Synthesis of π-extended B ← N coordinated phenanthroimidazole dimers and their linear and nonlinear optical properties

2020 ◽  
Vol 49 (23) ◽  
pp. 7737-7746
Author(s):  
Mukundam Vanga ◽  
Shreenibasa Sa ◽  
Anupa Kumari ◽  
Anna Chandrasekar Murali ◽  
Prakash Nayak ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Photon Absorption ◽  
Quantum Yields ◽  
Conjugation Length ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Fluorescence Quantum Yields ◽  
Two Photon ◽  
Linear And Nonlinear

B ← N coordinated phenanthroimidazole dimers exhibit excellent fluorescence quantum yields in solution and conjugation length dependant two-photon-absorption properties.

Spectroscopy and Nonlinear Absorption of α, ω-dithienyi Polyenes

1997 ◽  
Vol 479 ◽  
Author(s):  
L. V. Natarajan ◽  
Laura A. Sowards ◽  
C. W. Spangler ◽  
N. Tang ◽  
P. A. Fleitz ◽  
...  
Keyword(s):  
Nonlinear Absorption ◽  
Nonlinear Optical ◽  
Photon Absorption ◽  
Quantum Yields ◽  
Two Photon Absorption ◽  
Fluorescence Quantum Yields ◽  
Two Photon ◽  
Steady State Fluorescence ◽  
Nonlinear Optical Absorption ◽  
Substituted Polyenes

AbstractThe photophysics and nonlinear absorption behaviour of a series of α, ω-dithienyl polyenes were studied in chloroform and n-octane solutions. Steady state fluorescence, fluorescence lifetime and quantum yield measurements were made. The fluorescence quantum yields were significantly lower than those of the corresponding ax,o-diphenyl polyenes. Among the dithienyl polyenes, 3,3′-substituted polyenes exhibited stronger fluorescence than those of the 2,2′-substituted. Nonlinear optical absorption experiments showed evidence of two photon absorption.

2,5-Bis(azulenyl)pyrrolo[3,2-b]pyrroles – the key influence of the linkage position on the linear and nonlinear optical properties

2017 ◽  
Vol 5 (10) ◽  
pp. 2620-2628 ◽  
Author(s):  
Yevgen M. Poronik ◽  
Leszek M. Mazur ◽  
Marek Samoć ◽  
Denis Jacquemin ◽  
Daniel T. Gryko
Keyword(s):  
Optical Properties ◽  
Absorption Spectrum ◽  
Nonlinear Optical ◽  
Photon Absorption ◽  
No Emission ◽  
Visible Light Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Linkage Position ◽  
Linear And Nonlinear

Linking pyrrole[3,2-b]pyrrole core with azulene moieties leads to dyes possessing strong visible light absorption, no emission, and a two-photon absorption spectrum.

Fluorenylethynylpyrene derivatives with strong two-photon absorption: influence of substituents on optical properties

2015 ◽  
Vol 3 (15) ◽  
pp. 3730-3744 ◽  
Author(s):  
C. Lavanya Devi ◽  
K. Yesudas ◽  
Nikolay S. Makarov ◽  
V. Jayathirtha Rao ◽  
K. Bhanuprakash ◽  
...  
Keyword(s):  
Optical Properties ◽  
Cross Sections ◽  
Photon Absorption ◽  
Quantum Yields ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Fluorescence Quantum Yields ◽  
Two Photon ◽  
Influence Of Substituents

A series of fluorenylethynylpyrene derivatives with large two-photon absorption cross-sections (≈250–2500 GM) and good fluorescence quantum yields (Φfl = 0.55–0.98) and with high two-photon brightness were synthesized.

Third-order nonlinear optical properties and two-photon absorption in branched oligothienylenevinylenes

2002 ◽  
Vol 209 (4-6) ◽  
pp. 461-466 ◽  
Author(s):  
I. Fuks-Janczarek ◽  
J-M. Nunzi ◽  
B. Sahraoui ◽  
I.V. Kityk ◽  
J. Berdowski ◽  
...  
Keyword(s):  
Optical Properties ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Photon Absorption ◽  
Third Order ◽  
Two Photon Absorption ◽  
Two Photon

Synthesis, DNA photocleavage, singlet oxygen photogeneration and two photon absorption properties of ruthenium-phenanthroline porphyrins

2015 ◽  
Vol 19 (09) ◽  
pp. 1046-1052 ◽  
Author(s):  
Ze-Bin Xu ◽  
Fa-Quan Yu ◽  
Fengshou Wu ◽  
Heng Zhang ◽  
Kai Wang ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Cross Section ◽  
Therapeutic Agents ◽  
Photon Absorption ◽  
Quantum Yields ◽  
Absorption Properties ◽  
Dna Photocleavage ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photochemical Properties

Through a new synthetic route, three ruthenium-phenanthroline porphyrins (RPP1, RPP2 and RPP3) were prepared. Their photophysical and photochemical properties, such as DNA photocleavage activity, singlet-oxygen photogeneration and two-photon absorption (2PA) were evaluated. These porphyrins 1–3 had substantial photocleavage activities, with 71%, 74% and 38% observed at 20 μM. The porphyrins with different substituents on phenathroline group had similar singlet oxygen quantum yields, with ΦΔ values at 0.52, 0.47 and 0.41, respectively. The 2PA cross-section (σ(2)) values of RPP 1–3, measured by the Z-scan method, were calculated to be 152, 172 and 135 GM, respectively, which were around 5-fold higher than that of H2TPP . Thus, these porphyrins, with their good photocleavage activities, 1 O 2 quantum yields and high 2PA cross section, suggest great potential as photodynamic therapeutic agents.

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