The syntheses of trans-[Ru{4,4′-CtCC6H2[2,5-(OEt)2]CtCC6H4NO2}Cl(dppm)2] (19), trans-[Ru{4,4′,4′′-CtCC6H4CtCC6H2[2,5-(OEt)2]CtCC6H4NO2}Cl(dppm)2] (20), trans-[Ru{4,4′,4′′,4′′′-CtCC6H4-CtCC6H2[2,5-(OEt)2]CtCC6H2[2,5-(OEt)2]CtCC6H4NO2}Cl(dppe)2] (21), trans-[Ru{4,4′,4′′,4′′′- CtCC6H4-CtCC6H2[2,5-(OEt)2]CtCC6H2[2,5-(OEt)2]CtCC6H4NO2}Cl(dppm)2] (22), trans-[Ru{4,4′,4′′,4′′′-CtCC6H4CtCC6H4CtCC6H2[2,5-(OEt)2]CtCC6H4NO2}Cl(dppm)2] (23), and trans-[Ru{4,4′,4′′,4′′′,4′′′′-CtCC6H4-CtCC6H4CtCC6H2[2,5-(OEt)2]CtCC6H2[2,5-(OEt)2]CtCC6H4NO2}Cl(dppm)2] (24) are reported, together with those of precursor alkynes, complexes with the donor-π-bridge-acceptor formulation that affords efficient quadratic and cubic NLO compounds; the identity of 19 was confirmed by a structural study. The electrochemical properties of 19-24 and related complexes with shorter π-bridge ligands were assessed by cyclic voltammetry, and the linear optical, quadratic nonlinear optical, and cubic nonlinear optical properties were assayed by UV-vis-NIR spectroscopy, hyper-Rayleigh scattering studies at 1064 and 1300 nm, and broad spectral range femtosecond Z-scan studies, respectively. The RuII/III oxidation potentials and wavelengths of the optical absorption maxima decrease on π-bridge lengthening, until the tri(phenyleneethynylene) complex is reached, further chain lengthening leaving these parameters invariant; theoretical studies employing time-dependent density functional theory have shed light on this behavior. The quadratic nonlinearity 1064 and two-photon absorption cross-section reach maximal values at this same π-bridge length, a similar saturation behavior that may reflect a common importance of ruthenium-to-alkynyl ligand charge transfer in electronic and optical behavior in these molecules.
Length-Dependent Convergence and Saturation Behavior of Electrochemical, Linear Optical, Quadratic Nonlinear Optical, and Cubic Nonlinear Optical Properties of Dipolar Alkynylruthenium Complexes with Oligo(phenyleneethynylene) Bridges / Bandar, Babgi; Rigamonti, Luca; Marie P., Cifuentes; T., Christopher Corkery; Michael D., Randles; Torsten, Schwich; Simon, Petrie; Robert, Stranger; Ayele, Teshome; Inge, Asselberghs; Koen, Clays; Marek, Samoc; Mark G., Humphrey. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - ELETTRONICO. - 131:29(2009), pp. 10293-10307. [10.1021/ja902793z]
Data di pubblicazione: | 2009 | |
Titolo: | Length-Dependent Convergence and Saturation Behavior of Electrochemical, Linear Optical, Quadratic Nonlinear Optical, and Cubic Nonlinear Optical Properties of Dipolar Alkynylruthenium Complexes with Oligo(phenyleneethynylene) Bridges | |
Autore/i: | Bandar, Babgi; Rigamonti, Luca; Marie P., Cifuentes; T., Christopher Corkery; Michael D., Randles; Torsten, Schwich; Simon, Petrie; Robert, Stranger; Ayele, Teshome; Inge, Asselberghs; Koen, Clays; Marek, Samoc; Mark G., Humphrey | |
Autore/i UNIMORE: | ||
Digital Object Identifier (DOI): | http://dx.doi.org/10.1021/ja902793z | |
Rivista: | ||
Volume: | 131 | |
Fascicolo: | 29 | |
Pagina iniziale: | 10293 | |
Pagina finale: | 10307 | |
Codice identificativo ISI: | WOS:000268395000078 | |
Codice identificativo Scopus: | 2-s2.0-67651213432 | |
Codice identificativo Pubmed: | 19621969 | |
Citazione: | Length-Dependent Convergence and Saturation Behavior of Electrochemical, Linear Optical, Quadratic Nonlinear Optical, and Cubic Nonlinear Optical Properties of Dipolar Alkynylruthenium Complexes with Oligo(phenyleneethynylene) Bridges / Bandar, Babgi; Rigamonti, Luca; Marie P., Cifuentes; T., Christopher Corkery; Michael D., Randles; Torsten, Schwich; Simon, Petrie; Robert, Stranger; Ayele, Teshome; Inge, Asselberghs; Koen, Clays; Marek, Samoc; Mark G., Humphrey. - In: JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. - ISSN 0002-7863. - ELETTRONICO. - 131:29(2009), pp. 10293-10307. [10.1021/ja902793z] | |
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