Energy transfer in molecular layer-by-layer films of water-soluble perylene diimides
Tang, T; Herrmann, A; Peneva, K; Müllen, K; Webber, SE
| HERO ID | 3575855 |
|---|---|
| In Press | No |
| Year | 2007 |
| Title | Energy transfer in molecular layer-by-layer films of water-soluble perylene diimides |
| Authors | Tang, T; Herrmann, A; Peneva, K; Müllen, K; Webber, SE |
| Journal | Langmuir |
| Volume | 23 |
| Issue | 8 |
| Page Numbers | 4623-4628 |
| Abstract | Multilayer films of water-soluble anionic and cationic perylene diimide (PDI) moieties have been prepared using the molecular layer-by-layer method described in an earlier publication (Tang, T. J.; Qu, J. Q.; Müllen, K.; Webber, S. E. Langmuir 2006, 22, 26-28) and the fluorescence intensity compared with and without a base layer prepared using an anionic terrylene diimide dye (n-TDI), which serves as an energy-trapping layer for the PDI exciton. The fluorescence quenching data could be fit equally well to a modification of a model used by Kuhn to describe energy transfer from a J aggregate or a model developed by Kenkre and Wong to describe excitonic transfer. For both models, we obtain a characteristic energy-transfer distance on the order of 5.4 nm. Fluorescence quenching of the PDI via a single Förster energy-transfer step to the n-TDI layer is ruled out on the basis of the observed power-law dependence. We also consider a model in which the excitation is trapped at the outermost surface. This model provides a reasonable fit to the data only if the Kuhn relationship is used. |
| Doi | 10.1021/la0634903 |
| Pmid | 17352502 |
| Wosid | WOS:000245370100073 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Language Text | English |