Photoassisted Magnetization of Fullerene C-60 with Magnetic-Field Trapped Raman Scattering
2012 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 134, no 2, 1130-1135 p.Article in journal (Refereed) Published
We report a photoassisted method to magnetize microcrystal fullerene C-60 at room temperature by exciting it to triplet states via a proper laser radiation and then trapping the spin-polarized states under a strong magnetic field. Novel changes on Raman scattering of the C-60 microcrystals were observed in the presence and absence of the magnetic field. In particular, the Raman spectra were found to exhibit a "hysteresis" phenomenon when the external magnetic field was removed. In light of this, we propose magnetic-field-trapped Raman spectroscopy (MFTRS) and employ first-principle calculations to reproduce the Raman activities of C-60 at different states. Further, MFTRS of the fullerene is demonstrated to originate from its photoassisted magnetization (PAM). The PAM strategy enables the magnetization of materials which consist of only light elements; meanwhile, the MFTRS investigation may open a new research field in Raman spectroscopy.
Place, publisher, year, edition, pages
2012. Vol. 134, no 2, 1130-1135 p.
IdentifiersURN: urn:nbn:se:kth:diva-93020DOI: 10.1021/ja209107uISI: 000301084300071ScopusID: 2-s2.0-84855947712OAI: oai:DiVA.org:kth-93020DiVA: diva2:514841
QC 201204112012-04-112012-04-102012-04-11Bibliographically approved