Polymeric cerium nitrate complex with 1,4 bis(phenylsulfinyl)butane (bphsb) [Ce(bphsb) 2(NO 3) 3] n (1) was synthesized and characterized. The crystal structure of the complex indicated that the ligand bphsb ...Polymeric cerium nitrate complex with 1,4 bis(phenylsulfinyl)butane (bphsb) [Ce(bphsb) 2(NO 3) 3] n (1) was synthesized and characterized. The crystal structure of the complex indicated that the ligand bphsb and cerium(Ⅲ) ion form a polymeric double bridge chain complex involving 18 membered macrometallocycles. Each cerium ion is coordinated by ten O atoms in a distorted 4,4 bicapped square antiprism. In the complex the disulfoxide ligand acts as bis monodentate O ligand bridging metal centers.展开更多
A new three-dimensional coordination polymer [Ce_2(C_4H_4O_4)_3(H_2O)_2]_n·3.2 nH_2 O, constructed by Ce(Ⅲ) ion and succinate ion and lattice water molecules has been synthesized under hydrothermal conditions. I...A new three-dimensional coordination polymer [Ce_2(C_4H_4O_4)_3(H_2O)_2]_n·3.2 nH_2 O, constructed by Ce(Ⅲ) ion and succinate ion and lattice water molecules has been synthesized under hydrothermal conditions. It crystallizes in triclinic system, space group P1 with a = 7.8865(6), b = 12.0260(8), c = 12.2598(9) ?, α = 112.456(2)o, β = 90.046(2)o, γ = 100.423(2)o, Mr = 722.14, V = 1053.73(13) ?~3, Z = 2, Dc = 2.276 g/cm^3, μ = 4.35/mm, F(000) = 696, GOF = 1.029, R = 0.0203 and w R = 0.0570. The asymmetric unit contains two Ce^(3+) cations and both of them are nine-coordinated and their coordination geometries can be described as two distorted monocapped square antiprisms. In the title compound, a three-dimensional coordination network with one-dimensional hexagon honeycomb-like channels along the a axis is generated. TG measurement has been carried out, and its result analysis along with the powder XRD determination indicates the residue to be CeO_2.展开更多
Two new polymeric erbium(Ⅲ) complexes of two flexible double betaine ligands have been synthesized and characterized by X-ray analysis. In {[Er(L1)(H2O)4)Cl3 H2O}n (1) (L1 = 4, 4’ -trimethylenedipyridinio-N, N’-dia...Two new polymeric erbium(Ⅲ) complexes of two flexible double betaine ligands have been synthesized and characterized by X-ray analysis. In {[Er(L1)(H2O)4)Cl3 H2O}n (1) (L1 = 4, 4’ -trimethylenedipyridinio-N, N’-diacetate ), the erbium(Ⅲ) ions form a two-dimensional metal carboxylate layer in which each pair of Er(Ⅲ) atoms is bridged by two syn-anti μ-carboxylato-o,o’ groups, Adjacent layers arecross-linked through hydrogen bonds among aqua ligands, lattice water molecules andchloride ions to form a three-dimensional network. Complex l, C17 H28 N2 O9 ErC13 (Mr =676.0) is monoclinic, space group C2, with a= 27. 408(4), b= 9. 645 (3), c= 9. 423(2) A, p=1loo. 85(1)’, V=2446. 2(9) A’, Z=4, D=l. 836 g/cm’, F(OOO) =1332, μ(MoKa) = 38.06 cm-1, R=0. 048 for 2451 reflections with I>2σ(I). { [Er(L2 ) (H2O)4]Cl3. 5H2O}. (2) (L2=1, 3-bis (pyridinio-4-carboxylato) propane) comprises lanthanide carboxylate chains built from centrosymmetric dimeric units crosslinked by a pair of L2 ligands, discrete anions and lattice water molecules. In the dimeric unit of complex 2, each pair of metal ions is bridged by four syn-syn μ-carboxylatoO, O’ groups that are oriented nearly perpendicular to each other about the metal-metalaxis. The metal carboxylate chains of complex 2 are further cross-linked by hydrogenbonds to form a three-dimensional network. Complex 2, C15 H32 N2O13 ErCl3 (Mr=722.0) belongs to the monoclinic space group C2/m with a=16. 564 (3), b=15. 839(3), c=11. 792(4) , β=122. 27(1)°, V=2616(1), Z=4, Dc=1.833 g/cm3,F(000) =1436, μ (MoKa) = 35. 75 cm-1, R =0.043 for 2436 observed reflectionswithI>2σ(I).展开更多
