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摘要
Two guanidinate‐based terbium complexes [ i PrNC(N i Pr2)N i Pr] m TbCl3– m [ m = 3 ( 1 ), 2 ( 2 )] were synthesized, and the crystal structure of 1 was determined by single‐crystal X‐ray diffraction. Complexes 1 and 2 were further characterized by elemental analysis, IR, and 1H NMR spectroscopy. In complex 1 the guanidinate ligand coordinates to the terbium atom through the nitrogen atoms in a bidentate chelating coordination mode. As a result of an efficient energy transfer from the guanidinate ligand to the central Tb3+, both 1 and 2 have been found to exhibit strong green emission corresponding to Tb3+ 5D4‐7F J ( J = 6, 5, 4, 3) transitions. Among them, the emission 5D4‐7F5 (550 nm) is the most prominent. The lifetimes of the 5D4 Tb3+ excited levels of the two complexes were determined to be around 0.90 ms. (? Wiley‐VCH ...
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单位金属有机化学国家重点实验室
