The Role of Electronic Coupling in Linear Porphyrin Arrays Probed by Single‐Molecule Fluorescence Spectroscopy

Yang, Jaesung; Lee, Ji Eun; Lee, Chang Yeon; Aratani, Naoki; Osuka, Atsuhiro; Hupp, Joseph T.; Kim, Dongho

doi:10.1002/chem.201100236

Cited by 14 publications

(16 citation statements)

References 52 publications

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“…Thus, we conclude that the intramolecular rotation of Z2B through the butadiyne linkage in the excited state does not occur due to tight fixing of Z2B molecules in the PMMA polymer matrix. 17…”

Section: Time-resolved Fluorescence Decaymentioning

confidence: 99%

Single-molecule fluorescence dynamics of a butadiyne-linked porphyrin dimer: the effect of conformational flexibility in host polymers

2012

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We have investigated the single-molecule fluorescence dynamics of a butadiyne-linked porphyrin dimer (Z2B) depending on the density of the poly(methyl methacrylate) (PMMA) matrix (5, 10, 25, and 50 mg ml(-1)). By recording single-molecule fluorescence intensity trajectories and fluorescence lifetimes, we observed more frequent one-step photobleaching behavior, less frequent on-off behavior, and narrower fluorescence lifetime distributions in lower densities of PMMA polymer. In contrast, more enhanced photostability was observed in higher densities of PMMA polymer. These results are explained by a difference in the molecular surroundings depending on the change in PMMA polymer density, suggesting that the individual photophysical properties of Z2B are strongly associated with their conformations and molecular surroundings in the solid state. Our studies will provide further information on the structure/surroundings relationship of single molecules in the solid state.

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Section: Time-resolved Fluorescence Decaymentioning

confidence: 99%

Single-molecule fluorescence dynamics of a butadiyne-linked porphyrin dimer: the effect of conformational flexibility in host polymers

2012

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“…The negatively charged TPP-SO3Na moieties aggregated on the GO surface do not allow close interaction between GO sheets due to anionic electrostatic repulsion, thereby increasing the stability of the suspension. 176 Fig. 18 Schematic representation of porphyrin trapping on a graphene layer.…”

Section: Porphyrin-graphene Hybridsmentioning

confidence: 99%

Review of Conjugated Porphyrin Systems

S.¹,

Hegde²

2020

Preprint

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Porphyrin macromolecules play critical roles in many natural processes. Studies are going on to mimic their role in natural systems and use them in various applications in artificial systems. When a porphyrin moiety is conjugated with carbon nanoallotropes, viz., carbon nanomaterials, carbon nanotubes, carbon nanospheres, etc., the hybrid molecules show optimized properties compared to the pristine molecules. In this review, various mechanisms of conjugating carbon nanoallotropes/carbon nanomaterials and porphyrins through stable chemical bond formation are discussed. The non-covalent interactions which cause their aggregation without disrupting their electronic structures are also discussed. This review also gives vital information on the utilization of conjugated systems effectively for society oriented applications.________________________________________

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“…The excited dye molecule then injects an electron to the surface of the TiO2 nanocrystalline particles, either spontaneously or after relaxation. Radiation relaxation of the excited dye, in addition to the possible recombination of injected electrons with the oxidized dye, can reduce the performance of the DSSC [59], [60]. The injected electrons subsequently transfer by diffusion through the TiO2 film to the external electric circuit.…”

Section: Sensitization Mechanismmentioning

confidence: 99%

Review of Molecular Modeling and Photoelectronic Applications of Porphyrin-based Materials

Mogren¹,

M.Ahmed²,

A.Hasanein³

2020

Preprint

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In this review, the introduction of solar cells is presented. Old and new generation solar cells are briefly described. Quantum dot solar cells (QDSCs), perovskite solar cells, and dye-sensitized solar cells (DSSCs) are concisely introduced. The sensitization mechanism in DSSCs is discussed in detail concerning the spectral and electron injection properties of different dyes. An analysis of the intramolecular charge transfer process in the excited dye molecule is also provided. The use of porphyrin-based dyes as sensitizers in DSSCs is then reviewed. The design, synthesis, and photovoltaic application of a wide variety of porphyrin-based dyes as well as porphyrin dyads are presented and discussed. Theoretical studies of the spectral and electronic properties of different porphyrin-based dyes using DFT and TD-DFT methods are described. The different possibilities for improving the light-to-electrical energy conversion performance are discussed, such as structural modifications through introducing push-pull moieties, which in turn tunes the HOMO-LUMO energy gap of the sensitizing dye used in the DSSC. Experimental, as well as theoretical calculations of adsorption energies of the sensitizing dyes, are crucial for predicting the relative performance and efficiency of the dyes.

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The Role of Electronic Coupling in Linear Porphyrin Arrays Probed by Single‐Molecule Fluorescence Spectroscopy

Cited by 14 publications

References 52 publications

Single-molecule fluorescence dynamics of a butadiyne-linked porphyrin dimer: the effect of conformational flexibility in host polymers

Single-molecule fluorescence dynamics of a butadiyne-linked porphyrin dimer: the effect of conformational flexibility in host polymers

Review of Conjugated Porphyrin Systems

Review of Molecular Modeling and Photoelectronic Applications of Porphyrin-based Materials

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