Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, 335 Science Road, Daejeon 305-701 (Republic of Korea).
Angew Chem Int Ed Engl. 2014 Jun 16;53(25):6364-8. doi: 10.1002/anie.201402608. Epub 2014 Apr 1.
We report on the capability of polydopamine (PDA), a mimic of mussel adhesion proteins, as an electron gate as well as a versatile adhesive for mimicking natural photosynthesis. This work demonstrates that PDA accelerates the rate of photoinduced electron transfer from light-harvesting molecules through two-electron and two-proton redox-coupling mechanism. The introduction of PDA as a charge separator significantly increased the efficiency of photochemical water oxidation. Furthermore, simple incorporation of PDA ad-layer on the surface of conducting materials, such as carbon nanotubes, facilitated fast charge separation and oxygen evolution through the synergistic effect of PDA-mediated proton-coupled electron transfer and the high conductivity of the substrate. Our work shows that PDA is an excellent electron acceptor as well as a versatile adhesive; thus, PDA constitutes a new electron gate for harvesting photoinduced electrons and designing artificial photosynthetic systems.
我们报告了聚多巴胺（PDA）作为电子门以及模仿自然光合作用的通用粘合剂的能力，聚多巴胺模拟贻贝类黏附蛋白。这项工作表明，PDA 通过双电子和双质子氧化还原偶联机制加速了从光捕获分子到光致电子转移的速率。通过引入 PDA 作为电荷分离器，显著提高了光化学水氧化的效率。此外，通过将 PDA 吸附层简单地掺入到导电材料（如碳纳米管）的表面上，通过 PDA 介导的质子耦合电子转移和基底的高导电性的协同作用，促进了快速的电荷分离和氧气释放。我们的工作表明，PDA 是一种极好的电子受体以及通用粘合剂；因此，PDA 构成了一种用于收集光致电子和设计人工光合作用系统的新型电子门。
