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Sandwich double-decker Er(III) and Yb(III) complexes, containing naphthalocyanine moiety: synthesis and investigation of effect of a paramagnetic metal center

Abstract

Novel heteroleptic Er (III) and Yb (III) naphthalocyaninato-phthalocyaninates containing octa-phenyl or octa-phenoxysubstituted naphthalocyanine deck were synthesised and identified by 1H NMR, EPR and high resolution MALDI-TOF/TOF mass spectrometry. Direct synthesis of novel homoleptic Yb (III) bis(octa-phenylnaphthalocyaninate) was carried out. Downfield lanthanide induced shifts of the aromatic protons in target compounds were observed comparing with corresponding diamagnetic Lu (III) complexes. In the Near-IR absorption spectra, an increase in ionic radius going from Lu(III) to Er(III) results in a bathochromic shift of the intervalence band up to 1473 nm. This work presents the first experimental ESR study of Yb(III) bisnaphthalocyaninate, where a set of magnetic parameters and properties (including spin, magnitude and sign of magnetic anisotropy parameter D, increased splitting in a crystal field, ferromagnetic f-π interaction etc.) was determined and interpreted by both ESR and SQUID techniques and supported by theoretical considerations.

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Publication details

The article was accepted on 13 Aug 2019 and first published on 13 Aug 2019


Article type: Paper
DOI: 10.1039/C9DT03226F
Dalton Trans., 2019, Accepted Manuscript

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    Sandwich double-decker Er(III) and Yb(III) complexes, containing naphthalocyanine moiety: synthesis and investigation of effect of a paramagnetic metal center

    T. Dubinina, A. Kosov, E. Petrusevich, N. E. Borisova, A. Trigub, G. V. Mamin, I. Gilmutdinov, A. Masitov, S. Tokarev, V. Pushkarev and L. G. Tomilova, Dalton Trans., 2019, Accepted Manuscript , DOI: 10.1039/C9DT03226F

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