Journal
JOURNAL OF INCLUSION PHENOMENA AND MACROCYCLIC CHEMISTRY
Volume 72, Issue 3-4, Pages 247-262Publisher
SPRINGER
DOI: 10.1007/s10847-011-0027-2
Keywords
Pillar[5]arene; Host-guest complex; Polyrotaxane; Planar chirality; Functionality
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) [19750110, 21750140]
- Grants-in-Aid for Scientific Research [21750140, 19750110] Funding Source: KAKEN
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In 2008, we reported a new class of macrocyclic hosts and named Pillar[5]arenes. They combine the advantages and aspects of traditional hosts and have a composition similar to those of typical calix[n]arenes. Pillar[5]arenes have repeating units connected by methylene bridges at the para-position, and thus they have a unique symmetrical pillar architecture differing from the basket-shaped structure of meta-bridged calix[n]arenes. Pillar[5]arenes show high functionality similar to cyclodextrins, and can capture electron accepting guest molecules within their cavity similarly to cucurbit[n]urils. In this review, the synthesis, structure, rotation, host-guest properties, planar chirality and functionality of pillar[5]arenes are discussed, along with pillar[5]arene-based supramolecular architectures and the challenges in synthesizing pillar[6]arenes.
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