A photochemical on-off switch for tuning the equilibrium mixture of H 2 nuclear spin isomers as a function of temperature

Journal article
(Original article)


Publication Details

Author(s): Frunzi M, Jockusch S, Chen JYC, Krick Calderon R, Lei X, Murata Y, Komatsu K, Guldi DM, Lawler RG, Turro NJ
Journal: Journal of the American Chemical Society
Publisher: American Chemical Society
Publication year: 2011
Volume: 133
Journal issue: 36
Pages range: 14232-14235
ISSN: 0002-7863


Abstract


The photochemical interconversion of the two allotropes of the hydrogen molecule [para-H (pH) and ortho-H (oH )] incarcerated inside the fullerene C (pH @C and oH@C, respectively) is reported. Photoexcitation of H@C generates a fullerene triplet state that serves as a spin catalyst for pH/oH conversion. This method provides a means of changing the pH/oH ratio inside C by simply irradiating H @C at different temperatures, since the equilibrium ratio is temperature-dependent and the electronic triplet state of the fullerene produced by absorption of the photon serves as an "on-off" spin catalyst. However, under comparable conditions, no photolytic pH /oH interconversion was observed for H @C, which was rationalized by the significantly shorter triplet lifetime of H@C relative to H @C. © 2011 American Chemical Society.



FAU Authors / FAU Editors

Guldi, Dirk Michael Prof. Dr.
Lehrstuhl für Physikalische Chemie I
Krick Calderon, Rafael
Sonderforschungsbereich 583 Redoxative Metallkomplexe - Reaktivitätssteuerung durch molekulare Architekturen (Sprecher: Prof.Dr.Kisch)


Additional Organisation
Interdisziplinäres Zentrum für Molekulare Materialien


External institutions
Brown University
Columbia University
Fukui University of Technology / 福井工業大学
Kyoto University / 京都大学 Kyōto daigaku


How to cite

APA:
Frunzi, M., Jockusch, S., Chen, J.Y.-C., Krick Calderon, R., Lei, X., Murata, Y.,... Turro, N.J. (2011). A photochemical on-off switch for tuning the equilibrium mixture of H 2 nuclear spin isomers as a function of temperature. Journal of the American Chemical Society, 133(36), 14232-14235. https://dx.doi.org/10.1021/ja206383n

MLA:
Frunzi, Michael, et al. "A photochemical on-off switch for tuning the equilibrium mixture of H 2 nuclear spin isomers as a function of temperature." Journal of the American Chemical Society 133.36 (2011): 14232-14235.

BibTeX: 

Last updated on 2019-11-04 at 14:53