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A series of proof-of-concept models with different degrees of hydration in the same donor–acceptor system were obtained through a functional motif-oriented structural design and screening strategy. The effect of water molecules on photoinduced electron transfer was explored from a crystallographic perspective for the first time. The reasons for the structural differences caused by different degrees of hydration were also discussed. [ABSTRACT FROM AUTHOR]

A new design strategy through the synergy of Mo(VI)–Mo(V) intervalence charge transfer and π(radical)–π(radical/cation) interactions is proposed to obtain semiconductors with photoresponsive ranges covering the whole UV–SWIR (ultraviolet–shortwave near-infrared; ca. 250–3000 nm) region. With this strategy, a viologen-based molybdate semiconductor with a UV–SWIR photoresponsive range was obtained through UV/X-ray irradiation or thermal annealing. The thermally annealed semiconductor has the highest conversion and the best photocurrent response in the range of 355–2400 nm. [ABSTRACT FROM AUTHOR]