Synthesis, structure, and luminescent properties of oligothiophene-containing metal–organic frameworks
作者:Lyndsey D. Earl、Brian O. Patrick、Michael O. Wolf
DOI:10.1039/c2ce25529d
日期:——
Metalâorganic frameworks (MOFs) based on Zn and functionalized bithiophene dicarboxylic acids are reported, [Zn2(L1)2(DMA)2·3 DMF]n (1), [Zn(L2)(DMA)2]n (2), [Zn(L3)(bpe)0.5]n (3), [Zn(L1)(bpe)·2 DMF]n (4), and [Zn3(L2)3(bpe)2·4 DMF · H2O]n(5) (H2L1 = 3,3â²-diphenyl-2,2â²-bithiophene-5,5â²-dicarboxylic acid, H2L2 = 3,3â²-dihexyl-2,2â²-bithiophene-5,5â²-dicarboxylic acid, H2L3 = 2,2â²-bithiophene-5,5â²-dicarboxylic acid, DMA = dimethylamine, DMF = N,N-dimethylformamide, bpe = trans-1,2-bis(4-pyridyl)ethylene). MOFs 1, 2, and 4 consist of 2-D 4-connected sheets while 3 and 5 are 3-D interpenetrated networks with pcu and (4,6)-connected seh topology, respectively. The emission spectra and lifetimes of 1â5 have been determined: 4 and 5 exhibit reduced emission relative to 1 and 2, respectively, attributed to energy transfer quenching by the bpe, whereas 3 does not exhibit a reduction in emission intensity. Solid state lifetime measurements of 1â5 show that the emission decays are similar to those of the constituent ligands.
基于Zn和功能化联噻吩二羧酸的有机金属骨架(MOFs)被报道,包括[Zn2(L1)2(DMA)2·3 DMF]n (1)、[Zn(L2)(DMA)2]n (2)、[Zn(L3)(bpe)0.5]n (3)、[Zn(L1)(bpe)·2 DMF]n (4) 和 [Zn3(L2)3(bpe)2·4 DMF · H2O]n(5)(H2L1 = 3,3'-二苯基-2,2'-联噻吩-5,5'-二羧酸,H2L2 = 3,3'-二己基-2,2'-联噻吩-5,5'-二羧酸,H2L3 = 2,2'-联噻吩-5,5'-二羧酸,DMA = 二甲胺,DMF = N,N-二甲基甲酰胺,bpe = 反式-1,2-双(4-吡啶基)乙烯)。MOFs 1、2 和 4 由二维四连接片层组成,而 3 和 5 分别是具有pcu和(4,6)-连接seh拓扑的三维互穿网络。测定了1至5的发光光谱和寿命:4和5相对于1和2的发光有所减弱,归因于bpe通过能量转移引起的猝灭,而3的发光强度没有降低。1至5的固体寿命测量显示,它们的发光衰减速率与组成配体的衰减速率相似。