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Photochemical and Photobiological Sciences
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Solar radiation in the ultraviolet (UV), visible (VIS), and infrared (IR) ranges produces different biological effects in humans. Most of these, particularly those derived from ultraviolet radiation (UVR) are harmful to the skin, and include cutaneous aging and increased risk of cutaneous diseases, particularly skin cancer. Pharmacological photoprotection is mostly topical, but it can also be systemic. Oral photoprotectives constitute a new generation of drugs to combat the deleterious effects o...
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Although cyclodextrins have been extensively utilized in various supramolecular fields due to their numerous attractive attributes, to achieve even advanced applications, they often need structural modification through substitutions of suitable functional groups at their rims. A systematic investigation on how the degree of substitution on the cyclodextrin rims affects the binding affinity for a given guest molecule, is however rarely been reported, especially from the perspective of the photoph...
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Diarylethene derivatives having benzothiophene S,S-dioxide groups undergo turn-on mode fluorescence photoswitching. For the practical application to super-resolution fluorescence microscopy, the photoswitchable fluorescent molecules are desired to be resistant against photodegradation. Here we synthesized turn-on mode fluorescent diarylethenes having electron-withdrawing (trifluoromethyl or nitro) or electron-donating (methyl, methoxy, or dimethylamino) substituents on phenyl rings at 6- and 6’-...
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#1Miryam Chiara Malacarne (University of Insubria)H-Index: 1
#2Stefano Banfi (University of Insubria)H-Index: 23
Last. Enrico Caruso (University of Insubria)H-Index: 13
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Two aza-BODIPY photosensitizers (PSs, compounds 7 and 8), featuring an iodine atom on each pyrrolic unit of their structure, were synthesized in fairly good yields starting from commercial products and tested in vitro on two human cancer cell lines (HCT116 and SKOV3) to assess their photodynamic efficacy. After treating the cell cultures with variable concentrations of 7 or 8 and incubating for the desired incubation time, the cells were irradiated for two hours with a red-light emitting diode (...
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An imidazolium-based quinoline Schiff base ImSB was developed and fully characterized by FT-IR, 1H NMR and 13C NMR spectroscopy, mass spectrometry, and X-ray crystallography. The fluorescence behaviour of ImSB in solutions and solid-state, keto-enol stability at different concentrations and pH in aqueous medium was investigated. The UV-visible and fluorescence studies were performed to find the response of ImSB towards different ions in the aqueous medium. ImSB showed turn-on fluorescence behavi...
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#1Fengshou WuH-Index: 9
#2Haolan Li (WIT: Wuhan Institute of Technology)
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Photodynamic therapy (PDT) has been extensively explored for malignant tissue treatment. In this work, we successfully synthesized and characterized a series of porphyrin compounds by connecting porphyrin units with alkyl chain, which were then coordinated with palladium to yield related metal complexes, named as Pd-Monopor, Pd-Dipor, and Pd-Tripor, respectively. The reactive oxygen species (ROS) generation of six porphyrin compounds was investigated by dichlorofluorescin (DCFH) method. As expec...
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There is widespread acknowledgement of the presence of vitamin D deficiency in the community and the pressing need to address this. From a public health perspective, emphasis has been placed on addressing vitamin D deficiency through dietary means. However, naturally rich food sources of vitamin D are few and infrequently consumed, and nutrition survey data from various countries have indicated that habitual vitamin D intakes in the community are much lower than the current vitamin D dietary gui...
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Photopharmacology offers facile solutions to spatiotemporal control over ligand activity and receptor function. Meta-diamide insecticide acts on insect GABA receptors (GABARs) as an antagonist that causes firing of a neuron. We present here photochromic GABAR ligands azobenzene-meta-diamides (ABMDAs) by incorporating photoswitchable azobenzene with meta-diamides. ABMDAs showed good isomerization efficiency and fatigue resistance. Among them, ABMDA7 shows a 1.5-fold insecticidal activity differen...
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#1Ila (IITG: Indian Institute of Technology Guwahati)
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In aqueous solution, 2-(4-fluorophenylamino)-5-(2,4-dihydroxybenzeno)-1,3,4-thiadiazole (FABT) was found to emit dual emission and the longer wavelength emission was assigned to combination of the aggregation and the conformational change. In number of molecules those possessing intramolecular hydrogen bond between the proton donor and the acceptor, the longer wavelength emission is often observed due to emission from the tautomer formed by excited state intramolecular proton transfer (ESIPT). T...
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#1Udayakumar Dalimba (KREC: National Institute of Technology, Karnataka)H-Index: 9
Last. Ezequiel WolcanH-Index: 11
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A series of trigonal-shaped molecules (TPyT and TPyP) and polymer (P2TPy) with donor–acceptor–donor (D–A–D) structural arrangement was designed with thiophene and 2,4,6-trisubstituted pyridine as the backbone i.e., 4-(4-(decyloxy)phenyl)-2,6-di(thiophen-2-yl)pyridine core structure, for the first time and synthesized via microwave assisted one pot reaction. The extension of conjugation of the system by substituting thiophene acrylonitrile (TPyT) and phenyl acrylonitriles (TPyP and P2TPy) via low...
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