scholarly journals E/Z Molecular Photoswitches Activated by Two-Photon Absorption: Comparison between Different Families

Molecules ◽  
2021 ◽  
Vol 26 (23) ◽  
pp. 7379
Author(s):  
Marco Marazzi ◽  
Cristina García-Iriepa ◽  
Carlos Benitez-Martin ◽  
Francisco Najera ◽  
Antonio Monari ◽  
...  
Keyword(s):  
Excited States ◽  
Cross Sections ◽  
Experimental Studies ◽  
Substitution Effect ◽  
Photon Absorption ◽  
Spatial Control ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Absorption Energy ◽  
Donor Acceptor

Nonlinear optical techniques as two-photon absorption (TPA) have raised relevant interest within the last years due to the capability to excite chromophores with photons of wavelength equal to only half of the corresponding one-photon absorption energy. At the same time, its probability being proportional to the square of the light source intensity, it allows a better spatial control of the light-induced phenomenon. Although a consistent number of experimental studies focus on increasing the TPA cross section, very few of them are devoted to the study of photochemical phenomena induced by TPA. Here, we show a design strategy to find suitable E/Z photoswitches that can be activated by TPA. A theoretical approach is followed to predict the TPA cross sections related to different excited states of various photoswitches’ families, finally concluding that protonated Schiff-bases (retinal)-like photoswitches outperform compared to the others. The donor-acceptor substitution effect is therefore rationalized for the successful TPA activatable photoswitch, in order to maximize its properties, finally also forecasting a possible application in optogenetics. Some experimental measurements are also carried out to support our conclusions.

Strategy towards large two-photon absorption cross-sections for diketopyrrolopyrroles

2015 ◽  
Vol 3 (4) ◽  
pp. 742-749 ◽  
Author(s):  
Anna Purc ◽  
Krzysztof Sobczyk ◽  
Yusuke Sakagami ◽  
Akihiro Ando ◽  
Kenji Kamada ◽  
...  
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor

Decorating diketopyrrolopyrroles with strongly electron-rich heterocycles led to donor–acceptor–donor architectures possessing two-photon brightness 850–1900 GM.

The Medium-Depending Fluorescence of Quadrupolar Donor-Acceptor-Donor Substituted Distyrylbenzenes with High Two-Photon Absorption Cross-Sections

2006 ◽  
Vol 937 ◽  
Author(s):  
Heiner Detert ◽  
Volker Schmitt ◽  
Stefan Glang
Keyword(s):  
Cross Sections ◽  
Visible Spectrum ◽  
Solvent Polarity ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Substitution Pattern ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor ◽  
Emitting Species

ABSTRACT1,4-Distyrylbenzenes with terminal dialkylamino groups and a central 2,5-disubstitution with electron-accepting groups were prepared via twofold Horner-olefination. These chromophores with a quadrupolar donor-acceptor-donor substitution and C2-symmetry absorb in the violet to green region of the visible spectrum exhibit large two-photon-absorption cross-sections when irrdiated in the NIR. Whereas a variation of the solvent polarity only slightly alters the absorption spectra, the fluorescence appears to be highly responsive. Besides a positive solvatochromism, the emission is very sensitive towards protonation. Quenching or appearance of new emitting species depends on the substitution pattern and is controlled by the concentration of the acid.

New trans-stilbene derivatives with large two-photon absorption cross-section and non-linear optical susceptibility values – a theoretical investigation

2015 ◽  
Vol 17 (18) ◽  
pp. 12299-12309 ◽  
Author(s):  
Varun Kundi ◽  
Pompozhi Protasis Thankachan
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Photon Absorption ◽  
Active Materials ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Optical Susceptibility ◽  
Trans Stilbene ◽  
Donor Acceptor ◽  
Stilbene Derivatives

In the present study, newly designed TSB derivatives decorated with suitable donor–acceptor groups have large TPA cross-sections and can be used as potential two-photon active materials.

