Laser Plasma Production of Metal−Corannulene Ion−Molecule Complexes

Abstract

Gas-phase metal-corannulene ion-molecule complexes are produced by covaporization of materials in a laser plasma source and detected using a time-of-flight mass spectrometer. This is achieved by mixing metal, metal oxide, or organometallic powders with corannulene powder and covaporizing the mixture with 532 nm laser light. The mass spectra obtained reveal that transition metals and rare earths efficiently produce mono-and di-ligand complexes of the form M + (cora) n , with n ) 1, 2. Metal oxides are found to produce the monoligand complex with high efficiency. Covaporization of the organometallic π-complex iron cyclopentadienyl benzene with corannulene yielded both homoligand and heteroligand corannulene complexes. The binding energy of the iron cation to corannulene is suggested to be greater than its binding energy to benzene but less than its binding energy to cyclopentadiene.

A molecular bowl sumanene

“…To date, some coordination complexes of p bowls (mainly corannulene) have been prepared and characterized. 30,[67][68][69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85] A convex binding is demonstrated by the X-ray crystal structures in some monometallated corannulene complexes including Z 1 , 79 Z 2 , 78 and Z 6 -coordination modes. 76,80,85 Recent theoretical studies of corannulene complexes and their derivatives using DFT calculation have also been carried out to indicate the preferential convex binding to transition metals.…”

Probing the binding sites and coordination limits of buckybowls in a solvent-free environment: Experimental and theoretical assessment

“…By comparing that with the bare Fe + -ion, it was revealed that the presence of corannulene led to enhancements in reactivity of up to 5 orders of magnitude in room temperature reactions. A few years later, Duncan and co-workers [10] investigated the gas-phase corannulene complexes of transition (Ti, V, Cr, Fe) and actinide (U) metals, as well as their oxides produced by co-vaporization of materials by a laser plasma source. The time-of-flight mass spectra revealed that metals yield mono-and di-ligand complexes in the form of [M(C 20 H 10 ) n ] + (n = 1 or 2), while their oxides efficiently produce mono-adducts.…”

Probing the Structural, Bonding, and Magnetic Properties of Cobalt Coordination Complexes: Co–Benzene, Co–Pyridine, and Co–Pyrimidine

“…Motivated by both this imbalance and the absence of any studies on Co−benzene or Co−azabenzene complexes, we performed a systematic study on neutral and negatively charged Co 1,2 (benzene) 1,2 , Co 1,2 (pyridine) 1,2 , and Co 1,2 (pyrimidine) 1,2 in the framework of DFT. Here, we choose pyrimidine to investigate due to it having the highest aromaticity 36 and lowest relative energies 37 among the three types of diazines.…”