Three pentaborates were made by precise structural regulations under hydrothermal conditions,namely,K_(2)Cs-[B_(5)O_(8)(OH)]·0.5CO_(3)(1),KNa_(4)Cs[B_(5)O_(8)(OH)]_(2)·2OH(2),and NaBa[B_(5)O_(8.5)(OH)](3).Co...Three pentaborates were made by precise structural regulations under hydrothermal conditions,namely,K_(2)Cs-[B_(5)O_(8)(OH)]·0.5CO_(3)(1),KNa_(4)Cs[B_(5)O_(8)(OH)]_(2)·2OH(2),and NaBa[B_(5)O_(8.5)(OH)](3).Compound 1 features the typical 2D layers constructed from the four-connected B_(5)O_(10)(OH)clusters.By adjustment of the reactants and pH values of the systems to remove interlayered CO_(3)^(2−)groups,the centric layers in 1 were transformed to the chiral layers of 2.By further adjusting cationic templates based on host−guest charge matching,the B_(5)O_(10)(OH)cluster unit was transformed to B_(5)O_(11)(OH),which built the chiral porous layers of 3.The chiral compounds 2 and 3 exhibit moderate second harmonic generation(SHG)responses of 1.1 and 1.7 times that of KDP(KH_(2)PO_(4)).The structural regulations actualize the evolutions on both structural symmetries and dimensions.展开更多
Two new belt-like borates Na_(4)[B_(9)O_(14)(OH)_(3)]·0.5H_(2)O(1)and Na_(5)[B_(9)O_(14)(OH)_(4)](2)have been synthesized under solvothermal conditions.Both compounds contain unprecedented B_(9)O_(16)(OH)_(n)^((n...Two new belt-like borates Na_(4)[B_(9)O_(14)(OH)_(3)]·0.5H_(2)O(1)and Na_(5)[B_(9)O_(14)(OH)_(4)](2)have been synthesized under solvothermal conditions.Both compounds contain unprecedented B_(9)O_(16)(OH)_(n)^((n+5))−[n=3(1),4(2)]clusters,which are constructed from four B_(3)O_(3) rings via three BO_(4) tetrahedra.Compound 1 exhibits a rare 1D belt with two types of 8-membered ring(MR)windows based on B_(9)O_(16)(OH)_(3)^(8−) clusters.Compound 2 features two different 1D belts built by different B_(9)O_(16)(OH)_(4)^(9−) units,which is first discovered in borate family.UV-Vis diffuse reflectance spectra reveal that compounds 1 and 2 have the cut-off edges below 190 nm,indicating that they may have potential application in deep UV(DUV)region.展开更多
基金supported by the National Natural Science Foundation of China(21831001,21571016,and 91122028)the National Natural Science Foundation of China for Distinguished Young Scholars(20725101).
文摘Three pentaborates were made by precise structural regulations under hydrothermal conditions,namely,K_(2)Cs-[B_(5)O_(8)(OH)]·0.5CO_(3)(1),KNa_(4)Cs[B_(5)O_(8)(OH)]_(2)·2OH(2),and NaBa[B_(5)O_(8.5)(OH)](3).Compound 1 features the typical 2D layers constructed from the four-connected B_(5)O_(10)(OH)clusters.By adjustment of the reactants and pH values of the systems to remove interlayered CO_(3)^(2−)groups,the centric layers in 1 were transformed to the chiral layers of 2.By further adjusting cationic templates based on host−guest charge matching,the B_(5)O_(10)(OH)cluster unit was transformed to B_(5)O_(11)(OH),which built the chiral porous layers of 3.The chiral compounds 2 and 3 exhibit moderate second harmonic generation(SHG)responses of 1.1 and 1.7 times that of KDP(KH_(2)PO_(4)).The structural regulations actualize the evolutions on both structural symmetries and dimensions.
基金This work was supported by the National Natural Science Foundation of China(Nos.21831001,21571016,91122028)the National Natural Science Foundation of China for Distinguished Young Scholars(No.20725101).
文摘Two new belt-like borates Na_(4)[B_(9)O_(14)(OH)_(3)]·0.5H_(2)O(1)and Na_(5)[B_(9)O_(14)(OH)_(4)](2)have been synthesized under solvothermal conditions.Both compounds contain unprecedented B_(9)O_(16)(OH)_(n)^((n+5))−[n=3(1),4(2)]clusters,which are constructed from four B_(3)O_(3) rings via three BO_(4) tetrahedra.Compound 1 exhibits a rare 1D belt with two types of 8-membered ring(MR)windows based on B_(9)O_(16)(OH)_(3)^(8−) clusters.Compound 2 features two different 1D belts built by different B_(9)O_(16)(OH)_(4)^(9−) units,which is first discovered in borate family.UV-Vis diffuse reflectance spectra reveal that compounds 1 and 2 have the cut-off edges below 190 nm,indicating that they may have potential application in deep UV(DUV)region.
