Ultra-Fast Molecular Rotors within Porous Organic Cages.

Ultra-Fast Molecular Rotors within Porous Organic Cages.
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DOI:
10.1002/chem.201704964
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发表时间:
2017-12-06
期刊:
Chemistry (Weinheim an der Bergstrasse, Germany)
影响因子:
--
通讯作者:
Blanc F
Blanc F
中科院分区:
其他
文献类型:
--
作者:
Hughes AR;Brownbill NJ;Lalek RC;Briggs ME;Slater AG;Cooper AI;Blanc F

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Using variable temperature 2H static NMR spectra and 13C spin‐lattice relaxation times (T1), we show that two different porous organic cages with tubular architectures are ultra‐fast molecular rotors. The central para‐phenylene rings that frame the “windows” to the cage voids display very rapid rotational rates of the order of 1.2–8×106 Hz at 230 K with low activation energy barriers in the 12–18 kJ mol−1 range. These cages act as hosts to iodine guest molecules, which dramatically slows down the rotational rates of the phenylene groups (5–10×104 Hz at 230 K), demonstrating potential use in applications that require molecular capture and release.
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