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Maximizing Photoresponsive Efficiency by Isolating Metal-Organic Polyhedra into Confined Nanoscaled Spaces
- Maximizing Photoresponsive Efficiency by Isolating Metal-Organic Polyhedra into Confined Nanoscaled Spaces
- Jiang, Yao; Park, Jinhee; Tan, Peng; Feng, Liang; Liu, Xiao-Qin; Sun, Lin-Bing; Zhou, Hong-Cai
- DGIST Authors
- Park, Jinhee
- Issue Date
- Journal of the American Chemical Society, 141(20), 8221-8227
- Article Type
- MESOPOROUS SILICA; GAS-ADSORPTION; CAPTURE; RELEASE; DESIGN; SITES; CO2; SEPARATION; FRAMEWORKS; CATALYSIS
- Photoresponsive metal-organic polyhedra (PMOPs) have attracted expanding interests due to their modular nature with tunable functionality and variable responsive behaviors tailored conveniently by external-stimulus. However, their photoresponsive efficiency is often compromised after activation because of desorption-triggered aggregation into bulk PMOPs, which limits their utility in stimuli-responsive applications. Here, we report a case system that can overcome the aggregation problem and achieve maximized photoresponsive efficiency by polyhedral isolation in the nanoscaled spaces of mesoporous silica (MS). Through confinement, amount-controllable PMOPs are well dispersed in the nanoscaled spaces of MS, avoiding aggregation that commonly takes places in bulk PMOPs. Furthermore, reversible trans/cis isomerization of photoresponsive groups can be realized freely during ultraviolet/visible light irradiation, maximizing control over photoresponsive guest adsorption behaviors. Remarkably, after trans/cis isomerization, the confined PMOP-1 shows 48.2% of change in adsorption amount for propene with small molecular size and 43.9% for brilliant blue G (BBG) with large molecular size, which is significantly higher than that over bulk PMOP-1 with 11.2% for propene and 7.8% for BBG, respectively. Therefore, our work paves a way for the design and construction of multifunctional composite materials toward efficient stimuli-responsive needs.
- American Chemical Society
- Related Researcher
Organic-Inorganic Hybrids Lab
Organic-Inorganic Hybrid Materials; Metal-Organic Polyheda;Metal-Organic Frameworks; Porous Polymer Networks
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- Department of Emerging Materials ScienceOrganic-Inorganic Hybrids Lab1. Journal Articles
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