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Coumarin derived chromophores in the donor-acceptor-donor format that gives fluorescence enhancement and large two-photon activity in presence of specific metal ions
, A. Nag, A. Jana, D. Goswami, P.K. Bharadwaj
Published in Elsevier S.A.
Volume: 363
Issue: 12
Pages: 2824 - 2832
Two coumarin derived dyes (compounds La and L) have been synthesized in high yields by Schiff base condensation. On probing with a femtosecond laser, none of these compounds show any two-photon activity in the wavelength range, 760-860 nm. However, La in presence of Zn(II) and L in presence of Mg(II), exhibit large two-photon absorption as well as emission in the same wavelength range. Theoretical calculations at the B3LYP functional with 6-31G and LanL2DZ mixed basis set under DFT formalism support experimental results. © 2010 Elsevier B.V. All rights reserved.
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Published in Elsevier S.A.
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