WO_3–x (W-1) was used to achieve controllable photoisomerization of linear olefins without substituents under 625 nm light irradiation. Thermodynamic and kinetic isomers were obtained by regulating the carbon chain length of the olefins. Terminal olefins were converted into isomerized products, and the internal olefin mixtures present in petroleum derivatives were transformed into valuable pure olefin products. Oxygen vacancies (OVs) in W-1 altered the electronic structure of W-1 to improve its light-harvesting ability, which accounted for the high activity of olefin isomerization under light irradiation up to 625 nm. Additionally, OVs on the W-1 surface generated unsaturated W⁵⁺ sites that coordinated with olefins for the efficient adsorption and activation of olefins. Mechanistic studies reveal that the in situ formation of surface π-complexes and π-allylic W intermediates originating from the coordination of coordinated unsaturated W⁵⁺ sites and olefins ensure high photocatalytic activity and selectivity of W-1 for the photocatalytic isomerization of olefins via a radical mechanism.

WO _{3– x} (W-1) 用于在625 nm 光照射下实现无取代基的线性烯烃的可控光异构化。通过调节烯烃的碳链长度获得热力学和动力学异构体。末端烯烃转化为异构化产物，石油衍生物中存在的内烯烃混合物转化为有价值的纯烯烃产品。W-1 中的氧空位 (OVs) 改变了 W-1 的电子结构以提高其捕光能力，这说明了在高达 625 nm 的光照射下烯烃异构化的高活性。此外，W-1 表面上的 OVs 产生了不饱和的 W ⁵⁺与烯烃协调有效吸附和活化烯烃的位点。机理研究表明，在原位从协调的不饱和W的协调形成表面π络合物和π-烯丙基W¯¯中间体原产⁵⁺网站和烯烃确保W-1的高光催化活性和选择性烯烃的光催化异构化通过一激进的机制。