| Ruthenium(ii) bis(terpyridine) electron transfer complexes with alkynyl-ferrocenyl bridges: synthesis, structures, and electrochemical and spectroscopic studies. | |
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MedLine Citation:
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PMID: 22858784 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Two novel alkynyl-bridged symmetric bis-tridentate ligands 1,2-bis(1'-[4'-(2,2':6',2''-terpyridinyl)]ferrocenyl)ethyne (; tpy-Fc-C[triple bond, length as m-dash]C-Fc-tpy; Fc = ferrocenyl; tpy = terpyridyl) and 1,4-bis(1'-[4'-(2,2':6',2''-terpyridinyl)]ferrocenyl)-1,3-butadiyne (; tpy-Fc-C[triple bond, length as m-dash]C-C[triple bond, length as m-dash]C-Fc-tpy) and their Ru(2+) complexes and have been synthesized and characterized by cyclic voltammetry, UV-vis and luminescence spectroscopy, and in the case of by single-crystal X-ray diffraction. Cyclic voltammograms of both compounds, and , display two severely overlapping ferrocene-based oxidative peaks with only one reductive peak. The redox behavior of and is dominated by the Ru(2+)/Ru(3+) redox couple (E(1/2) from 1.33 to 1.34 V), the Fe(2+)/Fe(3+) redox couples (E(1/2) from 0.46 to 0.80 V), and the tpy/tpy(-)/tpy(2-) redox couples (E(1/2) from -1.19 to -1.48 V). The UV-vis spectra of and show absorption bands assigned to the (1)[(d(π)(Fe))(6)] → (1)[(d(π)(Fe))(5)(π*(tpy)(Ru))(1)] MMLCT transition at ∼555 nm. Complexes and are luminescent in H(2)O-CH(3)CN (4 : 1, v/v) solution at room temperature, and exhibits the strongest luminescence intensity (λ(max)(em): 710 nm, Φ(em): 2.28 × 10(-4), τ: 358 ns) relative to analogous ferrocene-based bis(terpyridine) Ru(ii) complexes reported so far. |
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Authors:
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Kai-Qiang Wu; Jian Guo; Jian-Feng Yan; Li-Li Xie; Feng-Bo Xu; Sha Bai; Peter Nockemann; Yao-Feng Yuan |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-8-3 |
Journal Detail:
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Title: Dalton transactions (Cambridge, England : 2003) Volume: - ISSN: 1477-9234 ISO Abbreviation: Dalton Trans Publication Date: 2012 Aug |
Date Detail:
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Created Date: 2012-8-3 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101176026 Medline TA: Dalton Trans Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China. yaofeng_yuan@fzu.edu.cn. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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