Journal ArticleDOI
Design and synthesis of dendrimers with enhanced two-photon absorption
El Hadj Elandaloussi,Charles W. Spangler,Carl W. Dirk,Martin K. Casstevens,D. Kumar,Ryszard Burzynski +5 more
TLDR
In this article, a model dendrimers based on bis-(diphenylamino)stilbene repeat units have been synthesized and shown to have very stable bipolaronic charge states.Abstract:
Model dendrimers based on bis-(diphenylamino)stilbene repeat units have been synthesized and shown to have very stable bipolaronic charge states. Calculations at the AM-1 level predict two orders magnitude enhancement in the third-order nonlinearity in going from the neutral to bipolaron state. Measurement of two-photon cross-sections for PPV dimers with attached diphenylamino donor groups show enhanced two-photon cross-sections for ns pulses. Preliminary evaluation of one of the model dendrimers indicates even larger two-photon cross-sections are possible.read more
Citations
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Journal ArticleDOI
Optical Power Limiters for Nanosecond Pulses: Design of New Dendritic Chromophores with Exceptionally Large Two-Photon Cross-Sections
El Hadj Elandaloussi,Charles W. Spangler,Martin K. Casstevens,D. Kumar,J. Weibel,Ryszard Burzynski,Guang S. He,Priya Prasad +7 more
TL;DR: In this article, the applicability of dendritic strctures based on photonic active repeat units for enhancing two-photon absorption has been reviewed, particularly in the area of optical power limiting applications.
Journal ArticleDOI
Photonic Properties of Dendrons and Dendrimers Incorporating Bis-(Diphenylphosphino)Diphenylpolyenes
TL;DR: In this article, the authors review the recent activity in designing new chromophores wherein P replaces N in donor groups and dendrimer building blocks, and the consequences and opportunities resulting from the observed large blue shifts in the spectra.
References
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Journal ArticleDOI
Design of Organic Molecules with Large Two-Photon Absorption Cross Sections
Marius A. Albota,David Beljonne,Jean-Luc Brédas,J. E. Ehrlich,Jia Ying Fu,Ahmed A. Heikal,Samuel E. Hess,Thierry Kogej,Michael D. Levin,Seth R. Marder,D. McCord-Maughon,Joseph W. Perry,H. Rockel,Mariacristina Rumi,Girija Subramaniam,Watt W. Webb,Xiang Li Wu,Chris Xu +17 more
TL;DR: The combination of large delta and high fluorescence quantum yield or triplet yield exhibited by molecules developed here offers potential for unprecedented brightness in two-photon fluorescent imaging or enhanced photosensitivity in two -photon sensitization, respectively.
Journal ArticleDOI
Highly Active Two-Photon Dyes: Design, Synthesis, and Characterization toward Application
Bruce A. Reinhardt,Lawrence L. Brott,Stephen J. Clarson,Ann G. Dillard,Jayprakash C. Bhatt,Ramamurthi Kannan,Lixiang Yuan,Guang S. He,Paras N. Prasad +8 more
TL;DR: A series of compounds with systematically varied molecular structures which exhibit very large effective two-photon cross sections has been synthesized and characterized in solution using a nonlinear transmission technique as mentioned in this paper, and the results of the study indicate that with the incorporation of certain combinations of structural elements, dyes can be synthesized which have greatly increased effective cross sections as high as 152.5 × 10-48 cm4 s/photon molecule in benzene solution at 800 nm using 8 ns pulses.
Book ChapterDOI
Genealogically directed synthesis: Starburst/cascade dendrimers and hyperbranched structures
Journal ArticleDOI
Two-Photon Absorbing Organic Chromophores for Optical Limiting
J. E. Ehrlich,X. L. Wu,I. Y.S. Lee,Ahmed A. Heikal,Z.-Y. Hu,H. Rockel,Seth R. Marder,Joseph W. Perry +7 more
TL;DR: In this article, strong optical limiting and large two-photon absorptivities are reported for a class of bisdonor diphenylpolyene derivatives with varying polyene bridge lengths.
Proceedings ArticleDOI
Bipolaronic-enhanced third-order nonlinearity in organic ladder polymers
TL;DR: In this article, the third order nonlinear optical properties of organic ladder copolymer (POL) system were investigated using degenerate four-wave mixing with a picosecond laser pulse.