Journal of Photochemistry and Photobiology最新文献

{"title":"Direct arylation reaction of heteroarenes mediated by photoinduced electron transfer","authors":"Eiji Yamaguchi,&nbsp;Oe Karin,&nbsp;Akichika Itoh","doi":"10.1016/j.jpap.2023.100183","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100183","url":null,"abstract":"<div><p>Electron donor–acceptor (EDA) complexes are interesting chemical species that function as molecular complexes. In this context, chemists have actively studies the use of halogen bonding as a noncovalent interaction in photochemistry. This study focused on developing a direct arylation reaction using aryl radicals generated by photoinduced electron transfer (PET) through halogen-bonding interactions. The study also involves optimizing reaction conditions for a photo induced direct arylation reaction using phenols as halogen bonding acceptor and plausible reaction mechanism. Our results demonstrated that this method provides a facile and efficient approach for synthesizing complex biaryls containing heteroarens using readily available heteroarenes.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100183"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3272685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling the influence of nighttime light on melatonin suppression in humans: Milestones and perspectives","authors":"Lucia Helena Souza de Toledo ,&nbsp;Maria Nathália Moraes ,&nbsp;Maristela de Oliveira Poletini ,&nbsp;José Cipolla Neto ,&nbsp;Jerome Baron ,&nbsp;Theo Mota","doi":"10.1016/j.jpap.2023.100199","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100199","url":null,"abstract":"<div><p>This review presents the main metrics developed so far to correlate physical properties of light and its effects on melatonin suppression. Melatonin is a hormone secreted at night and its production is suppressed by exposure to light. In this context, the negative effects of lighting at night and high exposure to light raise the need for a better quantification of these impacts on health. Different light action spectroscopy methodologies have been recently used to characterize the circadian response mediated by melatonin in humans, but there is so far no consensus on a main validated model. While complementary studies are still necessary to reach such an ideal model, here we analyze and compare the results of works that developed and tested metrics based on the absorption curves of human melanopsin, rods and cones, and on the dynamics of melatonin suppression in different light regimes. These studies reveal how the spectral composition, irradiance and temporality of light modulate the function of human melatonin. We present milestones in this research field, together with discussion on the advances, limitations and perspectives of application for distinct available models. Applied to different contexts, this knowledge can bring favorable changes to health in environmental lighting projects, production of ophthalmic lenses, screens, filters, films, and other optical devices.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100199"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3457199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron and hydrogen atom donor photocatalysts in situ generated from benzimidazolium salts and hydride reagents","authors":"Ryo Miyajima ,&nbsp;Takehiro Kiuchi ,&nbsp;Yuki Ooe ,&nbsp;Hajime Iwamoto ,&nbsp;Shin-ya Takizawa ,&nbsp;Eietsu Hasegawa","doi":"10.1016/j.jpap.2023.100195","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100195","url":null,"abstract":"<div><p>Photocatalytic systems consisting of 2-substituted benzimidazoliums (BI⁺–R, R = polycyclic aryl, triarylamine or phenyl-sulfate) and stoichiometric hydride donor reagents were developed. Light emitting diode irradiation of these photocatalysts in the presence of NaBH₄ or picoline borane promotes desulfonylation reactions of an <em>N</em>-sulfonyl indole, <em>N</em>-sulfonyl amide and α-sulfonyl ketone. Absorption spectroscopic and redox potential measurements as well as density functional theory calculations were carried out to gain mechanistic information. Benzimidazolines (BIH–R), generated in situ by hydride reduction of BI⁺–R, serve as both an electron and hydrogen atom donor photocatalysts in these reductive desulfonylation reactions, which contrasts to ordinary reducing photocatalysts that simply donate electrons.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100195"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2820808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An evidence of electron donor behavior of single-walled carbon nanotube in photo-induced electron transfer","authors":"Koji Inada,&nbsp;Yasuyuki Araki,&nbsp;Atula S.D. Sandanayaka ,&nbsp;Osamu Ito","doi":"10.1016/j.jpap.2023.100193","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100193","url":null,"abstract":"<div><p>The electron transfer reaction between C₆₀ and SWCNTs in D₂O was investigated. Repeated laser irradiation of water-soluble C₆₀ encapsulated in γ-cyclodextrin and SWCNTs with carboxymethylcellulose dispersed in D₂O resulted in the accumulation of C₆₀ anion radicals and a decrease in the E₁₁ absorption band of SWCNTs, strongly suggesting electron transfer between C₆₀ and SWCNTs. Transient absorption techniques revealed that this electron transfer occurred through the excited triplet of C₆₀.