Acceptor Side-Chain Effects on the Excited State Dynamics of Two-Dimensional-Like Conjugated Copolymers in Solution
AbstractExcited state dynamics of two-dimensional-like conjugated copolymers PFDCN and PFSDCN based on alternating fluorene and triphenylamine main chains and malononitrile pendant acceptor groups with thiophene as π-bridge, have been investigated by using transient absorption spectroscopy. There is an additional conjugated –C=C– bond in PFDCN, which distinguishes it from PFSDCN. The lowest energy absorption band of each copolymer absorption spectrum is attributed to the π−π* transition with intramolecular charge-transfer, which has a lower fluorescence contribution than those of higher energy absorption bands. The optical excitation of either PFDCN or PFSDCN solution generates polaron pairs that then self-localize and evolve to a bound singlet exciton within a few picoseconds. Due to the additional conjugated –C=C– bond in the acceptor side-chain, PFDCN has a stronger intramolecular charge-transfer characteristic compared with PFSDCN, therefore exhibiting a longer self-localization time (7 ps vs. 3 ps for PFSDCN) and a shorter fluorescence lifetime (1.48 ns vs. 1.60 ns for PFSDCN). View Full-Text
- Supplementary File 1:
PDF-Document (PDF, 801 KB)
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Huo, M.-M.; Hu, R.; Yan, W.; Wang, Y.-T.; Chee, K.W.A.; Wang, Y.; Zhang, J.-P. Acceptor Side-Chain Effects on the Excited State Dynamics of Two-Dimensional-Like Conjugated Copolymers in Solution. Molecules 2017, 22, 1398.
Huo M-M, Hu R, Yan W, Wang Y-T, Chee KWA, Wang Y, Zhang J-P. Acceptor Side-Chain Effects on the Excited State Dynamics of Two-Dimensional-Like Conjugated Copolymers in Solution. Molecules. 2017; 22(9):1398.Chicago/Turabian Style
Huo, Ming-Ming; Hu, Rong; Yan, Wei; Wang, Yi-Tong; Chee, Kuan W.A.; Wang, Yong; Zhang, Jian-Ping. 2017. "Acceptor Side-Chain Effects on the Excited State Dynamics of Two-Dimensional-Like Conjugated Copolymers in Solution." Molecules 22, no. 9: 1398.
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.