The effects of extended π-conjugation in bipyridyl ligands on the tunable photophysics, triplet excited state and optical limiting properties of Pt(ii) naphthalimidyl acetylide complexes

2019 ◽  
Vol 48 (40) ◽  
pp. 15105-15113 ◽  
Author(s):  
Senqiang Zhu ◽  
Hao Liu ◽  
Kunyan Wang ◽  
Qian Cheng ◽  
Zhenxing Ma ◽  
...  
Keyword(s):  
Excited State ◽  
Optical Power ◽  
Optical Limiting ◽  
Triplet Excited State ◽  
Excited State Lifetimes ◽  
Optical Power Limiting

Pt(ii) complexes that exhibit long-lived triplet excited state lifetimes are promising for optical power limiting materials.

Slipped-cofacial J-type phthalocyanine dimers as potential non-linear absorbers for optical limiting applications

2016 ◽  
Vol 40 (10) ◽  
pp. 8262-8270 ◽  
Author(s):  
Alexander Yu. Tolbin ◽  
Alexander V. Dzuban ◽  
Evgeny V. Shulishov ◽  
Larisa G. Tomilova ◽  
Nikolay S. Zefirov
Keyword(s):  
Self Assembly ◽  
Spectral Properties ◽  
Solid Phase ◽  
Optical Power ◽  
Optical Limiting ◽  
Non Linear ◽  
Optical Power Limiting

Phthalocyanine J-type dimers show unusual spectral properties and self-assembly in the solid phase. The optical power limiting effect was theoretically investigated.

Excited State Absorption in Dendrimers Incorporating Diphenylaminodiphenylpolyene Moieties Via Photo-Induced Electron Transfer

1999 ◽  
Vol 597 ◽  
Author(s):  
W. Sonnenberg ◽  
A Hyfield ◽  
K Short ◽  
L. Spangler ◽  
C. Spangler
Keyword(s):  
Electron Transfer ◽  
Excited State ◽  
Excited States ◽  
Cross Sections ◽  
Excited State Absorption ◽  
Optical Power ◽  
Triplet States ◽  
New Material ◽  
Photo Induced Electron Transfer ◽  
Optical Power Limiting

AbstractDuring the past decade there has been considerable progress in the design of new organic materials for optical power limiting (OPL) applications. Among the more promising of the new material approaches are reverse saturable absorbers (RSAs) which derive their optical limiting capability from the photogeneration of highly absorbing transient excited states. Most of the previous research in this field has focused on excited state absorption from singlet or triplet states whose cross-sections are greater than the original S0 – S1 transition- However, other transient states, such as polaronic radical ions or bipolaronic diions, formed by photo-induced electron transfer, are attractive alternatives. We have initiated studies to determine if these transient charge states can be photo-generated efficiently, and if their excited states absorption and lifetimes are acceptable for current optical power limiting requirements.

scholarly journals Orthogonally Aligned Cyclic BODIPY Arrays with Long-lived Triplet Excited States as Efficient Heavy-Atom-Free Photosensitizers

2021 ◽  
Author(s):  
Zhaoyang Zhu ◽  
Xue Zhang ◽  
Xing Guo ◽  
Qing-Hua Wu ◽  
Zhongxin Li ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Excited State ◽  
Excited States ◽  
Heavy Atom ◽  
Triplet Excited State ◽  
Transfer Processes ◽  
Excited State Lifetimes ◽  
Triplet Excited States

Photosensitizers with long triplet excited state lifetimes are key to their efficient electron transfer or energy transfer processes. Herein, we report a novel class of cyclic trimeric BODIPY arrays which...

BROADBAND OPTICAL LIMITING USING TANDEM FILTERS WITH MULTIPHOTON ABSORBER AND REVERSE SATURABLE ABSORBERS

2000 ◽  
Vol 09 (04) ◽  
pp. 523-530 ◽  
Author(s):  
P. FENEYROU
Keyword(s):  
Optical Power ◽  
Optical Limiting ◽  
Experimental Results ◽  
Saturable Absorption ◽  
Reverse Saturable Absorption ◽  
Nonlinear Transmission ◽  
Saturable Absorbers ◽  
Transient Spectroscopy ◽  
Limiting Efficiency ◽  
Optical Power Limiting

We report experimental results on a tin phthalocyanine: the nanosecond transient spectroscopy shows a reverse saturable absorption between 490–530 nm and 550–700 nm and the nonlinear transmission provides a better optical power limiting efficiency from 570 nm to 700 nm compared to C 60. This molecule is then combined in a tandem filter with a multiphoton absorber and a mixture of reverse saturable absorbers to achieve neutral-color broadband protection against ns pulses: the transmitted energy is clamped below 2 μ J throughout the visible.

Disilane-Bridged Architectures with High Optical Transparency for Optical Limiting

2021 ◽  
Author(s):  
Hongjie Feng ◽  
Zhikuan Zhou ◽  
Aviwe May ◽  
Jiaying Chen ◽  
John Mack ◽  
...  
Keyword(s):  
Optical Power ◽  
Optical Limiting ◽  
Optical Transparency ◽  
High Transparency ◽  
Optical Power Limiting

A novel tetraphenylethylene (TPE) architecture that makes use of a disilane bridge was developed to successfully prepare organic optical power limiting (OPL) materials with high transparency. The σ-bridged TPE derivatives...