Polymer light-emitting diodes(PLEDs) containing Eu(DBM)3(Br DPPz)(DBM is dibenzoylmethane, and Br DPPz is 11- bromo-dipyrido[3,2-a:2′,3′-c]phenazine) doped in a blend of poly(9,9-dioctylfluorene)(PFO) and 2-tert-but...Polymer light-emitting diodes(PLEDs) containing Eu(DBM)3(Br DPPz)(DBM is dibenzoylmethane, and Br DPPz is 11- bromo-dipyrido[3,2-a:2′,3′-c]phenazine) doped in a blend of poly(9,9-dioctylfluorene)(PFO) and 2-tert-butylphenyl-5- biphenyl-1,3,4-oxadiazole(PBD) as the host matrix were reported. Eu(DBM)3(Br DPPz) exhibited high thermal stability and intense UV-Vis absorption. Narrow-bandwidth red emission at 612 nm with a full width at half-maximum(FWHM) of 14.0 nm was observed from Eu(DBM)3(Br DPPz) in these double-layered PLEDs at dopant concentrations from 1 wt% to 8 wt%. For the PLED containing 1 wt% Eu(DBM)3(Br DPPz), a maximum luminance of 829 cd/m2 at 153.5 m A/cm2, highest external quantum efficiency of 1.70% at 2.1 m A/cm2 and maximum luminance of 0.74 cd/A at 4.31 m A/cm2 were obtained.展开更多
Eu<sup>2+</sup> and Ce<sup>3+</sup> are important rare earth ions with variable valences. There existtwo kind of transition emission, d-f and f-f for Eu<sup>2+</sup>. Eu<sup>2...Eu<sup>2+</sup> and Ce<sup>3+</sup> are important rare earth ions with variable valences. There existtwo kind of transition emission, d-f and f-f for Eu<sup>2+</sup>. Eu<sup>2+</sup> is a good candidatefor the activators of UV-visible tunable laser and luminescent materials due to itstransition characteristics. Ce<sup>3+</sup> displays only d-f transition, which is different fromother rare earth ions. Because of the transition properties of Eu<sup>2+</sup> and Ce<sup>3+</sup>, theyare used both as good activators and as efficient sensitizers. Spectral展开更多
设计合成了一系列以吡啶二亚胺、吡啶胺-亚胺和吡啶二胺为螯合配体的三价钒配合物2a^2e,并通过红外和元素分析等技术手段对其进行了结构表征。在助催化剂和再生活化剂的存在下,这些催化剂展示出了高活性和良好的高温稳定性。得到高相对...设计合成了一系列以吡啶二亚胺、吡啶胺-亚胺和吡啶二胺为螯合配体的三价钒配合物2a^2e,并通过红外和元素分析等技术手段对其进行了结构表征。在助催化剂和再生活化剂的存在下,这些催化剂展示出了高活性和良好的高温稳定性。得到高相对分子质量、单峰分布聚乙烯表明聚合体系为单活性中心。以吡啶二胺为螯合配体的配合物2e(2,6-bis[2,6-(iPr)2PhN C(Me)]2(C5H3N)VCl)在50℃下显示出的活性高达6.96 kg PE/mmolV·h,且在70℃时仍保持高的催化活性,这表明双阴离子吡啶二胺能更好的保护催化活性中心。此外,这类三价钒催化剂能高活性催化乙烯-降冰片烯及乙烯-己烯共聚,在温和条件下即可得到较高单体插入率(降冰片烯37.3%,己烯4.8%)的共聚物。展开更多
Trace Ir(Ⅲ)complex enhanced aggregation-induced electrochemiluminescence(AIECL)of poly-tetraphenylethene(p TPE)in aqueous media was investigated for the first time.The poly-TPE end-capped by Ir(Ⅲ)complex(Ir@p TPE)an...Trace Ir(Ⅲ)complex enhanced aggregation-induced electrochemiluminescence(AIECL)of poly-tetraphenylethene(p TPE)in aqueous media was investigated for the first time.The poly-TPE end-capped by Ir(Ⅲ)complex(Ir@p TPE)and its corresponding model polymer poly-TPE(Ph@pTPE)could be synthesized by Suzuki coupling polymerization reaction of 1,2-bis(4-bromophenyl)-1,2-diphenylethene(M-1)with 1,2-diphenyl-1,2-bis(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethene(M-2)and the continuous Suzuki coupling end-capped reaction of poly-TPE-pinacol boronate with(pq)2 Ir(pico)Br and bromobenzene,respectively.Subsequently,the corresponding Ir@p TPE Pdots and Ph@p TPE Pdots encapsulated with poly(styrene-co-maleicanhydride)(PSMA)could be obtained by nanoprecipitation method.Compared with Ph@p TPE Pdots,the Ir@p TPE Pdots with a trace amount of Ir(Ⅲ)complex(1.34‰of Ir(Ⅲ)content,wt)could exhibit 9.9-fold enhancement of the electrochemiluminescence(ECL)signal for visual emission.This work provided a novel strategy on designing highly efficient ECL materials based on trace Ir(Ⅲ)-end capping AIE-active polymer dots.展开更多
文摘Polymeric cerium nitrate complex with 1,4 bis(phenylsulfinyl)butane (bphsb) [Ce(bphsb) 2(NO 3) 3] n (1) was synthesized and characterized. The crystal structure of the complex indicated that the ligand bphsb and cerium(Ⅲ) ion form a polymeric double bridge chain complex involving 18 membered macrometallocycles. Each cerium ion is coordinated by ten O atoms in a distorted 4,4 bicapped square antiprism. In the complex the disulfoxide ligand acts as bis monodentate O ligand bridging metal centers.
