Luminescence and Magnetic Properties of Tb(III) Complexes with TETA and Synergistic Effect by 1,10-Phenanthroline

作者: Jung-Soo Kang , Kam Tong Leung , Hyung-Kook Cho , Jun-Gill Kang , Youngku Sohn

DOI: 10.1002/BKCS.10889

关键词:

摘要: Two Tb(III) complexes, [Tb(TETA)]− and [Tb(TETA)(phen)]− (TETA = 1,4,8,11-tetraazacyclotetradecane-1,4,8,11-tetraacetate phen = 1,10-phenanthroline), were synthesized their luminescence ( 5D4 → 7F J =0–6 transitions) magnetic properties examined. The photoluminescence (PL) quantum yield of (Q = 0.47) was significantly higher than that (Q = 0.006). dramatic increase (78×) in green attributed to intramolecular energy transfer from phen Tb(III). rate according Dexter theory found be approximately 1011 s−1. temperature dependence the molar susceptibilities confirmed two complexes behave as paramagnets obeying Curie–Weiss law. In addition, field-dependent magnetization measured −70 + 70 kOe range at T = 1.8 K fitted well with Brillouin function following values: g eff = 1.5, μ B  = 9.27 × 10−21 emu, J = 6. These results provide new insights into development lanthanide metal tetraaza © 2016 Korean Chemical Society, Seoul & Wiley-VCH Verlag GmbH Co. KGaA, Weinheimmacrocyclic ligands.

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