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Amplified Two‐Photon Absorption in Trans ‐A 2 B 2 ‐Porphyrins Bearing Nitrophenylethynyl Substituents
Author(s) -
NowakKról Agnieszka,
Wilson Craig J.,
Drobizhev Mikhail,
Kondratuk Dmitry V.,
Rebane Aleksander,
Anderson Harry L.,
Gryko Daniel T.
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201200507
Subject(s) - absorption (acoustics) , two photon absorption , photon , chemistry , resonance (particle physics) , absorption cross section , two photon excitation microscopy , photon energy , photochemistry , bearing (navigation) , molecular physics , atomic physics , cross section (physics) , analytical chemistry (journal) , optics , physics , fluorescence , laser , organic chemistry , quantum mechanics , astronomy
We show that peripheral nitro groups enhance the maximum two‐photon absorption cross‐section of trans ‐A 2 B 2 ‐porphyrins bearing two phenylethynyl substituents by more than one order of magnitude. Maximum values as high as 1000 GM result from realization of suitable conditions for effective resonance enhancement along with a lowering of the energy and intensification of the two‐photon allowed transitions in the Soret region.