生物质巨菌草衍生炭的合成及在超级电容器中的应用

将巨菌草低温预碳化处理,得到粉末炭质材料(JPC),再用不同比例的KOH在不同温度下进行活化处理,得到了以微孔和介孔分布为主的无定形炭材料(JPCK1).所合成的炭材料JPCK1-900-4X的比表面积高达3368 m^(2)/g,具有较大的孔隙体积和0.95%(原子分数)的氮含量.电化学测试结果表明,JPCK1-900-4X在超级电容器应用中表现出优异的储能潜力;在电流密度为0.5 A/g时其比电容为311.7 F/g,电流密度提高到10 A/g时比电容为230 F/g;在电流密度为10 A/g时经过5000次充放电循环后其电容保持率为97.5%;在两电极体系下,当功率密度为250 W/kg时,其能量密度可达17.7 W·h/kg.

Conformation Diversity of Complexes Constructed by N-(2-Pyridylmethyl)-phenylalanine and Zn(Ⅱ)

Four configurationally and conformationally related Zn（II） complexes with a tridentate ligand namely, N-（2-pyridylmethyl）-phenylalanine （Hpmpa）, have been synthesized by hydrothermal reactions. [Zn（L-α-pmpa）2·HaO] 1： orthorhombic, space group P21212 with a = 15.1091（7）, b = 16.2417（8）, c = 5.9972（3） A, V= 1471.70（12）A^3, Z = 2, Mr = 593.97, Dc = 1.340 g/cm^3,μ = 0.879 mm^-1, F（000） = 620, Rint= 0.0205, R = 0.0450 and wR = 0.1578 for 3102 observed reflections with I 〉 2σ（I）; [Zn（D-α-pmpa）2·2H2O] 2： orthorhombic, space group P21212 with a = 15.1023（6）, b = 16.2516（7）, c = 6.0024（2）A, V= 1473.21（10）A^3, Z = 2, Mr = 611.98, Dc = 1.380 g/cm^3,μ = 0.882 mm^-1, F（000） = 640, Rint= 0.0337, R = 0.0484 and wR = 0.1435 for 2408 observed reflections with I 〉 2σ（I）; [Zn（L-β-pmpa）2] 3： monoclinic, space group C2/c with a = 27.8667（5）, b = 5.60350（10）, c = 19.9636（2）A β = 120：2210（10）°, V = 2693.66（7）A^3, Z = 4, Mr = 575.95, De= 1.420 g/cm^3,μ = 0.955 mm^-1, F（000） = 1200, Rint= 0.0345, R = 0.0358 and wR = 0.1135 for 2251 observed reflections with I 〉 2σ（I）; and [Zn（D-β-pmpa）2] 4. They are all mononuclear discrete structures. The influence of temperature and pH on the conformation of structures has been investigated. Moreover, the photoluminescent properties of compounds 1 and 3 are also reported.

福州大学化学一流专业建设的探索与成效

福州大学化学专业是由著名化学家卢嘉锡先生于1958年创建的。经过多年的探索与实践,在一流专业建设中已形成了鲜明的专业特色。本文介绍了福州大学化学专业以卢嘉锡先生的“C3H3”作为教育指导思想,以立德树人为根本,守正创新,通过课程体系、人才培养模式和实践教学体系改革等举措,化学专业建设将嘉锡精神贯穿于人才培养的全过程,取得了一定的成效。

Synthesis, Structure and Near-infrared Luminescence of a Dinuclear Ytterbium(Ⅲ) Complex with a Bis(2,2'-bipyridyl) Ligand

The title complex {Yb（hfac）3}2（bpyC≡CC6H4C≡Cbpy） （hfac = hexafluoroacetyl- acetonate,bpyC≡CC6H4C≡Cbpy=2-（pyridin-2-yl）-5-（2-（4-（2-（6-（pyridin-2-yl）pyridin-3-yl）ethynyl）- phenyl）ethynyl）pyridine） has been prepared and characterized by X-ray crystallography. It crystallizes in the monoclinic space group P21/c with a = 17.240（16）, b = 25.64（2）, c = 16.481（15）A, β = 93.469（9）°, V = 7271（12）A^3, Z = 4, Mr = 2022.91, F（000） = 3888, Dc = 1.848 g/cm^3 and μ（MoKα） = 2.708 mm^-1. The structure was refined to R = 0.0714 and wR = 0.1762 for 9771 observed reflections （I 〉 2σ（I））. Sensitized near-infrared （NIR） luminescence from YbIII centers was achieved through efficient antenna effect or energy transfer from the bridging ligand chromophore.

Syntheses, Crystal Structures and Properties of Two Lanthanide Selenite-carboxylate Compounds

Two lanthanide selenite-carboxylate （LSC） compounds, namely, [Ln8（SeO3）4（2,6- pdc）8（H2O）10]·2H2O （Ln = Pr 1, Sm 2; 2,6-pdcH2 = pyridine-2,6-dicarboxylic acid） have been hydrothermally synthesized and structurally characterized. Both compounds possess two-dimensional layer structures constructed by Ln8（SeO3）4（2,6-pdc）8（H2O）10 clusters connected to each other via bridging carboxylate groups. The structures are further extended into three-dimensional architectures through extensive inter-layer H-bonding between coordinated water molecules and carboxylate groups. The luminescent properties and thermal stability of both compounds have been investigated.

侧链多阳离子型氟化聚芴醚阴离子交换膜及其全钒液流电池性能

阳离子基团的分布对阴离子交换膜的微观相态和阴离子传导率有显著的影响.为开发全钒液流电池用高性能阴离子交换膜,本文通过向含有二甲胺基团的氟化聚芴醚前驱体接枝含阳离子烷基链的方式,合成了具有相似离子交换容量的一系列侧链多阳离子型氟化聚芴醚.实验结果表明,多阳离子侧链的引入能促进微观相分离的形成并提升阴离子传导率.同时,侧链季铵盐离子间的链段原子数可以通过膜的吸水率影响阴离子传导率.具有6个C原子间隔链段的侧链双阳离子DQA-PFE-C6表现出最高的阴离子传导率与选择性.以DQA-PFE-C6为隔膜组装的全钒液流电池在250 mA cm^-2下测得最大能量密度239.80 mW cm^-2,远优于以Nafion^TM 212为隔膜的全钒液流电池.可见,合理的侧链结构设计是提高全钒液流电池用阴离子交换膜性能的有效化学方法.