Results 141 to 150 of about 72,880 (337)

Nanotechnology in photodynamic therapy

open access: yesOral Oncology Reports
Photodynamic therapy (PDT) is a minimally invasive treatment that employs a photosensitizer to destroy cancer cells. Its efficiency is determined by the activation light features, which include the photosensitizer molecule, light wavelength, tumour ...
Shrikant B. Mali   +2 more
doaj  

Synergistic Visible Light Nanophotocatalysis and Asymmetric Organocatalysis for the Stereoselective α‐Alkylation of Aldehydes

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
An unprecedent dual catalytic nanophotocatalytic and asymmetric organocatalytic system for the α‐functionalization of aldehydes is developed using carbon nanodots as photosensitizers. The optimized methodology yields the alkylated products with up to 94% yield and up to 98:2 e.r., evidencing the possible recycling of the nanocatalysts.
Antonio Di Sabato   +9 more
wiley   +1 more source

Photocatalytic Polyene Cyclization to Cyclopentyl Thioethers with Consecutive Quaternary Centers in Fluorinated Alcohols

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
A photocatalytic strategy enables efficient cyclization of polyenes to cyclopentyl thioethers with consecutive all‐carbon quaternary centers. Using 2,4,6‐triphenylpyrylium tetrafluoroborate in 1,1,1,3,3,3‐hexafluoroisopropanol, the method proceeds via a thiyl radical mechanism, offering high yields and good diastereoselectivities.
Nicolás Rascón   +2 more
wiley   +1 more source

Photosensitivity and lymphoma [PDF]

open access: yesPostgraduate Medical Journal, 1997
J. A. Copplestone   +4 more
openaire   +2 more sources

Harnessing Vinylogy with Radicals: Photoinduced γ‐Benzylation Reactions of 2‐Silyloxyfurans

open access: yesAdvanced Synthesis &Catalysis, EarlyView.
Two radical‐mediated benzylations of 2‐silyloxyfurans, promoted by visible light and suitable photoredox catalysts have been disclosed. A broad scope of γ‐benzyl butenolides was obtained in one step, some of which were used as strategic precursors to bio‐valuable chiral butanolides.
Enrico Marcantonio   +12 more
wiley   +1 more source

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