Details

Autor(en) / Beteiligte

• Huang, Yihui
• Zhu, Qilong
• Sheng, Tianlu
• Hu, Shengmin
• Fu, Ruibiao
• Shen, Chaojun
• Tan, Chunhong
• Wen, Yuehong
• Bai, Songyan
• Wu, Xintao

Titel

Lanthanide coordination polymers assembled from triazine-based flexible polycarboxylate ligands and their luminescent properties

Ist Teil von

• CrystEngComm, 2013-01, Vol.15 (18), p.3560-3567

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Two flexible triazine-based polycarboxylate ligands, 1,3,5-triazine-2-iminodiacetic acid-4,6-bis(l-alanine) (H sub(4)L1) and 1,3,5-triazine-2-iminodiacetic acid-4,6-biglycine (H sub(4)L2), have been designed and used to construct a series of luminescent lanthanide coordination polymers {[Ln(HL1)](H sub(2)O) sub(5)} sub(n)Ln = 1, Tb; 2, Eu; 3, Gd) and {[Ln(HL2)(H sub(2)O)](H sub(2)O) sub(2)} sub(n)Ln = 4, Tb; 5, Eu; 6, Gd). The complexes were structurally authenticated by single-crystal X-ray diffraction, revealing that isostructural complexes 1-3, derived from H sub(4)L1, possess a 2-D framework with the monoclinic space group C2/c, whereas isostructural complexes 4-6, based on H sub(4)L2, exhibit a 2-D layer structure with the monoclinic space group P2(1)/c. Solid-state photoluminescence properties of the complexes were investigated. Complexes 1 and 2 exhibit remarkable green and red luminescence emissions with high quantum yields up to 67% and 68%, respectively, and millisecond-level lifetimes. Nevertheless, complexes 4 and 5 feature weak quantum yields (9.9% for 4; and 30% for 5).