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100193"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3143882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Social isolation increases metabolic rate in the transition of light- to dark- phase and advances Rev-erb-α expression in brown adipose tissue to regulate daily rhythm of core body temperature in mice","authors":"Paola Fernandes ,&nbsp;Hellen Nunes ,&nbsp;Tamires Amorim Marinho ,&nbsp;Pietra Souza Barsanele ,&nbsp;Maria Nathália Moraes ,&nbsp;Maristela de Oliveira Poletini","doi":"10.1016/j.jpap.2023.100198","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100198","url":null,"abstract":"<div><p>Mammals use social thermoregulation to maintain the core body temperature (Tc) at a lower energy cost. Brown adipose tissue (BAT) plays a crucial role in thermoregulation. This study tested the hypothesis that social isolation induces alterations in thermogenesis and metabolism to maintain the rhythm of Tc throughout the day. Adult male mice (C57BLJ/6) were maintained in groups of 4–5 (group-housed) or isolated (single-housed) for 28 days. Telemetric probes recorded spontaneous locomotor activity (SLA) and Tc to analyze SLA and Tc daily rhythms. Body weight was measured weekly. VO2 consumption was analyzed at zeitgeber time (ZT) 1–3 (beginning of light phase) or ZT10–14 (beginning of dark phase). The expression of thermogenic-related and clock genes in the BAT occurred at ZT2, ZT8, ZT14, and ZT20. The β3 adrenergic agonist CL-316,243 was i.p. injected in the group- or single-housed mice. Social isolation increased the amplitude of Tc rhythm but decreased the amplitude of SLA oscillation. Nevertheless, in single-housed mice, the circadian peak of Tc and SLA was unaltered, with reduced body weight gain, increased VO2 consumption, and BAT <em>Ucp1</em> expression at ZT14. Isolation advanced the BAT <em>Rev-erb-ɑ</em> peak of expression and phased-shift the peak of expression in BAT <em>Bmal1</em>, while it abolished the daily BAT <em>Per2</em> oscillation. Isolation also abolished the BAT <em>Ucp1</em> and hormone-sensitive lipase (<em>Hsl</em>) expression induced by stimulation of the β3ADR, but it increased <em>Rev-erb-ɑ</em> and <em>Pgc1α</em>. Thus, alterations in <em>Ucp1, Reverb-α, Bmal1,</em> and <em>Per2</em> daily expression may favor an increased metabolic rate at the beginning of the dark, which, in turn, contributes to maintaining the daily Tc rhythm at the expense of reduced body weight gain in isolated mice. In addition, at least at the transcription level, the response of BAT from isolated mice to adrenergic agonist seems to be via a non-canonical mechanism involving <em>Rev-erb-α</em> and <em>Pgc1α</em>.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100198"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3402508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advances in visible light mediated photoinduced aryl radical generation and its application in synthesis","authors":"Tubai Ghosh ,&nbsp;Sougata Santra ,&nbsp;Grigory V. Zyryanov ,&nbsp;Brindaban C. Ranu","doi":"10.1016/j.jpap.2023.100192","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100192","url":null,"abstract":"<div><p>The reactions involving aryl radicals is an efficient strategy for the synthesis of a wide variety of important molecules. We have highlighted here recent developments on the generation of aryl radicals from various substrates by visible light mediated photocatalysis and their reactions with different substrates to produce a library of arylated and het-arylated compounds. These reactions are performed at room temperature using LED bulbs. Thus, this strategy is green involving less energy.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100192"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3143881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Peptide-bridged bis-porphyrin compounds: A photophysical and molecular dynamics study","authors":"Rita Cimino ,&nbsp;Emanuela Gatto ,&nbsp;Marta De Zotti ,&nbsp;Fernando Formaggio ,&nbsp;Claudio Toniolo ,&nbsp;Micaela Giannetti ,&nbsp;Antonio Palleschi ,&nbsp;Carlos Serpa ,&nbsp;Mariano Venanzi","doi":"10.1016/j.jpap.2023.100191","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100191","url":null,"abstract":"<div><p>Covalently linked peptide-porphyrin compounds are most suitable systems for fundamental studies aiming to the comprehension of the mechanisms driving photoinduced energy/electron transfer processes. Mimicking photosynthetic units, the porphyrin groups act as antenna moieties while the peptide chain is the active medium through which energy and/or electron funneling occur. In this contribution we studied the transfer of excitation between two identical tetraphenylporphyrin groups connected by short peptide chains of different length formed by non-coded conformationally constrained α-amino acids, <em>i.e.