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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Guchhait, Nikhil Samanta, Anuva Bhattacharya, Subhash Chandra |
| Description | Country affiliation: India Author Affiliation: Samanta A ( Department of Chemistry, Jadavpur University Raja S.C. Mallick Road, Kolkata 700 032, India.); Guchhait N ( Department of Chemistry, University of Calcutta 92, A.P.C. Road, Kolkata 700 009, India. Electronic address: nguchhait@yahoo.com.); Bhattacharya SC ( Department of Chemistry, Jadavpur University Raja S.C. Mallick Road, Kolkata 700 032, India. Electronic address: sbjuchem@yahoo.com.) |
| Abstract | In the present contribution, we have explored ground and excited state spectroscopic properties of an antiexcitotoxic and anticonvulsant drug, Kynurenic acid (KA), through steady-state absorption, emission and time-resolved emission spectroscopy and quantum chemical calculations. The main focus of this article is to illustrate the effects of various parameters such as the nature of the solvents and pH of the medium on the spectral properties of KA which confirms the presence of different neutral and ionic species in the ground and excited states. The molecule KA exists mainly as keto- or anionic form in the ground state, whereas the main contribution of its emission is arising from the keto tautomer in the excited state. Quantum chemical calculations by Density Functional Theory (DFT) method has been effectively employed to correlate the experimental findings. The ground and excited state properties of KA ascertained by means of experimental and theoretical method reveal that it resembles well with other two compounds, 4-hydroxyquinoline and xanthurenic acid formed by the decomposition of UV filters. |
| ISSN | 13861425 |
| Volume Number | 129 |
| e-ISSN | 18733557 |
| Journal | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-08-14 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Kynurenic Acid Chemistry Photosensitizing Agents Hydrogen-ion Concentration Hydroxyquinolines Models, Molecular Quantum Theory Spectrometry, Fluorescence Spectrophotometry, Ultraviolet Xanthurenates Journal Article Research Support, Non-u.s. Gov't Discipline Spectroscopy |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Atomic and Molecular Physics, and Optics Analytical Chemistry Instrumentation |
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