Broadband white-light emission from supramolecular piperazinium-based lead halide perovskites linked by hydrogen bonds
作者:Mi-Hee Jung、Kyoung Chul Ko、Woo Ram Lee
DOI:10.1039/c9dt03469b
日期:——
demonstrate white-light emission using lead halide perovskites: (pip)2PbBr6 (pip = piperazine), (pip)2Pb4Cl12, (1mpz)2PbBr6 (1mpz = 1-methylpiperazine), and (2,5-dmpz)0.5PbBr3·2((CH3)2SO) (2,5-dmpz = trans-2,5-dimethylpiperazine, abbreviated as (2,5-dmpz)0.5PbBr3), in which the inorganic frameworks were connected by piperazinium dications through hydrogen bonds, forming a three-dimensional supramolecular
我们演示了使用卤化钙钛矿形成的白光发射:(pip)2 PbBr 6(pip =哌嗪),(pip)2 Pb 4 Cl 12,(1mpz)2 PbBr 6(1mpz = 1-甲基哌嗪),和(2, 5-dmpz)0.5 PbBr 3 ·2((CH 3)2 SO)(2,5-dmpz =反式-2,5-二甲基哌嗪,缩写为(2,5-dmpz)0.5 PbBr 3),其中无机骨架通过氢键通过哌嗪鎓离子连接,形成三维超分子网络。通过单晶X射线衍射测量和拉曼光谱,我们确定了无机骨架中的晶体结构和局部环境振动模式,发现(pip)2 PbBr 6在中心对称的正交晶体空间群Pnnm中结晶,而(pip)2 Pb 4 Cl 12在三角/菱面体空间群R 3中结晶。零维(1mpz)2 PbBr 6结构在中心对称单斜空间群中结晶。P 2 / n,而[PbBr 6 ] 4-八面体被1-甲基哌嗪指示剂隔开。(2,5-dmpz)0