Related Products of 882-33-7In 2019 ,《Using sulfur bridge oxidation to control electronic coupling and photochemistry in covalent anthracene dimers》 was published in Chemical Science. The article was written by Cruz, Chad D.; Yuan, Jennifer; Climent, Claudia; Tierce, Nathan T.; Christensen, Peter R.; Chronister, Eric L.; Casanova, David; Wolf, Michael O.; Bardeen, Christopher J.. The article contains the following contents:
Covalently tethered bichromophores provide an ideal proving ground to develop strategies for controlling excited state behavior in chromophore assemblies. In this work, optical spectroscopy and electronic structure theory are combined to demonstrate that the oxidation state of a sulfur linker between anthracene chromophores gives control over not only the photophysics but also the photochem. of the mols. Altering the oxidation state of the sulfur linker does not change the geometry between chromophores, allowing electronic effects between chromophores to be isolated. Previously, we showed that excitonic states in sulfur-bridged terthiophene dimers were modulated by electronic screening of the sulfur lone pairs, but that the sulfur orbitals were not directly involved in these states. In the bridged anthracene dimers that are the subject of the current paper, the AOs of the unoxidized S linker can actively mix with the anthracene MOs to form new electronic states with enhanced charge transfer character, different excitonic coupling, and rapid (sub-nanosecond) intersystem crossing that depends on solvent polarity. However, the fully oxidized SO2 bridge restores purely through-space electronic coupling between anthracene chromophores and inhibits intersystem crossing. Photoexcitation leads to either internal conversion on a sub-20 ps timescale, or to the creation of a long-lived emissive state that is the likely precursor of the intramol. [4 + 4] photodimerization. These results illustrate how chem. modification of a single atom in the covalent bridge can dramatically alter not only the photophysics but also the photochem. of mols. The experimental part of the paper was very detailed, including the reaction process of 1,2-Diphenyldisulfane(cas: 882-33-7Related Products of 882-33-7)
1,2-Diphenyldisulfane(cas: 882-33-7) belongs to ethers.Oxygen is more electronegative than carbon, thus the alpha hydrogens of ethers are more acidic than those of simple hydrocarbons. Related Products of 882-33-7 They are far less acidic than alpha hydrogens of carbonyl groups (such as in ketones or aldehydes), however.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem