1000391-93-4Relevant articles and documents
“π-Hole?π” Interaction Promoted Photocatalytic Hydrodefluorination via Inner-Sphere Electron Transfer
Lu, Jingzhi,Khetrapal, Navneet S.,Johnson, Jacob A.,Zeng, Xiao Cheng,Zhang, Jian
, p. 15805 - 15808 (2016)
We describe a metal-free, photocatalytic hydrodefluorination (HDF) of polyfluoroarenes (FA) using pyrene-based photocatalysts (Py). The weak “π-hole?π” interaction between Py and FA promotes the electron transfer against unfavorable energetics (ΔGET up to 0.63 eV) and initiates the subsequent HDF. The steric hindrance of Py and FA largely dictates the HDF reaction rate, pointing to an inner-sphere electron transfer pathway. This work highlights the importance of the size and shape of the photocatalyst and the substrate in controlling the electron transfer mechanism and rates as well as the overall photocatalytic processes.
Steric inhibition of π-stacking: 1,3,6,8-tetraarylpyrenes as efficient blue emitters in organic light emitting diodes (OLEDs)
Moorthy, Jarugu Narasimha,Natarajan, Palani,Venkatakrishnan, Parthasarathy,Huang, Duo-Fong,Chow, Tahsin J.
, p. 5215 - 5218 (2008/09/17)
(Figure Presented) The sterically congested tetraarylpyrenes 1-3, which can be readily accessed by Suzuki coupling, exhibit no-aggregation (π-stacking) behavior in both solution and solid states. The indisposed tendency of 1-3 toward crystallization and their moderate molecular dimensions permit exploitation as blue light emitting materials in OLEDs with respectable device performances.
