Photophysical Processes in Polymers. VII. Electronic Energy Migration and Trapping in Alternating Copolymers

Fox, Robert B.; Price, Thomas R.; Cozzens, Robert F.; Echols, W. H.

doi:10.1021/ma60042a046

Cited by 77 publications

(24 citation statements)

References 4 publications

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“…In each of the polymers, the shorter wavelength band in the fluorescence spectrum, which is often structured, was attributed to monomeric emission, whereas the longer wavelength band was assigned to the fluorescence of intra- or interchain excimers. These conclusions were substantiated by results from spectra of one- and two-chromophore model compounds. − …”

Section: Discussionmentioning

confidence: 76%

“…The copolymerization technique affords a new type of dilution superimposed on ordinary concentration effects: i.e., the separation of the chromophores along the polymer chain. This approach has been used for the study of the fluorescence behavior of several vinyl aromatic polymers including polystyrene, poly(1-vinylnaphthalene) and its copolymers with styrene and methyl methacrylate, poly(2-vinylnaphthalene), alternating copolymers of styrene with methyl methacrylate or 2-naphthyl methacrylate, alternating copolymers of 2-vinylnaphthalene with methyl methacrylate, and random copolymers of styrene with methyl methacrylate. − Excimers in these systems were observed under a variety of conditions. In each of the polymers, the shorter wavelength band in the fluorescence spectrum, which is often structured, was attributed to monomeric emission, whereas the longer wavelength band was assigned to the fluorescence of intra- or interchain excimers.…”

Section: Discussionmentioning

confidence: 99%

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Light-Emitting Polymers with Pendant Chromophoric Groups. 2. Poly[styrene-co-(p-(stilbenylmethoxy)styrene)]

Aguiar

Karasz

et al. 1996

Macromolecules

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A new fluorescent polystyrene derivative is reported in which a stilbene-based chromophoric pendant group is attached on average to each third monomeric unit. Poly[styrene-co-(p-(stilbenylmethoxy)styrene)] showed fluorescence emission from intra-and interchain interaction. The model compound p-((p-ethylphenoxy)methyl)stilbene is the first stilbene derivative to show aggregate emission in solution at room temperature reported to date. It is proposed that the emission originates from the association of chromophores in the ground state forming a fluorescent dimer or aggregate complex.

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Section: Discussionmentioning

confidence: 76%

Section: Discussionmentioning

confidence: 99%

Light-Emitting Polymers with Pendant Chromophoric Groups. 2. Poly[styrene-co-(p-(stilbenylmethoxy)styrene)]

Aguiar

Karasz

et al. 1996

Macromolecules

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“…In some of the earliest work, a trapping molecule was attached to the polymer backbone, and the effect of trap sensitization through excitation of the main polymer chromophore was studied (70). One of the major difficulties of using linear polymeric systems, however, is that light harvesting and directional energy migration are impeded by polymer chain folding, especially in response to solvent, temperature, and arrangement of pendant groups (52,71).…”

Section: Opportunities For Nanotechnology: Synthetic and Biomimetic Amentioning

confidence: 99%

Approaches for biological and biomimetic energy conversion

LaVan

Jennifer²

2006

Proc. Natl. Acad. Sci. U.S.A.

116

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This article highlights areas of research at the interface of nanotechnology, the physical sciences, and biology that are related to energy conversion: specifically, those related to photovoltaic applications. Although much ongoing work is seeking to understand basic processes of photosynthesis and chemical conversion, such as light harvesting, electron transfer, and ion transport, application of this knowledge to the development of fully synthetic and͞or hybrid devices is still in its infancy. To develop systems that produce energy in an efficient manner, it is important both to understand the biological mechanisms of energy flow for optimization of primary structure and to appreciate the roles of architecture and assembly. Whether devices are completely synthetic and mimic biological processes or devices use natural biomolecules, much of the research for future power systems will happen at the intersection of disciplines.biotechnology ͉ nanotechnology ͉ photosynthesis ͉ photovoltaic R ecently, the National Academies and the Keck Foundation held a meeting to discuss the development of new applications for nanotechnology ¶ with the goal of identifying challenges where the convergence of nanoscience and physical and biosciences could provide a revolutionary outcome. One area clearly in need of new technologies is biological and biomimetic methods of energy conversion. Within this broad area, focus was given to two specific applications: the conversion of solar energy into useful electrical or chemical energy and the production of power for in vivo medical devices. The following sections will provide both an economic perspective on current photovoltaic (PV) technology and an overview of the various research efforts toward using or mimicking biological systems to improve current and future energy-conversion systems.

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“…For example, Fox et al reported the excimer emission of poly[α‐(1‐pyrenyl)acrylate] (poly‐ Py1 ) . However, there are some reports on the fluorescence property of an alternating copolymer of MMA and styrene, where the intramolecular excimer formation between the neighboring styrene units is almost completely suppressed, probably because the MMA units functioned as spacers to prevent the interaction of phenyl groups . Thus, the alternating copolymers of MMA and α‐arylacrylates, including Py1 , are expected to reduce the intramolecular excimer formation.…”

Section: Introductionmentioning

confidence: 99%

Anionic alternating copolymerization of α-arylacrylates with methyl methacrylate: Effect of monomer sequence on fluorescence

Kohsaka

Yamaguchi

Kitayama

2014

J. Polym. Sci. Part A: Polym. Chem.

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Anionic polymerizations of acrylates possessing 1‐pyrenyl (Py1), 1‐naphthyl (Np1), 2‐naphthyl (Np2), and 2‐fluorenyl (Fl2) groups as α‐substituents were investigated as well as the properties of the obtained polymers. Py1 and Np1 did not undergo polymerization, whereas Np2 and Fl2, annulated α‐phenylacrylates at 3,4‐position of the phenyl group, afforded homo‐oligomers and alternating copolymers with methyl methacrylate (MMA). The oligomer of Fl2 [oligo(Fl2)] exhibited strong excimer emission in diluted solution. In contrast, dominant monomer emission was observed for the alternating copolymer with MMA [poly(Fl2‐co‐MMA)]. In the alternating copolymer, MMA units could function as spacers preventing the association of pendant fluorene moieties to suppress the excimer formation. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014, 52, 2806–2814

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Photophysical Processes in Polymers. VII. Electronic Energy Migration and Trapping in Alternating Copolymers

Cited by 77 publications

References 4 publications

Light-Emitting Polymers with Pendant Chromophoric Groups. 2. Poly[styrene-co-(p-(stilbenylmethoxy)styrene)]

Light-Emitting Polymers with Pendant Chromophoric Groups. 2. Poly[styrene-co-(p-(stilbenylmethoxy)styrene)]

Approaches for biological and biomimetic energy conversion

Anionic alternating copolymerization of α-arylacrylates with methyl methacrylate: Effect of monomer sequence on fluorescence

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