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Revealing Spectral Features in Two-Photon Absorption Spectrum of Hoechst 33342: A Combined Experimental and Quantum-Chemical Study
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology. Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, PL-50370 Wrocław, Poland .
KTH, School of Biotechnology (BIO), Theoretical Chemistry and Biology.ORCID iD: 0000-0003-0185-5724
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2013 (English)In: Journal of Physical Chemistry B, ISSN 1520-6106, E-ISSN 1520-5207, Vol. 117, no 40, 12013-12019 p.Article in journal (Refereed) Published
Abstract [en]

We present the results of wide spectral range Z-scan measurements of the two-photon absorption (2PA) spectrum of the Hoechst 33342 dye. The strongest 2PA of the dye in aqueous solution is found at 575 nm, and the associated two-photon absorption cross section is 245 GM. A weak but clearly visible 2PA band at similar to 850 nm is also observed, a feature that could not be anticipated from the one-photon absorption spectrum. On the basis of the results of hybrid quantum mechanics/molecular mechanics calculations, we put forward a notion that the long-wavelength feature observed in the two-photon absorption spectrum of Hoechst 33342 is due to the formation of dye aggregates.

Place, publisher, year, edition, pages
2013. Vol. 117, no 40, 12013-12019 p.
Keyword [en]
Optical Nonlinearities, DNA, Binding, Microscopy, Excitation
National Category
Physical Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-134741DOI: 10.1021/jp407144kISI: 000326367000012Scopus ID: 2-s2.0-84885631119OAI: oai:DiVA.org:kth-134741DiVA: diva2:669183
Note

QC 20131203

Available from: 2013-12-03 Created: 2013-11-28 Last updated: 2017-12-06Bibliographically approved

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Natarajan Arul, MurganÅgren, Hans

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