Lemniscular carbon nanohoops with contiguous conjugation from planar chiral [2.2]paracyclophane: influence of the regioselective synthesis on topological chirality.
Lemniscular carbon nanohoops with contiguous conjugation from planar chiral [2.2]paracyclophane: influence of the regioselective synthesis on topological chirality.
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DOI:
10.1039/d2sc06825g
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发表时间:
2023-04-26
期刊:
影响因子:
8.4
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中科院分区:
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We report herein the regioselective synthesis of all-carbon lemniscular nanohoops bis-po-CC and bis-pm-TC by the rational control of ring closures at the different positions of planar chiral tetrasubstituted [2.2]paracyclophane. Topological analyses reveal that bis-pm-TC is topologically chiral while bis-po-CC is topologically achiral. X-ray crystal analysis demonstrates that bis-pm-TC adopts a lemniscular conformation with a contiguous conjugation. CD and CPL measurements further reveal that the chiroptical properties of bis-pm-TC are obviously different from those of bis-po-CC due to their different topological chiralities. We report herein two lemniscular carbon nanohoops bis-po-CC and bis-pm-TC with contiguous conjugation from planar chiral [2.2]paracyclophane, and elucidate the influence of the regioselective synthesis on their topological chirality.
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DOI:
10.1002/anie.201702531
发表时间:
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期刊:
Angewandte Chemie (International ed. in English)
影响因子:
--
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通讯作者:
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影响因子:
16.6
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Angewandte Chemie (International ed. in English)
影响因子:
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