Naslov
Fluorescence Resonance Energy Transfer (FRET) in Self-Assembled Bis(Amino Acid) Naphthalene Gelation Systems

Autori
Makarević, Janja ; Pospišil, Tihomir ; Kokan, Zoran ; Perić, Berislav ; Kirin, Srećko I. ; Frkanec, Leo

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
13th International Symposium on Macrocyclic and Supramolecular Chemistry / Voyer, Normand ; Anslyn, Eric V. ; Sessler, Jonathan L. - Quebec : ISMSC, 2018

Skup
13th International Symposium on Macrocyclic and Supramolecular Chemistry

Mjesto i datum
Quebec, Kanada, 08.07.2018. - 13.07.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Supramolecular gels ; Fluorescence Resonance Energy Transfer (FRET)

Sažetak
Contemporary study in the field of supramolecular gels resulted in the development of recognizable areas in materials chemistry with an emphasis on the self-organizing soft materials.1, 2 They have a great opportunity for specific applications in various fields, such as optoelectronics, light harvesting, organic– inorganic hybrid materials, pharmaceutical, food, and cosmetic industry or in tissue engineering. Among other things, compounds based on -conjugated chromophores are promising candidates for next generation electronic devices.3 Our attention was focused on the synthesis and investigations of the properties of self-assembly, as well as energy transfer in a bis-amide functionalized 2, 6- and 1, 4- naphthalene dicarboxylic acid based organogel. The Gly, Ala and Phe derivatives were synthesized and characterized (Figure 1.). These compounds have shown gelation in various organic solvents with very low critical gelation concentration (<0.1 wt %). Due to the synergistic effect of hydrogen bonding, – stacking and hydrophobic interaction, these gelators showed long-range ordering in a non- polar solvent, as proven by theirs fibrous morphology observed in TEM. Hydrogen bonding in the organogels was further studied by a variable temperature NMR. UV/VIS and photoluminescence studies of the gel indicated also -stacking between the gelator chromophores. It is known that bis-amide functionalized dialkoxynaphthalene derivatives and pyrene form an efficient donor–acceptor pair.4 Herein, we report a photoluminescence property of the bis(Ala)-1, 4-naphthalene amide gel in presence of pyrene and Rhodamine B dye. In both cases was found that the fluorescence from the donor was quenched in this self- assembled system. In turn strong emission was observed from pyrene and rhodamine suggesting a very efficient FRET process possibly due to the incorporation of acceptors (pyrene and rhodamine) in the 3D gel network close to the donor chromophore of bis(Ala)-1, 4-naphthalene amide.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA