Kinetics of Excimer Formation in Poly(1-naphthyl methacrylate)

Aspler, J. S.; Guillet, J. E.

doi:10.1021/ma60072a015

Cited by 50 publications

(26 citation statements)

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“…Moreover, the chain length was very important in providing a sufficient number of chromophore–chromophore interactions in the intramolecular system; this resulted in an increase in the fluorescence intensity with an increasing molecular weight of P2NA. Aspler and Guillet59 and Nishijima et al60 also reported similar results when they studied the fluorescence of poly(1‐naphthyl methacrylate) and poly(1‐vinylnaphthalene), respectively. Figure 8(b) shows the fluorescence spectra of P2NA and the P2NA‐ b ‐PSt diblock polymer, and Figure 8(c) shows the fluorescence spectra of well‐defined PSt that was synthesized according to the method described in ref.…”

Section: Optical Properties Of the Polymersmentioning

confidence: 64%

Reversible addition–fragmentation chain transfer polymerization of 2‐naphthyl acrylate with 2‐cyanoprop‐2‐yl 1‐dithionaphthalate as a chain‐transfer agent

Zhang¹,

Zhu²,

Zhou³

et al. 2005

J. Polym. Sci. A Polym. Chem.

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The reversible addition-fragmentation chain transfer (RAFT) polymerizations of 2-naphthyl acrylate (2NA) initiated by 2,2 0 -azobisisobutyronitrile were investigated with 2-cyanoprop-2-yl 1-dithionaphthalate (CPDN) as a RAFT agent at various temperatures in a benzene solution. The results of the polymerizations showed that 2NA could be polymerized in a controlled way by RAFT polymerization with CPDN as a RAFT agent; the polymerization rate was first-order with respect to the monomer concentration, and the molecular weight increased linearly with the monomer conversion. The polydispersities of the polymer were relatively low up to high conversions in all cases. The chain-extension reactions of poly(2-naphthyl acrylate) (P2NA) with methyl methacrylate and styrene successfully yielded poly(2-naphthyl acrylate)-b-poly(methyl methacrylate) and poly(2-naphthyl acrylate)-b-polystyrene block polymers, respectively, with narrow polydispersities. The P2NA obtained by RAFT polymerization had a strong ultraviolet absorption at 270 nm, and the molecular weights had no apparent effect on the ultraviolet absorption intensities; however, the fluorescence intensity of P2NA increased as the molecular weight increased and was higher than that of 2NA. V V C 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym

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Section: Optical Properties Of the Polymersmentioning

confidence: 64%

Reversible addition–fragmentation chain transfer polymerization of 2‐naphthyl acrylate with 2‐cyanoprop‐2‐yl 1‐dithionaphthalate as a chain‐transfer agent

Zhang¹,

Zhu²,

Zhou³

et al. 2005

J. Polym. Sci. A Polym. Chem.

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“…When such a polymer is dissolved in a suitable solvent and the naphthalene groups are irradiated, extensive energy migration occurs between the naphthalene groups followed by transfer to the anthracene and emission of anthracene fluorescence. (19) The relative intensities of naphthalene and anthracene fluorescence are independent of concentration over a very wide range of dilution (Fig. 12) and it seems clear that the energy transfer observed is intra-rather than intermolecular.…”

Section: Unauthenticatedmentioning

confidence: 96%

Studies of energy transfer and molecular mobility in polymer photochemistry

Guillet¹

1977

Pure and Applied Chemistry

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“…The flexible polymer chain of the low-molecular-weight polymer A may make the complexation with b-CD easier and faster. [22] On the contrary, dissociation of the formed complex was also faster at higher temperatures and yielded maximal complexation at 30 8C, a much lower temperature than for polymer B (Figure 7).…”

Section: Resultsmentioning

confidence: 93%

Induced Circular Dichroism to Optically Active Poly{[methyl(1‐naphthyl)silylene](o‐phenylene)methylene}s Assisted by Supramolecular Complexation with β‐Cyclodextrin

Uenishi

Kawakami

2005

Macro Chemistry & Physics

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Summary: Optically active poly{methyl(1‐naphthyl)silylene](o‐phenylene)methylene}s with different molecular weights and configurations were prepared, and their supramolecular complexes with β‐cyclodextrin were investigated in a water–tetrahydrofuran mixture (1:1 v/v) at the temperatures between 25 and 68 °C. Complexation was very sensitive to sample preparation, molecular weight of the polymer as well as the configuration of the chiral silicon center. Supramolecular complexation, followed by changes in the circular dichroism, took place enantioselectively and the complex of the high‐molecular weight (+)‐polycarbosilane with β‐cyclodextrin exhibited a dramatic change in its induced circular dichroism. The mechanism of this unique complexation was investigated by SEC, 1H NMR spectroscopy, UV, fluorescence, and circular dichroism.Supramolecular complexation of β‐cyclodextrin with the optically active and isotactic polymer.magnified imageSupramolecular complexation of β‐cyclodextrin with the optically active and isotactic polymer.

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Kinetics of Excimer Formation in Poly(1-naphthyl methacrylate)

Cited by 50 publications

References 15 publications

Reversible addition–fragmentation chain transfer polymerization of 2‐naphthyl acrylate with 2‐cyanoprop‐2‐yl 1‐dithionaphthalate as a chain‐transfer agent

Reversible addition–fragmentation chain transfer polymerization of 2‐naphthyl acrylate with 2‐cyanoprop‐2‐yl 1‐dithionaphthalate as a chain‐transfer agent

Studies of energy transfer and molecular mobility in polymer photochemistry

Induced Circular Dichroism to Optically Active Poly{[methyl(1‐naphthyl)silylene](o‐phenylene)methylene}s Assisted by Supramolecular Complexation with β‐Cyclodextrin

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