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
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......
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......
Photodynamic therapy in oesophageal carcinoma: an overview
Photochemical & Photobiological Sciences - Tập 3 - Trang 839-850 - 2004
Over the last five years, photodynamic therapy has become increasingly regarded as a viable option for palliative treatment of advanced oesophageal carcinoma, alongside more established modalities such as chemotherapy and radiotherapy. A large number of reports on the efficacy of photodynamic therapy as both a palliative and curative treatment for malignancy of the oesophagus have appeared in the ......
Relocalization of cationic porphyrins during photodynamic therapy
Photochemical & Photobiological Sciences - Tập 1 - Trang 837-840 - 2002
When photodynamic therapy is directed against sub-cellular sites that include mitochondria, the anti-apoptotic protein Bcl-2, lysosomes or the endoplasmic reticulum, there is generally an apoptotic response leading to cell death. We previously reported that the targeting of the plasma membrane by photosensitizing agents led to either a marked delay or inhibition of apoptosis, even if other sub-cel......
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