人工分子能模仿自然光合作用，为太阳能转化为碳中和燃料开辟新路径

Core Insights - A research team from the University of Basel in Switzerland has made significant advancements in artificial photosynthesis by developing a new type of artificial molecule that mimics the natural photosynthesis mechanism of plants, capable of storing two positive and two negative charges under light conditions [1][2] - This breakthrough offers new possibilities for converting solar energy into carbon-neutral fuels, which is a crucial direction for future clean energy [1] Group 1: Research Findings - The artificial molecule consists of five functional units, each responsible for specific tasks, with one end containing two units that can release electrons, resulting in a positive charge, and the other end having two units that can receive electrons, resulting in a negative charge [1] - The core structure of the molecule absorbs light energy and initiates the electron transfer reaction, which is essential for the process [1] Group 2: Methodology - The team employed a two-step light exposure method to achieve the storage of four charges, where the first flash excites the molecule, triggering electron transfer and generating a pair of positive and negative charges, which then migrate to opposite ends of the molecule [2] - A second flash induces the same reaction, allowing the molecule to ultimately carry two positive and two negative charges, enabling the process to occur under weaker light conditions, closer to natural sunlight intensity [2] Group 3: Implications - The separated charges within the molecule can maintain a relatively stable state for a sufficient duration to participate in subsequent chemical reactions, such as the decomposition of water into hydrogen and oxygen, which is a key step in producing solar fuels [2] - This research enhances the understanding of the electron transfer mechanisms in artificial photosynthesis and lays the groundwork for designing more efficient solar fuel conversion technologies that are closer to natural systems [2]