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د. راجح بن ذيب العتيبي

Assistant Professor

أستاذ مساعد

كلية العلوم
مبنى ٥ - الدور الثاني - المكتب ٢أ/١٠٠
raalotaibi
بحث و منشور
مقال فى مجلة
2023

Synthesis and characterization of heterometallic rings templated through alkylammonium or imidazolium cations

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

نوع عمل المنشور
دكتوراة
مزيد من بحث و منشور
publications

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…

بواسطة Rajeh Alotaibi
2023
publications

Addition of 1,4,8,11-tetrazacyclotetradecane (cyclam) to a reaction that produces octametallic rings when simpler amines are used, produces {Cr11M2} “pretzels” (M = ZnII or CuII) where the cyclam…

بواسطة Rajeh Alotaibi
2022
تم النشر فى:
Rajeh Alotaibi