Organogels formed by substituent-free pyrene-appended oligo(m-phenylene ethynylene)s
作者:Yuan-Yuan Chen、Hui Wang、Dan-Wei Zhang、Jun-Li Hou、Zhan-Ting Li
DOI:10.1039/c5cc04006j
日期:——
Substituent-free pyrene-appended m-phenylene ethynylene oligomers have been revealed to gelate organic solvents of low and modest polarity.
无取代基的芘附加的m-苯乙炔寡聚物已被发现能凝胶低极性和适度极性的有机溶剂。
Photochromic Properties of [2.2]Paracyclophane-Bridged Imidazole Dimer with Increased Photosensitivity by Introducing Pyrenyl Moiety
作者:Hiroaki Yamashita、Jiro Abe
DOI:10.1021/jp204440s
日期:2011.11.24
photochromic [2.2]paracyclophane-bridged imidazole dimers show instantaneous coloration upon exposure to UV light and rapid fading in the dark. A new [2.2]paracyclophane-bridged imidazole dimer, pseudogem-PPI-DPI[2.2]PC, with high photosensitivity to UVA radiation was developed. To enhance the photosensitivity, we introduced pyrenyl moieties to the [2.2]paracyclophane-bridged imidazole dimer. The localized
The highest efficient red-to-green upconversion is achieved in a TTA-UC pair consisted of PdTPTBP and pyrene derivative via molecular engineering. This pair is successfully used to activate photooxidation of aryl boronic acid under red light, and the reaction yield is greatly improved compared to green light, showing the advantage of TTA-UC in photoredoxcatalysis.
hydrocarbon based on phenalenyl unit acts as a catalyst for cross-coupling between arylhalides and arylalkynes synthesizing a rich library of internal alkynes without any external stimuli. This protocol was extended to accomplish the Sonogashira-type couplingunder transition-metal-free and solvent-free conditions.
Polycyclic Arene-Fused Selenophenes via Site Selective Selenocyclization of Arylethynyl Substituted Polycyclic Arenes
作者:Himadri S. Karmakar、Chandan Kumar、Neha Rani Kumar、Sarasija Das、Abhijeet R. Agrawal、Nani Gopal Ghosh、Sanjio S. Zade
DOI:10.1021/acs.joc.1c00689
日期:2021.9.17
understand the site selectivity in the selenophene formation reaction. The HOMO coefficient on the carbon adjacent to carbon having arylalkyne substituent of the polycyclic arene correlates with the selenocyclization tendency of the substrate. The wavelength of absorption and emission and quantum yield of emission increase with increasing the number of fused benzene rings in the polycyclic unit (from naphthalene