TY - JOUR
T1 - Synthesis and Characterization of Heterometallic Rings Templated through Alkylammonium or Imidazolium Cations
AU - Alotaibi, Rajeh
AU - Booth, Amy
AU - Little, Edmund
AU - Brookfield, Adam
AU - Achari, Amritroop
AU - Lockyer, Selena J.
AU - Timco, Grigore A.
AU - Whitehead, George F. S.
AU - Vitorica-Yrezabal, Inigo
AU - Chilton, Nicholas F.
AU - Nair, Rahul R.
AU - Collison, David
AU - Winpenny, Richard E. P.
PY - 2023/5/17
Y1 - 2023/5/17
N2 - We report the synthesis and structural characterization of a series of heterometallic rings templated via alkylammonium or imidazolium cations. The template and preference of each metal’s coordination geometry can control the structure of heterometallic compounds, leading to octa-, nona-, deca-, dodeca-, and tetradeca-metallic rings. The compounds were characterized by single-crystal X-ray diffraction, elemental analysis, magnetometry, and EPR measurements. Magnetic measurements show that the exchange coupling between metal centres is antiferromagnetic. EPR spectroscopy shows that the spectra of {Cr7Zn} and {Cr9Zn} have S = 3/2 ground states, while the spectra of {Cr12Zn2} and {Cr8Zn} are consistent with S = 1 and 2 excited states. The EPR spectra of {(ImidH)-Cr6Zn2}, {(1-MeImH)-Cr8Zn2}, and {(1,2-diMeImH)-Cr8Zn2} include a combination of linkage isomers. The results on these related compounds allow us to examine the transferability of magnetic parameters between compounds.
AB - We report the synthesis and structural characterization of a series of heterometallic rings templated via alkylammonium or imidazolium cations. The template and preference of each metal’s coordination geometry can control the structure of heterometallic compounds, leading to octa-, nona-, deca-, dodeca-, and tetradeca-metallic rings. The compounds were characterized by single-crystal X-ray diffraction, elemental analysis, magnetometry, and EPR measurements. Magnetic measurements show that the exchange coupling between metal centres is antiferromagnetic. EPR spectroscopy shows that the spectra of {Cr7Zn} and {Cr9Zn} have S = 3/2 ground states, while the spectra of {Cr12Zn2} and {Cr8Zn} are consistent with S = 1 and 2 excited states. The EPR spectra of {(ImidH)-Cr6Zn2}, {(1-MeImH)-Cr8Zn2}, and {(1,2-diMeImH)-Cr8Zn2} include a combination of linkage isomers. The results on these related compounds allow us to examine the transferability of magnetic parameters between compounds.
U2 - 10.1039/D3DT00982C
DO - 10.1039/D3DT00982C
M3 - Article
SN - 1477-9226
JO - Dalton Transactions
JF - Dalton Transactions
ER -