Journal of Photochemistry and Photobiology最新文献_第8页

Recent advances in visible light mediated photoinduced aryl radical generation and its application in synthesis 可见光介导光诱导芳基自由基生成及其在合成中的应用研究进展

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-08-01 DOI: 10.1016/j.jpap.2023.100192

Tubai Ghosh , Sougata Santra , Grigory V. Zyryanov , Brindaban C. Ranu

引用次数: 0

Peptide-bridged bis-porphyrin compounds: A photophysical and molecular dynamics study 肽桥联双卟啉化合物:光物理和分子动力学研究

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-08-01 DOI: 10.1016/j.jpap.2023.100191

Rita Cimino , Emanuela Gatto , Marta De Zotti , Fernando Formaggio , Claudio Toniolo , Micaela Giannetti , Antonio Palleschi , Carlos Serpa , Mariano Venanzi

{"title":"Peptide-bridged bis-porphyrin compounds: A photophysical and molecular dynamics study","authors":"Rita Cimino , Emanuela Gatto , Marta De Zotti , Fernando Formaggio , Claudio Toniolo , Micaela Giannetti , Antonio Palleschi , Carlos Serpa , Mariano Venanzi","doi":"10.1016/j.jpap.2023.100191","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100191","url":null,"abstract":"<div>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, i.e., Cα-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 Cα-methylvaline residues, that inhibited energy relaxation pathways coupled to torsional motions of the peptide chain.</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}

引用次数: 0

Concise review on seaweed photosynthesis: From physiological bases to biotechnological applications 海藻光合作用研究综述:从生理基础到生物技术应用

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-08-01 DOI: 10.1016/j.jpap.2023.100194

Aline P. Martins , Pio Colepicolo , Nair S. Yokoya

引用次数: 0

Photobiomodulation: Cellular, molecular, and clinical aspects 光生物调节:细胞、分子和临床方面

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-07-23 DOI: 10.1016/j.jpap.2023.100197

Márcia Cristina Prado Felician , Renata Belotto , João Paulo Tardivo , Mauricio S. Baptista , Waleska Kerllen Martins

{"title":"Photobiomodulation: Cellular, molecular, and clinical aspects","authors":"Márcia Cristina Prado Felician , Renata Belotto , João Paulo Tardivo , Mauricio S. Baptista , Waleska Kerllen Martins","doi":"10.1016/j.jpap.2023.100197","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100197","url":null,"abstract":"<div>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.</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}

引用次数: 0

Induction of chirality in the charge transfer complex photochemistry 电荷转移络合光化学中手性的诱导

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-07-14 DOI: 10.1016/j.jpap.2023.100200

Tadashi Mori

{"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>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.</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}

引用次数: 0

The inhibitory and inactivating effects of visible light on SARS-CoV-2: A narrative update 可见光对SARS-CoV-2的抑制和灭活作用:叙述更新

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-06-01 DOI: 10.1016/j.jpap.2023.100187

Shelley Gorman

引用次数: 0

Enhanced Fluorescence behavior of Safranine-O by complexing with inorganic clay nanosheets 与无机粘土纳米片络合增强红花碱o的荧光行为

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-06-01 DOI: 10.1016/j.jpap.2023.100182

Masbooth Rasa Melechalil , Kyosuke Arakawa , Yugo Hirade , Fazalurahman Kuttassery , Tetsuya Shimada , Tamao Ishida , Shinsuke Takagi

{"title":"Enhanced Fluorescence behavior of Safranine-O by complexing with inorganic clay nanosheets","authors":"Masbooth Rasa Melechalil , Kyosuke Arakawa , Yugo Hirade , Fazalurahman Kuttassery , Tetsuya Shimada , Tamao Ishida , Shinsuke Takagi","doi":"10.1016/j.jpap.2023.100182","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100182","url":null,"abstract":"<div>Our laboratory has been studying the strong enhancement in the fluorescence quantum yield and an excited lifetime of the organic dye molecules on the clay nanosheets and refer to as “Surface-Fixation Induced Emission”. In this study, Safranine-O which is a mono-cationic phenazine-based dye molecule, was used as the organic dye. It has fluorescence enhancement properties on the clay surface due to the suppression of the non-radiative deactivation rate constant (knr) on the clay nanosheets. While Safranine-O in water in the absence of clay nanosheets exhibited the values as 0.068 and 1.09 × 10−9 s for ϕf and τ, those on the clay surface are 0.121 and 1.96 × 10−9 s. knr values in water and on the clay were calculated to be 8.6 × 108 s − 1 and 4.5 × 108 s − 1, respectively. These results can be explained well by the structure fixing and structure resembling effect. This study helps to explore the possibility of utilizing mono-cationic dye molecules for the realization of desired photo-functional materials and photochemical reactions.</div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"15 ","pages":"Article 100182"},"PeriodicalIF":3.261,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3457202","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}

引用次数: 0

Photoreceptor contributions to the human pupil light reflex 光感受器对人类瞳孔光反射的贡献

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-06-01 DOI: 10.1016/j.jpap.2023.100178

Pablo A. Barrionuevo , Luis A. Issolio , Constanza Tripolone

引用次数: 2

Opsins as main regulators of skin biology 视蛋白是皮肤生物学的主要调节因子

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-06-01 DOI: 10.1016/j.jpap.2023.100186

Ana Maria de Lauro Castrucci , Maurício S. Baptista , Leonardo Vinicius Monteiro de Assis

引用次数: 0

The role of the epidermal physode layer in UV protection of Fucus species 墨角藻表皮植酸层在紫外线防护中的作用

IF 3.261

Journal of Photochemistry and Photobiology Pub Date : 2023-06-01 DOI: 10.1016/j.jpap.2023.100174

Rafael Meichssner , Mira Wilkens , Frauke Pescheck , Wolfgang Bilger

{"title":"The role of the epidermal physode layer in UV protection of Fucus species","authors":"Rafael Meichssner , Mira Wilkens , Frauke Pescheck , Wolfgang Bilger","doi":"10.1016/j.jpap.2023.100174","DOIUrl":"https://doi.org/10.1016/j.jpap.2023.100174","url":null,"abstract":"<div>Phlorotannins are believed to provide UV protection in brown algae. In Fucus species, phlorotannin-rich vesicles (“physodes”) form an “epidermal physode layer”, which might represent the anatomical structure responsible for UV protection. However, this layer has been neglected so far; instead, phlorotannin contents of entire thalli were studied in UV exposure experiments.We employed fluorometric methods to investigate in which wavelength region and to which degree the epidermal physode layer of two Fucus species reduces the transmittance of UV radiation. For comparison, we also studied Saccharina latissima, a brown algal species without epidermal physode layer.We could show that the epidermal physode layer absorbs throughout the entire UV wavelength range and reduces the epidermal UV-B transmittance into the thallus strongly (15% transmitted in F. vesiculosus vs. 80–100% in S. latissima). UV-B transmittances varied with growth depth and the variations correlated with photosystem II (PSII) stress responses upon artificial UV-B illumination. We found that the UV-B protection is more than sufficient for natural UV-B levels and of rather constitutive nature.In conclusion, the epidermal physode layer appears to be the anatomical feature exerting UV protection by phlorotannins in Fucus species and might thus be a core adaptation that enables Fucales the colonization of the intertidal habitat.</div>","PeriodicalId":375,"journal":{"name":"Journal of Photochemistry and Photobiology","volume":"15 ","pages":"Article 100174"},"PeriodicalIF":3.261,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3031864","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}

引用次数: 0