Conjugated alternating copolymers containing both donor and acceptor moieties in the main chain

2007 ◽  
pp. 1704-1706 ◽  
Author(s):  
Ming Zhang ◽  
Changduk Yang ◽  
Ashok K. Mishra ◽  
Wojciech Pisula ◽  
Gang Zhou ◽  
...  
Keyword(s):  
Main Chain ◽  
Alternating Copolymers ◽  
Donor And Acceptor

Facile photochemical synthesis of main-chain-type semifluorinated alternating copolymers catalyzed by conventional amines or halide salts

2021 ◽  
Author(s):  
Yuxue Wang ◽  
Kai Tu ◽  
Jiannan Cheng ◽  
Enjie He ◽  
Jinying Wang ◽  
...  
Keyword(s):  
Main Chain ◽  
Halogen Bond ◽  
Low Cost ◽  
Photochemical Synthesis ◽  
Alternating Copolymers ◽  
Halide Salts ◽  
Chain Type

In this work, we report a much simple and low-cost method to prepare main-chain-type semifluorinated alternating copolymers by the formation of halogen bond (XB) complex between α,ω-diiodoperfluoroalkanes and amines/halide salts....

Synthesis and properties of fluorene or carbazole-based alternating copolymers containing Si and vinylene units in the main chain

2008 ◽  
Vol 46 (13) ◽  
pp. 4513-4521 ◽  
Author(s):  
Naofumi Naga ◽  
Nanae Tagaya ◽  
Hiroyuki Noda ◽  
Takahiro Imai ◽  
Haruhiko Tomoda
Keyword(s):  
Main Chain ◽  
Alternating Copolymers

Synthesis of Main-Chain Metallo-Copolymers Containing Donor and Acceptor Bis-Terpyridyl Ligands for Photovoltaic Applications

2012 ◽  
Vol 33 (6-7) ◽  
pp. 528-533 ◽  
Author(s):  
Harihara Padhy ◽  
Mohan Ramesh ◽  
Dhananjaya Patra ◽  
Rudrakanta Satapathy ◽  
Murali Krishna Pola ◽  
...  
Keyword(s):  
Main Chain ◽  
Donor And Acceptor ◽  
Photovoltaic Applications

scholarly journals Synthesis and Properties of Poly(ferrocenylsilane)s Containing Si-Vinylene Units in the Main Chain

2016 ◽  
Vol 8 (2) ◽  
pp. 86
Author(s):  
Naofumi Naga ◽  
Yoshie Saito
Keyword(s):  
Molecular Weight ◽  
Electron Transfer ◽  
Cyclic Voltammetry ◽  
Redox Potential ◽  
Diffusion Coefficients ◽  
Heck Reaction ◽  
Main Chain ◽  
Low Molecular Weight ◽  
Alternating Copolymers

<p>Poly(ferrocenylsilane)s containing Si-vinylene unit in the main chain have been synthesized by Mizoroki-Heck reaction of 1,1’-bis(dimethylvinylsilyl)ferrocene (MVFS) and dibromo aryl compounds using palladium diacetate as a catalyst. The alternating copolymers with relatively low molecular weight were obtained in good yields. Cyclic voltammetry of the copolymers in CH<sub>2</sub>Cl<sub>2</sub> solutions showed redox potential derived from the ferrocene units in the copolymers. The voltammograms the copolymers indicated that almost no difference in numbers of electron transfer compared with MVFS. By contrast, diffusion coefficients of the ferrocene units in the copolymers were smaller than that of MVSF. The copolymers showed reversible electrochromism from yellow to blue-green due to the redox of ferrocene units in the main chain by 3V of application.</p>

scholarly journals Energy transfer processes along a supramolecular chain of π-conjugated molecules

2012 ◽  
Vol 370 (1972) ◽  
pp. 3787-3801 ◽  
Author(s):  
S. A. Schmid ◽  
R. Abbel ◽  
A. P. H. J. Schenning ◽  
E. W. Meijer ◽  
L. M. Herz
Keyword(s):  
Wave Function ◽  
Energy Transfer ◽  
Main Chain ◽  
Polymer Chains ◽  
Linear Polymer ◽  
Exciton Migration ◽  
Energy Donor ◽  
Donor And Acceptor ◽  
Initial Excitation ◽  
Quadruple Hydrogen Bonding

We have investigated the energy transfer dynamics in a supramolecular linear polymer chain comprising oligofluorene (OF) energy donor units linked by quadruple hydrogen-bonding groups, and oligophenylene (OPV) chain ends that act as energy acceptors. Using femtosecond spectroscopy, we followed the dynamics of energy transfer from the main chain of OF units to the OPV chain ends and simulated these data taking a Monte Carlo approach that included different extents of electronic wave function delocalization for the energy donor and acceptor. Best correlations between experimental and theoretical results were obtained for the assumption of electronic coupling occurring between a localized donor dipole moment and a delocalized acceptor moment. These findings emphasize that geometric relaxation following initial excitation of the donor needs to be taken into account, as it leads to a localization of the donor's excited state wave function prior to energy transfer. In addition, our simulations show that the energy transfer from the main chain to the ends is dominated by an interplay between slow and spatially limited exciton migration along the OF segments comprising the main chain and the comparatively faster hetero-transfer to the end-cap acceptors from directly adjoining OF segments. These results clearly support the description of host–guest energy transfer in linear polymer chains as a two-step mechanism with exciton diffusion in the host being a prerequisite to energy transfer to the guest.

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