Fluorescence Photoswitching in Polymer Matrix: Mutual Influence between Photochromic and Fluorescent Molecules by Energy Transfer Processes
Metivier, R; Badre, S; Meallet-Renault, R; Yu, Pei; Pansu, RB; Nakatani, K
| HERO ID | 3575814 |
|---|---|
| In Press | No |
| Year | 2009 |
| Title | Fluorescence Photoswitching in Polymer Matrix: Mutual Influence between Photochromic and Fluorescent Molecules by Energy Transfer Processes |
| Authors | Metivier, R; Badre, S; Meallet-Renault, R; Yu, Pei; Pansu, RB; Nakatani, K |
| Journal | Journal of Physical Chemistry C |
| Volume | 113 |
| Issue | 27 |
| Page Numbers | 11916-11926 |
| Abstract | The fluorescence photoswitching of photochrome-fluorophore (PF) mixtures based on 1,2-bis(5'-ethoxy-2'(2 ''-pyridyl) thiazolyl) perfluorocyclopentene (P) and pyrromethene 597 (F) were studied. Polymethylmethracrylate (PMMA) films were fabricated with respective concentrations of 1.0 x 10(-2) mol L-1 for P, and 9.2 x 10(-4) and 9.2 x 10(-1) mol L-1 for F. By alternate UV (lambda(OF) = 334 nm) and visible (lambda(CF) = 547 nm) irradiations, inducing the reaction between the opened (P-OF) and closed (P-CF) forms of P, both fluorescence intensity and lifetime can be reversibly modified and visualized in the micrometer scale by fluorescence imaging. Switching (writing/erasing) and reading functions are respectively borne by P and F. The interaction between the two units owes to an energy transfer based quenching of fluorescence, which operates in the P-CF state but not P-OF. The reading process alters only very weakly the state of P. During the writing process, the presence of F accelerates the P-CF to P-OF reaction, as evidenced by following the absorption spectrum change. The efficiency of the energy transfer was determined by Gosele's model for the two concentrations of F and for concentrations of P-CF from 0 to 1.0 x 10(-2) mol L-1. This model fits well with the experimental fluorescence intensity change during the photoreaction and can account for the origin of the above-mentioned acceleration. In addition, we demonstrated that switching one molecule of P-OF to P-CF could quench up to eight molecules of F. This "amplification" of the fluorescence signal was modeled as a function of the concentrations of both species, providing a tool to optimize the PF system composition. |
| Doi | 10.1021/jp902344x |
| Wosid | WOS:000267694900066 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |