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2 article(s) from Mason, Christopher R

Sexithiophenes as efficient luminescence quenchers of quantum dots

Christopher R. Mason,
Yang Li,
Paul O’Brien,
Neil J. Findlay and
Peter J. Skabara

Beilstein J. Org. Chem. 2011, 7, 1722–1731, doi:10.3762/bjoc.7.202

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Graphical Abstract

Figure 1: Dimethylaminophenylene end-capped sexithiophenes 1a and 1b, and dialkyl end-capped sexithiophenes 2a...

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Scheme 1: The synthesis of functionalised oligothiophenes 1a,b and 2a,b. Reagents and conditions: a) NBS, CH₃...

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Figure 2: Solid-state voltammograms of 1b and 2b, as spin-coated films on ITO glass, versus Ag/AgCl reference...

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Figure 3: Absorption spectra in solution (dichloromethane) and solid state.

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Figure 4: UV–visible spectroelectrochemical measurements of 1b (left) and 2b (right) drop-cast onto ITO glass....

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Figure 5: Absorption spectra for 1b and 2b, together with the absorption and emission profiles for the CdSe(Z...

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Figure 6: The absorption spectra of increasing sexithiophene concentration with HDA capped CdSe(ZnS) quantum ...

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Figure 7: Photoluminescence quenching experiments; the effect of increasing sexithiophene concentration with ...

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Published 22 Dec 2011

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Redox-active tetrathiafulvalene and dithiolene compounds derived from allylic 1,4-diol rearrangement products of disubstituted 1,3-dithiole derivatives

Filipe Vilela,
Peter J. Skabara,
Christopher R. Mason,
Thomas D. J. Westgate,
Asun Luquin,
Simon J. Coles and
Michael B. Hursthouse

Beilstein J. Org. Chem. 2010, 6, 1002–1014, doi:10.3762/bjoc.6.113

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Figure 1: Chemical structures of compounds 1–3.

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Scheme 1: Acid-catalysed behaviour of 4,5-bis(2-arylhydroxymethyl)-1,3-dithiole-2-thiones 2.

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Scheme 2: The proposed mechanism for the formation of 3.

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Scheme 3: The proposed mechanism for the decomposition of 13 in the presence of perchloric acid.

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Figure 2: Generalised structure of diol 17.

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Scheme 4: Reagents and conditions: (i) LDA (1 equiv), 2,4-dimethoxybenzaldehyde (1 equiv), then repeat, −78 °...

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Scheme 5: Reagents and conditions: (i) ethylenediamine, AcOH, MeOH; (ii) P(OEt)₃, 120 °C, 3 h.

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Figure 3: Molecular structure and numbering scheme of compound 22 with Hs omitted.

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Scheme 6: Reagents and conditions: (i) P(OEt)₃, reflux; (ii) Hg(OAc)₂, CH₂Cl₂/AcOH; (iii) NaOEt, THF, reflux,...

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Figure 4: Molecular structure of 28 with the tetrabutylammonium cation omitted.

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Figure 5: Packing diagram of 28 identifying close intermolecular contacts.

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Figure 6: UV–visible spectra of 3, 25, 27 and 28 in CH₂Cl₂ solution.

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Figure 7: Cyclic voltammograms of compounds 3, 25, 27, and 28. Glassy carbon working electrode, using Pt wire...

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Published 21 Oct 2010

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