Anion-directed supramolecular assembly of cobalt(II)-fluconazole coordination polymers

Structural diversity, fluorescent and magnetic properties

Lei Zhang, Wang Wei Chen, Yuan Yuan Ge, Yun Ling, Xin Ping Ouyang, Jing Li, Miao Du

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Six fluconazole-bridged cobalt(II) coordination polymers, namely [Co(HFlu)2(H2O)2](ClO4)2 (1), [Co(HFlu)2(H2O)(AcO)](AcO)·2C2H5OH (2), [Co(HFlu)2Cl2]·2C2H5OH (3), [Co3(Flu)2(acac)4]·C2H5OH (4), [Co(HFlu)2(malo)(H2O)]·3H2O (5), and [Co(HFlu)2(fum)(H2O)2]·H2O (6) (HFlu = 2-(2′,4′-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol, AcOH = acetate acid, Hacac = acetylacetonate, H2malo = malonate acid, H2fum = fumaric acid), have been synthesized and structurally characterized, and the thermal, fluorescent and magnetic properties investigated. The crystal structures display the one-dimensional cationic double-bridged chain consisting of 20-membered macrocycles to be parallel in 1 and perpendicular in 2. The structure of 3 consists of two-dimensional neutral rhombic grid in bc plane with (4,4) topology and alternative P/M helices intersecting at the Co sites along b direction. Complex 4 shows one-dimensional polymeric chain, in which binuclear Co2(Flu)2(acac)2 units act as bridging blocks to link Co(acac)2 nodes through triazolyl nitrogen atoms. The structure of 5 shows dimeric 20-membered macrometallacyclic motif. Complex 6 shows HFlu-bridged one-dimensional chain, which is stabilized by hydrogen-bonding interactions to produce alternative hydrophobic and hydrophilic architecture. Complexes 1-3 and 5-6 exhibit the similar electronic absorption and fluorescent spectra as those of HFlu, while complex 4 shows a fluorescent quenching phenomenon. Fluorescence titration of HFlu suggests that the fluorescent intensities at the maximal emission decrease upon the addition of Co(acac)2. The variable-temperature magnetic measurement of 4 reveals weak ferromagnetic interaction combined with the spin-orbit coupling effect in the 1-D Co(II) chain.

Original languageEnglish
Pages (from-to)866-876
Number of pages11
JournalInorganica Chimica Acta
Volume363
Issue number5
DOIs
Publication statusPublished - Mar 22 2010

Fingerprint

Fluconazole
Cobalt
coordination polymers
Anions
Magnetic properties
Polymers
Negative ions
cobalt
assembly
magnetic properties
anions
acids
Acids
Magnetic variables measurement
Titration
Temperature measurement
electronic spectra
titration
helices
nitrogen atoms

Keywords

  • Coordination polymer
  • Crystal structure
  • Fluconazole
  • Fluorescent
  • Magnetic property

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry
  • Materials Chemistry

Cite this

Anion-directed supramolecular assembly of cobalt(II)-fluconazole coordination polymers : Structural diversity, fluorescent and magnetic properties. / Zhang, Lei; Chen, Wang Wei; Ge, Yuan Yuan; Ling, Yun; Ouyang, Xin Ping; Li, Jing; Du, Miao.

In: Inorganica Chimica Acta, Vol. 363, No. 5, 22.03.2010, p. 866-876.

Research output: Contribution to journalArticle

Zhang, Lei ; Chen, Wang Wei ; Ge, Yuan Yuan ; Ling, Yun ; Ouyang, Xin Ping ; Li, Jing ; Du, Miao. / Anion-directed supramolecular assembly of cobalt(II)-fluconazole coordination polymers : Structural diversity, fluorescent and magnetic properties. In: Inorganica Chimica Acta. 2010 ; Vol. 363, No. 5. pp. 866-876.
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abstract = "Six fluconazole-bridged cobalt(II) coordination polymers, namely [Co(HFlu)2(H2O)2](ClO4)2 (1), [Co(HFlu)2(H2O)(AcO)](AcO)·2C2H5OH (2), [Co(HFlu)2Cl2]·2C2H5OH (3), [Co3(Flu)2(acac)4]·C2H5OH (4), [Co(HFlu)2(malo)(H2O)]·3H2O (5), and [Co(HFlu)2(fum)(H2O)2]·H2O (6) (HFlu = 2-(2′,4′-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol, AcOH = acetate acid, Hacac = acetylacetonate, H2malo = malonate acid, H2fum = fumaric acid), have been synthesized and structurally characterized, and the thermal, fluorescent and magnetic properties investigated. The crystal structures display the one-dimensional cationic double-bridged chain consisting of 20-membered macrocycles to be parallel in 1 and perpendicular in 2. The structure of 3 consists of two-dimensional neutral rhombic grid in bc plane with (4,4) topology and alternative P/M helices intersecting at the Co sites along b direction. Complex 4 shows one-dimensional polymeric chain, in which binuclear Co2(Flu)2(acac)2 units act as bridging blocks to link Co(acac)2 nodes through triazolyl nitrogen atoms. The structure of 5 shows dimeric 20-membered macrometallacyclic motif. Complex 6 shows HFlu-bridged one-dimensional chain, which is stabilized by hydrogen-bonding interactions to produce alternative hydrophobic and hydrophilic architecture. Complexes 1-3 and 5-6 exhibit the similar electronic absorption and fluorescent spectra as those of HFlu, while complex 4 shows a fluorescent quenching phenomenon. Fluorescence titration of HFlu suggests that the fluorescent intensities at the maximal emission decrease upon the addition of Co(acac)2. The variable-temperature magnetic measurement of 4 reveals weak ferromagnetic interaction combined with the spin-orbit coupling effect in the 1-D Co(II) chain.",
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AU - Ouyang, Xin Ping

