Limits...
Vapochromic behaviour of M[Au(CN)2]2-based coordination polymers (M = Co, Ni).

Lefebvre J, Korčok JL, Katz MJ, Leznoff DB - Sensors (Basel) (2012)

Bottom Line: Co[Au(CN)(2)](2)(DMSO)(2) and M[Au(CN)(2)](2)(DMF)(2) (M = Co, Ni) complexes have flat 2-D square-grid layer structures with trans-bound DMSO or DMF units; they are formed via vapour absorption by solid M(μ-OH(2))[Au(CN)(2)](2) and from DMSO or DMF solution synthesis.Absorption of pyridine vapour by solid Ni(μ-OH(2))[Au(CN)(2)](2) was incomplete, generating a mixture of pyridine-bound complexes.Analyte-free Co[Au(CN)(2)](2) was prepared by dehydration of Co(μ-OH(2))[Au(CN)(2)](2) at 145 °C; it has a 3-D diamondoid-type structure and absorbs DMSO, DMF and pyridine to give the same materials as by vapour absorption from the hydrate.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada. jlefebvr@ucalgary.ca

ABSTRACT
A series of M[Au(CN)(2)](2)(analyte)(x) coordination polymers (M = Co, Ni; analyte = dimethylsulfoxide (DMSO), N,N-dimethylformamide (DMF), pyridine; x = 2 or 4) was prepared and characterized. Addition of analyte vapours to solid M(μ-OH(2))[Au(CN)(2)](2) yielded visible vapochromic responses for M = Co but not M = Ni; the IR ν(CN) spectral region changed in every case. A single crystal structure of Zn[Au(CN)(2)](2)(DMSO)(2) revealed a corrugated 2-D layer structure with cis-DMSO units. Reacting a Ni(II) salt and K[Au(CN)(2)] in DMSO yielded the isostructural Ni[Au(CN)(2)](2)(DMSO)(2) product. Co[Au(CN)(2)](2)(DMSO)(2) and M[Au(CN)(2)](2)(DMF)(2) (M = Co, Ni) complexes have flat 2-D square-grid layer structures with trans-bound DMSO or DMF units; they are formed via vapour absorption by solid M(μ-OH(2))[Au(CN)(2)](2) and from DMSO or DMF solution synthesis. Co[Au(CN)(2)](2)(pyridine)(4) is generated via vapour absorption by Co(μ-OH(2))[Au(CN)(2)](2); the analogous Ni complex is synthesized by immersion of Ni(μ-OH(2))[Au(CN)(2)](2) in 4% aqueous pyridine. Similar immersion of Co(μ-OH(2))[Au(CN)(2)](2) yielded Co[Au(CN)(2)](2)(pyridine)(2), which has a flat 2-D square-grid structure with trans-pyridine units. Absorption of pyridine vapour by solid Ni(μ-OH(2))[Au(CN)(2)](2) was incomplete, generating a mixture of pyridine-bound complexes. Analyte-free Co[Au(CN)(2)](2) was prepared by dehydration of Co(μ-OH(2))[Au(CN)(2)](2) at 145 °C; it has a 3-D diamondoid-type structure and absorbs DMSO, DMF and pyridine to give the same materials as by vapour absorption from the hydrate.

No MeSH data available.


Related in: MedlinePlus

Comparison between the powder X-ray diffractogram determined experimentally for the Co[Au(CN)2]2(DMSO)2 (Co, purple) and the diffractogram predicted for Mn[Au(CN)2]2(H2O)2 from the single crystal structure (Mn, blue) [54].
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3376558&req=5

f4-sensors-12-03669: Comparison between the powder X-ray diffractogram determined experimentally for the Co[Au(CN)2]2(DMSO)2 (Co, purple) and the diffractogram predicted for Mn[Au(CN)2]2(H2O)2 from the single crystal structure (Mn, blue) [54].

Mentions: This reaction did not yield single crystals suitable for X-ray analysis, only microcrystalline powder. The powder diffractogram (Figure 4) was indexed and the unit cell parameters obtained are reported in Table 4. The diffractogram and the unit cell parameters do not match that of the Zn, Cu or Ni-containing M[Au(CN)2]2(DMSO)2 polymers (Figure 3 and Table 4), which suggests that a different structural arrangement is adopted. Due to the poor quality of the diffractogram, no structure refinement could be performed, but a structural model is proposed based on comparisons with other known complexes.