基金financially supported by the National Natural Science Foundation of China(51872109)the Natural Science Foundation of Jiangsu Provincial Department of Education(Nos.15KJA150003,17KJA150002,14KJA150003)
文摘A new three-dimensional coordination polymer [Ce_2(C_4H_4O_4)_3(H_2O)_2]_n·3.2 nH_2 O, constructed by Ce(Ⅲ) ion and succinate ion and lattice water molecules has been synthesized under hydrothermal conditions. It crystallizes in triclinic system, space group P1 with a = 7.8865(6), b = 12.0260(8), c = 12.2598(9) ?, α = 112.456(2)o, β = 90.046(2)o, γ = 100.423(2)o, Mr = 722.14, V = 1053.73(13) ?~3, Z = 2, Dc = 2.276 g/cm^3, μ = 4.35/mm, F(000) = 696, GOF = 1.029, R = 0.0203 and w R = 0.0570. The asymmetric unit contains two Ce^(3+) cations and both of them are nine-coordinated and their coordination geometries can be described as two distorted monocapped square antiprisms. In the title compound, a three-dimensional coordination network with one-dimensional hexagon honeycomb-like channels along the a axis is generated. TG measurement has been carried out, and its result analysis along with the powder XRD determination indicates the residue to be CeO_2.
文摘Two new polymeric erbium(Ⅲ) complexes of two flexible double betaine ligands have been synthesized and characterized by X-ray analysis. In {[Er(L1)(H2O)4)Cl3 H2O}n (1) (L1 = 4, 4’ -trimethylenedipyridinio-N, N’-diacetate ), the erbium(Ⅲ) ions form a two-dimensional metal carboxylate layer in which each pair of Er(Ⅲ) atoms is bridged by two syn-anti μ-carboxylato-o,o’ groups, Adjacent layers arecross-linked through hydrogen bonds among aqua ligands, lattice water molecules andchloride ions to form a three-dimensional network. Complex l, C17 H28 N2 O9 ErC13 (Mr =676.0) is monoclinic, space group C2, with a= 27. 408(4), b= 9. 645 (3), c= 9. 423(2) A, p=1loo. 85(1)’, V=2446. 2(9) A’, Z=4, D=l. 836 g/cm’, F(OOO) =1332, μ(MoKa) = 38.06 cm-1, R=0. 048 for 2451 reflections with I>2σ(I). { [Er(L2 ) (H2O)4]Cl3. 5H2O}. (2) (L2=1, 3-bis (pyridinio-4-carboxylato) propane) comprises lanthanide carboxylate chains built from centrosymmetric dimeric units crosslinked by a pair of L2 ligands, discrete anions and lattice water molecules. In the dimeric unit of complex 2, each pair of metal ions is bridged by four syn-syn μ-carboxylatoO, O’ groups that are oriented nearly perpendicular to each other about the metal-metalaxis. The metal carboxylate chains of complex 2 are further cross-linked by hydrogenbonds to form a three-dimensional network. Complex 2, C15 H32 N2O13 ErCl3 (Mr=722.0) belongs to the monoclinic space group C2/m with a=16. 564 (3), b=15. 839(3), c=11. 792(4) , β=122. 27(1)°, V=2616(1), Z=4, Dc=1.833 g/cm3,F(000) =1436, μ (MoKa) = 35. 75 cm-1, R =0.043 for 2436 observed reflectionswithI>2σ(I).
