The role of environment in the nonradiative relaxation of the triplet state of naphthalene derivatives in solid solutions at 77 K

Intramolecular Excimer Formation in a Naphthalene-Appended Dinuclear Iron−Oxo Complex

“…The lifetime of the fast component is within experimental error of the S 0 ← S 1 fluorescence lifetime, allowing us to assign this feature to S n ← S 1 absorption(s) of the singlet excited state of 1 . On the basis of its long lifetime and spectral profile as compared to other reports in the literature, − ,− the 48 μs species is assigned as a triplet excited state of 1 , most likely T 1 . In contrast to the reasonably strong signals obtained for 1 , transient absorption signals for 3 were found to be extremely weak .…”

“…Structure and Basic Physical Properties of [Fe 2 (O)(O 2 CCH 2 C 10 H 7 ) 2 (TACN-Me 3 ) 2 ](PF 6 ) 2 . The choice of naphthalene as a donor for this system was largely motivated by the ready availability of 2-naphthylacetic acid and the fact that the photophysics of naphthalene has been thoroughly documented. ,− To further simplify these initial photophysical studies, we also replaced Tp with TACN-Me 3 as the capping ligand for the cluster . The synthesis of [Fe 2 (O)(O 2 CCH 2 C 10 H 7 ) 2 (TACN-Me 3 ) 2 ](PF 6 ) 2 ( 3 ) was accomplished using modified literature procedures 23 and proceeded with good yield.…”