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The square hole for the round peg: The first two members of a new family of tetrametallic cyclophanes (1; M=MnI, ReI), which feature rectangular cavities, have been synthesized and characterized. Both of the luminescent compounds behave as mesoporous materials in a thin film and display high capacities and substantial affinities towards the uptake of selected volatile organic compounds.
Benkstein et al. (Fri,) studied this question.