Highly Uniaxial Orientation in Oligo(p-phenylenevinylene) Films Induced During Wet-Coating Process
摘要:
Highly uniaxial alignment of pi-conjugated oligo(p-phenylenevinylene)s was spontaneously achieved in the as-cast films by simply spin-coating the solution onto mechanically rubbed polymer alignment layers such as poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonic acid) (PEDOT:PSS) film, resulting in a high dichroic ratio (A(//)/A(perpendicular to)) of 41.0 and an order parameter ([A(//) - A(perpendicular to)]/[A(//) + 2A(perpendicular to)]) of 0.93 estimated from the polarized absorption spectra of the films, and its application to organic photovoltaic devices was also demonstrated to achieve a high anisotropy in photosensitivity.
An efficient class of bis-NHC salts: applications in Pd-catalyzed reactions under mild reaction conditions
作者:Chien-Cheng Chiu、Hui-Tzu Chiu、Dong-Sheng Lee、Ta-Jung Lu
DOI:10.1039/c8ra04094j
日期:——
(bis-NHC) salts that can be easily made from commercially available and inexpensive starting materials. The application of these salts to Pd-catalyzed reactions is described. The palladium (Pd) catalyst generated in situ was highly effective undermild reaction conditions.
Multidentate N‐Heterocyclic Carbene Complexes of Nickel and Palladium: Structural Analysis and Catalytic Application in Mizoroki–Heck Coupling Reaction
作者:Li‐Cheng Liu、Yan‐Hsiang Tzeng、Cheng‐Hau Hung、Hon Man Lee
DOI:10.1002/ejic.202000530
日期:2020.10.8
activities of the two sets of palladium complexes for the Mizoroki–Heck coupling reaction were investigated. The comparative data showed that despite the higher thermal stability and the presence of the flanking hemilabile pyridyl side‐arm which provided unsaturation to the metal center, the catalytic performance was slightly inferior to that of the tridentate palladium complex with a “throw‐away” pyridine