Significance
The light-driven generation of H
2
, the reductive side of water splitting, requires a light absorber or photosensitizer (PS) for electron-hole creation and photoinduced electron transfer. To increase the effectiveness of charge transfer chromophores as PSs, this report describes the attachment of a strongly absorbing organic dye (dipyrromethene-BF
2
, commonly known as Bodipy) to Pt diimine dithiolate charge transfer chromophores and examination of systems containing these dyads for the light-driven generation of H
2
. The use of these dyads increases system activity under green light irradiation (530 nm) relative to systems with either chromophore alone, validating such an approach in designing artificial photosynthetic systems. One dyad system exhibits both high activity and substantial durability (40,000 turnovers relative to PSs over 12 d).
标题: 重要性
光驱动的H2生成,即水分裂的还原端,需要光吸收剂或光敏剂(PS)来产生电子-空穴并进行光诱导电子转移。为了增加电荷转移色素作为光敏剂的有效性,本报告描述了将强吸收的有机染料(二吡咯甲烷-BF2,通常称为Bodipy)附着到Pt二亚甲基二硫酸盐电荷转移色素上,并检查包含这些二聚体的系统对光驱动的H2生成的影响。使用这些二聚体在绿光照射(530 nm)下增加了系统活性,相对于仅有色素的系统,验证了这种设计人工光合系统的方法。其中一种二聚体系统表现出高活性和相当的耐久性(相对于PS在12天内的40,000次循环)。