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Alkali metal ion mediated self-assembly of vanadium(V) ions and pyrazole based polydentate ligands leading to the formation of helix, double helix and supramolecular cage-like structures

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Title: Alkali metal ion mediated self-assembly of vanadium(V) ions and pyrazole based polydentate ligands leading to the formation of helix, double helix and supramolecular cage-like structures
Authors: Hazra, Arijit1, Gupta, Samik1, Roy, Somnath1, Mandal, Tarak Nath1, Das, Kinsuk2, Konar, Saugata1, Jana, Atanu1, Ray, Sangita1, Butcher, Ray J.3, Kar, Susanta Kumar1 skkar_cu@yahoo.co.in
Source: Polyhedron. Jan2011, Vol. 30 Issue 1, p187-194. 8p.
Subjects: Alkali metals, Metal ions, Molecular self-assembly, Pyrazoles, Ligands (Chemistry), Supramolecular chemistry, Molecular structure, Vanadates, Schiff bases
Abstract: Abstract: The anionic cis-dioxovanadium(V) complex species LVO2 − and L1VO2 − of two tridentate ONO ligands (H2L and H2L1) can bind alkali metal ions in a bis-monodentate fashion like a bridging carboxylate group. Here H2L (N′-[(E)-(2-hydroxyphenyl)methylidene]-3-methyl-1H-pyrazole-5-carbohydrazide) and H2L1 (N′-[(1E)-1-(2-hydroxyphenyl) ethylidene]-3-methyl-1H-pyrazole-5-carbohydrazide) are Schiff base ligands generated by the condensation of 5-methyl 3-pyrazole carbohydrazide with salicylaldehyde and o-hydroxy acetophenone. The six products thus obtained are water soluble polymeric compounds in which the complementary units are held together by the simultaneous use of hydrogen bonding and coulombic interactions. [L1VO2Li(H2O)2]∞ (2), [LVO2Na(H2O)2]∞ (3) and [LVO2K(H2O)2]∞ (5) have been crystallographically characterized. Crystallographic characterization reveals that 2 and 3 are polymeric helicates and 5 is a polymeric cluster with L1VO2 − or LVO2 − units bridging the labile alkali metal ions which occupy positions on the axis of the polymeric chain. [ABSTRACT FROM AUTHOR]
Copyright of Polyhedron is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Alkali metal ion mediated self-assembly of vanadium(V) ions and pyrazole based polydentate ligands leading to the formation of helix, double helix and supramolecular cage-like structures
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  Data: <searchLink fieldCode="AR" term="%22Hazra%2C+Arijit%22">Hazra, Arijit</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Gupta%2C+Samik%22">Gupta, Samik</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Roy%2C+Somnath%22">Roy, Somnath</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Mandal%2C+Tarak+Nath%22">Mandal, Tarak Nath</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Das%2C+Kinsuk%22">Das, Kinsuk</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Konar%2C+Saugata%22">Konar, Saugata</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Jana%2C+Atanu%22">Jana, Atanu</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Ray%2C+Sangita%22">Ray, Sangita</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Butcher%2C+Ray+J%2E%22">Butcher, Ray J.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Kar%2C+Susanta+Kumar%22">Kar, Susanta Kumar</searchLink><relatesTo>1</relatesTo><i> skkar_cu@yahoo.co.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Polyhedron%22">Polyhedron</searchLink>. Jan2011, Vol. 30 Issue 1, p187-194. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Alkali+metals%22">Alkali metals</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+ions%22">Metal ions</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+self-assembly%22">Molecular self-assembly</searchLink><br /><searchLink fieldCode="DE" term="%22Pyrazoles%22">Pyrazoles</searchLink><br /><searchLink fieldCode="DE" term="%22Ligands+%28Chemistry%29%22">Ligands (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Supramolecular+chemistry%22">Supramolecular chemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Molecular+structure%22">Molecular structure</searchLink><br /><searchLink fieldCode="DE" term="%22Vanadates%22">Vanadates</searchLink><br /><searchLink fieldCode="DE" term="%22Schiff+bases%22">Schiff bases</searchLink>
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  Data: Abstract: The anionic cis-dioxovanadium(V) complex species LVO2 − and L1VO2 − of two tridentate ONO ligands (H2L and H2L1) can bind alkali metal ions in a bis-monodentate fashion like a bridging carboxylate group. Here H2L (N′-[(E)-(2-hydroxyphenyl)methylidene]-3-methyl-1H-pyrazole-5-carbohydrazide) and H2L1 (N′-[(1E)-1-(2-hydroxyphenyl) ethylidene]-3-methyl-1H-pyrazole-5-carbohydrazide) are Schiff base ligands generated by the condensation of 5-methyl 3-pyrazole carbohydrazide with salicylaldehyde and o-hydroxy acetophenone. The six products thus obtained are water soluble polymeric compounds in which the complementary units are held together by the simultaneous use of hydrogen bonding and coulombic interactions. [L1VO2Li(H2O)2]∞ (2), [LVO2Na(H2O)2]∞ (3) and [LVO2K(H2O)2]∞ (5) have been crystallographically characterized. Crystallographic characterization reveals that 2 and 3 are polymeric helicates and 5 is a polymeric cluster with L1VO2 − or LVO2 − units bridging the labile alkali metal ions which occupy positions on the axis of the polymeric chain. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Polyhedron is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.poly.2010.10.017
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 187
    Subjects:
      – SubjectFull: Alkali metals
        Type: general
      – SubjectFull: Metal ions
        Type: general
      – SubjectFull: Molecular self-assembly
        Type: general
      – SubjectFull: Pyrazoles
        Type: general
      – SubjectFull: Ligands (Chemistry)
        Type: general
      – SubjectFull: Supramolecular chemistry
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      – SubjectFull: Molecular structure
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      – SubjectFull: Vanadates
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      – SubjectFull: Schiff bases
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      – TitleFull: Alkali metal ion mediated self-assembly of vanadium(V) ions and pyrazole based polydentate ligands leading to the formation of helix, double helix and supramolecular cage-like structures
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              Text: Jan2011
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