Results 201 to 210 of about 158,830 (405)

The Photolysis of Diazoacetylchymotrypsin

open access: yesJournal of Biological Chemistry, 1962
Ajaib Singh   +2 more
openaire   +3 more sources

Photoinduced Hydrogen Evolution Catalyzed by Co(II) Complexes of N5‐Donor Ligands

open access: yesChemistry – A European Journal, EarlyView.
Cobalt(II) complexes of three related pentadentate ligands have been investigated as photoelectrochemical catalysts for proton reduction/hydrogen gas evolution in the presence of ruthenium, iridium, or copper‐based photosensitizers. Potential mechanisms for hydrogen evolution have been investigated by time‐resolved transient absorption spectroscopy and
Chuanshuai Li   +14 more
wiley   +1 more source

Photocatalytic Hydrophosphination Using Calcium Precatalysts

open access: yesChemistry – A European Journal, EarlyView.
Calcium compounds are competent photocatalysts for hydrophosphination. Returning to the compounds reported by Barrett and Hill, visible light irradiation at ambient temperature activates simple calcium derivatives comparable to thermal catalysis. Ancillary ligands are key to radical versus nonradical reactivity under these conditions.
Moniruzzaman Moniruzzaman   +2 more
wiley   +1 more source

Optimization of Steroid Photochemistry and Its Application in the Synthesis of 5,6‐Dihydro‐Ophiopogonol A

open access: yesChemistry – A European Journal, EarlyView.
Steroid photoreactivity was a major topic in the last century. This study revisits it by exploring the photochemistry of Δ1‐keto‐steroids, offering an efficient method to modify the classic steroid 6/6/6/5 ring system. This approach enables the transformation of accessible steroids into rare ones, demonstrated by synthesizing 5,6‐dihydro‐ophiopogonol A
Chiara Maioli   +8 more
wiley   +1 more source

UV photolysis of 4-iodo-, 4-bromo-, and 4-chlorophenol::Competition between C-Y (Y = halogen) and O-H bond fission [PDF]

open access: yes, 2013
Ashfold, Michael N. R.   +5 more
core   +1 more source

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