The vapochromic properties of a fluorescent 3-[2-(4-nitrophenyl) ethenyl]-1-(2-ethylhexyl)-2-methylindole (NPEMI-E) characterized by intramolecular charge transfer (ICT) character, dispersed in polycarbonate (PC) films is reported. NPEMI-E solvatochromism is investigated by means of experimental and computational methods. Fluorescent PC films containing 0.1 wt % of NPEMI-E are prepared and exposed to saturated atmospheres of different volatile organic compounds (VOCs). NPEMI-E/PC films show remarkable and reversible vapochromism when exposed to VOCs with high polarity index and favorable interaction with PC matrix such as CHCl3. Only minor variations in the emission wavelength are actually recorded for all other classes of VOCs investigated. The hue parameter is also used for the effective extraction of spectral information from digital color images without the need for wavelength discriminators. Overall, the present results support the use of NPEMI-E/PC films for the cost-effective detection of CHCl3 vapors.

Highly selective vapochromic fluorescence of polycarbonate films Doped with an ICT-Based solvatochromic probe

Minei, Pierpaolo;PUCCI, ANDREA
2017

Abstract

The vapochromic properties of a fluorescent 3-[2-(4-nitrophenyl) ethenyl]-1-(2-ethylhexyl)-2-methylindole (NPEMI-E) characterized by intramolecular charge transfer (ICT) character, dispersed in polycarbonate (PC) films is reported. NPEMI-E solvatochromism is investigated by means of experimental and computational methods. Fluorescent PC films containing 0.1 wt % of NPEMI-E are prepared and exposed to saturated atmospheres of different volatile organic compounds (VOCs). NPEMI-E/PC films show remarkable and reversible vapochromism when exposed to VOCs with high polarity index and favorable interaction with PC matrix such as CHCl3. Only minor variations in the emission wavelength are actually recorded for all other classes of VOCs investigated. The hue parameter is also used for the effective extraction of spectral information from digital color images without the need for wavelength discriminators. Overall, the present results support the use of NPEMI-E/PC films for the cost-effective detection of CHCl3 vapors.
Ahmad, Muzaffer; Platonova, Irina; Battisti, Antonella; Minei, Pierpaolo; Brancato, Giuseppe; Pucci, Andrea
File in questo prodotto:
File Dimensione Formato  
Manuscript NPEMIE_Pucci.pdf

solo utenti autorizzati

Descrizione: Bozza finale già formattata
Tipologia: Versione finale editoriale
Licenza: NON PUBBLICO - Accesso privato/ristretto
Dimensione 1.6 MB
Formato Adobe PDF
1.6 MB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/866019
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? 2
social impact