http://repository.iitr.ac.in/handle/123456789/25128| Title: | Metal induced enhancement of fluorescence and modulation of two-photon absorption cross-section with a donor-acceptor-acceptor-donor receptor |
| Authors: | Das S. Nag A. Sadhu, Kalyan Kumar Goswami D. Bharadwaj P.K. |
| Published in: | Journal of Organometallic Chemistry |
| 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. © 2007 Elsevier B.V. All rights reserved. |
| Citation: | Journal of Organometallic Chemistry, 692(22): 4969-4977 |
| URI: | https://doi.org/10.1016/j.jorganchem.2007.07.013 http://repository.iitr.ac.in/handle/123456789/25128 |
| Issue Date: | 2007 |
| Keywords: | DFT Fluorescence Metal ion receptor OPA TPA |
| ISSN: | 0022328X |
| Author Scopus IDs: | 57188557622 57192178399 15726375100 7103162292 7005577636 |
| Author Affiliations: | Das, S., Department of Chemistry, Indian Institute of Technology, Kanpur, 208 016, India Nag, A., Department of Chemistry, Indian Institute of Technology, Kanpur, 208 016, India Sadhu, K.K., Department of Chemistry, Indian Institute of Technology, Kanpur, 208 016, India Goswami, D., Department of Chemistry, Indian Institute of Technology, Kanpur, 208 016, India Bharadwaj, P.K., Department of Chemistry, Indian Institute of Technology, Kanpur, 208 016, India |
| Funding Details: | Financial support received from DRDO & DST, New Delhi, India (to P.K.B.) is gratefully acknowledged. D.G. thanks DST, MCIT (India) and international SRF program of Welcome Trust (UK) for the financial grant. K.K.S. thanks CSIR for SRF and A.N. thanks UGC for SRF. Ministry of Communication and Information Technology, MCIT; Council for Scientific and Industrial Research, South Africa, CSIR; University Grants Committee, UGC; Defence Research and Development Organisation, DRDO; Department of Science and Technology, Government of West Bengal, DST |
| Corresponding Author: | Bharadwaj, P.K.; Department of Chemistry, , Kanpur, 208 016, India; email: pkb@iitk.ac.in |
| Appears in Collections: | Journal Publications [CY] |
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