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Issue 43, 2013
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A phosphorus-based compartmental ligand, (S)P[N(Me)N[double bond, length as m-dash]CH–C6H3-2-O-3-OMe]3 (LH3), enables the assembly of luminescent heterobimetallic linear {L2Zn2Ln}+ [Ln = Gd, Tb, Nd and Eu] complexes

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Abstract

The sequential reaction of a phosphorus-based trishydrazone ligand, LH3 with anhydrous ZnCl2 and LnCl3·6H2O in a 2 : 2 : 1 stoichiometric ratio in the presence of triethylamine as the base leads to the formation of monocationic trinuclear complexes [L2Zn2Ln]Cl {Ln = Gd (1), Tb (2), Nd (3), Eu (4) and L = [(S)P[N(Me)N[double bond, length as m-dash]CH–C6H3-2-O-3-OMe]3}. All the three metal ions, in each of these compounds, are arranged in a linear fashion. The two terminal Zn(II) ions are encapsulated by three imino and three phenolate oxygen atoms while the lanthanide ion remains in the centre with an all-oxygen coordination environment. Detailed photophysical measurements reveal the complete absence of antenna sensitization in all the four complexes. However, a strong emission was found for 2 and 4 when excited directly at their f–f levels.

Graphical abstract: A phosphorus-based compartmental ligand, (S)P[N(Me)N [[double bond, length as m-dash]] CH–C6H3-2-O-3-OMe]3 (LH3), enables the assembly of luminescent heterobimetallic linear {L2Zn2Ln}+ [Ln = Gd, Tb, Nd and Eu] complexes

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Publication details

The article was received on 01 Jun 2013, accepted on 12 Aug 2013 and first published on 12 Aug 2013


Article type: Paper
DOI: 10.1039/C3DT51431E
Dalton Trans., 2013,42, 15447-15456

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    A phosphorus-based compartmental ligand, (S)P[N(Me)N[double bond, length as m-dash]CH–C6H3-2-O-3-OMe]3 (LH3), enables the assembly of luminescent heterobimetallic linear {L2Zn2Ln}+ [Ln = Gd, Tb, Nd and Eu] complexes

    V. Chandrasekhar, P. Bag, B. Murugesapandian and M. D. Pandey, Dalton Trans., 2013, 42, 15447
    DOI: 10.1039/C3DT51431E

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