Vapochromic behaviour of M[Au(CN)2]2-based coordination polymers (M = Co, Ni).

Lefebvre J, Korčok JL, Katz MJ, Leznoff DB - Sensors (Basel) (2012)

Comparison between the powder X-ray diffractogram determined experimentally for the Co[Au(CN)2]2(DMSO)2 (Co, purple) and the diffractogram predicted for Mn[Au(CN)2]2(H2O)2 from the single crystal structure (Mn, blue) [54].
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376558&req=5

f4-sensors-12-03669: Comparison between the powder X-ray diffractogram determined experimentally for the Co[Au(CN)2]2(DMSO)2 (Co, purple) and the diffractogram predicted for Mn[Au(CN)2]2(H2O)2 from the single crystal structure (Mn, blue) [54].
Mentions: This reaction did not yield single crystals suitable for X-ray analysis, only microcrystalline powder. The powder diffractogram (Figure 4) was indexed and the unit cell parameters obtained are reported in Table 4. The diffractogram and the unit cell parameters do not match that of the Zn, Cu or Ni-containing M[Au(CN)2]2(DMSO)2 polymers (Figure 3 and Table 4), which suggests that a different structural arrangement is adopted. Due to the poor quality of the diffractogram, no structure refinement could be performed, but a structural model is proposed based on comparisons with other known complexes.

Bottom Line: Co[Au(CN)(2)](2)(DMSO)(2) and M[Au(CN)(2)](2)(DMF)(2) (M = Co, Ni) complexes have flat 2-D square-grid layer structures with trans-bound DMSO or DMF units; they are formed via vapour absorption by solid M(μ-OH(2))[Au(CN)(2)](2) and from DMSO or DMF solution synthesis.Absorption of pyridine vapour by solid Ni(μ-OH(2))[Au(CN)(2)](2) was incomplete, generating a mixture of pyridine-bound complexes.Analyte-free Co[Au(CN)(2)](2) was prepared by dehydration of Co(μ-OH(2))[Au(CN)(2)](2) at 145 °C; it has a 3-D diamondoid-type structure and absorbs DMSO, DMF and pyridine to give the same materials as by vapour absorption from the hydrate.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry, Simon Fraser University, Burnaby, BC, Canada. jlefebvr@ucalgary.ca

ABSTRACT
A series of M[Au(CN)(2)](2)(analyte)(x) coordination polymers (M = Co, Ni; analyte = dimethylsulfoxide (DMSO), N,N-dimethylformamide (DMF), pyridine; x = 2 or 4) was prepared and characterized. Addition of analyte vapours to solid M(μ-OH(2))[Au(CN)(2)](2) yielded visible vapochromic responses for M = Co but not M = Ni; the IR ν(CN) spectral region changed in every case. A single crystal structure of Zn[Au(CN)(2)](2)(DMSO)(2) revealed a corrugated 2-D layer structure with cis-DMSO units. Reacting a Ni(II) salt and K[Au(CN)(2)] in DMSO yielded the isostructural Ni[Au(CN)(2)](2)(DMSO)(2) product. Co[Au(CN)(2)](2)(DMSO)(2) and M[Au(CN)(2)](2)(DMF)(2) (M = Co, Ni) complexes have flat 2-D square-grid layer structures with trans-bound DMSO or DMF units; they are formed via vapour absorption by solid M(μ-OH(2))[Au(CN)(2)](2) and from DMSO or DMF solution synthesis. Co[Au(CN)(2)](2)(pyridine)(4) is generated via vapour absorption by Co(μ-OH(2))[Au(CN)(2)](2); the analogous Ni complex is synthesized by immersion of Ni(μ-OH(2))[Au(CN)(2)](2) in 4% aqueous pyridine. Similar immersion of Co(μ-OH(2))[Au(CN)(2)](2) yielded Co[Au(CN)(2)](2)(pyridine)(2), which has a flat 2-D square-grid structure with trans-pyridine units. Absorption of pyridine vapour by solid Ni(μ-OH(2))[Au(CN)(2)](2) was incomplete, generating a mixture of pyridine-bound complexes. Analyte-free Co[Au(CN)(2)](2) was prepared by dehydration of Co(μ-OH(2))[Au(CN)(2)](2) at 145 °C; it has a 3-D diamondoid-type structure and absorbs DMSO, DMF and pyridine to give the same materials as by vapour absorption from the hydrate.

No MeSH data available.


Related in: MedlinePlus