Determination of Two-Photon Absorption Cross-Sections in Selected Diketo-Pyrrolo-Pyrroles

2019 ◽  
Vol 955 ◽  
pp. 37-43
Author(s):  
Martin Vala ◽  
Matouš Kratochvíl ◽  
Patricie Heinrichova ◽  
Martin Weiter
Keyword(s):  
Cross Sections ◽  
Photon Absorption ◽  
Absorption Cross ◽  
Strong Fluorescence ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor ◽  
Two Photon Fluorescence ◽  
Photon Fluorescence

The paper deals with determination of two-photon absorption cross-sections of selected representatives of diketo-pyrrolo-pyrrole. The materials were optimized in order to test the influence of various substitutions on the diketo-pyrrolo-pyrrole basic molecule. The two-photon absorption cross-sections were determined using two-photon excited fluorescence technique. A considerably high two-photon absorption cross-section in order of 1000 GM was found for non-symmetrically substituted derivative with donor-acceptor structure. All of the derivatives showed strong fluorescence in solid state visible by naked eye. These results demonstrate that this class of materials can be used in e.g. two-photon fluorescence microscopy in the form of nanoparticles.

scholarly journals Rational design of asymmetric red fluorescent probes for live cell imaging with high AIE effects and large two-photon absorption cross sections using tunable terminal groups

2016 ◽  
Vol 7 (7) ◽  
pp. 4527-4536 ◽  
Author(s):  
Zheng-Feng Chang ◽  
Ling-Min Jing ◽  
Bin Chen ◽  
Mengshi Zhang ◽  
Xiaolei Cai ◽  
...  
Keyword(s):  
Cross Sections ◽  
Live Cell Imaging ◽  
Rational Design ◽  
Cell Imaging ◽  
Live Cell ◽  
Photon Absorption ◽  
Red Emission ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Donor Acceptor

Donor–acceptor π-conjugated aggregation-induced red emission materials for live cell imaging.

Theoretical studies on the one- and two-photon absorption of tetrabenzoporphyrins and phthalocyanines

2004 ◽  
Vol 82 (1) ◽  
pp. 19-26 ◽  
Author(s):  
Xin Zhou ◽  
Ai-Min Ren ◽  
Ji-Kang Feng ◽  
Xiao-Juan Liu
Keyword(s):  
Dipole Moment ◽  
Cross Sections ◽  
Density Functional ◽  
Transition Dipole Moment ◽  
Photon Absorption ◽  
Transition Dipole ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Order Of Magnitude ◽  
The One

The one-photon absorption (OPA) properties of tetrabenzoporphyrins (TBPs) and phthalocyanines (Pcs) were studied using the semiempirical ZINDO method and time-dependent density functional theory (TDDFT), respectively. The compared results confirmed that the semiempirical ZINDO method was reasonably reliable when calculating the OPA of tetrabenzoporphyrins and phthalocyanines. On the basis of the OPA properties obtained from the ZINDO method, two-photon absorption (TPA) properties of two series of molecules were investigated, using ZINDO and sum-over-states (SOS) methods. The results showed that the TPA cross-sections of all molecules were in the range of 220.6 × 10–50 – 345.9 × 10–50 cm4·s·photon–1, which were in the same order of magnitude as the values reported in the literature. The relatively larger δ(ω) value for Pcs with respect to that for corresponding TBPs originates from larger intramolecular charge transfer, which can be characterized by the difference of dipole moment between S0 and S1 and the transition dipole moment between S1 and S5.Key words: two-photon absorption, ZINDO, sum-over-states, tetrabenzoporphyrin, phthalocyanines.

Fluorescence anisotropy in indole under two-photon excitation in the spectral range 385–510 nm

2018 ◽  
Vol 20 (30) ◽  
pp. 19922-19931 ◽  
Author(s):  
M. E. Sasin ◽  
A. G. Smolin ◽  
K.-H. Gericke ◽  
E. Tokunaga ◽  
O. S. Vasyutinskii
Keyword(s):  
Propylene Glycol ◽  
Excited States ◽  
Spectral Range ◽  
Ground State ◽  
Fluorescence Anisotropy ◽  
Photon Absorption ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Photon Excitation ◽  
Molecular Ground State

This paper presents the detailed study of two-photon excited fluorescence in indole dissolved in propylene glycol produced by two-photon absorption from the molecular ground state to several high lying excited states.

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