Potassium-thiacalix[8]arene assembly:structure and guest sorption profiles

摘要

Treatment of thiacalix[8]arene (3 centre dot 8H) with KH in THF,followed by recrystallization from methanol,affords an adduct of [K_4(3 centre dot 4H)] centre dot 8MeOH as a pale yellow crystal (4),which shows highly-extensive coordination that gives rise to a zeolitic structure.An adduct of 4 gives apohost [K4(3 centre dot 4H)] with the loss of methanol,which can adsorb such gaseous organic guest molecules as methanol and benzene.After binding methanol as the guest molecule,the apohost is converted back to the original structure of 4.