Low-Temperature Emission Spectra of 9-Alkylanthracene Esters:Dimer Photodecomposition and Monomer Pair Interactions in Polymer Hosts

Salt, K.; Scott, Gary W.

doi:10.1021/j100091a009

Cited by 6 publications

(11 citation statements)

References 3 publications

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“…Spectroscopic measurements on trapped monomer pairs of pentacene, resulting from the photodecomposition of s- dipentacene, enable us to discuss the structure of this broken photodimer in a PMMA host matrix. Although we have obtained similar results previously at low temperatures for dianthracenes, , this is the first report of a stable monomer pair under room-temperature conditions at high pressures.…”

Section: Introductionsupporting

confidence: 88%

“…We have also reported the emission spectra of monomer pairs of 9-alkylanthracene esters following the breaking of their respective photodimers at 12 K in different polymer host matrixes . Host-dependent differences in the evolution of the fluorescence spectrum of these pairs, induced by temperature cycling, were attributed to the increase in monomer pair separation with the increase of the temperature cycle maximum.…”

Section: Introductionmentioning

confidence: 98%

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s-Dipentacene: Structure, Spectroscopy, and Temperature- and Pressure-Dependent Photochemistry

et al. 1999

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We report the synthesis, characterization, spectroscopy, and photochemistry of s-dipentacene (see Figure ). The symmetric addition product dimer of pentacene (s-dipentacene) is formed upon irradiation of a solution of pentacene. The structure of s-dipentacene was determined by X-ray crystallography. The crystals had a space group symmetry of P1̄ with two molecules per unit cell. One molecule in the unit cell was accompanied by two dichloromethane molecules of solvation. Photodecomposition of s-dipentacene, dispersed in a poly(methyl methacrylate) (PMMA) host matrix, to pentacene was studied. Spectroscopic evidence shows that this photodecomposition proceeds through a trapped intermediate both at low temperature (∼12 K) and at room temperature under high pressure (13 kbar). This intermediate is assigned as a “broken dimer” of two pentacene molecules trapped in the PMMA host. We previously reported similar results in the photolysis of both dianthracene and ditetracene at low temperatures, but this is the first report of broken dimer formation at room temperature under high pressure.

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Section: Introductionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 98%

s-Dipentacene: Structure, Spectroscopy, and Temperature- and Pressure-Dependent Photochemistry

et al. 1999

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“…6-[4-({6-[(9-Anthrylcarbonyl)oxy]hexyl}oxy-2,5-diiodophenoxy]hexyl 9-Anthracenecarboxylate (4b). The procedure for the preparation of 4b was adapted from ref . 9-Anthracenecarboxylic acid (250 mg, 1.12 mmol) was suspended in dry CH 2 Cl 2 (5 mL).…”

Section: Methodsmentioning

confidence: 99%

“…Propyl 9-Anthracenecarboxylate (PAC). PAC was prepared according to a previously described procedure . Recrystallization from MeOH afforded light yellow crystals (0.75 gr, 62%).…”

Section: Methodsmentioning

confidence: 99%

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Polarizing Energy Transfer in Photoluminescent Conjugated Polymers with Covalently Attached Sensitizers

1999

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A new class of poly(p-phenyleneethynylene) (PPE) polymers, COU-OPPE and ANT-OPPE, have been prepared, in which coumarin- and anthracene-based sensitizer molecules are covalently linked to the conjugated polymer backbone via a flexible spacer. In dilute solutions of these polymers, efficient resonance energy transfer is observed from the sensitizer moieties to the PPE backbone, resulting in enhanced luminescence of the PPE macromolecules. Also, when incorporated as guests in oriented polyethylene films, the novel polymers, COU-OPPE and ANT-OPPE, show efficient energy transfer from the pendent sensitizer to the PPE backbone. Especially in the case of ANT-OPPE, we found that the PPE backbone is efficiently oriented while the anthracene moiety remains essentially isotropic, which results in a high degree of polarizing energy transfer for this system.

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Regioselectivity in the photodimerization of 9-hydroxy-methylanthracene and 9-anthracene carboxylic acid esters in surfactant systems

Schütz

Wolff

1997

Journal of Photochemistry and Photobiology A: Chemistry

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Low-Temperature Emission Spectra of 9-Alkylanthracene Esters:Dimer Photodecomposition and Monomer Pair Interactions in Polymer Hosts

Cited by 6 publications

References 3 publications

s-Dipentacene: Structure, Spectroscopy, and Temperature- and Pressure-Dependent Photochemistry

s-Dipentacene: Structure, Spectroscopy, and Temperature- and Pressure-Dependent Photochemistry

Polarizing Energy Transfer in Photoluminescent Conjugated Polymers with Covalently Attached Sensitizers

Regioselectivity in the photodimerization of 9-hydroxy-methylanthracene and 9-anthracene carboxylic acid esters in surfactant systems

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