On the theory of vibronic structure of linear aggregates. Application to pseudoisocyanin (PIC)

Scherer, Philipp O. J.; Fischer, Sighart F.

doi:10.1016/0301-0104(84)80015-4

Cited by 186 publications

(141 citation statements)

References 18 publications

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“…This is reminiscent of the • shapes observed experimentally [7,8] and may suggest vibronic effects as one of the causes of the asymmetry between the positive and negative lobes in Frenkel exciton signals#. As demonstrated for the simple one-exciton model [2], vibronic effects give rise to a considerable difference in the absorption intensity distribution between the υ = 0 and υ = 1 states: in the former case, the leading contribution comes from the centre of the exciton Brillouin zone (k = 0), while in the latter case the contributions from zone edges (k = ±π) predominate. In our present description, this would be represented by different weighting (for υ = 0 and υ = 1) of the signals from the zone centre and zone edges.…”

Section: Resultsmentioning

confidence: 56%

“…[2] from a one-to a twodimensional model, and from one to a number of exciton states. Nevertheless, the results do suggest that the shape of the electroabsorption signal of a vibronic satellite may substantially differ from its υ = 0 counterpart, while in previous analyses [7,8,3] similar shapes were assumed by default.…”

Section: Resultsmentioning

confidence: 99%

“…In the latter case, however, real phonons may participate in addition to the virtual ones, so that e.g. the υ = 0 and υ = 1 polarons should normally have different phonon contributions, and may effectively probe different parts of the exciton Brillouin zone [2].…”

Section: Introductionmentioning

confidence: 99%

“…The most complete treatment is due to Scherer and Fischer [2]. They have shown that the distribution of absorption intensity over the exciton Brillouin zone is quite different for υ = 0 and υ = 1, in the latter case most of the intensity being concentrated at zone ends.…”

Section: Introductionmentioning

confidence: 99%

“…Although new bands may appear (at non-zero exciton wave vector [2]), but normally most of the effect shows up only as band broadening or minor changes of the shape.…”

Section: Introductionmentioning

confidence: 99%

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Exciton Electro-Absorption at Non-Zero Wave Vector

Slawik

Petelenz

1995

Acta Phys. Pol. A

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Based on a previously proposed two-dimensional model of a polyacene crystal, the contributions to the electro-absorption signal from different points of the exciton Brillouin zone are calculated. They are shown to differ substantially both in amplitude and in shape. This makes electro-absorptioii spectra very sensitive to vibronic coupling. On the one hand, the new factor is a potential complication in theoretical interpretations. On the other hand, it favours electro-absorption spectroscopy as a promising experimental tool to study vibronic echects.

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Section: Resultsmentioning

confidence: 56%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Although new bands may appear (at non-zero exciton wave vector [2]), but normally most of the effect shows up only as band broadening or minor changes of the shape.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Exciton Electro-Absorption at Non-Zero Wave Vector

Slawik

Petelenz

1995

Acta Phys. Pol. A

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Polymer‐Bound Supramolecular J‐Aggregates: Optical Properties and Applications

Sorokin

Yefimova

Malyukin

2018

Encyclopedia of Polymer Science and Technology

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Luminescent molecular aggregates, called J‐aggregates, are an interesting example of supramolecular structures with a number of unique spectral properties. Their optical properties are governed by the excitonic nature resulting from high‐order molecular packing in the J‐aggregate chains. The J‐aggregate characteristic feature is the bathochromically shifted narrow excitonic band termed the J‐band. The optical properties of J‐aggregates are markedly distinct from those of the individual molecules forming the aggregate, namely narrow absorption band, high oscillator strength, giant third‐order susceptibility, resonant luminescence, and effective exciton diffusion. Although solutions of J‐aggregates often possess low photostability for practical usage, their solid samples are more convenient, especially different polymer films due to their ease of preparation and availability of application. J‐aggregate formation in polymer films has both advantages and disadvantages: Some spectral characteristics could degrade, whereas composites creation could modify and improve their optical properties. This article aims to demonstrate how the interaction of J‐aggregates with polymers in both solution and solid film state affects their spectral properties. In addition, examples of composites and devices based on polymer‐bound J‐aggregates are discussed.

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Electrochemical preparation of pyronin Y thin films on gold substrates

Alanyalıoğlu

Arık

2008

J of Applied Polymer Sci

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Cyclic voltammetry, chronoamperometry, UV-vis absorption spectroscopy, fluorescence spectroscopy, FTIR spectroscopy, and AFM techniques have been employed to investigate pyronin Y thin films formed on Au(111) substrates by electrochemical oxidation of pyronin Y monomer. The medium used in the electropolymerization was an anhydrous acetonitrile solution containing 0.1M TBAClO 4 as supporting electrolyte. Anodic electropolymerization potential (1450 mV) of pyronin Y has been obtained from cyclic voltammetry data. Solid-state electropolymerization of pyronin Y was performed by the potential-controlled electrolysis technique. Chronoamperometry studies indicate that the adsorption of pyronin Y takes place in an instantaneous three-dimen-sional nucleation and growth mechanism which is accompanied by random adsorption. UV-vis absorption and fluorescence spectra of the electrolysis solution as a function of electrodeposition time show the adsorption of insoluble pyronin Y films on Au electrode surface. FTIRspecular reflectance of a polymer coated Au electrode reveals that there is a possible CAC coupling in the formation of polymeric pyronin Y structure. A well ordered polymeric chain structure of pyronin Y on Au(111) has been observed from AFM data.

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On the theory of vibronic structure of linear aggregates. Application to pseudoisocyanin (PIC)

Cited by 186 publications

References 18 publications

Exciton Electro-Absorption at Non-Zero Wave Vector

Exciton Electro-Absorption at Non-Zero Wave Vector

Polymer‐Bound Supramolecular J‐Aggregates: Optical Properties and Applications

Electrochemical preparation of pyronin Y thin films on gold substrates

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