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Title: The synthesis and characterization of 7-hydroxy-4-methylcoumarin and the investigation of the fluorescence properties of its 7-hydroxy-4-methylcoumarin-chitosan films

Chitosan fluorescent films containing 7-hydroxy-4-methylcoumarin (7H4MC) have been successfully prepared. Used chitosan was obtained from chitin isolated from skin of tiger prawns (Penaeus monodon) through the deproteination, demineralization, and deacetylation process. The yields of chitin and chitosan are 10.66% and 23.83%, respectively. The chitosan has 55.00% degree of deacetylation based on FTIR spectroscopy. Average molecular mass of chitosan which was determined by Ostwald viscometry method is 8.55 × 10{sup 6} g/mol. The 7H4MC was synthesized from resorcinol and ethyl acetoacetate using amberlyst-15 as catalyst based on Pechmann reaction with chemical yields of 90.01% and the melting point of 189–190°C. The FTIR, {sup 1}H–NMR, and {sup 13}C–NMR spectroscopies confirmed the structure which corresponds to the structure of 7H4MC. The films of chitosan containing 7H4MC were prepared by solvent evaporation method in 2% (v/v) acetic acid. The 7H4MC content in each film was 0% (blank), 0.2%, 0.4%, 0.6%, and 0.8% (w/w). The UV-Vis spectrum of 7H4MC in methanol showed λ{sub max} at 235 and 337 nm. The observed fluorescence is the fluorescence color of cyan. The excitation wavelengths are 200, 235, 275, 337, and 365 nm. The highest intensity of cyan color fluorescence of chitosan containing 7H4MC films was obtained at themore » concentration of 0.2% of 7-hydroxy-4-methylcoumarin at the excitation wavelength of 275 nm.« less
Authors:
 [1] ;  [2] ;  [3]
  1. Organic Chemistry Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia)
  2. Chemistry Study Program, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia)
  3. Inorganic and Physical Chemistry Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132 (Indonesia)
Publication Date:
OSTI Identifier:
22265958
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1589; Journal Issue: 1; Conference: ICMNS 2012: 4. international conference on mathematics and natural sciences: Science for health, food and sustainable energy, Bandung (Indonesia), 8-9 Nov 2012; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; ACETIC ACID; CATALYSTS; CHITIN; DEMINERALIZATION; EVAPORATION; EXCITATION; FILMS; FLUORESCENCE; FOURIER TRANSFORMATION; INFRARED SPECTRA; MELTING POINTS; METHANOL; OLIGOSACCHARIDES; RESORCINOL; SOLVENTS; SPECTROSCOPY; SYNTHESIS; WAVELENGTHS