Solvent-free synthesis of magnesium phosphite-oxalates that show second-harmonic generation responses

Abstract

Two new magnesium phosphite-oxalates were prepared under solvent-free conditions using different amines as structure-directing agents. They feature noncentrosymmetric structures with sql and dia topologies, respectively. The two compounds show moderate...

Two pairs of chiral YbIII enantiomers presenting distinct NIR luminescence and circularly polarized luminescence performances with giant differences in second-harmonic generation responses

“…In order to confirm this fact, DFT calculations on the dipole moments of D-1 and D-2 were performed using the Gaussian 09 package, and the results unveil that the dipole moment ( μ total = 7.14 D) of D-1 is much larger than that of D-2 ( μ total = 2.73 D) (Table S7†). Moreover, as shown in Table 1, the SHG intensities of D-1/L-1 are much larger than those of most reported SHG-active complexes, such as 1D chiral Cu( ii ) enantiomers with L R /L S ligands, 81 [Dy(dma) 5 ][W(CN) 8 ], 110 chiral R / S -FeNb enantiomers, 111 chiral YbZn 2 enantiomers, 112 chiral L/D-ZnBr 3 enantiomers, 113 (CASD) 2 MnBr 4 , 114 [(DPA)(18-crown-6)]ClO 4 , 115 chiral 2D Ag( i ) enantiomers, 80 a chiral Cu( i ) complex, 116 N*[MnCr], 117 C 2 H 10 N 2 ·Mg(H 2 PO 3 ) 2 (C 2 O 4 ), 118 [C(NH 2 ) 3 ] 2 Zn(CO 3 ) 2 , 119 ionic 1D chiral Cu( ii ) enantiomers with L R /L S ligands, 72 [Cd(en)-(1,3-dap)][AlB 5 O 10 ], 120 (morpholinium) 2 Cd 2 Cl 6 , 121 (C 4 H 10 NO)PbBr 3 , 122 [C(NH 2 ) 3 ] 3 AsO 4 ·2H 2 O, 123 and (Hdabco + )(CF 3 COO − ), 124 but slightly smaller than those of some complexes, such as a YbSe complex 125 and [(CH 3 ) 3 NCH 2 CHCH 2 ]FeCl 4 . 126 More remarkably, the SHG intensities of D-1/L-1 are even more than twice those of inorganic SHG-active materials, for example KTOH 127 and CKBFI.…”