Jump to main content
Jump to site search

Issue 9, 2011
Previous Article Next Article

Synthesis and self-assembly of spin-labile and redox-active manganese(III) complexes

Author affiliations

Abstract

New amphiphilic and spin-labile MnIII complexes based on dianionic N4O2-hexadentate sal2trien or sal2bapen ligands, which contain OC6H13, OC12H25, or OC18H37 alkoxy substituents at different positions of the salicylidene unit were prepared (H2sal2trien = N,N′′′-bis(salicylidene)-1,4,7,10-tetraazadecane, H2sal2bapen = N,N′′′-bis(salicylidene)-1,5,8,12-tetraazadodecane). According to electrochemical measurements, these complexes undergo two (quasi)reversible redox processes. Temperature-dependent magnetic measurements revealed a high-spin configuration for all sal2trien complexes (S = 2) and gradual spin crossover for sal2bapen complexes from high to low spin (S = 1). The chain length strongly influences the spin crossover, as C18-functionalization stabilizes the low spin state at much higher temperatures than shorter alkyl chains. Moreover, long alkyl chains allow for spontaneous self-assembly of the molecules, which was investigated in single crystals and in Langmuir-films at the air–water interface. Long alkyl chains (C12 or C18) as well as a mutual syn-orientation of these molecular recognition sites were required for the Langmuir monolayers to be stable.

Graphical abstract: Synthesis and self-assembly of spin-labile and redox-active manganese(iii) complexes

Back to tab navigation

Supplementary files

Publication details

The article was received on 13 Sep 2010, accepted on 08 Dec 2010 and first published on 01 Feb 2011


Article type: Paper
DOI: 10.1039/C0DT01222J
Citation: Dalton Trans., 2011,40, 1855-1865
  •   Request permissions

    Synthesis and self-assembly of spin-labile and redox-active manganese(III) complexes

    C. Gandolfi, T. Cotting, P. N. Martinho, O. Sereda, A. Neels, G. G. Morgan and M. Albrecht, Dalton Trans., 2011, 40, 1855
    DOI: 10.1039/C0DT01222J

Search articles by author

Spotlight

Advertisements