Macrocyclic Restriction with Flexible Alkylene Linkers: A Simple Strategy to Control the Solid‐State Properties of π‐Conjugated Systems

Saito, Shohei; Nakakura, Ken; Yamaguchi, Shigehiro

doi:10.1002/anie.201107172

Cited by 31 publications

(29 citation statements)

References 47 publications

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“…According to the literature, the longest lifetime is attributed to emissions from the excimers, which are formed at an intermolecular distance being 4-7Å. 10,11 The uorescence decay data suggest that without DEAB, most TTC4L molecules in the precipitates are in the form of excimers (41.1%), while those in the form of aggregates and monomers are 31.2%, 27.7%, respectively. 7,8 The shortest lifetime belongs to the monomers dispersed in the molecular state in the system.…”

Section: Resultsmentioning

confidence: 96%

One platform solid multicolour emission of terthiophene compounds controlled by mixed self-assembly

et al. 2015

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Via the mixed self-assembling procedure, solid multicolour emission materials based on an amphiphilic terthiophene compound are obtained from a unimolecular platform. Upon controlling the concentration of the cationic surfactant dodecyltriethyl ammonium bromide (DEAB) in the precipitate-monomer equilibrium system of the terthiophene compound TTC4L, mixed self-assembly of TTC4L-DEAB results in diverse structures (including plates, spheres, and needles) with different emission colours. The multicolour emissions are triggered by the different distances between the terthiophene groups in these mixed self-assemblies. Each distance corresponds to a specific molecular state of terthiophene groups, so that emissions corresponding to the monomers, excimers, and aggregates are obtained. Upon variation of the ratio of DEAB and TTC4L, the relative fraction of emissions corresponding to the monomers, excimers, and aggregates of TTC4L changes. This approach may act as a simple method to control the stacking mode of the oligothiophene group which is anticipated to realize unimolecular-platform multicolour emissions.

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Section: Resultsmentioning

confidence: 96%

One platform solid multicolour emission of terthiophene compounds controlled by mixed self-assembly

et al. 2015

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“…4b, the fraction of TTC4L in these domains is about 49%. We believe that such 'aggregated TTC4L' is probably a result of irregular overlap of the terthiophene groups in the micellar core, which leads to [4][5][6][7] A separations between the terthiophene groups. This allows for the formation of excimers, and a green emission occurs.…”

Section: Molecular Mechanism Of the Multiple Color Emissionsmentioning

confidence: 99%

“…7,[21][22][23][24][25] Moreover, the oligothiophenes exhibit unique versatile emissions depending on the intermolecular distance. [26][27][28] If the distance between the terthiophene groups is around [3][4] A, p-p stacking may occur which allows a blue emission; 27,29 when the distance is increased to [4][5][6][7] A, one may obtain green emissions from the excimers. 26,30 At distances larger than 7 A, there will be no interaction between the terthiophene groups so that one obtains a violet emission from the monomers.…”

Section: Introductionmentioning

confidence: 99%

A surfactant-assisted unimolecular platform for multicolor emissions

et al. 2012

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We present here a simple molecular assembly approach to multicolor emissions based on a unimolecular platform of a terthiophene-containing amphiphile TTC4L. The amphiphiles selfassemble into vesicles in solution which exhibit a blue emission. Upon controlling the distance between the fluorescent terthiophene groups by transformation of the self-assembly of TTC4L molecules into their co-assembly with surfactants, the color of the emissions can be continuously tailored which covers most of the visible region. Since the multi-colors were obtained without any structural modification on the fluorescent molecules, we have demonstrated a real unimolecular platform for fabricating multicolor emissions. In contrast, only dual emissions can be obtained from TTC4L using host-guest chemistry. As a simple approach of 'tunable emissions', this surfactant-assisted unimolecular platform opens a new vista for the application of molecular assemblies in advanced light emitting materials.

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“…[20][21] More and more studies have demonstrated the length of the π bridge, the number, length, branching and position of the side alkyl chains can have significant influence on the optical, crystal, electronic properties and device performance of the photovoltaic materials. [27][28][29][30][31][32][33][34][35][36][37] For example, Prof. Wong' s group published a range of works studying the effect of the various side chain on the photovoltaic properties, the photovoltaic properties of the materials make big difference even a small change from the oxygen atom to sulphur atom in the side chain. [38][39][40][41][42][43][44] In previous work, we report four A-D-A molecules based on bithienyl-substituted benzodithiophene (BDT) and indenedione (ID) unit.…”

Section: Introductionmentioning

confidence: 99%

Impact of the alkyl side chain position on the photovoltaic properties of solution-processable organic molecule donor materials

Zhang

Zhu

et al. 2016

J. Mater. Chem. A

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Macrocyclic Restriction with Flexible Alkylene Linkers: A Simple Strategy to Control the Solid‐State Properties of π‐Conjugated Systems

Cited by 31 publications

References 47 publications

One platform solid multicolour emission of terthiophene compounds controlled by mixed self-assembly

One platform solid multicolour emission of terthiophene compounds controlled by mixed self-assembly

A surfactant-assisted unimolecular platform for multicolor emissions

Impact of the alkyl side chain position on the photovoltaic properties of solution-processable organic molecule donor materials

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