Synthesis and liquid crystal properties of copper(II) and palladium(II) chelates with new ferrocene-containing enaminoketones

Oleg N. Kadkin; Eun Ho Kim; So Yeon Kim; Moon Gun Choi

doi:10.1016/j.poly.2009.01.045

Synthesis and liquid crystal properties of copper(II) and palladium(II) chelates with new ferrocene-containing enaminoketones

Oleg N. Kadkin, Eun Ho Kim, So Yeon Kim, Moon Gun Choi

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Heterometallic liquid crystals are of special interest because of the possibility to combine optical, magnetic and electric properties of different metal ions in one mesogenic molecule. In order to investigate new heteropolynuclear mesogenic systems, a series of β-aminovinylketone ligands derived from acetyl ferrocene have been synthesized. Subsequently Cu(II) and Pd(II) ions were incorporated into the enaminoketone chelate core. The obtained ligands and complexes were characterized by element analysis, ¹H NMR, IR and UV-Vis spectroscopies. According to thermal polarizing microscopy and DSC studies, the ligands and Cu(II) complexes exhibit disordered soft crystal phases upon cooling from the isotropic liquid state. The Pd(II) complexes showed monotropic smectic C mesomorphism. The metal centres in the synthesized heteropolynuclear mesogens are in close vicinity to each other, which is of considerable interest from the viewpoint of the potential electron-transfer interactions between a ferrocene core and the central ions.

Original language	English
Pages (from-to)	1301-1307
Number of pages	7
Journal	Polyhedron
Volume	28
Issue number	7
DOIs	https://doi.org/10.1016/j.poly.2009.01.045
Publication status	Published - 2009 May 12

Bibliographical note

Funding Information:
This work has been supported by a grant from the Korea Science and Engineering Foundation (KOSEF) through the Center for Bioactive Molecular Hybrids (CBMH), and the program Brain Korea 21 (BK-21).

All Science Journal Classification (ASJC) codes

Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.poly.2009.01.045

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title = "Synthesis and liquid crystal properties of copper(II) and palladium(II) chelates with new ferrocene-containing enaminoketones",

abstract = "Heterometallic liquid crystals are of special interest because of the possibility to combine optical, magnetic and electric properties of different metal ions in one mesogenic molecule. In order to investigate new heteropolynuclear mesogenic systems, a series of β-aminovinylketone ligands derived from acetyl ferrocene have been synthesized. Subsequently Cu(II) and Pd(II) ions were incorporated into the enaminoketone chelate core. The obtained ligands and complexes were characterized by element analysis, 1H NMR, IR and UV-Vis spectroscopies. According to thermal polarizing microscopy and DSC studies, the ligands and Cu(II) complexes exhibit disordered soft crystal phases upon cooling from the isotropic liquid state. The Pd(II) complexes showed monotropic smectic C mesomorphism. The metal centres in the synthesized heteropolynuclear mesogens are in close vicinity to each other, which is of considerable interest from the viewpoint of the potential electron-transfer interactions between a ferrocene core and the central ions.",

author = "Kadkin, {Oleg N.} and Kim, {Eun Ho} and Kim, {So Yeon} and Choi, {Moon Gun}",

note = "Funding Information: This work has been supported by a grant from the Korea Science and Engineering Foundation (KOSEF) through the Center for Bioactive Molecular Hybrids (CBMH), and the program Brain Korea 21 (BK-21).",

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AU - Kadkin, Oleg N.

AU - Kim, Eun Ho

AU - Kim, So Yeon

AU - Choi, Moon Gun

N1 - Funding Information: This work has been supported by a grant from the Korea Science and Engineering Foundation (KOSEF) through the Center for Bioactive Molecular Hybrids (CBMH), and the program Brain Korea 21 (BK-21).

PY - 2009/5/12

Y1 - 2009/5/12

N2 - Heterometallic liquid crystals are of special interest because of the possibility to combine optical, magnetic and electric properties of different metal ions in one mesogenic molecule. In order to investigate new heteropolynuclear mesogenic systems, a series of β-aminovinylketone ligands derived from acetyl ferrocene have been synthesized. Subsequently Cu(II) and Pd(II) ions were incorporated into the enaminoketone chelate core. The obtained ligands and complexes were characterized by element analysis, 1H NMR, IR and UV-Vis spectroscopies. According to thermal polarizing microscopy and DSC studies, the ligands and Cu(II) complexes exhibit disordered soft crystal phases upon cooling from the isotropic liquid state. The Pd(II) complexes showed monotropic smectic C mesomorphism. The metal centres in the synthesized heteropolynuclear mesogens are in close vicinity to each other, which is of considerable interest from the viewpoint of the potential electron-transfer interactions between a ferrocene core and the central ions.

AB - Heterometallic liquid crystals are of special interest because of the possibility to combine optical, magnetic and electric properties of different metal ions in one mesogenic molecule. In order to investigate new heteropolynuclear mesogenic systems, a series of β-aminovinylketone ligands derived from acetyl ferrocene have been synthesized. Subsequently Cu(II) and Pd(II) ions were incorporated into the enaminoketone chelate core. The obtained ligands and complexes were characterized by element analysis, 1H NMR, IR and UV-Vis spectroscopies. According to thermal polarizing microscopy and DSC studies, the ligands and Cu(II) complexes exhibit disordered soft crystal phases upon cooling from the isotropic liquid state. The Pd(II) complexes showed monotropic smectic C mesomorphism. The metal centres in the synthesized heteropolynuclear mesogens are in close vicinity to each other, which is of considerable interest from the viewpoint of the potential electron-transfer interactions between a ferrocene core and the central ions.

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Synthesis and liquid crystal properties of copper(II) and palladium(II) chelates with new ferrocene-containing enaminoketones

Abstract

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