ArticleJournal of fluorescence2025
Synthesis, Trans-Cis Photoisomerization, Fluorescence Decay Studies of Methoxy Ester Functionalized Alkoxy Side Chain Azobenzene Compounds and Their Photoluminescence Dynamics.
Article in Journal of fluorescence, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- Temperature-Dependent Rotational Dynamics of a Polar Probe in Non-Polar Aprotic Solvents: Interplay of Solvent Viscosity and Size Effect.Journal of fluorescence · 2025Article
- Influence of Viscosity and Temperature on Rotational Dynamics of 3-(1H-benzo[d]Imidazol-2-yl)-7-(Diethyl Amino)-2H-chromen-2-one (Polar Laser dye) in Highly Viscous Solvent: Low and High Viscous Range.Journal of fluorescence · 2025Article
- Temperature-dependent Rotational Dynamics of a 3-(benzo[d]Thiazol-2-yl)-7-diethylamino)-2 H-chromen-2-one non-polar Probe in n-pentanol, n-nonanol, and n-decanol Solvents.Journal of fluorescence · 2025Article
- Influence of Temperature on Rotational Dynamics of 3B7D2HC-2-one Molecule in Non-polar, Polar, and Polar Aprotic Solvents.Journal of fluorescence · 2025Article
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8 authors.
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Abstract
In this study, a series of new methoxy ester functionalized core fluorinated, chloro-fluorinated azobenzene derivatives were synthesized. The molecular structures of the azobenzene derivatives (3a-3c and 4a-4c) were confirmed through various analytical methods, with variations in the alkoxy chain length on one end of the aromatic ring. Optical absorption studies of 3a, 3b revealed π-π* transitions around 368-392 nm. Further, polarizing optical microscope (POM) studies of 3a, 3b revealed birefringent textures, and their phase transitions were investigated using differential scanning colorimetry (DSC) studies. The trans-to-cis photoisomerization of 3a, 3b transpired over 3600s whereas, thermal back relaxation (cis-to-trans) isomerization took 0.75 h. Room temperature photoluminescence (RTPL) studies of 3a-3c and 4a-4c unveiled weak emission intensity peak at ~ 450 nm (blue region) when excited at 400 nm. Steady-state photoluminescence (SSPL) studies of 3a-3c, 4a-4c revealed a broad emission band in the violet region of the visible spectrum with significantly large Stokes shifts, indicating the presence of highly energized excited states and formation of additional energy levels during photoexcitation. Fluorescence decay (FLD) studies of 3a-3c, 4a-4c unveiled average lifetime (τ) dwells between 8.2 ps and 70.4 ps. The average lifetime (τ) was found to increase with the increase in the length of the alkoxy chain. Phosphorescence decay (PD) profiles of 3a-3c, 4a-4c showed average lifetime (τ) fluctuate around 373 ns to 463 ns. The obtained core fluorinated, chloro-fluorinated azobenzene derivatives having different lengths of the alkoxy side chain can find potential applications in optical storage and display technologies.
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