title: Switching from Ru to Fe: picosecond IR spectroscopic investigation of the potential of the (fulvalene)tetracarbonyldiiron frame for molecular solar-thermal storage.
abstract: A foray into the exploration of Fe analogues of the (fulvalene)tetracarbonyldiruthenium [FvRu2(CO)4] solar-thermal storage system 1⇆2 is described. It was facilitated by the development of a convenient synthetic access to the parent [FvFe2(CO)4] 3a and the more soluble di(tert-butyl)fulvalene derivatives 3c and d. Laboratory time scale irradiations (>400 nm) fail to induce photoisomerization, an observation that is explained by the results of time-resolved IR experiments. They show that photoexcitation generates only the short-lived singlet syn biradical of 3 (and a small amount of decarbonylation product), in the absence of the corresponding triplet species required for the occurrence of rearrangement to 4.
authors.affiliation: Department of Chemistry, University of California at Berkeley, Berkeley, CA 94720-1460, USA.
authors.forename: Zongrui
authors.initials: Z
authors.lastname: Hou
authors.forename: Son C
authors.initials: SC
authors.lastname: Nguyen
authors.forename: Justin P
authors.initials: JP
authors.lastname: Lomont
authors.forename: Charles B
authors.initials: CB
authors.lastname: Harris
authors.forename: Nikolai
authors.initials: N
authors.lastname: Vinokurov
authors.forename: K Peter C
authors.initials: KP
authors.lastname: Vollhardt
mesh_terms: D011211:Electric Power Supplies; D007501:Iron / Q000737:chemistry*; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011789:Quantum Theory; D012428:Ruthenium / Q000737:chemistry*; D012993:Solar Energy; D013055:Spectrophotometry, Infrared; D013696:Temperature; D013997:Time Factors
chemical_list: D009942:Organometallic Compounds; D012428:Ruthenium; D007501:Iron