TY - JOUR
T1 - Homochiral Metal-Organic Frameworks Embedding Helicity Based on a Semirigid Alanine Derivative
AU - Guan, Guo Xiu
AU - Liu, Xu
AU - Yue, Qi
AU - Gao, En Qing
N1 - Publisher Copyright:
© 2017 American Chemical Society.
PY - 2018/1/3
Y1 - 2018/1/3
N2 - Five novel homochiral metal-organic frameworks (HMOFs) have been synthesized using a semirigid alanine-derived ligand and varied auxiliary N-donor ligands, namely, [Cu2(TMAla)2(bipy)2]·10H2O (1) and [Cu(TMAla)(bpea)0.5(H2O)]·H2O (2), Ln(TMAla)(HTMAla)(phen) (Ln = Eu, 3; Tb, 4; Gd, 5), where H2TMAla = terephthaloyl-mono(l-alanine), bipy = 4,4′-bipyridine, bpea = 1,2-bis(4-pyridyl)ethane, phen = 1,10-phenanthroline. Crystallographic analysis indicates that all the complexes contain homochiral left- and/or right-handed helical chains, which are constructed by TMAla fragments and metal ions. Meanwhile, the introduction of auxiliary N-donor ligands gives rise to the formation of HMOFs with different structural topologies. Complex 1 shows a three-dimensional (3D) quartz-dual net with a 4-connected (75·9) topology in the presence of bipy. Complex 2 possesses a novel 3D pillared-layer framework with a (3,4,4)-connected (6·104·12)(63)2(64·102) topology by using bpea instead of bipy. Complexes 3-5 are isomorphous and feature a 2-fold interpenetrating 3D quartz net with a 4-connected (64·82) topology due to the participation of phen. Complexes 3 and 4 exhibit characteristic Eu(III) and Tb(III) emissions in the red and green light regions, respectively. The solid-state circular dichroism (CD) spectra of all complexes exhibit strong CD signals. Our results highlight that the semirigid chiral linker is successful for the construction of interesting HMOFs with unique helical chains.
AB - Five novel homochiral metal-organic frameworks (HMOFs) have been synthesized using a semirigid alanine-derived ligand and varied auxiliary N-donor ligands, namely, [Cu2(TMAla)2(bipy)2]·10H2O (1) and [Cu(TMAla)(bpea)0.5(H2O)]·H2O (2), Ln(TMAla)(HTMAla)(phen) (Ln = Eu, 3; Tb, 4; Gd, 5), where H2TMAla = terephthaloyl-mono(l-alanine), bipy = 4,4′-bipyridine, bpea = 1,2-bis(4-pyridyl)ethane, phen = 1,10-phenanthroline. Crystallographic analysis indicates that all the complexes contain homochiral left- and/or right-handed helical chains, which are constructed by TMAla fragments and metal ions. Meanwhile, the introduction of auxiliary N-donor ligands gives rise to the formation of HMOFs with different structural topologies. Complex 1 shows a three-dimensional (3D) quartz-dual net with a 4-connected (75·9) topology in the presence of bipy. Complex 2 possesses a novel 3D pillared-layer framework with a (3,4,4)-connected (6·104·12)(63)2(64·102) topology by using bpea instead of bipy. Complexes 3-5 are isomorphous and feature a 2-fold interpenetrating 3D quartz net with a 4-connected (64·82) topology due to the participation of phen. Complexes 3 and 4 exhibit characteristic Eu(III) and Tb(III) emissions in the red and green light regions, respectively. The solid-state circular dichroism (CD) spectra of all complexes exhibit strong CD signals. Our results highlight that the semirigid chiral linker is successful for the construction of interesting HMOFs with unique helical chains.
UR - https://www.scopus.com/pages/publications/85040166247
U2 - 10.1021/acs.cgd.7b01365
DO - 10.1021/acs.cgd.7b01365
M3 - 文章
AN - SCOPUS:85040166247
SN - 1528-7483
VL - 18
SP - 364
EP - 372
JO - Crystal Growth and Design
JF - Crystal Growth and Design
IS - 1
ER -