Coordinate bond- and hydrogen bond-assisted electron transfer strategy towards the generation of photochromic metal phosphites
作者:Ai-Ju Liu、Yue Han、Fei Xu、Song-De Han、Jie Pan、Guo-Ming Wang
DOI:10.1039/d0dt03010d
日期:——
4-bis(pyrid-4-yl)benzene) and BPBP (4,4′-di(pyridin-4-yl)-1,1′-biphenyl), to a metal phosphite system yields two hybrid zincophosphites [Zn2(HPO3)2(BPB)]·0.5DMF (1, DMF = N,N-dimethylformamide) and [H2BPBP]3·[Zn5Cl8(HPO3)4]·2H2O (2). 1 shows a hybrid layer with the inorganic zincophosphite chains as building blocks. 2 shows isolated pentanuclear Zn clusters in which four phosphite moieties as a bridging ligand, together
将共轭二吡啶衍生物BPB(1,4-双(吡啶-4-基)苯)和BPBP(4,4'-二(吡啶-4-基)-1,1'-联苯)接枝到金属亚磷酸盐系统产生两个杂化亚磷酸锌[Zn 2(HPO 3)2(BPB)]·0.5DMF(1,DMF = N,N-二甲基甲酰胺)和[H 2 BPBP] 3 ·[Zn 5 Cl 8(HPO 3)4 ] ·2H 2 O(2)。图1显示了具有无机亚磷酸锌链作为结构单元的杂化层。2图1显示了分离的五核Zn簇,其中四个亚磷酸酯部分作为桥连配体,连同八个氯离子作为末端配体,与五个Zn离子键合以产生阴离子无机簇。负电荷由质子化的二吡啶衍生物物质补偿,该物质位于簇之间的空隙中,并通过N–H⋯O–P氢键与相邻簇相互作用。有趣的是,图1和图2显示了在环境条件下Xe灯照射下,由配位键和氢键辅助的电子转移(ET)驱动的光致变色现象。虽然1和2在电子给体(ED)和电子受体(EA)方面具有相似的成分