Enhanced <i>E</i>/<i>Z</i>-photoisomerization and luminescence of stilbene derivative co-coordinated in di-β-diketonate lanthanide complexes
作者:Lu Chen、Yu Tan、Han Xu、Kun Wang、Zhou-Hui Chen、Nuan Zheng、Yu-Qian Li、Li-Rong Lin
DOI:10.1039/d0dt03383a
日期:——
A new tetradentate chelating ligand appending a stilbene derivative, E-N′,N′-bis(pyridin-2-ylmethyl)-4-styrylbenzohydrazide (HL) was synthesized, together with two β-diketonates (4,4,4-trifluoro-1-phenylbutane-1,3-dionate, tfd), with or without the trifluoroacetate anion present as a ligand for coordination with lanthanide(III) ions to form [Ln(tfd)2(HL)(CF3CO2)] (LnC49H36F9N4O7, Ln = La (1), Nd (2)
合成了一种新的四齿螯合配体,该配体配以二苯乙烯衍生物EN ',N'-双(吡啶-2-基甲基)-4-苯乙烯基苯并肼(HL),以及两种β-二酮酸酯(4,4,4-三氟-1 -苯基丁烷-1,3-二酸酯,tfd),有或没有三氟乙酸根阴离子作为配体与镧系元素(III)离子配位形成[Ln(tfd)2(HL)(CF 3 CO 2)](LnC 49 H 36 F 9 N 4 O 7,Ln = La(1),Nd(2),Eu(3),Gd(4))和[Yb(tfd)2(L)](YbC 47 H 35 F 6 N 4 O 5(5),L =去质子化的HL)。对所有五个络合物进行结构表征,获得五个晶体并通过单晶X射线衍射分析。complex配合物4中二苯乙烯基的反式-顺式光致异构化的量子产率比HL本身提高了约五倍。其他复合物显示出稍微增强或抑制的光异构化。complex配合物3的总发光量子产率/敏化效率固态和乙腈溶液中的苯二酚分别为22