[Co(bpdc)(H_2O)_2]_n配合物的合成及晶体结构

合成了一个新的Co2+配合物[Co(bpdc)(H2O)2]n(bpdc=2,2’-bipyridyl-3,3’-dicarboxylato),并通过X-射线单晶衍射测定了其晶体结构.该配合物属单斜晶系,C2/c空间群,晶胞参数:a=11.676(3),b=8.070(2),c=13.028(4),α=γ=90°,β=100.303(3)°;Z=4,D=1.854mg/m3,V=1207.8(6)3;[I>2σ(I)].该配合物为八面体结构,通过Co2+和一个配体bpdc的两个吡啶N原子、另外一个配体bpdc的两个不同羧基的O原子和两个配位水分子的O原子所构成.bpdc作为桥连配体,连接着两个中心Co2+,构成一维无线链,进而通过氢键形成二维网状结构.     

Experimental Research Exploring the Efficacy of Using Spectral Analysis for Dating Persian Ceramics,with a Blue Glaze or Presenting Blue Motifs

This paper presents experimental research on the contribution made by spectral analysis to the identification and dating of Persian ceramics with a blue glaze or blue motifs. Since we know that the characteristic blue colour of these ceramics can vary according to their composition and traditions of manufacture that are specific to the different centuries in which they were created, it would be interesting to determine whether a non-destructive and non-invasive method of analysis would be possible to date the ceramic without altering the object itself. To do this, 72 ceramics from the Royal Ontario Museum of Toronto, as well as 2 other dishes (a Qajar dish from the nineteenth century and a dish from the twentieth century) were photographed and readings of the blue colour present on the objects were processed using the ImageJ software. Colour values obtained were then plotted on a graph and sorted by century for analysis. This study shows that it is possible to date Persian ceramics using a photograph, a spectrometer, and calibrating software, to establish the century in which a Persian ceramic with blue glaze or blue motif was made.     

乙酰丙酮钴(Ⅲ)配合物的合成及其结构表征

合成了乙酰丙酮钴,并对其进行了红外光谱和X-单晶衍射分析。结果表明:配合物组成为Co(C5H7O2)3;单斜晶系,P2(1)/c空间群;晶胞参数a=13.8958(15),α=90;°b=7.4759(8),β=98.4340(10)°;c=16.2242(17),γ=90°;晶胞体积V=1667.2(3)3,Z=4,Mr=356.25,Dc=1.419 Mg/m3;R1=0.0316,wR2=0.0857[I>2sigma(I)]。钴(Ⅱ)在反应过程中被氧化成Co(Ⅲ),与3个乙酰丙酮负离子(acac-)形成了双齿6配位化合物。     

产业链视角下贸易依赖网络结构变动对钴价格的影响

战略性矿产资源产业链产品的贸易网络结构变动可能会对各环节产品价格波动造成影响。本文以钴为例,选取2007—2020年上游钴矿、中游钴酸锂、下游锂电池的贸易数据,构建了钴产业链的贸易依赖网络,并分析了相应网络的结构特征;结合LASSO-PVAR模型及脉冲响应函数,分析了贸易依赖网络结构变动对产业链上中下游产品价格波动的动态影响。结果表明：①钴产业链贸易依赖网络结构呈现出上游钴矿贸易受资源禀赋国主导,中游钴酸锂贸易以少数发达国家为中心形成网络集团,下游锂电池贸易以荷兰、德国、美国、中国等国家为主要伙伴国的特征。②上游钴矿价格主要受到上游和下游贸易依赖强度的影响,中游钴酸锂价格主要受到中游和下游中介控制优势的影响,下游锂电池受到上游和中游贸易伙伴数量以及下游贸易集团化程度影响。③产业链下游锂电池价格受到贸易网络结构变化影响较大,最大波动幅度超过20%;上游钴矿价格受到贸易网络结构变化影响次之,均在10%之内;中游钴酸锂价格受到贸易网络结构变化影响最小,均不超过5%。贸易依赖网络结构变动对价格的冲击影响在第3年之后逐渐消退。本文为探究资源价格影响因素提供了新的研究视角,为战略性矿产资源价格监测工作提供了相关建议。     

醇胺桥连钴(Ⅱ)簇二维配合物合成和晶体结构

报道利用N-甲基二乙醇胺(N-methyldiethanolamine简写为:MedeaH2)分别和1,4-萘二酸(1,4-naphthalenedicarboxylic Acid,简写为:1,4-H2ndc)、噻吩-2,5-二羧酸(Thiophene-2,5-dicarboxylic Acid,简写为:H2tda)合成的两个钴配位聚合物,并通过红外光谱、热重分析、X-射线单晶衍射对其结构进行分析,得知两种配合物均为二维拓扑结构,但其孔道尺寸不同.