Results 21 to 30 of about 57,845 (293)

Diphenylcarbene Protected by Four ortho-Iodine Groups: An Unusually Persistent Triplet Carbene

open access: yesMolecules, 2016
Diphenyldiazomethane with four iodine groups at the ortho positions and two tert-butyl groups at the para positions, i.e., bis(4-tert-butyl-2,6-diiodophenyl)diazomethane (1a-N2), was synthesized as a sterically hindered triplet carbene precursor ...
Katsuyuki Hirai   +3 more
doaj   +1 more source

Study on the Direct and Indirect Photolysis of Antibacterial Florfenicol in Water Using DFT/TDDFT Method and Comparison of Its Reactivity with Hydroxyl Radical under the Effect of Metal Ions

open access: yesToxics
Florfenicol (FLO) is a widely used antibacterial drug, which is often detected in the environment. In this paper, the photolysis mechanism of FLO in water was investigated using density functional theory (DFT) and time-dependent density functional theory
Yue Kang, Ying Lu, Se Wang
doaj   +1 more source

Heavy‐Atom Tunneling at Room Temperature Revealed by Instanton Theory

open access: yesAngewandte Chemie, EarlyView.
Usually, tunneling does not play a significant role in chemical reactions except at low temperature, especially when heavy atoms are involved. However, using nonadiabatic instanton theory we find that heavy‐atom tunneling dominates the reaction mechanism for spin‐forbidden processes in the synthesis of strained organic molecules even at room ...
Debaarjun Mukherjee   +2 more
wiley   +2 more sources

Photodegradation of Methylene Blue Solution via Au Doped TiO2 Nanocomposite Catalysts Prepared Using Novel Photolysis Method [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2019
Gold doped TiO2 has been successfully synthesized via the photolysis method and is characterized by different techniques. NPs of gold doped TiO2 were utilized for the degradation of methylene blue as a material pigmentation pollutant. The substitution of
Zaid Hamid Mahmoud
doaj  

Nucleophilic Trapping Nitrilimine Generated by Photolysis of Diaryltetrazole in Aqueous Phase

open access: yesMolecules, 2013
Nitrilimine generated by photolysis of diaryltetrazole in aqueous phase under mild conditions was trapped by nucleophiles including amines and thioalcohols.
Yixin Zhang, Wujun Liu, Zongbao K. Zhao
doaj   +1 more source

Photolysis of the Insensitive Explosive 1,3,5-Triamino-2,4,6-trinitrobenzene (TATB)

open access: yesMolecules, 2021
The explosive 1,3,5-triamino-2,4,6-trinitrobenzene (TATB) is of particular interest due to its extreme insensitivity to impact, shock and heat, while providing a good detonation velocity.
Annamaria Halasz   +2 more
doaj   +1 more source

Photochemical Oxygen‐Atom‐Transfer Reactivity of Platinum(II) Peroxycarbonates

open access: yesAngewandte Chemie, EarlyView.
The coordination chemistry of metal–peroxycarbonate complexes (M(CO4)) remains poorly understood, with no reported studies of the photochemical reactivity of M(CO4) complexes. The platinum(II) peroxycarbonate complexes Pt(PPh3)2(CO4) and Pt(dppe)(CO4) (dppe = 1,2‐bis(diphenylphosphino)ethane) have been structurally characterized and are shown to ...
Meghan G. Sullivan   +4 more
wiley   +2 more sources

Efeitos de agentes oxidantes e oxigênio dissolvido na descoloração do azo corante acid orange 7 por fotólise e fotocatálise Effects of oxidant agents and dissolved oxygen on the decolorization of acid orange 7 azo dye by photolysis and photocatalysis

open access: yesQuímica Nova, 2009
The decolorization of acid orange 7 azo dye by photolysis and photocatalysis by ZnO was investigated in the presence of oxidants such as NaClO3, NaBrO3, NaIO4, and K2S2O8 in an open reactor at 30 ºC.
Adriana Campano Lucilha, Keiko Takashima
doaj   +1 more source

Reaction of superoxide radicals with glycosaminoglycan chloramides: a kinetic study. [PDF]

open access: yes, 2013
Hypochlorous acid and its acid-base counterpart, hypochlorite ions, produced under inflammatory conditions, may produce chloramides of glycosaminoglycans, perhaps through the binding of myeloperoxidase directly to the glycosaminoglycans.
Parsons, BJ   +7 more
core   +1 more source

Iron‐Photocatalyzed Alkene Chloroaminoxylation: A Platform for Orthogonally Activatable Building Blocks

open access: yesAngewandte Chemie, EarlyView.
An iron‐photocatalyzed unsymmetrical 1,2‐hetero(atom)difunctionalization of alkenes enables to install orthogonal C–Cl and C–O (alkoxyamine) handles which provides access to diverse nucleophiles via complementary reactivity (SN and photoredox) at two distinct sites. Detailed mechanistic studies elucidate interesting features of the iron catalytic cycle.
Amrita Chaudhuri   +5 more
wiley   +2 more sources

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