The construction of two novel interpenetrating diamondoid networks presenting unusual [3 + 2] and [4 + 4] modes

•Two novel entangled coordination polymers have been synthesized and characterized.•Compound 1 features a five-fold interpenetration of dia network in a [3 + 2] mode.•Compound 2 shows an eight-fold interpenetration of dia network in a [4 + 4] mode.

Two novel coordination polymers, [Co(1,4-ndc)(bipe)] (1), [Cd2(bdc)2(bipe)2]·2H2O (2) (bipe = bis(4-imidazolphenoxy)ethane, H2bdc = 1,4-benzenedicarboxylic acid and 1,4-H2ndc = naphthalene-1,4-dicarboxylic acid), have been synthesized and structurally characterized. Compound 1 features a five-fold interpenetration of dia network in a [3 + 2] mode. Compound 2 shows an eight-fold interpenetration of dia network in a [4 + 4] mode. In addition, compound 2 shows an emission at 435 nm when it was excitated at 332 nm.

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