Push–Pull-Type Polychlorotriphenylmethyl Radicals

New Two-Photon Absorbers and Dyes for Generation of Photo-Charges

Xiaojin Wu, Jun Oh Kim, Samara Medina, Francisco J. Ramírez, Paula Mayorga Burrezo, Shaofei Wu, Zheng Long Lim, Christoph Lambert, Juan Casado, Dongho Kim, Jishan Wu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Tri(4-iodo-2,3,5,6-tetrachlorophenyl)methane (2) is reported as a general building block for the synthesis of various π-conjugated polychlorotriphenylmethyl (PTM) radicals. Three push–pull-type triphenylamine-substituted PTM radicals with different substitution patterns were prepared and all exhibited intense inter-valence charge-transfer bands and large two-photon absorption (TPA) cross sections. Moreover, increase of solvent polarity also resulted in improved TPA response. The charge-transfer character of the relevant excited states provoked the efficient photo-generation of charges, anions in the PTM and cations in the amine arms, driven by the amphoteric redox character and the small coupling between donor and acceptor.

Original languageEnglish
Pages (from-to)7698-7702
Number of pages5
JournalChemistry - A European Journal
Volume23
Issue number32
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Charge transfer
Coloring Agents
Photons
Dyes
Methane
Excited states
Amines
Anions
Cations
Substitution reactions
Negative ions
Positive ions
Oxidation-Reduction

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Organic Chemistry

Cite this

Wu, Xiaojin ; Kim, Jun Oh ; Medina, Samara ; Ramírez, Francisco J. ; Mayorga Burrezo, Paula ; Wu, Shaofei ; Lim, Zheng Long ; Lambert, Christoph ; Casado, Juan ; Kim, Dongho ; Wu, Jishan. / Push–Pull-Type Polychlorotriphenylmethyl Radicals : New Two-Photon Absorbers and Dyes for Generation of Photo-Charges. In: Chemistry - A European Journal. 2017 ; Vol. 23, No. 32. pp. 7698-7702.
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abstract = "Tri(4-iodo-2,3,5,6-tetrachlorophenyl)methane (2) is reported as a general building block for the synthesis of various π-conjugated polychlorotriphenylmethyl (PTM) radicals. Three push–pull-type triphenylamine-substituted PTM radicals with different substitution patterns were prepared and all exhibited intense inter-valence charge-transfer bands and large two-photon absorption (TPA) cross sections. Moreover, increase of solvent polarity also resulted in improved TPA response. The charge-transfer character of the relevant excited states provoked the efficient photo-generation of charges, anions in the PTM and cations in the amine arms, driven by the amphoteric redox character and the small coupling between donor and acceptor.",
author = "Xiaojin Wu and Kim, {Jun Oh} and Samara Medina and Ram{\'i}rez, {Francisco J.} and {Mayorga Burrezo}, Paula and Shaofei Wu and Lim, {Zheng Long} and Christoph Lambert and Juan Casado and Dongho Kim and Jishan Wu",
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Wu, X, Kim, JO, Medina, S, Ramírez, FJ, Mayorga Burrezo, P, Wu, S, Lim, ZL, Lambert, C, Casado, J, Kim, D & Wu, J 2017, 'Push–Pull-Type Polychlorotriphenylmethyl Radicals: New Two-Photon Absorbers and Dyes for Generation of Photo-Charges', Chemistry - A European Journal, vol. 23, no. 32, pp. 7698-7702. https://doi.org/10.1002/chem.201701875

Push–Pull-Type Polychlorotriphenylmethyl Radicals : New Two-Photon Absorbers and Dyes for Generation of Photo-Charges. / Wu, Xiaojin; Kim, Jun Oh; Medina, Samara; Ramírez, Francisco J.; Mayorga Burrezo, Paula; Wu, Shaofei; Lim, Zheng Long; Lambert, Christoph; Casado, Juan; Kim, Dongho; Wu, Jishan.

In: Chemistry - A European Journal, Vol. 23, No. 32, 01.01.2017, p. 7698-7702.

Research output: Contribution to journalArticle

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AU - Wu, Xiaojin

AU - Kim, Jun Oh

AU - Medina, Samara

AU - Ramírez, Francisco J.

AU - Mayorga Burrezo, Paula

AU - Wu, Shaofei

AU - Lim, Zheng Long

AU - Lambert, Christoph

AU - Casado, Juan

AU - Kim, Dongho

AU - Wu, Jishan

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