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| Content Provider | Springer Nature Link |
|---|---|
| Author | Xu, Jingjing Lu, Yidong Liu, Baohong Xu, Chunhe Kong, Jilie |
| Copyright Year | 2007 |
| Abstract | An ultrathin, ordered, and packed protein film, consisting of the 2-mercaptoacetic acid (MAA), polydimethyldiallylammonium chloride (PDDA), and wild-type (WT) photosynthetic reaction center (RC; termed as WT-RC) or its pheophytin (Phe)-replaced counterpart (termed as Phe-RC), was fabricated by self-assembling technique onto gold electrode for facilitating the electron transfer (ET) between RC and the electrode surface. Near-infrared (NIR)-visible (Vis) absorption and fluorescence (FL) emission spectra revealed the influence of pigment substitution on the cofactors arrangement and excitation relaxation of the proteins, respectively. Square wave voltammetry (SWV) and photoelectric tests were employed to systematically address the differences between the WT-RC films and mutant ones on the direct and photo-induced ET. The electrochemical results demonstrated that ET initiated by the oxidation of the primary donor (P) was obviously slowed down, and the formed P+ had more population as well as more positive redox potential in the Phe-RC films compared with those in the WT ones. The photoelectrochemical results displayed the dramatically enhanced photoelectric performances of the mutant ones, further suggesting the slow-down formation of final charge-separated state in Phe-RC. The functionalized protein films introduced in this paper provided an efficient approach to sensitively probe the redox cofactors and ET differences resulting from only minor changes in pigment arrangement in the pigment–protein complex. The favored ET process observed for the membrane proteins RC was potentially valuable for a deep understanding of the multi-step biological ET process and development of versatile bioelectronic devices. |
| Starting Page | 1689 |
| Ending Page | 1695 |
| Page Count | 7 |
| File Format | |
| ISSN | 14328488 |
| Journal | Journal of Solid State Electrochemistry |
| Volume Number | 11 |
| Issue Number | 12 |
| e-ISSN | 14330768 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2007-05-23 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Photosynthetic reaction center Self-assembled monolayers Electron transfer Square wave voltammetry Photocurrent Electronic and Computer Engineering Condensed Matter Characterization and Evaluation of Materials Industrial Chemistry/Chemical Engineering Analytical Chemistry Physical Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Materials Science Electrical and Electronic Engineering Electrochemistry |
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