FBB支持个人高速上网(HIS,High Speed Internet)业务、个人语音(VoIP,Voice over IP)业务、个人互联网电视(IPTV,Internet Protocol Television)业务、企业专线上网业务(DIA,Dedicated Internet Access)、企业VPN等业务。
A new alkaline-earth and rare-earth borate fluoride,Ba_(10)LuB_(18)O_(32)F_(13),the first example of borate in the Lu–B–O–F system,has been successfully synthesized in a high-temperature vacuum system.It crystalliz...A new alkaline-earth and rare-earth borate fluoride,Ba_(10)LuB_(18)O_(32)F_(13),the first example of borate in the Lu–B–O–F system,has been successfully synthesized in a high-temperature vacuum system.It crystallizes in the orthorhombic system,with the Fmm2 space group and the parameters a=16.5749(6)Å,b=16.7644(9)Å,c=13.6222(6)Å,and Z=4.It represents a new fundamental building block(FBB).展开更多
A new birefringent crystal SbB5O9 has been synthesized by combining π-conjugated[B_(3)O_(6)]groups and Sb^(3+)cations with SCALP.It exhibits the unwonted[B_(5)O_(11)]fundamental building block(FBB)and dimeric[Sb_(2)O...A new birefringent crystal SbB5O9 has been synthesized by combining π-conjugated[B_(3)O_(6)]groups and Sb^(3+)cations with SCALP.It exhibits the unwonted[B_(5)O_(11)]fundamental building block(FBB)and dimeric[Sb_(2)O_(6)]cluster.Remarkably,SbB_(5)O_(9) exhibits a short UV cutoff edge(below 240 nm)and a large birefringence(Δn=0.151@1064 nm)which is even better than that of the well-known commercial birefringent material α-BaB_(2)O_(4)(α-BBO)(Δn=0.122@532 nm).First-principles calculations show that the birefringence enhancement mainly originates from the highly distorted[Sb_(2)O_(6)]dimer and π-conjugated B-O anionic groups.展开更多
Cyanurate motifs are emerging functional basic blocks(FBBs)for nonlinear optical(NLO)materials and birefringent materials.Herein,we report two new potassium lead(II)hydroisocyanurates,namely,K_(2)Pb(H_(2)C_(3)N_(3)O_(...Cyanurate motifs are emerging functional basic blocks(FBBs)for nonlinear optical(NLO)materials and birefringent materials.Herein,we report two new potassium lead(II)hydroisocyanurates,namely,K_(2)Pb(H_(2)C_(3)N_(3)O_(3))_(4)(H_(2)O)_(4)(I)and K_(3)Pb(H_(2)C_(3)N_(3)O_(3))_(5)(H_(2)O)_(6)(II).I and II belong to acentric Cm and centric C2/m,respectively.Compound I features a novel 3D network formed by 2D[K_(2)PbO_(8)(H_(2)O)_(4)]1^(2−)anionic layers interconnected by(H_(2)C_(3)N_(3)O_(3))^(−)anions.The 2D[K_(2)PbO_(8)(H_(2)O)_(4)]^(12−)anionic layer is composed of 1D chains of edge-sharing K(1)O_(6)and K(2)O_(8)being further interconnected by 8-coordinated Pb^(2+)ions.Compound II exhibits a characteristic 3D framework based on 2D[K_(3)PbO_(11)(H_(2)O)_(6)]^(17−)anionic layers interlinked through(H_(2)C_(3)N_(3)O_(3))^(−)groups,and the 2D[K_(3)PbO_(11)(H_(2)O)_(6)]^(17−)anionic layer is based on K-O/H_(2)O chains bridged by Pb^(2+)ions.Powder second harmonic generation(SHG)measurements of I revealed a moderate SHG response of approximately 2.6×KDP with a type I phase-matching behavior under 1064 nm laser radiation.Theoretical calculations of I and II revealed their birefringence to be 0.325 and 0.193@532 nm,respectively.Their impressive optical properties mainly stem from stereochemically active lone pair(SCALP)Pb^(2+)cations and the planarπ-conjugated(H_(2)C_(3)N_(3)O_(3))^(−)groups.展开更多
文摘FBB支持个人高速上网(HIS,High Speed Internet)业务、个人语音(VoIP,Voice over IP)业务、个人互联网电视(IPTV,Internet Protocol Television)业务、企业专线上网业务(DIA,Dedicated Internet Access)、企业VPN等业务。
基金supported by the National Natural Science Foundation of China(51872325,61835014,51972336)the Shanghai Cooperation Organization Science and Technology Partnership Program(2020E01039)+5 种基金Xinjiang Tianshan Youth Program-Outstanding Young Science and Technology Talents(2020Q004)CAS Youth Interdisciplinary Team(JCTD-2021-18)the West Light Foundation of CAS(2021-XBQNXZ-004)the Scientific Instrument Developing Project,CAS(YJKYYQ20210033)Key Research Program of Frontier Sciences,CAS(ZDBS-LY-SLH035)the International Partnership Program of CAS(1A1365kysb20200008).
