Highly efficient electrogenerated chemiluminescence of an oligofluorene-truxene star-shaped compound incorporating 2,1,3-benzothiadiazole units

Mohsan, Zahera; Kanibolotsky, Alexander L.; Stewart, Alasdair J.; Inigo, Anto R.; Dennany, Lynn; Skabara, Peter J.

doi:10.1039/c4tc02638a

Cited by 28 publications

(21 citation statements)

References 34 publications

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“…This might be a consequence of a greater degree of aggregation of the molecules in concentrated solutions. However, self‐absorption could be partially responsible for the change in the luminescence spectra at higher luminophore concentration …”

Section: Resultsmentioning

confidence: 99%

“…However, selfabsorption could be partially responsible for the change in the luminescence spectra at higher luminophore concentration. 41 In contrast to the aforementioned hypsochromic shift in the absorption spectra, in hexane the emission occurs at slightly longer wavelengths for both compounds 4 and 5. A similar observation was made for the linear oligofluorene TPE compounds, with an increased planarization of the TPEcontaining molecules in the excited state in hexane solution being assumed.…”

Section: Articlementioning

confidence: 93%

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Fluorene‐containing tetraphenylethylene molecules as lasing materials

Orofino

Foucher

Farrell

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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A series of star‐shaped oligofluorene molecules, each containing a TPE core, have been specifically designed and produced to show effective aggregation‐induced emission (AIE). Each molecule differs either in the number of fluorene units within the arms (e.g., 1 or 4, compounds 4 and 5), or the terminal group positioned at the end of each arm (e.g., H, TMS, or TPA, compounds 4, 6, and 7). Although they are all poor emitters in solution phase they become efficient yellow‐green luminogens in the condensed state. Their AIE properties were investigated in THF/H2O mixtures, with each molecule exhibiting a clear emission enhancement at specific water contents. An all‐organic distributed feedback (DFB) laser was fabricated using compound 4 as the gain material and exhibited an average threshold energy fluence of 60 ± 6 μJ/cm2 and emission in the green region. Furthermore, piezofluorochromism studies on a thin film of this material displayed a linear dependence of the amplified spontaneous emission (ASE) peak position on applied pressure, indicating potential applications as lasing‐based pressure sensors. © 2016 The Authors. Journal of Polymer Science Part A: Polymer Chemistry Published by Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 734–746

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Section: Resultsmentioning

confidence: 99%

Section: Articlementioning

confidence: 93%

Fluorene‐containing tetraphenylethylene molecules as lasing materials

Orofino

Foucher

Farrell

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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“…[143,144] In 2015, Mohsan et al has reported that the oligofluorene-truxene with 2,1,3benzothiadazole moieties display excellent electrochemical activities with outstanding stability for both anion as well as cation radicals. [145] The high intense yellow emission is shown by 77 which are visible to the naked eye under normal conditions. The conjugated compound 77 with high luminescent nature, reversible multi-electron redox activities and the larger difference between~H ann (ion annihilation) and E s (singlet energy) leads to seven times high ECL efficiency as compared to 78.…”

Section: Use Of Truxenes In Organic Electronicsmentioning

confidence: 96%

“…In 2015, Mohsan et al. has reported that the oligofluorene‐truxene with 2,1,3‐benzothiadazole moieties display excellent electrochemical activities with outstanding stability for both anion as well as cation radicals . The high intense yellow emission is shown by 77 which are visible to the naked eye under normal conditions.…”

Section: Role Of Truxene System In Photocatalytic Processesmentioning

confidence: 99%

Functionalized Truxene Scaffold: A Promising Advanced Organic Material for Digital Era

2019

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Truxene and its congeners due to its structural, thermal, and optoelectronic properties, has recently became important not only in biological systems but also in the field of material and environmental sciences. The remarkable scope and its applicability ranging from sensory materials to photocatalysts and fluorescent probes, forces the scientific community to think about the design and construction of architecturally simple yet much powerful novel functional materials possessing the truxene scaffold(s) in their structures. Herein, we have focused to assemble a series of ground‐breaking achievements in recent years of truxene‐based functional materials with special emphasis on their applicability in material sciences and technology. We hope that the present review will boost the current scenario of truxene and its various domains.

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“…30,31 The multidimensional architecture of these macromolecular systems provides a unique stability of both p-and n-doped states with possible applications in electrogenerated chemiluminescence (ECL). 32,33 Incorporating electroactive units within the arms of the star-shaped molecule 34 creates the potential for multielectron redox properties, with the radical-ion located on each branch of the doped conjugated system, which can be used for the design of efficient emitters for ECL. 33 Herein, we highlight another strategy for the design of electroactive star-shaped oligofluorenes, where the TTF redox unit is positioned in the centre of the macromolecular conjugated system.…”

Section: Introductionmentioning

confidence: 99%