Tracking the Formation of a Series of Con (n=2, 6, 8) Clusters from Linear Co3 Precursor Clusters by Optimizing the Reaction Conditions. Issue 27 (18th July 2018)

• Record Type: Journal Article
• Authors: Pang, Xuhong; Liu, Jianfang; Wei, Gui; Shi, Dongwei; Bian, Hedong; Liu, Hanfu; Yao, Di; Li, Haiye; Huang, Fuping
• Is Part Of: ChemistrySelect. Volume 3:Issue 27(2018)
• Page Start: 7830
• Page End: 7835
• Publication Date: 2018-07-18
• Subjects: Co(II) Cluster compounds -- Mass spectrometry -- Structural transformations -- The formation process; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.201800898
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Starting from two low‐nuclearity linear synthesised Co3 precursors {[Co3 L'2 (H2 O)6 ]⋅2NO3 ⋅4H2 O} (1 ) and {[Co3 L'2 (H2 O)6 ]⋅2NO3 } (2 ) (here, H2 L=bis((pyridine‐2‐yl)‐1, 2, 4‐triazol‐5‐yl)methane, H2 L'=bis((pyridine‐2‐yl)‐1, 2, 4‐triazol −5‐yl)ketone), a series of Co3‐substituted complexes and two higher‐nuclearity Co(II) clusters {[Co8 L6 ( μ 3 ‐O)2 ]⋅5H2 O} (3 ) and [Co6 L4 (MeOH)6 (OAc)4 ] (4 ) have been synthesized and characterized through regulating solvent, anion, and pH conditions. For tracking the formation of higher‐nuclearity clusters, the single‐crystal X‐ray diffraction (SXRD), powder X‐ray diffraction (PXRD) and electrospray ionization mass spectrometry (ESI‐MS) analyses for the solid‐liquid phase at different times, revealed that [Co2 L2 ] and [Co2 L] species can combine together to form [Co4 L3 ] species, which bridged each other through two [ μ 3 ‐O] 2− ions in strong alkaline conditions, to get [Co8 ( μ 3 ‐O)2 L6 ] units in 3 ; which or combined [Co2 L] species in weak alkaline conditions, to get [Co6 L4 ] species in 4 . And the antiferromagnetic coupling in 1–4 has been briefly investigated. Abstract : Starting from two low‐nuclearity linear synthesised Co3 precursors {[Co3 L'2 (H2 O)6 ]⋅2NO3 ⋅4H2 O} (1 ) and {[Co3 L'2 (H2 O)6 ]⋅2NO3 } (2 ), a series of Co3‐substituted complexes and two higher‐nuclearity Co(II) clusters {[Co8 L6 ( μ 3 ‐O)2 ]⋅5H2 O} (3 ) and [Co6 L4 (MeOH)6 (OAc)4 ] (4 ) have been synthesized and characterized through regulating solvent, anion, and pH conditions. For speculating the assembly mechanism of higher‐nuclearity clusters, the SXRD, PXRD and ESI‐MS analyses for the solid‐liquid phase at different times, and proposed the possible conversion process.