AU - Li, Jing

AU - Du, Miao

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N2 - Six fluconazole-bridged cobalt(II) coordination polymers, namely [Co(HFlu)2(H2O)2](ClO4)2 (1), [Co(HFlu)2(H2O)(AcO)](AcO)·2C2H5OH (2), [Co(HFlu)2Cl2]·2C2H5OH (3), [Co3(Flu)2(acac)4]·C2H5OH (4), [Co(HFlu)2(malo)(H2O)]·3H2O (5), and [Co(HFlu)2(fum)(H2O)2]·H2O (6) (HFlu = 2-(2′,4′-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol, AcOH = acetate acid, Hacac = acetylacetonate, H2malo = malonate acid, H2fum = fumaric acid), have been synthesized and structurally characterized, and the thermal, fluorescent and magnetic properties investigated. The crystal structures display the one-dimensional cationic double-bridged chain consisting of 20-membered macrocycles to be parallel in 1 and perpendicular in 2. The structure of 3 consists of two-dimensional neutral rhombic grid in bc plane with (4,4) topology and alternative P/M helices intersecting at the Co sites along b direction. Complex 4 shows one-dimensional polymeric chain, in which binuclear Co2(Flu)2(acac)2 units act as bridging blocks to link Co(acac)2 nodes through triazolyl nitrogen atoms. The structure of 5 shows dimeric 20-membered macrometallacyclic motif. Complex 6 shows HFlu-bridged one-dimensional chain, which is stabilized by hydrogen-bonding interactions to produce alternative hydrophobic and hydrophilic architecture. Complexes 1-3 and 5-6 exhibit the similar electronic absorption and fluorescent spectra as those of HFlu, while complex 4 shows a fluorescent quenching phenomenon. Fluorescence titration of HFlu suggests that the fluorescent intensities at the maximal emission decrease upon the addition of Co(acac)2. The variable-temperature magnetic measurement of 4 reveals weak ferromagnetic interaction combined with the spin-orbit coupling effect in the 1-D Co(II) chain.

AB - Six fluconazole-bridged cobalt(II) coordination polymers, namely [Co(HFlu)2(H2O)2](ClO4)2 (1), [Co(HFlu)2(H2O)(AcO)](AcO)·2C2H5OH (2), [Co(HFlu)2Cl2]·2C2H5OH (3), [Co3(Flu)2(acac)4]·C2H5OH (4), [Co(HFlu)2(malo)(H2O)]·3H2O (5), and [Co(HFlu)2(fum)(H2O)2]·H2O (6) (HFlu = 2-(2′,4′-difluorophenyl)-1,3-bis(1,2,4-triazol-1-yl)-propan-2-ol, AcOH = acetate acid, Hacac = acetylacetonate, H2malo = malonate acid, H2fum = fumaric acid), have been synthesized and structurally characterized, and the thermal, fluorescent and magnetic properties investigated. The crystal structures display the one-dimensional cationic double-bridged chain consisting of 20-membered macrocycles to be parallel in 1 and perpendicular in 2. The structure of 3 consists of two-dimensional neutral rhombic grid in bc plane with (4,4) topology and alternative P/M helices intersecting at the Co sites along b direction. Complex 4 shows one-dimensional polymeric chain, in which binuclear Co2(Flu)2(acac)2 units act as bridging blocks to link Co(acac)2 nodes through triazolyl nitrogen atoms. The structure of 5 shows dimeric 20-membered macrometallacyclic motif. Complex 6 shows HFlu-bridged one-dimensional chain, which is stabilized by hydrogen-bonding interactions to produce alternative hydrophobic and hydrophilic architecture. Complexes 1-3 and 5-6 exhibit the similar electronic absorption and fluorescent spectra as those of HFlu, while complex 4 shows a fluorescent quenching phenomenon. Fluorescence titration of HFlu suggests that the fluorescent intensities at the maximal emission decrease upon the addition of Co(acac)2. The variable-temperature magnetic measurement of 4 reveals weak ferromagnetic interaction combined with the spin-orbit coupling effect in the 1-D Co(II) chain.

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