Das, Sanjib ; Nag, Amit ; Sadhu, Kalyan K. ; Goswami, Debabrata ; Bharadwaj, Parimal K. (2007) Metal induced enhancement of fluorescence and modulation of two-photon absorption cross-section with a donor-acceptor-acceptor-donor receptor Journal of Organometallic Chemistry, 692 (22). pp. 4969-4977. ISSN 0022-328X
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Official URL: http://www.sciencedirect.com/science/article/pii/S...
Related URL: http://dx.doi.org/10.1016/j.jorganchem.2007.07.013
Abstract
A metal ion sensing fluorophore L that exhibits a large two-photon absorption cross-section has been synthesized in good yields. The influences of different metal ion inputs, on the one- and two-photon spectroscopic properties of L, have been investigated. The ligand itself does not show any fluorescence although in presence of a metal ion like Zn(II), Cd(II), Mg(II) or Ca(II), a ~25 time enhancement of fluorescence is observed. The ligand with symmetrical "donor-acceptor-acceptor-donor" characteristics exhibits a large two-photon absorption cross-section measured by femtosecond open-aperture Z-scan technique at 880 nm. However, presence of any of the above metal ions lowers its two-photon absorption cross-section (δ ) to different extents at 880 nm. Theoretical calculation carried out in DFT formalism on the ligand and its Zn(II) complex corroborate experimental results.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Elsevier Science. |
| Keywords: | Metal Ion Receptor; OPA; TPA; Fluorescence; DFT |
| ID Code: | 78691 |
| Deposited On: | 23 Jan 2012 03:55 |
| Last Modified: | 23 Jan 2012 03:55 |
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