title: Sn(II) induced concentration dependent dynamic to static excimer conversion of a conjugated naphthalene derivative.
abstract: The X-ray structurally characterized naphthalene appended diformyl-p-cresol derivative () selectively detects Sn(2+) by both colorimetric and fluorescence methods. In the presence of Sn(2+), exhibits a monomer emission at 420 nm along with a strong red excimer emission at 582 nm in acetonitrile. The excimer formation highly depends on Sn(2+) concentration. The dynamic excimer, observed with up to 2.5 equivalents of Sn(2+), gradually converts to a static form above 2.5 equivalents of Sn(2+). Moreover, in a different solvent media, viz. in aqueous methanol, can also detect Al(3+) through the generation of intense green fluorescence. The photophysical interactions are rationalized by (1)H NMR, mass spectra, steady state and lifetime fluorescence measurements. DFT studies support the experimental findings.
authors.affiliation: Department of Chemistry, University of Calcutta, 92, A.P.C. Road, Kolkata 700 009, West Bengal, India. adhikarisusanta@yahoo.com.
authors.forename: Susanta
authors.initials: S
authors.lastname: Adhikari
authors.forename: Sandip
authors.initials: S
authors.lastname: Mandal
authors.forename: Avijit
authors.initials: A
authors.lastname: Ghosh
authors.forename: Subhajit
authors.initials: S
authors.lastname: Guria
authors.forename: Debasis
authors.initials: D
authors.lastname: Das
mesh_terms: D003408:Cresols / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D008956:Models, Chemical; D015394:Molecular Structure; D009281:Naphthalenes / Q000737:chemistry*; D011789:Quantum Theory; D013050:Spectrometry, Fluorescence; D014001:Tin / Q000737:chemistry*
chemical_list: D003408:Cresols; D005456:Fluorescent Dyes; D009281:Naphthalenes; C032538:4-cresol; D014001:Tin