173470-96-7

Upstream product

• 100-39-0 benzyl bromide 
• 10495-73-5 2-bromo-6-(pyridin-2-yl)pyridine 
• 173470-97-8 6-benzyl-2,2'-bipyridine 

Relevant academic research and scientific papers

Proton-Transfer Processes in Well-Defined Media: Experimental Investigation of Photoinduced and Thermal Proton-Transfer Processes in Single Crystals of 2-(2,4-Dinitrobenzyl)pyridine Derivatives

A detailed spectroscopic study of photoinduced and thermally activated proton-transfer processes for a series of different crystals of 2-(2,4-dinitrobenzyl)pyridine derivatives has been performed.The quantitative analysis of ground- and excited-state activation barriers and preexponential factors in deuterated and nondeuterated crystals shows clearly that the observed photochromism is linked to a proton-transfer process.Furthermore, it is clearly seen that the supramolecular environment of the transferred proton participates in the proton-transfer process.These supramolecular effects control the relative rates and efficiencies of the observed proton-transfer processes in both the ground and excited state, yielding, at room temperature, photoproducts having lifetimes ranging between hours and weeks.At least two proton-accepting groups may be active in the abstraction of the proton from its relatively stable benzylic position.Additionally, low-temperature measurements of proton-transfer processes show that tunneling processes prevail at temperatures below 100 K only in the excited state.No evidence for tunneling could be found for ground-state processes.

Kristallpackungsabhaengige Photochromie: photoinduzierte und thermische Protonentransferprozesse in Einkristallen von 6-(2,4-Dinitrobenzyl)-2,2'-bipyridin

Keywords: Festkoerperstrukturen; Nitroverbindungen; Photochromie; Protonentransfer; Tautomerie