Cationic fluorene-thiophene diblock copolymers: Aggregation behaviour in methanol/water and its relation to thin film structures

Gutacker, Andrea; Koenen, Nils; Scherf, Ullrich; Adamczyk, Sylwia; Pina, João; Fonseca, Sofia M.; Valente, Artur J.M.; Evans, Rachel C.; Melo, J. Sérgio Seixas de; Knaapila, Matti

doi:10.1016/j.polymer.2010.03.010

Cited by 32 publications

(53 citation statements)

References 34 publications

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“…Solvent tunability was also reported in the literature while most systems were of one-directional aggregation-nonaggregation inversion. 5,6,27 Very few were about the reversible aggregationnonaggregation-aggregation transition. 26,28,38 In addition, much greater solvent tunability, 65 nm wavelength shift and 10-fold intensity enhancement for emission maximum, were achieved in this PPESO 3 OR system, compared to 10 nm wavelength shift and 2-fold intensity enhancement for the polyfluorene system in H 2 O/THF reported by Bazan et al 26 Recently, Burrow et al reported another polyfluorene system with sulfonate side groups which also exhibited the aggregation-nonaggregation-aggregation transition in H 2 O/dioxane with about 15 nm wavelength shift.…”

Section: Resultsmentioning

confidence: 99%

Toward a Highly Sensitive Fluorescence Sensing System of an Amphiphilic Molecular Rod: Facile Synthesis and Significant Solvent-Assisted Photophysical Tunability

et al. 2011

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A conjugated polyelectrolyte with symmetrically assembled hydrophilic and hydrophobic side groups along the backbone has been successfully synthesized and demonstrated significant photophysical tunability with 65 nm of wavelength shift and 10-fold of intensity enhancement for the emission maximum, through solvent composition adjustment. The highest fluorescence quenching effect (I/I 0 = 148) toward 10 μM of Fe 3þ was achieved in the solution having a THF/H 2 O ratio of 30/70, which could be attributed to a delicate balance among the influencing factors for the fluorescence quenching systems, the initial fluorescence, the rate of energy migration, and the accessibility of the receptors. The amplified symmetrical aggregation-nonaggregation inversion and the asymmetrical cation sensitivity across the whole range of H 2 O/THF composition were consistent with the molecular design.

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Section: Resultsmentioning

confidence: 99%

Toward a Highly Sensitive Fluorescence Sensing System of an Amphiphilic Molecular Rod: Facile Synthesis and Significant Solvent-Assisted Photophysical Tunability

et al. 2011

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“…Scherf et al . have notably shown that amphiphilic conjugated block copolymers containing both hydrophobic polyfluorene and hydrophilic cationic P3HT blocks ( P5,Br ) (Scheme ) exhibit solvent‐ and charge‐mediated self‐assembly . Judicious selection of the polarity of the solvent mixture allows modulation of the nanomorphology of the self‐assembled aggregates (e.g.…”

Section: Molecular Design and Performance Of Polythiophene Il Materialsmentioning

confidence: 99%

Molecular design of interfacial layers based on conjugated polythiophenes for polymer and hybrid solar cells

Houston

Richeter

Clément

et al. 2017

Polymer International

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In the past two decades, bulk heterojunction organic photovoltaic (OPV) devices have emerged as attractive candidates for solar energy conversion due to their lightweight design and potential for low‐cost, high‐throughput, solution‐phase processability. Interfacial engineering is a proven efficient approach to achieve OPV devices with high power conversion efficiencies. This mini‐review provides an overview of the key structural considerations necessary when undertaking the molecular design of conjugated polyelectrolytes, for application as interfacial layers (ILs). The different roles of ILs are outlined, together with the advantages and disadvantages of competing classes of IL materials. Particular emphasis is placed on the design and synthesis of water‐soluble polythiophene‐based IL materials and the influence of their structural characteristics on their performance as a promising class of IL material. Finally, the challenges and opportunities for polythiophenes as IL materials for OPV devices and other solution‐processed solar cell technologies (e.g. perovskite solar cells) are discussed. © 2017 Society of Chemical Industry

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“…When in solid state, in addition to the intrachain energy transfer and charge transfer processes, interchain photophysical processes also play important roles due the possibility of polymer aggregation, a very common process in both polyfluorenes and polythiophenes [18][19][20][21][22][23][24][25][26][27]. In photoluminescence (PL), along with the emission of isolated chains, emission of aggregates may be possible in some cases, whereas in others the quenching of the emission is the most important process.…”

Section: )-9-octylfluorene)]-co-[bis(biphenyl-mentioning

confidence: 99%

Photo- and electroluminescence in a series of PPV type terpolymers containing fluorene, thiophene and phenylene units

Nowacki

Grova

Domingues

et al. 2012

Journal of Photochemistry and Photobiology A: Chemistry

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Cationic fluorene-thiophene diblock copolymers: Aggregation behaviour in methanol/water and its relation to thin film structures

Cited by 32 publications

References 34 publications

Toward a Highly Sensitive Fluorescence Sensing System of an Amphiphilic Molecular Rod: Facile Synthesis and Significant Solvent-Assisted Photophysical Tunability

Toward a Highly Sensitive Fluorescence Sensing System of an Amphiphilic Molecular Rod: Facile Synthesis and Significant Solvent-Assisted Photophysical Tunability

Molecular design of interfacial layers based on conjugated polythiophenes for polymer and hybrid solar cells

Photo- and electroluminescence in a series of PPV type terpolymers containing fluorene, thiophene and phenylene units

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