Novel Electron Donor Acceptor Nanocomposites

Imahori, Hiroshi; Guldi, Dirk M.; Fukuzumi, Shunichi

doi:10.1002/9780470660188.ch4

Chemistry of Nanocarbons 2010

DOI: 10.1002/9780470660188.ch4

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Novel Electron Donor Acceptor Nanocomposites

Hiroshi Imahori

Dirk M. Guldi

Shunichi Fukuzumi

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Cited by 2 publications

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Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li⁺@C₆₀ to Afford Efficient Photodriven Charge Separation

Supur

Kawashima

Larsen

et al. 2014

Chemistry A European J

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Inclusion complexes of benzo- and dithiabenzo-crown ether functionalized monopyrrolotetrathiafulvalene (MPTTF) molecules were formed with Li(+)@C60(1⋅Li(+)@C60 and 2⋅Li(+)@C60). The strong complexation has been quantified by high binding constants that exceed 10(6) M(-1) obtained by UV/Vis titrations in benzonitrile (PhCN) at room temperature. On the basis of DFT studies at the B3LYP/6-311G(d,p) level, the orbital interactions between the crown ether moieties and the π surface of the fullerene together with the endohedral Li(+) have a crucial role in robust complex formation. Interestingly, complexation of Li(+)@C60 with crown ethers accelerates the intersystem crossing upon photoexcitation of the complex, thereby yielding (3)(Li(+)@C60)*, when no charge separation by means of (1)Li(+)@C60* occurs. Photoinduced charge separation by means of (3)Li(+)@C60* with lifetimes of 135 and 120 μs for 1⋅Li(+)@C60 and 2⋅Li(+)@C60, respectively, and quantum yields of 0.82 in PhCN have been observed by utilizing time-resolved transient absorption spectroscopy and then confirmed by electron paramagnetic resonance measurements at 4 K. The difference in crown ether structures affects the binding constant and the rates of photoinduced electron-transfer events in the corresponding complex.

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Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li⁺@C₆₀ to Afford Efficient Photodriven Charge Separation

Supur

Kawashima

Larsen

et al. 2014

Chemistry A European J

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Selective Oxygenation by Electron Transfer

Ohkubo¹,

Fukuzumi²

2012

J. Synth. Org. Chem. Jpn.

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Novel Electron Donor Acceptor Nanocomposites

Cited by 2 publications

References 201 publications

Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li⁺@C₆₀ to Afford Efficient Photodriven Charge Separation

Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li⁺@C₆₀ to Afford Efficient Photodriven Charge Separation

Selective Oxygenation by Electron Transfer

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Novel Electron Donor Acceptor Nanocomposites

Cited by 2 publications

References 201 publications

Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li+@C60 to Afford Efficient Photodriven Charge Separation

Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li+@C60 to Afford Efficient Photodriven Charge Separation

Selective Oxygenation by Electron Transfer

Contact Info

Product

Resources

About

Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li⁺@C₆₀ to Afford Efficient Photodriven Charge Separation

Robust Inclusion Complexes of Crown Ether Fused Tetrathiafulvalenes with Li⁺@C₆₀ to Afford Efficient Photodriven Charge Separation