Details
| Original language | English |
|---|---|
| Pages (from-to) | 5434-5438 |
| Number of pages | 5 |
| Journal | Chemistry - a European journal |
| Volume | 23 |
| Issue number | 23 |
| Publication status | Published - 24 Apr 2017 |
Abstract
Stimuli-responsive molecules change their properties when exposed to external signals, such as light, and enable the preparation of smart materials. UV light, which often destroys organic materials, is typically required for activating the desired response of photoswitchable compounds, significantly limiting the potential applications of light-operated smart materials. Herein, we present the first metal–organic framework (MOF), which enables reversible modulation of key properties upon irradiation with visible light only. The fluorinated azobenzene side groups in the MOF structure can be reversibly switched between the trans and cis state by green and violet light, avoiding UV light. It was demonstrated that the uptake of guest molecules by these MOF films can be switched in a fully remote-controlled way. The membrane separation of hydrogen/hydrocarbon mixtures was investigated. The light-induced changes of the MOF pore size result in the switching of the permeation and of the selection factor.
Keywords
- membrane separation, metal–organic frameworks, photoswitching, remote control, thin films
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- Organic Chemistry
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: Chemistry - a European journal, Vol. 23, No. 23, 24.04.2017, p. 5434-5438.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Switching Thin Films of Azobenzene-Containing Metal–Organic Frameworks with Visible Light
AU - Müller, Kai
AU - Knebel, Alexander
AU - Zhao, Fangli
AU - Bléger, David
AU - Caro, Jürgen
AU - Heinke, Lars
N1 - Funding Information: We gratefully acknowledge Dr. Aurelio Bonasera for performing the DFT calculations. K.M. and D.B. acknowledge the financial support from the German Research Foundation (DFG; SFB 1176-C6 and BL 1269/1-1). This work is part of the DFG priority program SPP1928 (Ca147/20-1). L.H. gratefully acknowledges funding by the Volkswagen Foundation and the Fonds der Chemischen Industrie.
PY - 2017/4/24
Y1 - 2017/4/24
N2 - Stimuli-responsive molecules change their properties when exposed to external signals, such as light, and enable the preparation of smart materials. UV light, which often destroys organic materials, is typically required for activating the desired response of photoswitchable compounds, significantly limiting the potential applications of light-operated smart materials. Herein, we present the first metal–organic framework (MOF), which enables reversible modulation of key properties upon irradiation with visible light only. The fluorinated azobenzene side groups in the MOF structure can be reversibly switched between the trans and cis state by green and violet light, avoiding UV light. It was demonstrated that the uptake of guest molecules by these MOF films can be switched in a fully remote-controlled way. The membrane separation of hydrogen/hydrocarbon mixtures was investigated. The light-induced changes of the MOF pore size result in the switching of the permeation and of the selection factor.
AB - Stimuli-responsive molecules change their properties when exposed to external signals, such as light, and enable the preparation of smart materials. UV light, which often destroys organic materials, is typically required for activating the desired response of photoswitchable compounds, significantly limiting the potential applications of light-operated smart materials. Herein, we present the first metal–organic framework (MOF), which enables reversible modulation of key properties upon irradiation with visible light only. The fluorinated azobenzene side groups in the MOF structure can be reversibly switched between the trans and cis state by green and violet light, avoiding UV light. It was demonstrated that the uptake of guest molecules by these MOF films can be switched in a fully remote-controlled way. The membrane separation of hydrogen/hydrocarbon mixtures was investigated. The light-induced changes of the MOF pore size result in the switching of the permeation and of the selection factor.
KW - membrane separation
KW - metal–organic frameworks
KW - photoswitching
KW - remote control
KW - thin films
UR - http://www.scopus.com/inward/record.url?scp=85017336588&partnerID=8YFLogxK
U2 - 10.1002/chem.201700989
DO - 10.1002/chem.201700989
M3 - Article
C2 - 28370503
AN - SCOPUS:85017336588
VL - 23
SP - 5434
EP - 5438
JO - Chemistry - a European journal
JF - Chemistry - a European journal
SN - 0947-6539
IS - 23
ER -