Mixed-Valence Superstructure Assembled from a Mixed-Valence Host-Guest Complex

Zhichang Liu; Marco Frasconi; Wei Guang Liu; Yu Zhang; Scott M. Dyar; Dengke Shen; Amy A. Sarjeant; William A. Goddard; Michael R. Wasielewski; J. Fraser Stoddart

doi:10.1021/jacs.8b05322

Mixed-Valence Superstructure Assembled from a Mixed-Valence Host-Guest Complex

Zhichang Liu^*, Marco Frasconi, Wei Guang Liu, Yu Zhang, Scott M. Dyar, Dengke Shen, Amy A. Sarjeant, William A. Goddard, Michael R. Wasielewski, J. Fraser Stoddart

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Herein, we report an unprecedented mixed-valence crystal superstructure that consists of a 2:1 host-guest complex [MV⊂(CBPQT)₂]^2/3+ [MV = methyl viologen, CBPQT = cyclobis(paraquat-p-phenylene)]. One electron is distributed statistically between three [MV⊂(CBPQT)₂]^•+ composed of a total of 15 viologen units. The mixed-valence state is validated by single-crystal X-ray crystallography, which supports an empirical formula of [MV⊂(CBPQT)₂]₃·(PF₆)₂ for the body-centered cubic superstructure. Electron paramagnetic resonance provides further evidence of electron delocalization. Quantum chemistry calculations confirm the mixed-valence state in the crystal superstructure. Our findings demonstrate that precise tuning of the redox states in host-guest systems can lead to a promising supramolecular strategy for achieving long-range electron delocalization in solid-state devices.

Original language	English (US)
Pages (from-to)	9387-9391
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	140
Issue number	30
DOIs	https://doi.org/10.1021/jacs.8b05322
State	Published - Aug 1 2018

ASJC Scopus subject areas

Catalysis
Chemistry(all)
Biochemistry
Colloid and Surface Chemistry

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@article{b3fe58a06833483c981d83182f29a03e,

title = "Mixed-Valence Superstructure Assembled from a Mixed-Valence Host-Guest Complex",

abstract = "Herein, we report an unprecedented mixed-valence crystal superstructure that consists of a 2:1 host-guest complex [MV⊂(CBPQT)2]2/3+ [MV = methyl viologen, CBPQT = cyclobis(paraquat-p-phenylene)]. One electron is distributed statistically between three [MV⊂(CBPQT)2]•+ composed of a total of 15 viologen units. The mixed-valence state is validated by single-crystal X-ray crystallography, which supports an empirical formula of [MV⊂(CBPQT)2]3·(PF6)2 for the body-centered cubic superstructure. Electron paramagnetic resonance provides further evidence of electron delocalization. Quantum chemistry calculations confirm the mixed-valence state in the crystal superstructure. Our findings demonstrate that precise tuning of the redox states in host-guest systems can lead to a promising supramolecular strategy for achieving long-range electron delocalization in solid-state devices.",

author = "Zhichang Liu and Marco Frasconi and Liu, {Wei Guang} and Yu Zhang and Dyar, {Scott M.} and Dengke Shen and Sarjeant, {Amy A.} and Goddard, {William A.} and Wasielewski, {Michael R.} and Stoddart, {J. Fraser}",

year = "2018",

month = aug,

day = "1",

doi = "10.1021/jacs.8b05322",

language = "English (US)",

volume = "140",

pages = "9387--9391",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

number = "30",

}

Mixed-Valence Superstructure Assembled from a Mixed-Valence Host-Guest Complex. / Liu, Zhichang; Frasconi, Marco; Liu, Wei Guang; Zhang, Yu; Dyar, Scott M.; Shen, Dengke; Sarjeant, Amy A.; Goddard, William A.; Wasielewski, Michael R.; Stoddart, J. Fraser.

In: Journal of the American Chemical Society, Vol. 140, No. 30, 01.08.2018, p. 9387-9391.

Research output: Contribution to journal › Article › peer-review

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AU - Frasconi, Marco

AU - Liu, Wei Guang

AU - Zhang, Yu

AU - Dyar, Scott M.

AU - Shen, Dengke

AU - Sarjeant, Amy A.

AU - Goddard, William A.

AU - Wasielewski, Michael R.

AU - Stoddart, J. Fraser

PY - 2018/8/1

Y1 - 2018/8/1

N2 - Herein, we report an unprecedented mixed-valence crystal superstructure that consists of a 2:1 host-guest complex [MV⊂(CBPQT)2]2/3+ [MV = methyl viologen, CBPQT = cyclobis(paraquat-p-phenylene)]. One electron is distributed statistically between three [MV⊂(CBPQT)2]•+ composed of a total of 15 viologen units. The mixed-valence state is validated by single-crystal X-ray crystallography, which supports an empirical formula of [MV⊂(CBPQT)2]3·(PF6)2 for the body-centered cubic superstructure. Electron paramagnetic resonance provides further evidence of electron delocalization. Quantum chemistry calculations confirm the mixed-valence state in the crystal superstructure. Our findings demonstrate that precise tuning of the redox states in host-guest systems can lead to a promising supramolecular strategy for achieving long-range electron delocalization in solid-state devices.

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