Ionic strength effect on regulating the synthetic assembly of polyoxometalate clusters with slow magnetic relaxation behavior. Issue 46 (14th November 2020)

• Record Type: Journal Article
• Authors: Cai, Jing; Ye, Run; Liu, Xinhao; Guo, Leilei; Qiao, Xinrong
• Is Part Of: Dalton transactions. Volume 49:Issue 46(2020)
• Page Start: 16954
• Page End: 16961
• Publication Date: 2020-11-14
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0dt02409k
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Three new types of polyoxometalate clusters displaying different structural features were obtained using the ionic strength regulated strategy. Abstract : Three novel polyoxometalate (POM) clusters of K10 Na10 [Dy3 (H2 O)6 Ni(H2 O)(W3 O11 )(B-α-SbW9 O33 )3 ]·(H2 O)45 (1 ), (NH4 )5 K4 Na8 [Dy3 (H2 O)6 Sb V (H2 O)(W3 O11 )(B-α-SbW9 O33 )3 ]·(H2 O)50 (2 ), and (NH4 )9 Na[Ni2 (H2 O)6 (WO2 )2 (B-β-SbW9 O33 )2 ]·(H2 O)24 (3 ) were successfully obtained using the same precursor under different ionic strength conditions. Structural analysis showed that compounds 1–3 possess discrepant structural characteristics in 1 M KCl, 1 M NH4 Cl, and saturated NH4 Cl, respectively. Among them, 2 is the first reported lanthanide cluster including both Sb 3+ and Sb 5+ in POM derivatives. Furthermore, the analysis of ac magnetic data proved that 1 and 2 embodied dramatic field-induced slow magnetic relaxation, and the effective barrier of 2 was estimated as U eff / K B = 21.10 K based on the Orbach process. It was found that the structure and magnetic properties of POM materials can be regulated using an effective and satisfactory ionic strength-controlled strategy.