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• W2017367304 abstract "Abstract Lanthanide coordination polymers {[Ln(PTMTC)(EtOH) 2 H 2 O] ⋅ x H 2 O, y EtOH} [Ln=Tb ( 1 ), Gd ( 2 ), and Eu ( 3 )] and {[Ln(αHPTMTC)(EtOH) 2 H 2 O] ⋅ x H 2 O, y EtOH} [Ln=Tb ( 1′ ), Gd ( 2′ ), and Eu ( 3′ )] have been prepared by reacting Ln III ions with tricarboxylate‐perchlorotriphenylmethyl/methane ligands that have a radical (PTMTC 3− ) or closed‐shell (αHPTMTC 3− ) character, respectively. X‐ray diffraction analyses reveal 3D architectures that combine helical 1D channels and a fairly rare (6,3) connectivity described with the (4 2 .8)⋅(4 4 .6 2 .8 5 .10 4 ) Schäfli symbol. Such 3D architectures make these polymers porous solids upon departure of the non‐coordinated guest‐solvent molecules as confirmed by the XRD structure of the guest‐free [Tb(PTMTC)(EtOH) 2 H 2 O] and [Tb(αHPTMTC)(EtOH) 2 H 2 O] materials. Accessible voids represent 40 % of the cell volume. Metal‐centered luminescence was observed in Tb III and Eu III coordination polymers 1′ and 3′ , although the Ln III ‐ion luminescence was quenched when radical ligands were involved. The magnetic properties of all these compounds were investigated, and the nature of the {Ln–radical} (in 1 and 2 ) and the {radical–radical} exchange interactions (in 3 ) were assessed by comparing the behaviors for the radical‐based coordination polymers 1 – 3 with those of the compounds with the diamagnetic ligand set. Whilst antiferromagnetic {radical–radical} interactions were found in 3 , ferromagnetic {Ln–radical} interactions propagated in the 3D architectures of 1 and 2 ." @default.
• W2017367304 created "2016-06-24" @default.
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• W2017367304 date "2011-12-08" @default.
• W2017367304 modified "2023-10-18" @default.
• W2017367304 title "Three-Dimensional Porous Metal-Radical Frameworks Based on Triphenylmethyl Radicals" @default.
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