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Issue 24, 2012
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[NH2(C2H4)2O]MX5: a new family of morpholinium nonlinear optical materials among halogenoantimonate(III) and halogenobismuthate(III) compounds. Structural characterization, dielectric and piezoelectric properties

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Abstract

This paper presents the structural features of ionic complexes formed by morpholine and metal ions which belong to group VA, namely Sb(III) and Bi(III). A series of target inorganic–organic hybrid compounds of the general formula [NH2(C2H4)2O]2MX5 (where M = Sb, Bi; X = Cl, Br) has been synthesized by incorporating the organic component (morpholine) into the highly polarizable one-dimensional halogenoantimonate(III)/halogenobismuthate(III) chain network. Among the studied compounds, four were found to crystallize in the room temperature phase in the piezoelectric, orthorhombic space group P212121, Z = 4, the feature being confirmed by the powder second harmonic generation of light and piezoelectric measurements. Dielectric dispersion studies between 200 Hz and 2 MHz disclosed a relaxation process below room temperature well described by the Cole–Cole equation. Based on crystal structures available in Cambridge Structural Database (version 5.32, November 2010) we attempt to show a relationship between the acentric symmetry of compounds and the type of anionic network within the R2MX5-subgroup (where R denotes organic cation) of halogenoantimonates(III) and halogenobismuthates(III).

Graphical abstract: [NH2(C2H4)2O]MX5: a new family of morpholinium nonlinear optical materials among halogenoantimonate(iii) and halogenobismuthate(iii) compounds. Structural characterization, dielectric and piezoelectric properties

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Publication details

The article was received on 09 Feb 2012, accepted on 06 Apr 2012 and first published on 11 Apr 2012


Article type: Paper
DOI: 10.1039/C2DT30291H
Citation: Dalton Trans., 2012,41, 7285-7294
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    [NH2(C2H4)2O]MX5: a new family of morpholinium nonlinear optical materials among halogenoantimonate(III) and halogenobismuthate(III) compounds. Structural characterization, dielectric and piezoelectric properties

    M. Owczarek, P. Szklarz, R. Jakubas and A. Miniewicz, Dalton Trans., 2012, 41, 7285
    DOI: 10.1039/C2DT30291H

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