Effects of conjugation length and resonance enhancement on two-photon absorption in phenylene–vinylene oligomers

2008 ◽  
Vol 10 (8) ◽  
pp. 1177-1191 ◽  
Author(s):  
Mette Johnsen ◽  
Martin J. Paterson ◽  
Jacob Arnbjerg ◽  
Ove Christiansen ◽  
Christian B. Nielsen ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Phenylene Vinylene ◽  
Conjugation Length ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Resonance Enhancement

scholarly journals Impact of the Subunit Arrangement on the Nonlinear Absorption Properties of Organometallic Complexes with Ruthenium(II) σ-Acetylide and Benzothiadiazole as Building Units §

Inorganics ◽  
2019 ◽  
Vol 7 (5) ◽  
pp. 67
Author(s):  
Eleonora Garoni ◽  
Alessia Colombo ◽  
Kenji Kamada ◽  
Claudia Dragonetti ◽  
Dominique Roberto
Keyword(s):  
Electron Acceptor ◽  
Cross Sections ◽  
Nonlinear Absorption ◽  
Organometallic Complexes ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Absorption Properties ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Resonance Enhancement

In this paper, the nonlinear absorption properties of two complexes consisting of Ru(C≡CPh)(C≡C)(dppe)2 (dppe = Ph2PCH2CH2PPh2) as electron donor (D) and 4,7-di(2-thienyl)benzo[c][1,2,5]thiadiazole as electron acceptor (A) units in two different arrangement, i.e., A–D–A and D–A–D, are presented. They were measured in solution by the femtosecond open-aperture Z-scan method. The complexes show moderate two-photon absorption cross-sections σ(2) of several hundred to one thousand GM (here 1 GM = 10−50 cm4 s molecule−1 photon−1). Although they are formed by the same building units, it was found that the two-photon absorption values of the D–A–D arrangement are six times higher than that of the A–D–A one. This difference can be explained by the number of metal cores (one or two ruthenium centers), the geometrical configurations of the complexes (more or less planar), and the resonance enhancement by lowering the intermediate state.

Resonance Enhancement of the Two-Photon Absorption in PbS Quantum Dots

2010 ◽  
Author(s):  
Gero Nootz ◽  
Lazaro A. Padilha ◽  
Scott Webster ◽  
David J. Hagan ◽  
Eric W. Van Stryland ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Resonance Enhancement ◽  
Pbs Quantum Dots

Resonance Enhancement of Two-Photon Absorption in Fluorescent Proteins

2007 ◽  
Vol 111 (50) ◽  
pp. 14051-14054 ◽  
Author(s):  
M. Drobizhev ◽  
N. S. Makarov ◽  
T. Hughes ◽  
A. Rebane
Keyword(s):  
Fluorescent Proteins ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Resonance Enhancement

Phenylene Vinylene Platinum(II) Acetylides with Prodigious Two-Photon Absorption

2012 ◽  
Vol 134 (47) ◽  
pp. 19346-19349 ◽  
Author(s):  
Galyna G. Dubinina ◽  
Randi S. Price ◽  
Khalil A. Abboud ◽  
Geoffrey Wicks ◽  
Pawel Wnuk ◽  
...  
Keyword(s):  
Photon Absorption ◽  
Phenylene Vinylene ◽  
Two Photon Absorption ◽  
Two Photon

Soluble meso-tetrakis(arylethynyl)porphyrins — synthesis and optical properties

2014 ◽  
Vol 18 (10n11) ◽  
pp. 998-1013 ◽  
Author(s):  
Agnieszka Nowak-Król ◽  
Łukasz G. Łukasiewicz ◽  
Joy E. Haley ◽  
Mikhail Drobizhev ◽  
Aleksander Rebane ◽  
...  
Keyword(s):  
Optical Properties ◽  
Red Light ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Resonance Enhancement ◽  
Order Of Magnitude ◽  
Homo And Lumo ◽  
The One ◽  
First Time

Trans- A 2 B 2-tetrakis(arylethynyl)porphyrins with suitable solubility in CH 2 Cl 2, CHCl 3, EtOAc , acetone and toluene have been obtained for the first time. Among two possible strategies the one comprising the synthesis of 5,15-dibromo-10,20-bis[(isopropylsilyl)ethynyl]porphyrin proved to be more efficient. The pathway towards densely substituted arylacetylenes has been optimized. The use of previously identified 3,4,5-trialkoxyaryl substituent was crucial for achieving the reasonable solubility. The optical properties of meso-substituted tetrakis(arylethynyl)porphyrins were studied showing that strong polarization imparted by direct conjugation of all four substituents with porphyrin core resulted not only in strong absorption of red light but also in a relatively long triplet lifetime. Meso-tetrakis(arylethynyl)porphyrins have a significantly longer lifetime of T1 state than bis(arylethynyl)porphyrins and in their case all the states are mixtures of transitions between the HOMO-1, HOMO and LUMO, LUMO+1 MOs. We show that the presence of two additional arylethynyl substituents at meso-positions enhance the maximum two-photon absorption cross-section of trans- A 2 B 2-tetrakis(arylethynyl)porphyrins by more than one order of magnitude. Maximum values as high as σ2 = 500 GM at 950 nm result from realization of suitable conditions for effective resonance enhancement along with a lowering of the energy and intensification of the two-photon allowed transitions in the Soret region.

Resonance enhancement of two-photon absorption in porphyrins

2002 ◽  
Vol 355 (1-2) ◽  
pp. 175-182 ◽  
Author(s):  
Mikhail Drobizhev ◽  
Aliaksandr Karotki ◽  
Mikalai Kruk ◽  
Aleksander Rebane
Keyword(s):  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Resonance Enhancement

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.

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