Through careful consideration of charge matching, a simple replacement of metal ion from Cd(2+) to Ln(3+) in a building unit successfully transforms an anionic microporous framework into a series of isostructural porous neutral heterometallic frameworks [Cd(3)Ln(2)(btc)(4)(H(2)O)(6)(dmf)(4)]·x(solvent) (1; Ln=Tb, Eu, Nd, Gd, Sm, dmf=N,N'-dimethylformamide) by employing five different lanthanide ions. 1-Tb and 1-Eu exhibit interesting photoluminescent properties, and remarkably, 1-Tb can act as a luminescent sensor to identify organic solvents and metal ions.
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Yang et al. (2012) studied this question.
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