Napredna pretraga

Pregled bibliografske jedinice broj: 445175

Synthesis, spectroscopic characterization and photophysics of new functionalized 2, 3- distyrylfurans : substituent and solvent effects on their photobehavior


Škorić, Irena; Kikaš, Ilijana; Kovács, Margit; Šindler-Kulyk, Marija; Horváth, Ottó
Synthesis, spectroscopic characterization and photophysics of new functionalized 2, 3- distyrylfurans : substituent and solvent effects on their photobehavior // Journal of photochemistry and photobiology. A, Chemistry, 211 (2010), 2/3; 152-161 doi:10.1016/j.jphotochem.2010.02.013 (međunarodna recenzija, članak, znanstveni)


Naslov
Synthesis, spectroscopic characterization and photophysics of new functionalized 2, 3- distyrylfurans : substituent and solvent effects on their photobehavior

Autori
Škorić, Irena ; Kikaš, Ilijana ; Kovács, Margit ; Šindler-Kulyk, Marija ; Horváth, Ottó

Izvornik
Journal of photochemistry and photobiology. A, Chemistry (1010-6030) 211 (2010), 2/3; 152-161

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Distyrylfuran; fluorescence; oxygen heterocycles; photophysics; synthesis; solvent effect

Sažetak
Two new groups of p-chloro-, p-methoxy- and p- nitro-substituted derivatives of the trans, trans- isomers of 2, 3-distyrylfuran have been synthesized by a sequence of reactions according to known methods. These new conjugated heterocyclic compounds along with the parent one and its methyl-derivative have been characterized spectrally, photophysically and photochemically. These compounds, except for the nitro-derivatives, display high fluorescence quantum yields in the non-polar n-hexane (ΦF = 0.76-0.98). In ethanol of high polarity, the lifetime of their singlet excited state increases from 1.31-2.59 ns to 2.01- 4.77 ns, significantly enhancing the quantum yield of their photochemical reaction from 0.02-0.24 to 0.25-0.46, and diminishing their fluorescence efficiency (ΦF = 0.26-0.64). Deviating from the other compounds studied, the quantum yields for both the fluorescence and the photolysis of the nitro-derivatives are rather low (ΦF < 10-4, Φ= 0.025-0.042 in ethanol), probably due to an efficient intersystem crossing leading to a non- reactive triplet state. Accordingly, their singlet-state lifetime is also relatively short (τ< 0.3 ns).

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
125-0982933-2926 - Heteropolicikli, strukturne osnove za bioaktivne spojeve. Sinteza i fotokemija (Irena Škorić, )

Ustanove
Fakultet kemijskog inženjerstva i tehnologije, Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Citati