基金supported by the Major Program for cultivation of the National Natural Science Foundation of China(91233112)the National Natural Science Foundation of China(51273168,21172187,21202139)+2 种基金the Ministry of Science and Technology of China(2010DFA52310)the Innovation Group and Xiangtan Joint Project of Hunan Natural Science Foundation(12JJ7002,12JJ8001)the key project of Hunan Provincial Education Department(13A102,12B123)
文摘Polymer light-emitting diodes(PLEDs) containing Eu(DBM)3(Br DPPz)(DBM is dibenzoylmethane, and Br DPPz is 11- bromo-dipyrido[3,2-a:2′,3′-c]phenazine) doped in a blend of poly(9,9-dioctylfluorene)(PFO) and 2-tert-butylphenyl-5- biphenyl-1,3,4-oxadiazole(PBD) as the host matrix were reported. Eu(DBM)3(Br DPPz) exhibited high thermal stability and intense UV-Vis absorption. Narrow-bandwidth red emission at 612 nm with a full width at half-maximum(FWHM) of 14.0 nm was observed from Eu(DBM)3(Br DPPz) in these double-layered PLEDs at dopant concentrations from 1 wt% to 8 wt%. For the PLED containing 1 wt% Eu(DBM)3(Br DPPz), a maximum luminance of 829 cd/m2 at 153.5 m A/cm2, highest external quantum efficiency of 1.70% at 2.1 m A/cm2 and maximum luminance of 0.74 cd/A at 4.31 m A/cm2 were obtained.
文摘Eu<sup>2+</sup> and Ce<sup>3+</sup> are important rare earth ions with variable valences. There existtwo kind of transition emission, d-f and f-f for Eu<sup>2+</sup>. Eu<sup>2+</sup> is a good candidatefor the activators of UV-visible tunable laser and luminescent materials due to itstransition characteristics. Ce<sup>3+</sup> displays only d-f transition, which is different fromother rare earth ions. Because of the transition properties of Eu<sup>2+</sup> and Ce<sup>3+</sup>, theyare used both as good activators and as efficient sensitizers. Spectral
基金Supported by the National Natural Science Foundation of China(No.21234006)~~
文摘设计合成了一系列以吡啶二亚胺、吡啶胺-亚胺和吡啶二胺为螯合配体的三价钒配合物2a^2e,并通过红外和元素分析等技术手段对其进行了结构表征。在助催化剂和再生活化剂的存在下,这些催化剂展示出了高活性和良好的高温稳定性。得到高相对分子质量、单峰分布聚乙烯表明聚合体系为单活性中心。以吡啶二胺为螯合配体的配合物2e(2,6-bis[2,6-(iPr)2PhN C(Me)]2(C5H3N)VCl)在50℃下显示出的活性高达6.96 kg PE/mmolV·h,且在70℃时仍保持高的催化活性,这表明双阴离子吡啶二胺能更好的保护催化活性中心。此外,这类三价钒催化剂能高活性催化乙烯-降冰片烯及乙烯-己烯共聚,在温和条件下即可得到较高单体插入率(降冰片烯37.3%,己烯4.8%)的共聚物。
基金supported by the National Natural Science Foundation of China(21674046,51673093,21535003)the National Key Reaearch and Development Program of China(2016YFA0201200)。
文摘Trace Ir(Ⅲ)complex enhanced aggregation-induced electrochemiluminescence(AIECL)of poly-tetraphenylethene(p TPE)in aqueous media was investigated for the first time.The poly-TPE end-capped by Ir(Ⅲ)complex(Ir@p TPE)and its corresponding model polymer poly-TPE(Ph@pTPE)could be synthesized by Suzuki coupling polymerization reaction of 1,2-bis(4-bromophenyl)-1,2-diphenylethene(M-1)with 1,2-diphenyl-1,2-bis(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethene(M-2)and the continuous Suzuki coupling end-capped reaction of poly-TPE-pinacol boronate with(pq)2 Ir(pico)Br and bromobenzene,respectively.Subsequently,the corresponding Ir@p TPE Pdots and Ph@p TPE Pdots encapsulated with poly(styrene-co-maleicanhydride)(PSMA)could be obtained by nanoprecipitation method.Compared with Ph@p TPE Pdots,the Ir@p TPE Pdots with a trace amount of Ir(Ⅲ)complex(1.34‰of Ir(Ⅲ)content,wt)could exhibit 9.9-fold enhancement of the electrochemiluminescence(ECL)signal for visual emission.This work provided a novel strategy on designing highly efficient ECL materials based on trace Ir(Ⅲ)-end capping AIE-active polymer dots.
