Results 91 to 100 of about 587,022 (279)

Synthesis and Functional Properties of Fluorinated Phosphonate‐Substituted Porphyrins: Excellent Photosensitizers and Robust Precursors for Photoactive Langmuir–Schaefer Films

Chemistry – A European Journal, EarlyView.
This is a comprehensive study of new family of high functionalized meso‐tetraarylporphyrins. A synthetic approach to phosphonate‐substituted fluorinated porphyrins was developed. These compounds were investigated with respect to singlet oxygen generation and photostability.
Azhar Kechiche, Cyrille Monnereau, Chantal Andraud, Alla Bessmertnykh‐Lemeune, Yoann Rousselin, Andrey V. Cheprakov, Elizaveta V. Ermakova, Alexandra I. Zvyagina, Habib Nasri   +8 more
wiley   +1 more source

Double Thionation of 4‐Dimethylaminophthalimide Leads to the Development of a Highly Effective Photosensitizer

Chemistry – A European Journal, EarlyView.
We report on the photophysical properties and electronic relaxation mechanisms of 4‐dimethylaminophthalimide (DMAP) and thio‐4‐dimethylaminophthalimide (SDMAP). While DMAP is fluorescent, SDMAP shows negligible fluorescence due to ultrafast intersystem crossing to a long‐lived triplet state that decays in 3.4 ± 0.05 µs.
Chris Acquah, Eric Lee, Sourav Kanti Seth, Reshma Mathew, Rubej R. Khan, Steffen Jockusch, Shudan Yang, Han Xiao, Carlos E. Crespo‐Hernández   +8 more
wiley   +1 more source

Water-Solubilization of P(V) and Sb(V) Porphyrins and Their Photobiological Application

International Journal of Photoenergy, 2015
Porphyrins have been widely utilized as biochemical and biological functional chromophores which can operate under visible-light irradiation. Water-soluble porphyrins have been used as the drug for photodynamic therapy (PDT) and photodynamic inactivation
Jin Matsumoto, Tsutomu Shiragami, Kazutaka Hirakawa, Masahide Yasuda   +3 more
doaj   +1 more source

Synthesis and Optical Properties of Diboron Complexes of 1,4‐Anthraquinone Derivatives

Chemistry – A European Journal, EarlyView.
1,4‐Diboron complexes exhibit near‐infrared fluorescence, in contrast to non‐emissive 1,5‐diboron analogues. Fluorescence quantum yields decrease with increasing electron‐donating substituents, attributed to enhanced nonradiative decay via intramolecular PeT.
Yasuhiro Kubota, Ayumi Ogasawara, Ayato Hakamada, Naoya Suzuki, Masayasu Taki, Shota Mizuno, Toshiyasu Inuzuka, Kazumasa Funabiki, Chie Yamada‐Kubota, Miho Kuwahara, Tetsuya Hara   +10 more
wiley   +1 more source

Ultrasonic chamber combined with photodynamic therapy inhibits bacterial growth on dental devices

Photodiagnosis and Photodynamic Therapy
Background: Photodynamic therapy is a two-stage treatment that combines light energy with a photosensitizer, and enhances the treatment against bacterial infections.
Jeter Bochnia Ribeiro, Augusto Alberto Foggiato, Douglas Silva Fernandes, João Victor Frazão Câmara, Amanda de Oliveira Pinto Ribeiro, Fabiana Mantovani Gomes França   +5 more
doaj   +1 more source

Photosensitizing Au(I) Catalysis With Coumarins

Chemistry – A European Journal, EarlyView.
A Au(I) complex with a tethered coumarin fragment was synthesized and characterized by UV‐vis and emission spectroscopy. Its ability to facilitate photo‐driven cross‐coupling reactions through single‐electron and energy transfer events was evaluated. ABSTRACT Gold catalysis shows versatility in a wide range of challenging transformations, wherein light‐
Liliana Capulín Flores, Jacob J. van der Wal, Johannes E. M. N. Klein   +2 more
wiley   +1 more source

Single‐Step Synthesis of Dithieno[3,2‐b:2′,3′‐e]Pyridines and Their Acid‐Dependent Optical and Photosensitising Properties

Chemistry – A European Journal, EarlyView.
The synthesis of dithieno[3,2‐b:2′,3′‐e]pyridines (DTPs) is herein reported, and their optical properties are studied both experimentally and computationally. Protonation or methylation of the nitrogen atom induced bathochromic shifts in their absorption and emission spectra.
Dominic Taylor, Matthew Wallace, Leonardo Amicosante, Gary S. Nichol, Scott J. Dalgarno, Filipe Vilela, Iain A. Wright, Neil B. McKeown   +7 more
wiley   +1 more source

Emerging trends in the application of riboflavin-mediated photodynamic inactivation for food preservation

Trends in Food Science & Technology, 2023
Jiafan Qiu, Huanqi Yang, Yujia Zhang, Ying Xiao, Ling Wang, Ye Peng, Xi Yu, Xiaoyu Huang, Tian Zhong   +8 more
semanticscholar   +1 more source

Control of Gemcitabine Activity With Blue and Red Light

Chemistry – A European Journal, EarlyView.
Treating cancer with chemotherapy is generally associated with many side effects, which can be addressed by selectively releasing the desired drugs with visible light. Sixteen new blue light‐activatable cytostatics were introduced, with the gemcitabine derivative exhibiting ideal properties.
Nils F. Kersten, Konstantin L. Stock, Marius Hyprath, Hannah Weisser, Timo Weinrich, Dieter Steinhilber, Alexander Heckel   +6 more
wiley   +1 more source

Cationic Bacteriochlorin in the photodynamic inactivation of microorganisms

Brazilian Journal of Microbiology
Bacteriochlorophyll extracted from groups of purple non-sulfur bacteria, structurally modified, produces the photosensitizer bacteriochlorin, used in photodynamic therapy (PDT). Photosensitizers (PS) irradiated with light of a specific wavelength provides the generation of reactive oxygen species through the excitation of molecular oxygen, leading to ...
Juliana Kafka Bilha, Priscila Romero Mazzini Pereira, Laura Beatriz dos Santos Costa, Andres Camilo Acosta Acevedo, Clovis Wesley Oliveira de Souza, Michel Rodrigo Zambrano Passarini, Marciana Pierina Uliana   +6 more
openaire   +2 more sources