Effects of Conjugation Length, Electron Donor and Acceptor Strengths on Two-Photon Absorption Cross Sections of Asymmetric Zinc-Porphyrin Derivatives
2006 (English)In: Journal of Chemical Physics, ISSN 0021-9606, E-ISSN 1089-7690, Vol. 124, no 9, 094310- p.Article in journal (Refereed) Published
Exceptionally large two-photon absorption cross sections at the infrared region have been revealed by time-dependent density functional theory calculations for asymmetric charge-transfer conjugated zinc-porphyrin derivatives. The largest two-photon cross section is found to be more than one order of magnitude larger than for the conventional two-photon active organic molecules. The calculations show that the formation of strong charge-transfer states depends on the length of the conjugation bridge between the zinc-porphyrin core and the electron donor/acceptor. The two-photon absorption cross section can be greatly enhanced by increasing the strengths of the electron donor/acceptor.
Place, publisher, year, edition, pages
2006. Vol. 124, no 9, 094310- p.
MULTIPHOTON MICROSCOPY, CHROMOPHORES, MOLECULES, DESIGN, LASER
IdentifiersURN: urn:nbn:se:kth:diva-5087DOI: 10.1063/1.2178790ISI: 000235828300024ScopusID: 2-s2.0-34547926404OAI: oai:DiVA.org:kth-5087DiVA: diva2:7842
QC 20100910. Uppdaterad från In press till Published (20100910)2005-04-282005-04-282010-09-10Bibliographically approved