</em>, C^α-methylvaline. The photophysical events following porphyrin photoexcitation were characterized from the microsecond to the picosecond time region by time-resolved spectroscopy techniques. Ultrafast transient absorption measurements revealed the presence of a transient species that we assign to a self-trapped exciton migrating through the peptide chain. The exciton species propagates the electronic coupling between the two porphyrin groups giving rise to a characteristic bisignate band measured by circular dichroism experiments. Molecular dynamics simulations strongly suggest that the long lifetime (hundreds of picoseconds) of the exciton species is determined by the rigidity of the C^α-methylvaline residues, that inhibited energy relaxation pathways coupled to torsional motions of the peptide chain.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100191"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2820807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Concise review on seaweed photosynthesis: From physiological bases to biotechnological applications","authors":"Aline P. Martins ,&nbsp;Pio Colepicolo ,&nbsp;Nair S. Yokoya","doi":"10.1016/j.jpap.2023.100194","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100194","url":null,"abstract":"<div><p>Seaweeds play an important role for the environment, since they are photosynthetic organisms, contributing to the cycling of nutrients and to the protection and feeding of several animals. The potential for biotechnological applications of marine macroalgae biomass is enormous, and to attend the demand of the current market, the knowledge of the physiological characteristics of these organisms is essential to ensure a high productivity in cultivation systems. In this review, we contribute to the knowledge about the photosynthetic characteristics of seaweeds, describing relevant aspects of marine macroalgae and photosynthesis, and the biotechnological use of these organisms.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"16 ","pages":"Article 100194"},"PeriodicalIF":3.261,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3035045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photobiomodulation: Cellular, molecular, and clinical aspects","authors":"Márcia Cristina Prado Felician ,&nbsp;Renata Belotto ,&nbsp;João Paulo Tardivo ,&nbsp;Mauricio S. Baptista ,&nbsp;Waleska Kerllen Martins","doi":"10.1016/j.jpap.2023.100197","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100197","url":null,"abstract":"<div><p>Photobiomodulation (PBM) is a noninvasive photonic-based therapy, capable of dealing with immune-inflammatory, neurological, and musculoskeletal disorders, as well as healing oral and chronic skin wounds. During PBM light is applied at a specific wavelength, either in the visible or near-infrared (NIR) ranges. Photophysical and photochemical processes might stimulate or inhibit various biological processes, depending on the target tissue, the wavelength of light, irradiance, fluence, repetition rate (pulse frequency), spot size, optical data of the tissue to be irradiated and treatment regimen. There are several randomized clinical studies demonstrating the PBM benefits as main or adjuvant therapies. Of importance to this review, there is a large piece of evidence in the management of skin or venous ulcers, and diabetic foot. In this review, the PBM´s efficacy as adjuvant therapy to deal with chronic human ulcers were discussed concerning the photophysical parameters and clinical aspects. Beside, we overview the state-of-the-art regarding the cellular and molecular modulatory mechanisms photoactivated by red and NIR light.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"17 ","pages":"Article 100197"},"PeriodicalIF":3.261,"publicationDate":"2023-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"2250137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Induction of chirality in the charge transfer complex photochemistry","authors":"Tadashi Mori","doi":"10.1016/j.jpap.2023.100200","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100200","url":null,"abstract":"<div><p>Electron donor and acceptor undergo association in solution to form a weak molecular complex, namely a charge transfer complex. The formation of the complex is apparent by its new low-energy absorption band. Upon photoexcitation of this charge transfer band, an intracomplex electron transfer is facilitated to form a contact ion radical pair. The theoretical basis for the complex formation and the subsequent photoinduced electron transfer process has been well established already half a century ago. Nevertheless, the charge transfer complex photochemistry is now in a renaissance, due to its synthetic utility of its radical ion pair. By intentionally sidestepped unproductive back electron transfer process, a desired product is effectively obtained with or without external reagent and/or catalyst. In addition, the photoexcitation of the complex does not require any additional photocatalyst and often conceivable with the visible light. Accordingly, various donor/acceptor pairs and synthetic applications have been emerged as novel photoreaction systems in the last two decades. Some have also addressed the stereoselective transformations. This mini review highlights the recent progress of the asymmetric photoreaction, in particular in synthetic applications, based on the photoexcitation of the charge transfer complex, in comparison with photoredox catalysis.</p></div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"17 ","pages":"Article 100200"},"PeriodicalIF":3.261,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3462754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}