Two-photon absorption-based optical limiting in 2-(2-methoxybenzyllideneamino)-5-methylphenylmercuric chloride-doped PMMA film

2014 ◽  
Vol 28 (10) ◽  
pp. 1450079 ◽  
Author(s):  
Qusay Mohammed Ali Hassan
Keyword(s):  
Continuous Wave ◽  
Optical Power ◽  
Optical Limiting ◽  
Photon Absorption ◽  
Pmma Film ◽  
Potential Candidate ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Cw Laser ◽  
Optical Power Limiting

The synthesis and the linear and optical limiting properties of a 2-(2-methoxybenzyllideneamino)-5-methylphenylmercuric chloride-doped poly(methylmethacrylate) (PMMA) film are described. The sample exhibits strong optical power limiting under continuous wave (cw) laser at the experimental wavelength. The mechanisms for the optical limiting were discussed on the basis of the two-photon absorption involved in the process. The nonlinear absorption coefficient β of the sample is estimated and its value is found to be 67 × 10-2 cm/W. Our study indicated that the investigated compound-doped PMMA film is a potential candidate for optical limiting applications in low power cw regime.

scholarly journals Unraveling the Two-Photon and Excited-State Absorptions of Aza-BODIPY Dyes for Optical Power Limiting in the SWIR Band

2019 ◽  
Vol 123 (38) ◽  
pp. 23661-23673 ◽  
Author(s):  
Simon Pascal ◽  
Quentin Bellier ◽  
Sylvain David ◽  
Pierre-Antoine Bouit ◽  
San-Hui Chi ◽  
...  
Keyword(s):  
Excited State ◽  
Optical Power ◽  
Two Photon ◽  
Swir Band ◽  
Optical Power Limiting

scholarly journals Synthesis and optical power limiting properties of heteroleptic Mo3S7 clusters

2015 ◽  
Vol 44 (29) ◽  
pp. 13163-13172 ◽  
Author(s):  
David Recatalá ◽  
Rosa Llusar ◽  
Adam Barlow ◽  
Genmiao Wang ◽  
Marek Samoc ◽  
...  
Keyword(s):  
Optical Power ◽  
Optical Limiting ◽  
Mixed Ligand ◽  
Limiting Behavior ◽  
Optical Power Limiting

A series of mixed-ligand diimine–halide and diimine–dithiolene clusters based on the Mo3S7 core have been synthesized. Their optical limiting behavior was assessed by Z-scan techniques, and compared to that of a dithiolene Mo2O2S2-based cluster.

scholarly journals Ultra long‐lived triplet excited state in water at room temperature: Insights on the molecular design of tridecafullerenes

2021 ◽  
Author(s):  
Javier Ramos-Soriano ◽  
Alfonso Pérez-Sánchez ◽  
Sergio Ramírez-Barroso ◽  
Beatriz M. Illescas ◽  
Khalid Azmani ◽  
...  
Keyword(s):  
Excited State ◽  
Room Temperature ◽  
Molecular Design ◽  
Triplet Excited State

scholarly journals Triplet energies and excimer formation in meta - and para -linked carbazolebiphenyl matrix materials

2015 ◽  
Vol 373 (2044) ◽  
pp. 20140446 ◽  
Author(s):  
Sergey A. Bagnich ◽  
Alexander Rudnick ◽  
Pamela Schroegel ◽  
Peter Strohriegl ◽  
Anna Köhler
Keyword(s):  
Excited State ◽  
Triplet State ◽  
Spectroscopic Investigation ◽  
Triplet Excited State ◽  
Conjugation Length ◽  
Triplet Energy ◽  
Excimer Formation

We present a spectroscopic investigation on the effect of changing the position where carbazole is attached to biphenyl in carbazolebiphenyl (CBP) on the triplet state energies and the propensity to excimer formation. For this, two CBP derivatives have been prepared with the carbazole moieties attached at the ( para ) 4- and 4 ′ -positions ( p CBP) and at the ( meta ) 3- and 3 ′ -positions ( m CBP) of the biphenyls. These compounds are compared to analogous m CDBP and p CDBP, i.e. two highly twisted carbazoledimethylbiphenyls, which have a high triplet energy at about 3.0 eV and tend to form triplet excimers in a neat film. This torsion in the structure is associated with localization of the excited state onto the carbazole moieties. We find that in m CBP and p CBP, excimer formation is prevented by localization of the triplet excited state onto the central moiety. As conjugation can continue from the central biphenyls into the nitrogen of the carbazole in the para -connected p CBP, emission involves mainly the benzidine. By contrast, the meta -linkage in m CBP limits conjugation to the central biphenyl. The associated shorter conjugation length is the reason for the higher triplet energy of 2.8 eV in m CBP compared with the 2.65 eV in p CBP.

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