Though there have been many studies on photosensitizers coupled to model complexes of the [FeFe]-hydrogenases, few have looked at how the models react upon exposure to light. To extract photoreaction information, ultrafast time-resolved UV/visible pump, IR probe spectroscopy was performed on Fe₂(μ-S₂C₂H₄)(CO)₄(PMe₃)₂ (2b) dissolved in heptane and acetonitrile and the photochemical dynamics were determined. Excitation with 532 and 355 nm light produces bleaches and new absorptions that decay to half their original intensity with time constants of 300 ± 120 ps and 380 ± 210 ps in heptane and acetonitrile, respectively. These features persist to the microsecond timescale. The dynamics of 2b are assigned to formation of an initial set of photoproducts, which were a mixture of excited-state tricarbonyl isomers. These isomers decay into another set of long-lived photoproducts in which approximately half the excited-state tricarbonyl isomers recombine with CO to form another complex mixture of tricarbonyl and tetracarbonyl isomers.

尽管有许多关于光敏剂与[FeFe]氢化酶模型复合物偶联的研究，但很少有人研究模型在暴露于光线下的反应。以提取光反应信息，超快时间分辨UV /可见光泵，IR探测器光谱对Fe进行₂（μ-S ₂ c ^ ₂ ^ h ₄）（CO）₄（PME ₃）₂（2b中）溶解于庚烷和乙腈中，测定其光化学动力学。在532和355 nm的光下激发会产生漂白和新的吸收，衰减逐渐降低至其原始强度的一半，在庚烷和乙腈中的时间常数分别为300±120 ps和380±210 ps。这些功能会持续到微秒级的时标。2b的动力学被指定为形成光产物的初始集合，该光产物是激发态三羰基异构体的混合物。这些异构体分解成另一组长寿命的光产物，其中约一半的激发态三羰基异构体与CO结合形成另一种三羰基和四羰基异构体的复杂混合物。