Photochemical & Photobiological Sciences
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Investigation of the photoisomerisation process in four p-benzoxazoyl-substituted stilbenes
Photochemical & Photobiological Sciences - Tập 9 - Trang 357-364 - 2010
Fluorescence properties and trans-cisphotoisomerisation of the benzoxazole derivatives 2-[4-(E)-(styryl)phenyl]benzoxazole (I), 2-{4-[(E)-2-(4-methoxyphenyl)vinyl]phenyl}benzoxazole (II), {4-[(E)-2-(4-benzoxazol-2-yl-phenyl)vinyl]phenyl}dimethylamine (III) and {4-[(E)-2-(4-benzoxazol-2-yl-phenyl)vinyl]phenyl}diphenylamine (IV) have been investigated in solvents of different polarities. It was foun......
ER stress, autophagy and immunogenic cell death in photodynamic therapy-induced anti-cancer immune responses
Photochemical & Photobiological Sciences - Tập 13 - Trang 474-487 - 2014
Tumours are a form of pseudo-organs with their own microenvironment where the cancer cells nurture a dysfunctional immune environment incapable of inciting anti-tumour immunity. It had been proposed that the only way to counteract such an immune system dysfunction in tumours is by eliciting, therapeutically, a cancer cell death pathway that is accompanied by high immunogenicity and possibly inhibi......
Mesogenic BODIPYs: an investigation of the correlation between liquid crystalline behaviour and fluorescence intensity
Photochemical & Photobiological Sciences - Tập 10 - Trang 992-999 - 2020
A series of mesogenic molecules based on the 4,4′-difluoro-3a,4a-diaza-s-indacene (BODIPY) fluorophore have been synthesised and characterised. Each compound consists of one mesogenic unit, based on a cyanobiphenyl core, and one fluorophore, of varying alkyl substitution. The compounds were prepared by microwave-assisted palladium-catalyzed couplings (Suzuki and Sonogashira) due to slow reaction r......
Kinetics of photochemical reactions of biphotochromic compounds based on spironaphthopyran and enamine — conjugation effect
Photochemical & Photobiological Sciences - Tập 15 Số 3 - Trang 382-388 - 2016
Photodimerisation of enones in a clay microenvironment
Photochemical & Photobiological Sciences - Tập 1 - Trang 991-995 - 2012
The photodimerisation of 2-cyclohexenone, 2-cyclopentenone and their 3-methyl derivatives is studied in the confined environment of clay interlayers. In the photolysis of 2-cyclohexenone, a remarkable regioselectivity is observed in favour of the head-to-head dimer when carried out in cation-exchanged bentonite clays while the dimerisation of 2-cyclopentenone favours the formation of the head-to-t......
Sulfonamide functionalized silica nano-composite: characterization and fluorescence “turn-on” detection of Fe3+ ions in aqueous samples
Photochemical & Photobiological Sciences - Tập 22 - Trang 1919-1931 - 2023
We have synthesized novel sulfonamide-based nano-composite (SAN) for selective and sensitive detection of Fe3+ ions in aqueous samples. Morphological characterization of SAN was carried out with TGA, FT-IR, UV–Vis, ninhydrin assay, FE-SEM, pXRD, BET, EDX, and elemental analysis. The sensing nature, effect of pH, sensor concentration and response time analysis were accomplished with the help of emi......
A mechanism study on the photocatalytic inactivation of Salmonella typhimurium bacteria by CuxO loaded rhodium–antimony co-doped TiO2 nanorods
Photochemical & Photobiological Sciences - Tập 18 - Trang 1092-1100 - 2020
This study presents the first report on the photocatalytic inactivation mechanism for a Salmonella typhimurium pathogen by visible-light active CuxO loaded rhodium–antimony co-doped TiO2 nanorods (CuxO/Rh–Sb–TiO2 NRs) under visible light irradiation (cutoff filter, λ ≥ 420 nm). Remarkably higher pathogenic inactivation of 4 log within 40 min by a CuxO supported Rh–Sb–TiO2 NR photocatalyst was obse......
Photophysical properties of a photocytotoxic fluorinated chlorin conjugated to four β-cyclodextrins
Photochemical & Photobiological Sciences - Tập 7 - Trang 834-843 - 2008
A meso-tetrakis(pentafluorophenyl)-chlorin with the reduced pyrrole ring linked to an isoxazolidine ring (FC) has been conjugated to four β-cyclodextrins (CDFC). The CDFC exhibits excellent water solubility and is a potent photosensitizer towards proliferating NCTC 2544 human keratinocytes. The study by conventional steady state absorption and fluorescence spectroscopies and by time-resolved femto......
A novel molecular conjugate for the simultaneous DNA oxidation and targeted delivery of nitric oxide triggered by light
Photochemical & Photobiological Sciences - Tập 8 - Trang 1534-1538 - 2009
We have designed and synthesized a novel photoactivable molecular conjugate integrating three basic components in its molecular skeleton: a DNA intercalator, a viologen moiety and a nitric oxide (NO) photodonor. This compound is soluble in aqueous solution and binds to double strand DNA with an association constant of 1.1×104 M−1. The fluorescence of the intercalator unit is strongly quenched due ......
3-Aminoperylene and ascorbate in aqueous SDS, one green laser flash … and action! Sustainably detoxifying a recalcitrant chloro-organic
Photochemical & Photobiological Sciences - Tập 16 - Trang 1613-1622 - 2020
The hydrated electron represents a “super-reductant” in water, providing 2.9 eV of reductive power, which suffices to decompose nonactivated aliphatic halides. We show that 3-amino-perylene in SDS micelles, when combined with the bioavailable ascorbate as an extramicellar sacrificial donor, sustainably produces hydrated electrons through photoredox catalysis with green light, from a metal-free sys......
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