Brickstone arrangement in J-aggregates on an amphiphilic merocyanine dye

Wolthaus, L.; Schaper, A.; Möbius, Dietmar

doi:10.1016/0009-2614(94)87088-8

Cited by 61 publications

(59 citation statements)

References 17 publications

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“…Thus the direct comparison of the molecular arrangements observed in refs. [26][27][28][29] with those of in solution grown J-and H-aggregates such as considered in the present work seems to be irrelevant.…”

Section: Some General Remarks On the Staircase Ladder And Brickwork mentioning

confidence: 65%

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Molecular Arrangements in Two-Dimensional J-Aggregate Monolayers of Cyanine Dyes

Прохоров¹,

Pozin²,

Lypenko³

et al. 2012

MHC

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Atomic force microscopy was used for the study of two-dimensional J-aggregates monolayer structures of two cyanine dyes with a high-resolution. Two coexisting morphologically different types (i.e. the bilayer rectangular stripes and monolayer curve shaped leaves) were observed for 3,3'-di(γ-sulfopropyl)-4,4',5,5'-dibenzo-9-ethylthiacarbocyanine betaine pyridinium (dye D-1 (пиридиниевая соль 3,3'-ди(γ-сульфопропил)-4,4',5,5'-дибензо-9-этилтиокарбоцианин бетаина, D-1Two-Dimensional J-Aggregate Monolayers of Cyanine Dyes J-агрегатах второго красителя (5,5'-дихлоро-3,3'-дисульфопропилтиацианинат натрия, D-2)

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Section: Some General Remarks On the Staircase Ladder And Brickwork mentioning

confidence: 65%

“…[26][27][28][29] The monolayers growth and their molecular structures were however essentially promoted by the surface forces influencing the surface assembly at the molecular level. Thus the direct comparison of the molecular arrangements observed in refs.…”

Section: Some General Remarks On the Staircase Ladder And Brickwork mentioning

confidence: 99%

Molecular Arrangements in Two-Dimensional J-Aggregate Monolayers of Cyanine Dyes

Прохоров¹,

Pozin²,

Lypenko³

et al. 2012

MHC

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“…This theoretical investigation is motivated by several studies that have noted deviations from Förster theory's characteristic − R 6 dependence on the rate of EET (the rate of EET is proportional to the square of the coupling) [41][42][43]. Any deviations from Förster theory could have an impact on design strategies for the development of mesoscopic energy harvesting materials [47][48][49][50][51][52][53][54][55][56][57][58][59].…”

Section: Resultsmentioning

confidence: 99%

A quantum dynamical comparison of the electronic couplings derived from quantum electrodynamics and Förster theory: application to 2D molecular aggregates

Frost

Jones

2014

New J. Phys.

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The objective of this study is to investigate under what circumstances Förster theory of electronic (resonance) energy transfer breaks down in molecular aggregates. This is achieved by simulating the dynamics of exciton diffusion, on the femtosecond timescale, in molecular aggregates using the Liouville-von Neumann equation of motion. Specifically the focus of this work is the investigation of both spatial and temporal deviations between exciton dynamics driven by electronic couplings calculated from Förster theory and those calculated from quantum electrodynamics. The quantum electrodynamics (QED) derived couplings contain medium-and far-zone terms that do not exist in Förster theory. The results of the simulations indicate that Förster coupling is valid when the dipole centres are within a few nanometres of one another. However, as the distance between the dipole centres increases from 2 nm to 10 nm, the intermediate-and far-zone coupling terms play non-negligible roles and Förster theory begins to break down. Interestingly, the simulations illustrate how contributions to the exciton dynamics from the intermediate-and far-zone coupling terms of QED are quickly washed-out by the near-zone mechanism of Förster theory for lattices comprising closely packed molecules. On the other hand, in the case of sparsely packed arrays, the exciton dynamics resulting from the different theories diverge within the 100 fs lifetime of the trajectories. These results could have implications for the application of spectroscopic ruler techniques as well as design principles relating to energy harvesting materials.

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“… 34 , 35 Many examples of J- and H- aggregates are experimentally known. The cyanine-based dyes (pseudoisocyanine, 14 , 36 , 37 merocyanine, 38 , 39 and thiacarbocyanine 40 , 41 ), perylene diimides, 42 , 43 and porphyrins 44 , 45 are among the mostly known J-aggregates. H-aggregating chromophores include certain carotenoids, 46 , 47 oligothiophenes, 48 , 49 oligophenylenevinylenes, 50 , 51 as well as perylene diimides, 52 , 53 some of which can form both H- and J-aggregation types.…”

Section: Introductionmentioning

confidence: 99%

Bright Frenkel Excitons in Molecular Crystals: A Survey

2021

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We computed the optical properties of a large set of molecular crystals (∼2200 structures) composed of molecules whose lowest excited states are strongly coupled and generate wide excitonic bands. Such bands are classified in terms of their dimensionality (1-, 2-, and 3-dimensional), the position of the optically allowed state in relation with the excitonic density of states, and the presence of Davydov splitting. The survey confirms that one-dimensional aggregates are rare in molecular crystals highlighting the need to go beyond the simple low-dimensional models. Furthermore, this large set of data is used to search for technologically interesting and less common properties. For instance, we considered the largest excitonic bandwidth that is achievable within known molecular crystals and identified materials with strong super-radiant states. Finally, we explored the possibility that strong excitonic coupling can be used to generate emissive states in the near-infrared region in materials formed by molecules with bright visible absorption and we could identify the maximum allowable red shift in this material class. These insights with the associated searchable database provide practical guidelines for designing materials with interesting optical properties.

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Brickstone arrangement in J-aggregates on an amphiphilic merocyanine dye

Cited by 61 publications

References 17 publications

Molecular Arrangements in Two-Dimensional J-Aggregate Monolayers of Cyanine Dyes

Molecular Arrangements in Two-Dimensional J-Aggregate Monolayers of Cyanine Dyes

A quantum dynamical comparison of the electronic couplings derived from quantum electrodynamics and Förster theory: application to 2D molecular aggregates

Bright Frenkel Excitons in Molecular Crystals: A Survey

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