Photoisomerization of a Fullerene Dimer

详细信息    查看全文

• 作者：Jinying Zhang ; Kyriakos Porfyrakis ; John J. L. Morton ; Mark R. Sambrook ; Jeffrey Harmer ; Li Xiao ; Arzhang Ardavan ; G. Andrew D. Briggs
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：February 28, 2008
• 年：2008
• 卷：112
• 期：8
• 页码：2802 - 2804
• 全文大小：94K
• 年卷期：v.112,no.8(February 28, 2008)
• ISSN：1932-7455

文摘

A photo-switchable fullerene dimer and its analogous nitrogen endohedral species have been synthesized andcharacterized. Irradiation by ultraviolet and visible light has been used to switch between the trans and cisisomers of both the C₆₀- and N@C₆₀- based dimers. Environmental perturbations experienced by theencapsulated nitrogen atom upon switching between the two isomers in degassed carbon disulfide has beendetermined by pulse electron paramagnetic resonance. Both T₁ and T₂ electron spin relaxation times of thetwo isomers of the endohedral fullerene containing dimer revealed a biexponential decay. Although the zerofield splitting parameter D_eff for both isomers in solution was similar, around 13.0 MHz, the molecular rotationcorrelation time _c of the trans and cis isomers was calculated to be 37.2 ± 1.6 and 34.8 ± 2.7 ps, respectively.