Synthesis and properties of naphthalenes carrying two cofacially oriented α-oligothiophene units at the peri positions
摘要:
Two cofacially oriented (oligo)thiophene units of 1,8-di(2-thienyl)-, 1,8-bis(5,2'-bithiophene-2-yl)-, and 1,8-bis(5,2':5',2"-terthiophene-2-yl)naphthalenes, which were synthesized starting from 1,8-dibromonaphthalene, interact with each other to stabilize the radical cations of these compounds, thus decreasing their CV oxidation potentials.
5,5′-Bis[8-(2-thienyl)naphthalene-1-yl]-2,2′-bithiophene and 5,5″-bis[8-(2-thienyl)naphthalene-1-yl]-2,2′:5′,2″-terthiophene were synthesized starting from 1,8-di(2-thienyl)naphthalene and 5,5″′-bis[8-(5,2′-bithiophene-2-yl)-naphthalene-1-yl]-2,2′:5′,2″:5″,2″′-quaterthiophene from 1,8-bis(5,2′-bithiophene-2-yl)naphthalene to investigate intramolecular interactions among the three thiophene units that
Multichannel transport in conjugated polymers based on through-space conjugated naphthalene
作者:Meijing Li、Xinxin Zhang、Shijie Zhen、Jingkun Xu
DOI:10.1039/d0nj05800a
日期:——
the properties of polymers are fully investigated. The crystal structures and theoretical calculations show that through-bond and through-spaceconjugations are integrated into one single molecule, allowing for two transport channels in conjugated polymers, which is beneficial for improving the redox activity and stability. The multichannel transport by integrating through-bond and through-space conjugations
Two isomeric 1,8-[1,8-naphthylenebis(2,2 ' -bithienyl-5,5 ' -ylene)] naphthalenes (major and minor isomers) were synthesized using the coupling reaction of 1,8-di(5-lithio-2-thienyl)naphthalene with CuCl2. The major isomer easily isomerized photochemically to yield the minor isomer. The redox and fluorescence behavior of the two isomers reflect both face-to-face interaction of the 2,2 ' -bithienyl-5,5 ' -ylene units and deformation of the naphthalene moieties. (C) 2001 Elsevier Science Ltd. All rights reserved.
Kuroda Masami, Nakayama Juzo, Hoshino Masamatsu, Furusho Noboru, Ohba Shi+, Tetrahedron Lett, 35 (1994) N 23, S 3957-3960