A novel class of xanthene dyes with chemically linked UV absorber molecule and their photophysical properties
[Display omitted] •Chemically linked UV absorber with xanthene XU 2 &XU 3 were synthesized, and photophysical properties were investigated.•Irradiation and lightfastness stability studies were investigated for XU 2 &XU 3 is approximately 50% better than commercial dye 1.•The UV absorber has...
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Veröffentlicht in: | Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Molecular and biomolecular spectroscopy, 2022-10, Vol.279, p.121437, Article 121437 |
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Sprache: | eng |
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•Chemically linked UV absorber with xanthene XU 2 &XU 3 were synthesized, and photophysical properties were investigated.•Irradiation and lightfastness stability studies were investigated for XU 2 &XU 3 is approximately 50% better than commercial dye 1.•The UV absorber has acted as a shield to protect the molecular when exposing UV light.•UV absorber cyclic mechanism of Excited-State Intramolecular Proton Transfer (ESIPT) was discussed.
In this paper, we prepared a new class of chemically linked UV absorber XU2 &XU3, and their photophysical, chemical properties and substrate durability were investigated. Spectroscopic behavior at various solvent and pH levels for this dye solution has been evaluated. Successfully designed an open ring form of xanthene moiety, linked a UV absorber to it, and made XU2 &XU3 that have shown good absorbance and emission band maxima at all solvents and pH mediums. Further, the found UV–Vis absorbance band maxima (λmax), PL emission maxima (λem), molar extinction coefficient (εmax) and Stokes shifts (ΔνST) when compared to commercially available dye 1. The synthesised XU2 &XU3 have shown brilliant results from exposed UV light at irradiation processing time, due to the light energy passes through the molecule by keto-enol tautomerisation between phenolic hydrogen and carbonyl carbon like a six-member ring. So it can be acted as radioless behaviour in the visible region, and it can relax the energy without any assistance. Hence, the UV absorber has protected the compound like a UV Resistance. |
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ISSN: | 1386-1425 1873-3557 |
DOI: | 10.1016/j.saa.2022.121437 |