A family of lanthanide metal–organic frameworks based on a redox-active tetrathiafulvalene-dicarboxylate ligand showing slow relaxation of magnetisation and electronic conductivity. Issue 41 (29th September 2021)

• Record Type: Journal Article
• Authors: Hu, Jun-Jie; Li, Yu-Guang; Wen, He-Rui; Liu, Sui-Jun; Peng, Yan; Liu, Cai-Ming
• Is Part Of: Dalton transactions. Volume 50:Issue 41(2021)
• Page Start: 14714
• Page End: 14723
• Publication Date: 2021-09-29
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt01851e
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Family of isomorphic Ln-MOFs based on redox-active tetrathiafulvalene ligand were synthesized. And their electronic conductivity and slow magnetic relaxation behavior are significantly changed after oxidation. Abstract : The reaction of the redox-active tetrathiafulvalene ligand and lanthanide ions is an important approach to prepare photo-electro-magnetic multifunctional metal–organic framework materials. A series of isostructural lanthanide metal–organic frameworks (Ln-MOFs) based on the in situ generated tetrathiafulvalene dicarboxylate (TTF-DC) ligand, {[Ln4 (TTF-DC)6 (DMF)4 (H2 O)2 ]·4DMF} n (Ln = Gd (1-Gd ), Tb (1-Tb ), Dy (1-Dy ) and Er (1-Er )), was synthesized and characterized. These Ln-MOFs display tunable redox-active properties and semiconductor performance, and their electronic conductivities have been significantly improved after oxidation. All MOFs except 2-Tb exhibit slow magnetic relaxation under an applied dc field. 1-Dy and 2-Dy show field-induced single-molecule magnet (SMM) behaviour with energy barriers ( U eff ) of 30.77 K ( τ 0 = 5.23 × 10 −8 ) and 26.41 K (1.04 × 10 −8 s), respectively.