Two-photon absorption of metal–organic DNA-probes
Artikel i vetenskaplig tidskrift, 2012

We report remarkable multiphoton absorption properties of DNA intercalating ruthenium complexes: (1) [Ru(phen)2dppz]2+; (2) [(11,11′-bidppz)(phen)4Ru2]4+; (3) [11,11′-bipb(phen)4Ru2]4+. Two-photon spectra in the range from 460 to 1100 nm were measured using the Z-scan technique. In particular, complex 2 was found to exhibit very strong two- and three-photon absorption properties, which could be an effect of symmetric charge transfer from the ends towards the middle of the conjugated dimeric orbital system. We propose that these molecules could provide a new generation of DNA binding nonlinear chromophores for wide applications in biology and material science. The combination of a large two-photon cross section and strong luminescence quantum yields for the molecules when intercalated makes the compounds uniquely bright and photo-stable probes for two-photon luminescence imaging and also promising as enhanced photosensitizers in two-photon sensitizing applications.

Författare

Piotr Hanczyc

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Bengt Nordén

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Marek Samoc

Wrocław University of Science and Technology

Dalton Transactions

1477-9226 (ISSN) 1477-9234 (eISSN)

Vol. 41 3123-3125

Styrkeområden

Nanovetenskap och nanoteknik

Energi

Livsvetenskaper och teknik

Materialvetenskap

Ämneskategorier

Annan medicinsk grundvetenskap

DOI

10.1039/c2dt12264b