Details

Autor(en) / Beteiligte

• Carter, Korey P
• Thomas, Kara E
• Pope, Simon J. A
• Holmberg, Rebecca J
• Butcher, Ray J
• Murugesu, Muralee
• Cahill, Christopher L

Titel

Supramolecular Assembly of Molecular Rare-Earth–3,5-Dichlorobenzoic Acid–2,2′:6′,2″-Terpyridine Materials: Structural Systematics, Luminescence Properties, and Magnetic Behavior

Ist Teil von

• Inorganic chemistry, 2016-07, Vol.55 (14), p.6902-6915

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2016

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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.