Ruthenoarenes versus phenol derivatives as axial linkers for subporphyrazine dimers and trimers

Caballero E, Nieto CR, Strauß V, Salome Rodriguez-Morgade M, Guldi DM, Sessler JL, Torres T (2014)


Publication Type: Journal article, Original article

Publication year: 2014

Journal

Original Authors: Caballero E., Romero-Nieto C., Strauss V., Rodriguez-Morgade M.S., Guldi D.M., Sessler J.L., Torres T.

Publisher: Wiley-VCH Verlag

DOI: 10.1002/chem.201304622

Abstract

The subporphyrazine (SubPz) dimer diboron(III) [μ-1',4'-benzenediolato][bis-(1,2,6,7,11,12-hexapropylsubporphyrazinato)] (2) and trimer triboron(III)[μ-1',3',5'-benzenetriolato][tris-(1,2,6,7,11,12-hexapropylsubporphyrazinato)] (4), consisting of SubPz units assembled through their axial positions by hydroquinone- and phloroglucinol-linkers, respectively, have been prepared. Selective ruthenium-π-coordination to the linking aromatic rings afforded SubPz arrays 8 and 9, respectively. These latter systems displayed different degrees of electronic communication between the macrocycles relative to 2 and 4 as inferred from analyses of the ground- and excited-state features. For instance, as revealed by time-resolved pump probe transient absorption spectroscopy, the excited singlet states of dimer 2 and trimer 4 undergo rather rapid deactivation. In contrast, the presence of a ruthenoarene linker, as in 8 and 9, serves to increase the SubPz singlet excited state lifetimes; these now reach values similar to those seen in the case of monomeric SubPz compounds that either do or do not contain ruthenoarene subunits (i.e., 7 and 6, respectively). These findings are ascribed to the redox active nature of the hydroquinone and phloroglucinol linkers in 2 and 4 and a change in the electronics that results from organometallic functionalization. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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APA:

Caballero, E., Nieto, C.R., Strauß, V., Salome Rodriguez-Morgade, M., Guldi, D.M., Sessler, J.L., & Torres, T. (2014). Ruthenoarenes versus phenol derivatives as axial linkers for subporphyrazine dimers and trimers. Chemistry - A European Journal. https://dx.doi.org/10.1002/chem.201304622

MLA:

Caballero, Esmeralda, et al. "Ruthenoarenes versus phenol derivatives as axial linkers for subporphyrazine dimers and trimers." Chemistry - A European Journal (2014).

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