Photo-Driven Expulsion of Molecules from Mesostructured Silica Nanoparticles
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High Resolution Image Download MS PowerPoint Slide Azobenzene derivatives act as both impellers and gatekeepers when they are tethered in and on mesoporous silica nanoparticles. Continuous excitation at 457 nm, a wavelength where both the cis and trans conformers absorb, produces constant isomerization reactions and results in continual dynamic wagging of the untethered terminus. The 2 nm diameter pores are loaded with luminescent probe molecules, azobenzene motion is stimulated by light, and the photoinduced expulsion of the probe from the particles that is caused by the motion is monitored by luminescence spectroscopy. The light-responsive nature of these materials enables them to be externally controlled such that the expulsion of dye molecules from the mesopores can be started and stopped at will. These results open the possibilities of trapping useful molecules such as drugs and releasing them on demand.
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Azobenzenes attached to the interiors of inorganic subtract pores templated by surfactant can act as both impellers and gatekeepers.
“The azobenzenes attached to the interiors of the inorganic subtract pores templated by surfactant [507,508] can act as both impellers and gatekeepers [509,510].”
From A review of stimuli-responsive shape memory polymer composites (2013) · cites this paper as [510]
The Introduction says azobenzene derivatives act as both impellers and gatekeepers in and on mesoporous silica nanoparticles. It distinguishes their locations: the impeller is attached to pore interiors, while the gatekeeper is attached to pore openings. The claim's suggestion that azobenzenes attached to the interiors perform both roles is therefore not supported. (LLM, conf=0.88)
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Cited by
Sorted by citations
A review of stimuli-responsive shape memory polymer composites
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Self-citation
- Authors
- Angelos, S., Choi, E., Vögtle, F., De Cola, L., & Zink, J. I.
- Affiliations
- University of Bonn (DE)
- Department of Chemistry and Biochemistry, University of California Los Angeles, Los Angeles, California 90095, Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Strasse 1, D-53121 Bonn, Germany, and Westfälische Wilhelms-Universität Münster, Physikalisches Institut, Mendelstrasse 7, D-48149 Münster, Germany
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-04-18
- Volume
- 111
- Issue
- 18
- Pages
- 6589-6592
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W2093435984
- Cited by
- 227
- References
- 6
- Citations by year
- 2025: 4 · 2024: 2 · 2023: 3 · 2022: 3 · 2021: 7 · 2020: 7 · 2019: 8 · 2018: 17 · 2017: 7 · 2016: 11 · 2015: 21 · 2014: 15 · 2013: 25 · 2012: 24
- FWCI
- 10.86
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Journal of Physical Chemistry C (publishedVersion)
- Archivio Istituzionale della Ricerca (Universita Degli Studi Di Milano) (submittedVersion, other-oa)
- Funders
- National Science Foundation (0507929)
- Division of Materials Research
- Division of Chemistry
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Photochromic and Fluorescence Chemistry
- Physical Sciences › Materials Science › Materials Chemistry › Mesoporous Materials and Catalysis
- Physical Sciences › Chemistry › Organic Chemistry › Supramolecular Chemistry and Complexes
- Keywords
- azobenzene, mesoporous silica nanoparticles, photoisomerization, light-responsive drug delivery, cis-trans isomerization, on-demand drug release
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