Abstract
Anionic Keggin polyoxometalates (POMs) and ether linkage-enriched ammonium ions spontaneously self-assemble into rectangular ultrathin nanosheets in aqueous media. The structural flexibility of the cation is essential to form oriented nanosheets; as demonstrated by single-crystal X-ray diffraction measurements. The difference in initial conditions exerts significant influence on selecting for self-assembly pathways in the energy landscape. Photoillumination of the POM sheets in pure water causes dissolution of reduced POMs, which allowed site-specific etching of nanosheets using laser scanning microscopy. By contrast, photoetching was suppressed in aqueous AgNO 3 and site-selective deposition of silver nanoparticles occurred as a consequence of electron transfer from the photoreduced POMs to Ag + ions on the nanosheet surface.
| Original language | English |
|---|---|
| Pages (from-to) | 2974-2978 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 56 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Jan 1 2017 |
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All Science Journal Classification (ASJC) codes
- Catalysis
- Chemistry(all)
Cite this
Photoresponsive Nanosheets of Polyoxometalates Formed by Controlled Self-Assembly Pathways. / Ishiba, Keita; Noguchi, Takao; Iguchi, Hiroaki; Morikawa, Masa-Aki; Kaneko, Kenji; Kimizuka, Nobuo.
In: Angewandte Chemie - International Edition, Vol. 56, No. 11, 01.01.2017, p. 2974-2978.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Photoresponsive Nanosheets of Polyoxometalates Formed by Controlled Self-Assembly Pathways
AU - Ishiba, Keita
AU - Noguchi, Takao
AU - Iguchi, Hiroaki
AU - Morikawa, Masa-Aki
AU - Kaneko, Kenji
AU - Kimizuka, Nobuo
PY - 2017/1/1
Y1 - 2017/1/1
N2 - Anionic Keggin polyoxometalates (POMs) and ether linkage-enriched ammonium ions spontaneously self-assemble into rectangular ultrathin nanosheets in aqueous media. The structural flexibility of the cation is essential to form oriented nanosheets; as demonstrated by single-crystal X-ray diffraction measurements. The difference in initial conditions exerts significant influence on selecting for self-assembly pathways in the energy landscape. Photoillumination of the POM sheets in pure water causes dissolution of reduced POMs, which allowed site-specific etching of nanosheets using laser scanning microscopy. By contrast, photoetching was suppressed in aqueous AgNO 3 and site-selective deposition of silver nanoparticles occurred as a consequence of electron transfer from the photoreduced POMs to Ag + ions on the nanosheet surface.
AB - Anionic Keggin polyoxometalates (POMs) and ether linkage-enriched ammonium ions spontaneously self-assemble into rectangular ultrathin nanosheets in aqueous media. The structural flexibility of the cation is essential to form oriented nanosheets; as demonstrated by single-crystal X-ray diffraction measurements. The difference in initial conditions exerts significant influence on selecting for self-assembly pathways in the energy landscape. Photoillumination of the POM sheets in pure water causes dissolution of reduced POMs, which allowed site-specific etching of nanosheets using laser scanning microscopy. By contrast, photoetching was suppressed in aqueous AgNO 3 and site-selective deposition of silver nanoparticles occurred as a consequence of electron transfer from the photoreduced POMs to Ag + ions on the nanosheet surface.
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U2 - 10.1002/anie.201612473
DO - 10.1002/anie.201612473
M3 - Article
VL - 56
SP - 2974
EP - 2978
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 11
ER -