Linear Conjugated Polymer Backbones Improve Alignment in Nanogroove-Assisted Organic Field-Effect Transistors
摘要:
Three cyclopentadithiophene-difluorophenylene copolymers (named PhF2,3, PhF2,5, and PhF2,6), which differ by the arrangement of fluorines on the phenylene structural unit, were designed and synthesized for the fabrication of organic field-effect transistors (OFETs). Single crystal structures of model compounds representative of the backbone and density functional theory (DFT) were used to estimate the backbone shape for each copolymer. The different substitution arrangements impact the backbone secondary structure through different nonbonding F center dot center dot center dot H interactions. PhF2,5 and PhF2,6 assumed more linear backbones relative to PhF2,3, which in turn impacts self-assembly and polymer chain alignment on nano grooved (NG) substrates. A larger improvement of charge carrier mobility for the more linear backbones was achieved when using NG substrates. Among the three polymers, PhF2,6 achieved the highest average field-effect hole mobility (5.1 cm(2) V-1 s(-1)). As evidenced by grazing incidence wide-angle X-ray scattering (GIWAXS), thin films of PF2,5 and PF2,6 exhibited a higher degree of anisotropic alignment, relative to the more curved PF2,3 counterpart, consistent with the higher hole mobilities. This work gives insight into how nonbonding interactions can influence charge carrier mobility through changes in secondary structure and suggests that polymers with more linear shapes might be preferred for achieving greater levels of alignment within the confines of a NG environment.
[EN] PHOSPHATE-SUBSTITUTED QUINOLIZINE DERIVATIVES USEFUL AS HIV INTEGRASE INHIBITORS<br/>[FR] DÉRIVÉS DE QUINOLIZINE SUBSTITUÉS PAR UN PHOSPHATE UTILES EN TANT QU'INHIBITEURS DE L'INTÉGRASE DU VIH
申请人:MERCK SHARP & DOHME
公开号:WO2016154527A1
公开(公告)日:2016-09-29
The present invention relates to Phosphate Substituted Quinolizine Derivatives of Formula (I): and pharmaceutically acceptable salts or prodrug thereof, wherein X, Y, R1, R2, R3, R4, R5, R9 and R10 are as defined herein. The present invention also relates to compositions comprising at least one Phosphate Substituted Quinolizine Derivative, and methods of using the Phosphate Substituted Quinolizine Derivatives for treating or preventing HIV infection in a subject.
PYRIDONE COMPOUND AND AGRICULTURAL AND HORTICULTURAL FUNGICIDE
申请人:Mitsui Chemicals Agro, Inc.
公开号:EP3636636B1
公开(公告)日:2022-07-06
NOVEL WEAK DONOR-ACCEPTOR CONJUGATED COPOLYMERS FOR FIELD- EFFECT TRANSISTOR APPLICATIONS
申请人:The Regents of the University of California
公开号:US20190348608A1
公开(公告)日:2019-11-14
Conjugated donor-acceptor copolymers comprising a donor and an acceptor, wherein the acceptor comprises a fluorophenylene. Organic Field Effect Transistors (OFETs) comprising the conjugated donor-acceptor copolymers are also disclosed.