinNapht” Dyes as New Cinnoline/Naphthalimide Fused Hybrids Fluorophores: Synthesis, Photo-Physical Study and Use for Bio-Imaging

2021 ◽  
Author(s):  
Minh-Duc Hoang ◽  
Jean-Baptiste Bodin ◽  
Farah Savina ◽  
Vincent Steinmetz ◽  
Jérôme Bignon ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Red Emission ◽  
Solvatochromic Effect ◽  
Physical Study ◽  
Donor Acceptor ◽  
Bio Imaging ◽  
Naphthalimide Dye

Six-membered diaza ring of Cinnoline have been fused on Naphthalimide dye to give donor–acceptor system called CinNapht. These red shifted fluorophore, that can be synthetised in gram scale, exhibits a large Stoke Shift and quantum yield up to 0.33. It is also caracterized by strong solvatochromic effect for green to red emission as well and can be used for bio-imaging

scholarly journals “CinNapht” Dyes as New Cinnoline/Naphthalimide Fused Hybrids Fluorophores: Synthesis, Photo-Physical Study and Use for Bio-Imaging

2021 ◽  
Author(s):  
Minh-Duc Hoang ◽  
Jean-Baptiste Bodin ◽  
Farah Savina ◽  
Vincent Steinmetz ◽  
Jérôme Bignon ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Red Emission ◽  
Solvatochromic Effect ◽  
Physical Study ◽  
Donor Acceptor ◽  
Bio Imaging ◽  
Naphthalimide Dye

Six-membered diaza ring of Cinnoline have been fused on Naphthalimide dye to give donor–acceptor system called CinNapht. These red shifted fluorophore, that can be synthetised in gram scale, exhibits a large Stoke Shift and quantum yield up to 0.33. It is also caracterized by strong solvatochromic effect for green to red emission as well and can be used for bio-imaging

scholarly journals “CinNapht” dyes: a new cinnoline/naphthalimide fused hybrid fluorophore. Synthesis, photo-physical study and use for bio-imaging

RSC Advances ◽  
2021 ◽  
Vol 11 (48) ◽  
pp. 30088-30092
Author(s):  
Minh-Duc Hoang ◽  
Jean-Baptiste Bodin ◽  
Farah Savina ◽  
Vincent Steinmetz ◽  
Jérôme Bignon ◽  
...  
Keyword(s):  
Physical Study ◽  
Donor Acceptor ◽  
Bio Imaging ◽  
Naphthalimide Dye

Six-membered-diaza ring of cinnoline has been fused on naphthalimide dye to give a donor–acceptor system called CinNapht.

scholarly journals Shielding Unit Engineering of NIR-II Molecular Fluorophores for Improved Fluorescence Performance and Renal Excretion Ability

2021 ◽  
Vol 9 ◽  
Author(s):  
Chunchen Liu ◽  
Huilong Ma ◽  
Zhubin Hu ◽  
Rui Tian ◽  
Rui Ma ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Near Infrared ◽  
Renal Excretion ◽  
Side Chain ◽  
Side Chains ◽  
High Brightness ◽  
Calculation Results ◽  
Donor Acceptor ◽  
Bio Imaging

Molecular fluorophores emitting in the second near-infrared (NIR-II) window with good renal excretion ability are favorable for in vivo bio-imaging and clinical applications. So far, renally excretable fluorophores are still less studied. Understanding the influences of molecular structure on optical properties and renal excretion abilities are vital for fluorophore optimization. Herein, a series of shielding unit-donor-acceptor-donor-shielding unit (S-D-A-D-S) NIR-II molecular fluorophores are designed and synthesized with dialkoxy chains substituted benzene as the S unit. The anchoring positions of dialkoxy chains on benzene are tuned as meso-2,6, para-2,5, or ortho-3,4 to afford three fluorophores: BGM6P, BGP6P and BGO6P, respectively. Experimental and calculation results reveal that alkoxy side chains anchored closer to the conjugated backbone can provide better protection from water molecules and PEG chains, affording higher fluorescence quantum yield (QY) in aqueous solutions. Further, these side chains can enable good encapsulation of backbone, resulting in decreased binding with albumin and improved renal excretion. Thus, fluorophore BGM6P with meso-2,6-dialkoxy chains exhibits the highest quantum yield and fastest renal excretion. This work emphasizes the important roles of side chain patterns on optimizing NIR-II fluorophores with high brightness and renal excretion ability.

