Self-assembly of cadmium ions and the rigid bridging ligand 4,4′-methylenebis(3-hydroxy-2-naphthoic acid) (pamoic acid, H4PA) leads to a one-dimensional metal-organic framework with open cube-like M2(H2PA)2 cages wit...Self-assembly of cadmium ions and the rigid bridging ligand 4,4′-methylenebis(3-hydroxy-2-naphthoic acid) (pamoic acid, H4PA) leads to a one-dimensional metal-organic framework with open cube-like M2(H2PA)2 cages within its backbone, and exhibiting interesting yellow fluorescence.展开更多
Eight-coordinate chiral lanthanide complexes [Eu(dbm)3LRR](1),[Eu(dbm)3LSS](2) and [Tb(dbm)3LRR](3)(LRR/LSS =(-)-/(+)-4,5-pineno-2,2'-bipyridine,Hdbm = dibenzoylmethane) were synthesized stereoselectively,which we...Eight-coordinate chiral lanthanide complexes [Eu(dbm)3LRR](1),[Eu(dbm)3LSS](2) and [Tb(dbm)3LRR](3)(LRR/LSS =(-)-/(+)-4,5-pineno-2,2'-bipyridine,Hdbm = dibenzoylmethane) were synthesized stereoselectively,which were characterized by UV-vis,CD spectra and X-ray single-crystal diffraction.The mirrorimage structure features of complexes 1 and 2 were obtained by combination of the solid-state CD spectra and the crystal structure analysis.After further comparison with the solid-state CD spectra of six-coordinate and seven-coordinate metal complexes containing β-diketone ligands,the CD spectraabsolute configuration correlation rule for the eight-coordinate β-diketonate lanthanide complexes was proposed through the exciton chirality method for the first time.The △ or Λ absolute configurations of complexes 1―3 with the distorted square antiprism geometry were confirmed by the X-ray single-crystal analysis.展开更多
The crystal structure of [Sm(m-NO2C6H4CO2)3(H2O)2] was determined.Mr=684. 66,triclinic,space group P1.α=11. 408(6),b=12.990(6).c=9.469(3) A,α=104. 84(3),β=92.84,γ=65.31(3)°,V=1229.9(9)A3.Z=2,Dc=1.85g/cm3, F(0...The crystal structure of [Sm(m-NO2C6H4CO2)3(H2O)2] was determined.Mr=684. 66,triclinic,space group P1.α=11. 408(6),b=12.990(6).c=9.469(3) A,α=104. 84(3),β=92.84,γ=65.31(3)°,V=1229.9(9)A3.Z=2,Dc=1.85g/cm3, F(000)=674,μ=25.1 cm-1,R=0.67.The coordination number of samarium ion is eight.The metal ions are bridged by carboxylato groups to form a polymeric chain structure.The crystal data of [Ho (m-NO2C6H4CO2)3 (H2O)2] were measured:triclinic,space group P1,α=11.368(3) .b=12. 943(3),c=9.443(1) A α=104.92(1),β=92.80(3),γ=65.07(2)°,V=1214.7(4)A 3,Z=2,Dc=1.91 g/cm3.These show that the samarium and holmium cornpounds are isomorphous.展开更多
基金supported by the National Natural Science Foundation of China (20772019)NSF of Shanghai (08dj1400100)the Doctoral Program of National Education Ministry of China
文摘Self-assembly of cadmium ions and the rigid bridging ligand 4,4′-methylenebis(3-hydroxy-2-naphthoic acid) (pamoic acid, H4PA) leads to a one-dimensional metal-organic framework with open cube-like M2(H2PA)2 cages within its backbone, and exhibiting interesting yellow fluorescence.
基金Supported by the National Natural Science Foundation of China (Grant Nos. 20773098 & 20973136)the Innovation Foundation of Xiamen University (Series 2) (Grant No. XDKJCX20061027)
文摘Eight-coordinate chiral lanthanide complexes [Eu(dbm)3LRR](1),[Eu(dbm)3LSS](2) and [Tb(dbm)3LRR](3)(LRR/LSS =(-)-/(+)-4,5-pineno-2,2'-bipyridine,Hdbm = dibenzoylmethane) were synthesized stereoselectively,which were characterized by UV-vis,CD spectra and X-ray single-crystal diffraction.The mirrorimage structure features of complexes 1 and 2 were obtained by combination of the solid-state CD spectra and the crystal structure analysis.After further comparison with the solid-state CD spectra of six-coordinate and seven-coordinate metal complexes containing β-diketone ligands,the CD spectraabsolute configuration correlation rule for the eight-coordinate β-diketonate lanthanide complexes was proposed through the exciton chirality method for the first time.The △ or Λ absolute configurations of complexes 1―3 with the distorted square antiprism geometry were confirmed by the X-ray single-crystal analysis.
文摘The crystal structure of [Sm(m-NO2C6H4CO2)3(H2O)2] was determined.Mr=684. 66,triclinic,space group P1.α=11. 408(6),b=12.990(6).c=9.469(3) A,α=104. 84(3),β=92.84,γ=65.31(3)°,V=1229.9(9)A3.Z=2,Dc=1.85g/cm3, F(000)=674,μ=25.1 cm-1,R=0.67.The coordination number of samarium ion is eight.The metal ions are bridged by carboxylato groups to form a polymeric chain structure.The crystal data of [Ho (m-NO2C6H4CO2)3 (H2O)2] were measured:triclinic,space group P1,α=11.368(3) .b=12. 943(3),c=9.443(1) A α=104.92(1),β=92.80(3),γ=65.07(2)°,V=1214.7(4)A 3,Z=2,Dc=1.91 g/cm3.These show that the samarium and holmium cornpounds are isomorphous.
