Charge Transfer Dynamics in Donor–Acceptor Complexes between a Conjugated Polymer and Fluorene Acceptors

Pavelyev, V.G.; Parashchuk, Olga D.; Krompiec, Michał; Orekhova, Tatyana V.; Perepichka, Igor F.; Loosdrecht, P.H.M. van; Paraschuk, Dmitry Yu.; Pshenichnikov, Maxim S.

doi:10.1021/jp510543c

Cited by 29 publications

(24 citation statements)

References 76 publications

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“…Overall, the exciton lifetime in BTT-TPP is considerably shorter than in PCPDTBT. Generally, the recombination rate is directly related to the bandgap of the material: a wider bandgap leads to slower recombination [27,51]. In BTT-DPP, the bandgap is~0.2 eV narrower as compared to PCPDTBT which is in line with faster recombination.…”

Section: Isotropic Transientsmentioning

confidence: 99%

“…In the pristine push-pull polymers, intramolecular formation of excitons and polaron pairs (or charge-transfer excitons with partial charge separation [26]) and their recombination take place simultaneously, with the branching ratio depending on the acceptor unit strength [27] and the distance between the donor and acceptor units [22]. In the mixtures with an external electron acceptor (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Ultrafast electron and hole transfer in bulk heterojunctions of low-bandgap polymers

Kozlov

Pavelyev

Gier

et al. 2016

Organic Photonics and Photovoltaics

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Section: Isotropic Transientsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ultrafast electron and hole transfer in bulk heterojunctions of low-bandgap polymers

Kozlov

Pavelyev

Gier

et al. 2016

Organic Photonics and Photovoltaics

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“…In recent times 2,4,7‐trinitrofluorenone ( 2 ) has come out as a very useful compound in different areas of Chemistry as well as its interdisciplinary areas. It has been utilized in catalyst recovery, synthesis of metal complexes, purification of gas oil, self‐assembly, synthesis of soft materials, etc. Earlier the strategy was to synthesize 2 from fluorenone via nitration using mixed acid .…”

Section: Resultsmentioning

confidence: 99%

2,4,7‐Triaminofluorenone as a Multi‐Analyte Colorimetric Sensor of Fluoride, Acetone Vapor, and Other Harmful Compounds

Mohar

2019

ChemistrySelect

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2,4,7‐Triaminofluorenone, a fluorenone derived multi‐analyte colorimetric chemosensor, has been synthesized via an extremely cost‐effective synthetic pathway. The sensor molecule can detect various analytes such as fluoride ion, acetone vapor, and picric acid. The violet solution of the sensor molecule becomes deep blue in the presence of fluoride ion. It can detect fluoride down to 120 ppb level. The compound in the solid state shows vapochromism only in the presence of acetone. The grey colored solid coating of the sensor molecule becomes blue in the presence of acetone vapor. This property was utilized to sense acetone vapor. Color Grab, an android based app, was utilized to detect acetone in real time down to 10 ppm level. Apart from that, the same sensor molecule was also tested for sensing different electron deficient nitro aromatic compounds due to its electron rich framework. The sensor was found to detect picric acid selectively. The sensor compound also shows acid‐base induced color change. The violet solution of the sensor molecule becomes brown in the presence of carboxylic as well as mineral acid. This reaction is reversible. Hence, the brown solution becomes violet again in the presence of aliphatic amines as well as ammonia. Utilizing this property, a method has been described to detect two widely used highly volatile chemicals HCl and NH3 in different industries.

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“…S3 in the ESI †). 25 Charge-transfer complexation of MEH-PPV and P3HT with small-molecule electron acceptors Fig. 3 shows the absorption spectra of MEH-PPV:AmCDTNF (a representative fluorene acceptor), MEH-PPV:DNAQ, MEH-PPV:TCNQ, and P3HT:TNFon blends in chlorobenzene.…”

Section: Dft Calculations Of Orbital Energies and Electron Affinitiesmentioning

confidence: 99%

Threshold-like complexation of conjugated polymers with small molecule acceptors in solution within the neighbor-effect model

Sosorev

Parashchuk

Zapunidi

et al. 2016

Phys. Chem. Chem. Phys.

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In some donor-acceptor blends based on conjugated polymers, a pronounced charge-transfer complex (CTC) forms in the electronic ground state. In contrast to small-molecule donor-acceptor blends, the CTC concentration in polymer:acceptor solution can increase with the acceptor content in a threshold-like way. This threshold-like behavior was earlier attributed to the neighbor effect (NE) in the polymer complexation, i.e., next CTCs are preferentially formed near the existing ones; however, the NE origin is unknown. To address the factors affecting the NE, we record the optical absorption data for blends of the most studied conjugated polymers, poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene) (MEH-PPV) and poly(3-hexylthiophene) (P3HT), with electron acceptors of fluorene series, 1,8-dinitro-9,10-antraquinone (), and 7,7,8,8-tetracyanoquinodimethane () in different solvents, and then analyze the data within the NE model. We have found that the NE depends on the polymer and acceptor molecular skeletons and solvent, while it does not depend on the acceptor electron affinity and polymer concentration. We conclude that the NE operates within a single macromolecule and stems from planarization of the polymer chain involved in the CTC with an acceptor molecule; as a result, the probability of further complexation with the next acceptor molecules at the adjacent repeat units increases. The steric and electronic microscopic mechanisms of NE are discussed.

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Charge Transfer Dynamics in Donor–Acceptor Complexes between a Conjugated Polymer and Fluorene Acceptors

Cited by 29 publications

References 76 publications

Ultrafast electron and hole transfer in bulk heterojunctions of low-bandgap polymers

Ultrafast electron and hole transfer in bulk heterojunctions of low-bandgap polymers

2,4,7‐Triaminofluorenone as a Multi‐Analyte Colorimetric Sensor of Fluoride, Acetone Vapor, and Other Harmful Compounds

Threshold-like complexation of conjugated polymers with small molecule acceptors in solution within the neighbor-effect model

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