Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 46, Pages 14545-14550Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201708246
Keywords
host-guest systems; molecular recognition; organic cages; self-assembly; white phosphorus
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Funding
- National Natural Science Foundation of China [21772173, 21532005, 21327010, 21325102]
- Zhejiang University
- Chinese Thousand Youth Talents Plan
- National Science Foundation [CHE-1402004]
- Robert A. Welch Foundation [F-0018]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1402004] Funding Source: National Science Foundation
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Three tetrahedral organic cages have been obtained by condensing a triamino linker with a set of three ostensibly analogous triformyl precursors. Despite the large number of imine bonds formed, the corresponding cages were obtained in exceptionally high yields. Both theory and experimental results demonstrate that intramolecular CH center dot center dot center dot pi interactions within all of the cage frameworks play an important role in abetting the condensations and contributing to the near-quantitative synthetic yields. The three cages of this study exhibit high thermodynamic and kinetic stability. A variety of small neutral guest molecules with complementary sizes and geometries may be used as templates in the cage forming reactions. Among the guests that may be used in this way is white phosphorus (P-4), whose inherent reactivity towards oxygen is almost fully attenuated when bound within one of the cages.
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