文摘A new alkaline-earth and rare-earth borate fluoride,Ba_(10)LuB_(18)O_(32)F_(13),the first example of borate in the Lu–B–O–F system,has been successfully synthesized in a high-temperature vacuum system.It crystallizes in the orthorhombic system,with the Fmm2 space group and the parameters a=16.5749(6)Å,b=16.7644(9)Å,c=13.6222(6)Å,and Z=4.It represents a new fundamental building block(FBB).
基金the National Natural Science Foundation of China(U2003306)the Science and Technology Service Network Initiative of CAS(KFJ-STS-QYZD-130)the Fujian Institute of Innovation,CAS.
文摘A new birefringent crystal SbB5O9 has been synthesized by combining π-conjugated[B_(3)O_(6)]groups and Sb^(3+)cations with SCALP.It exhibits the unwonted[B_(5)O_(11)]fundamental building block(FBB)and dimeric[Sb_(2)O_(6)]cluster.Remarkably,SbB_(5)O_(9) exhibits a short UV cutoff edge(below 240 nm)and a large birefringence(Δn=0.151@1064 nm)which is even better than that of the well-known commercial birefringent material α-BaB_(2)O_(4)(α-BBO)(Δn=0.122@532 nm).First-principles calculations show that the birefringence enhancement mainly originates from the highly distorted[Sb_(2)O_(6)]dimer and π-conjugated B-O anionic groups.
基金supported by the National Natural Science Foundation of China(21701173,21875248,91622112,and 22031009)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB20000000)the 100 Talents Project of Fujian Province.
文摘Cyanurate motifs are emerging functional basic blocks(FBBs)for nonlinear optical(NLO)materials and birefringent materials.Herein,we report two new potassium lead(II)hydroisocyanurates,namely,K_(2)Pb(H_(2)C_(3)N_(3)O_(3))_(4)(H_(2)O)_(4)(I)and K_(3)Pb(H_(2)C_(3)N_(3)O_(3))_(5)(H_(2)O)_(6)(II).I and II belong to acentric Cm and centric C2/m,respectively.Compound I features a novel 3D network formed by 2D[K_(2)PbO_(8)(H_(2)O)_(4)]1^(2−)anionic layers interconnected by(H_(2)C_(3)N_(3)O_(3))^(−)anions.The 2D[K_(2)PbO_(8)(H_(2)O)_(4)]^(12−)anionic layer is composed of 1D chains of edge-sharing K(1)O_(6)and K(2)O_(8)being further interconnected by 8-coordinated Pb^(2+)ions.Compound II exhibits a characteristic 3D framework based on 2D[K_(3)PbO_(11)(H_(2)O)_(6)]^(17−)anionic layers interlinked through(H_(2)C_(3)N_(3)O_(3))^(−)groups,and the 2D[K_(3)PbO_(11)(H_(2)O)_(6)]^(17−)anionic layer is based on K-O/H_(2)O chains bridged by Pb^(2+)ions.Powder second harmonic generation(SHG)measurements of I revealed a moderate SHG response of approximately 2.6×KDP with a type I phase-matching behavior under 1064 nm laser radiation.Theoretical calculations of I and II revealed their birefringence to be 0.325 and 0.193@532 nm,respectively.Their impressive optical properties mainly stem from stereochemically active lone pair(SCALP)Pb^(2+)cations and the planarπ-conjugated(H_(2)C_(3)N_(3)O_(3))^(−)groups.
