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Supramolecular assembly of molecular rare-earth–3,5-dichlorobenzoic acid–2,2′:6′,2″-terpyridine materials: structural systematics, luminescence properties, and magnetic behavior

Carter, Korey P., Thomas, Kara E., Pope, Simon J. A., Holmberg, Rebecca J., Butcher, Ray J., Murugesu, Muralee and Cahill, Christopher L. 2016. Supramolecular assembly of molecular rare-earth–3,5-dichlorobenzoic acid–2,2′:6′,2″-terpyridine materials: structural systematics, luminescence properties, and magnetic behavior. Inorganic Chemistry 55 (14) , pp. 6902-6915. 10.1021/acs.inorgchem.6b00408

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Abstract

The syntheses and crystal structures of 16 new rare-earth (RE = La3+–Y3+)–3,5-dichlorobenzoic acid–terpyridine molecular materials characterized via single-crystal and powder X-ray diffraction are reported. These 16 complexes consist of four unique structure types ranging from molecular dimers (La3+ and Ce3+) to tetramers (Pr3+–Y3+) as one moves across the RE3+ series. This structural evolution is accompanied by subsequent changes in modes of supramolecular assembly (halogen bonding, halogen−π, halogen–halogen, and π–π interactions). Solid-state visible and near-infrared lifetime measurements were performed on complexes 6 (Sm3+), 7 (Eu3+), 9 (Tb3+), 10 (Dy3+), 11 (Ho3+), 12 (Er3+), and 14 (Yb3+), and characteristic emission was observed for all complexes except 11. Lifetime data for 11, 12, and 14 suggest sensitization by the terpy antenna does occur in near-infrared systems, although not as efficiently as in the visible region. Additionally, direct current magnetic susceptibility measurements were taken for complexes 10 (Dy3+) and 12 (Er3+) and showed dominant ferromagnetic behavior.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Chemistry
Subjects: Q Science > QD Chemistry
Additional Information: PDF uploaded in accordance with publisher's policies at http://www.sherpa.ac.uk/romeo/issn/0020-1669/ (30.6.16).
Publisher: American Chemical Society
ISSN: 0020-1669
Date of First Compliant Deposit: 28 June 2016
Date of Acceptance: 27 June 2016
Last Modified: 12 Mar 2020 01:54
URI: http://orca.cf.ac.uk/id/eprint/92169

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