Dalton Transactions (Print Edition) 2015-08-28

Sn(II) induced concentration dependent dynamic to static excimer conversion of a conjugated naphthalene derivative.

Susanta Adhikari, Sandip Mandal, Avijit Ghosh, Subhajit Guria, Debasis Das

Index: Dalton Trans. 44 , 14388-93, (2015)

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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.

Related Compounds

  • p-Cresol
  • 1-Aminonaphthalene

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