Achieving high quantum yield charge separation in porphyrin-containing donor-acceptor molecules at 10 K

1988 ◽  
Vol 110 (21) ◽  
pp. 7219-7221 ◽  
Author(s):  
Michael R. Wasielewski ◽  
Douglas G. Johnson ◽  
Walter A. Svec ◽  
Kristin M. Kersey ◽  
David W. Minsek
Keyword(s):  
Quantum Yield ◽  
Charge Separation ◽  
High Quantum Yield ◽  
High Quantum ◽  
Donor Acceptor ◽  
Acceptor Molecules

scholarly journals Quenched carbonaceous composite (QCC) as a carrier of the extended red emission and blue luminescence in the red rectangle

2008 ◽  
Vol 4 (S251) ◽  
pp. 417-424
Author(s):  
S. Wada ◽  
Y. Mizutani ◽  
T. Narisawa ◽  
A. T. Tokunaga
Keyword(s):  
Quantum Yield ◽  
Laboratory Data ◽  
Blue Luminescence ◽  
Peak Wavelength ◽  
Gaseous State ◽  
Red Emission ◽  
Polycyclic Aromatic ◽  
Solid Film ◽  
Large Width ◽  
Extended Red Emission

AbstractFilmy-QCC is an organic material synthesized in the laboratory, and it exhibits red photoluminescence (PL). The peak wavelength of the PL ranges from 650 to 690 nm, depending on the mass distribution of polycyclic aromatic hydrocarbon (PAH) molecules, and the emission profile is a good match for that of the extended red emission in the Red Rectangle nebula. The quantum yield of the PL ranges from 0.009 to 0.04. When filmy-QCC is dissolved in cyclohexane, it exhibits blue PL in the wavelength range of 400–500 nm with a quantum yield of 0.12–0.16. The large width of the red PL and the large wavelength difference between the PL of the filmy-QCC as a solid film and in a solution indicate that there is a strong interaction between the components of filmy-QCC. The major components of filmy-QCC are PAHs up to 500 atomic mass units. Our laboratory data suggest that the blue luminescence observed in the Red Rectangle nebula is probably caused by small PAHs in a gaseous state, and the extended red emission is caused by larger PAHs in dust grains.

A study on photophysical and photodynamic properties of donor–acceptor BODIPY complexes: Correlation between singlet oxygen quantum yield and singlet-triplet energy gap

2021 ◽  
Vol 187 ◽  
pp. 109051
Author(s):  
Jae Moon Lee ◽  
Seongsoo Kang ◽  
Tae Gyu Hwang ◽  
Hong Mo Kim ◽  
Woo Sung Lee ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Singlet Oxygen ◽  
Energy Gap ◽  
Triplet Energy ◽  
Donor Acceptor

Bridge-driven aggregation control in dibenzofulvene–naphthalimide based donor–bridge–acceptor systems:  enabling fluorescence enhancement, blue to red emission and solvatochromism

2017 ◽  
Vol 1 (12) ◽  
pp. 2590-2598 ◽  
Author(s):  
Peddaboodi Gopikrishna ◽  
Laxmi Raman Adil ◽  
Parameswar Krishnan Iyer
Keyword(s):  
Fluorescence Enhancement ◽  
Aggregation Behavior ◽  
Red Emission ◽  
Donor Acceptor ◽  
Aggregation Control

The photophysical and aggregation behavior of four novel donor–acceptor based luminogens was precisely controlled by the π-electron bridge in the donor–bridge–acceptor core structures.

Novel Cyclometalated Iridium(III) Xanthate Complexes and Their Phosphorescence Behavior in the Presence of Metal Ions

2012 ◽  
Vol 67 (9) ◽  
pp. 865-871
Author(s):  
Bihai Tong ◽  
Yaqing Xu ◽  
Jiayan Qiang ◽  
Man Zhang ◽  
Qunbo Mei ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Metal Ions ◽  
Single Crystal ◽  
Photophysical Properties ◽  
Metal Cations ◽  
X Ray Diffraction ◽  
Red Emission ◽  
X Ray ◽  
Emission Lifetime ◽  
Phosphorescence Quantum Yield

Two cyclometalated iridium(III) complexes, Ir(dpppz)(ppz)(ipx) and Ir(ppz)2(ipx) (dpppzH=1- (2,6-dimethylphenoxy)-4-phenylphthalazine, ppzH=4-phenylphthalazinone, ipx=isopropyl xanthate), have been synthesized and characterized by single-crystal X-ray diffraction. The photophysical properties of the two complexes were also investigated. Ir(dpppz)(ppz)(ipx) shows orange-red emission at around 606 nm with a phosphorescence quantum yield of ca. 0.0032 and an emission lifetime of 188 ns, while Ir(ppz)2(ipx) shows orange-red emission at around 599 nm with a phosphorescence quantum yield of ca. 0.00318 and an emission lifetime of 259 ns. The phosphorescence behavior of Ir(ppz)2(ipx) towards different metal cations has also be studied. Its strong phosphorescence is quenched by Hg2+, Cu2+ and Ag+ cations. The interaction ratio with Hg2+ is 1:1

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