Abstract
Understanding the fundamental spin dynamics of photoexcited pentacene derivatives is important in order to maximize their potential for optoelectronic applications. Herein, we report on the synthesis of two pentacene derivatives that are functionalized with the [(2,2,6,6-tetramethylpiperidin-1-yl)oxy] (TEMPO) stable free radical. The presence of TEMPO does not quench the pentacene singlet excited state, but does quench the photoexcited triplet excited state as a function of TEMPO-to-pentacene distance. Time-resolved electron paramagnetic resonance experiments confirm that triplet quenching is accompanied by electron spin polarization transfer from the pentacene excited state to the TEMPO doublet state in the weak coupling regime.
| Original language | English |
|---|---|
| Pages (from-to) | 857-863 |
| Number of pages | 7 |
| Journal | Journal of the American Chemical Society |
| Volume | 137 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Jan 21 2015 |
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ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
- Biochemistry
- Colloid and Surface Chemistry
- Medicine(all)
Cite this
Pentacene appended to a TEMPO stable free radical : The effect of magnetic exchange coupling on photoexcited pentacene. / Chernick, Erin T.; Casillas, Rubén; Zirzlmeier, Johannes; Gardner, Daniel M.; Gruber, Marco; Kropp, Henning; Meyer, Karsten; Wasielewski, Michael R; Guldi, Dirk M.; Tykwinski, Rik R.
In: Journal of the American Chemical Society, Vol. 137, No. 2, 21.01.2015, p. 857-863.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Pentacene appended to a TEMPO stable free radical
T2 - The effect of magnetic exchange coupling on photoexcited pentacene
AU - Chernick, Erin T.
AU - Casillas, Rubén
AU - Zirzlmeier, Johannes
AU - Gardner, Daniel M.
AU - Gruber, Marco
AU - Kropp, Henning
AU - Meyer, Karsten
AU - Wasielewski, Michael R
AU - Guldi, Dirk M.
AU - Tykwinski, Rik R.
PY - 2015/1/21
Y1 - 2015/1/21
N2 - Understanding the fundamental spin dynamics of photoexcited pentacene derivatives is important in order to maximize their potential for optoelectronic applications. Herein, we report on the synthesis of two pentacene derivatives that are functionalized with the [(2,2,6,6-tetramethylpiperidin-1-yl)oxy] (TEMPO) stable free radical. The presence of TEMPO does not quench the pentacene singlet excited state, but does quench the photoexcited triplet excited state as a function of TEMPO-to-pentacene distance. Time-resolved electron paramagnetic resonance experiments confirm that triplet quenching is accompanied by electron spin polarization transfer from the pentacene excited state to the TEMPO doublet state in the weak coupling regime.
AB - Understanding the fundamental spin dynamics of photoexcited pentacene derivatives is important in order to maximize their potential for optoelectronic applications. Herein, we report on the synthesis of two pentacene derivatives that are functionalized with the [(2,2,6,6-tetramethylpiperidin-1-yl)oxy] (TEMPO) stable free radical. The presence of TEMPO does not quench the pentacene singlet excited state, but does quench the photoexcited triplet excited state as a function of TEMPO-to-pentacene distance. Time-resolved electron paramagnetic resonance experiments confirm that triplet quenching is accompanied by electron spin polarization transfer from the pentacene excited state to the TEMPO doublet state in the weak coupling regime.
UR - http://www.scopus.com/inward/record.url?scp=84921499330&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84921499330&partnerID=8YFLogxK
U2 - 10.1021/ja510958k
DO - 10.1021/ja510958k
M3 - Article
VL - 137
SP - 857
EP - 863
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 2
ER -