低温固相反应合成苯羟乙酸稀土配合物及其性质研究

利用低温固相反应合成了4种苯羟乙酸稀土配合物:RE(L)3·4H2O[RE＝La,Nd,Eu,Tb; L= C6H5CH(OH)COO-],并通过元素分析、稀土络合滴定、摩尔电导及热重分析确定了配合物的组成.红外光谱、核磁共振氢谱表明,苯羟乙酸稀土配合物中配体通过羧基以羧基氧负离子和醇羟基同时参与稀土离子(Ⅲ)配位,两分子水也参与稀土的配位.铕(Ⅲ)、铽(Ⅲ)配合物的荧光光谱和配体的磷光光谱表明,配体对铕(Ⅲ)、铽(Ⅲ)的荧光具有一定的敏化作用.     

铕、铽-2-噻吩甲酸-1,10-菲咯啉三元配合物的合成及荧光性质的研究

同时合成了高氯酸铕、铽与2-噻吩甲酸、1,10-菲咯啉(phen)的三元配合物和高氯酸铕、铽与2-噻吩甲酸的二元配合物,对配合物进行了元素分析、稀土络合滴定、红外光谱、摩尔电导测定,确定了配合物组成分别为REL3·2H2O及REL3L'·C2H5OH(RE=Eu,Tb;L=2-噻吩甲酸,L'=1,10-菲咯啉).摩尔电导数据表明,此类配合物为非电解质.红外光谱测定表明,配体2-噻吩甲酸羧基氧与稀土离子配位,配体1,10-菲咯啉两个氮原子与稀土离子配位.荧光光谱实验表明,1,10-菲咯啉加入到铕-2-噻吩甲酸二元配合物和铽-2-噻吩甲酸二元配合物中形成三元配合物后它们的荧光明显增强.     

对苯二甲酸铕锶、铽锶掺杂配合物的红外光谱及荧光光谱研究

采用稀土掺杂的方法合成了铕锶、铽锶的对苯二甲酸(L)配合物,并对系列配合物进行了红外光谱测定和荧光光谱研究。实验结果表明,共掺杂配合物的羧基氧与稀土离子配位。铽锶配合物T b-S r-L和铕锶配合物Eu-S r-L的发光性能较好。在上述配合物中加入荧光惰性离子Y3+形成T b-S r-Y-L和Eu-S r-Y-L配合物可以使对苯二甲酸铕锶、铽锶配合物体系的荧光得到进一步增强,这可能是由于存在有效的分子内传能,使发光稀土离子Eu3+和T b3+受到敏化作用而使荧光增强;而加入Zn2+和M n2+使体系的荧光减弱,铽锶配合物及其掺杂配合物T b-S r-Y-L是较理想的发光配合物。     

2-噻吩乙酸邻菲啰啉铕、铽配合物的合成表征及荧光性能研究

合成了以Eu3 ,Tb3 及Eu3 ,Tb3 掺杂RE3 (La3 ,Gd3 ,Y3 )为中心,以2-噻吩乙酸和1,10-邻菲啰啉为配体的两个系列8种同核与掺杂稀土固体配合物.对其进行了稀土及C、H和N元素分析、摩尔电导、热谱、红外光谱、核磁共振氢谱的测定及荧光性能研究.确定了配合物的组成为REL3L′和RE0.5Ln0.5L3L′(RE=Eu,Tb;Ln=La,Gd,Y;L=2-噻吩乙酸;L′=1,10-邻菲啰啉,在常温下测定了它们的固态粉末荧光光谱,发现掺杂离子(La3 ,Gd3 ,T3 )使稀土Eu3 离子发光明显增强,讨论了掺杂稀土离子对铕、铽配合物的发光影响.     

对苯基苯甲酸铕、铽配合物的合成、表征及荧光性能研究

分别合成了以对苯基苯甲酸为配体,铕、铽及掺杂铕、铽为中心的固态配合物。经元素分析、摩尔电导及差热-热重分析,推测其组成分别为:铕配合物:EuL3.3H2O、Eu0.5La0.5L3.3H2O、Eu0.5Y0.5L3.3H2O;铽配合物:TbL3.2H2O、Tb0.5La0.5L3.2H2O、Tb0.5Y0.5L3.3H2O(L=■-■-COO-。红外光谱、紫外光谱及核磁共振氢谱分析表明,对苯基苯甲酸的羧基氧原子与稀土离子配位。配合物的荧光光谱测定表明,铕系列和铽系列配合物都可发出其特征荧光,铕异核稀土配合物的荧光强度与相同配体的铕配合物相比,均有不同程度提高。     

高氯酸稀土邻氨基苯甲酸配合物的固相合成及Tb3+的发光

应用固相反应法合成了稀土高氯酸盐与邻氨基苯甲酸的配合物。对配合物进行了组成分析及热谱分析,确定了配合物组成为[RE(LH)2(L)(ClO4)2]·6H2O(RE:Nd,Eu,Tb;LH:C6H4(NH2)COOH;L:C6H4(NH2)COO-)。通过IR光谱、紫外光谱及摩尔电导的测定推测了配位情况。溶解性实验表明配合物可溶于乙醇,但不溶于水。荧光光谱实验表明:固相反应合成Tb3 的高氯酸盐邻氨基苯甲酸的配合物具有良好的荧光性能。     

稀土-对叔丁基杯[8]芳烃二甲亚砜配合物的合成和荧光性能研究

在丙酮溶液中,RE(ClO4)3·(DMSO)n(RE=La,Sm,Gd,Tb,Dy)与对叔丁基杯[8]芳烃(H8L=C88H112O8)反应,合成了5种新的稀土固体配合物,通过元素分析、红外光谱、紫外光谱和摩尔电导等实验进行了表征,确定了配合物组成为[RE2(H2L)(DMSO)5](RE=La,Sm,Gd,Tb,Dy),在常温下研究了它们的固态粉末荧光光谱,结果发现,铽-对叔丁基杯[8]芳烃配合物具有较好的发光性能。     

均苯四甲酸铽发光配合物的合成与表征

在乙醇和水的混合溶剂中,合成了均苯四甲酸铽发光配合物。通过元素分析、化学分析、红外光谱、热分析等确定其化学组成为Tb(HL)·5H2O。X射线衍射分析表明配合物为晶体物质,扫描电镜照片结果表明配合物为棒状物质,晶粒大小10μm～20μm,荧光光谱分析表明配合物在紫外光的激发下发出铽的特征荧光。     

稀土2-噻吩甲酸系列配合物的合成及其Eu3+的发光

合成了6种稀土2-噻吩甲酸(L)配合物.通过元素分析、摩尔电导及差热-热重分析确定其化学组成为REL3·2H2O(RE= Y,La,Pr,Nd,Sm,Eu;L=C4H3SCOOH),测定了配体及配合物的红外光谱、紫外光谱及铕配合物荧光激发和发射光谱.红外光谱测定表明,配体通过羧基以鏊合双齿的方式与稀土离子(Ⅲ)配位成键.荧光光谱数据表明, 铕配合物具有良好的荧光性能.     

铕与三种不同结构羧酸配合物的低温固相合成及发光性能研究

以共轭体系大小不同、配位基团与共轭体系的距离不同的三种羧酸:1-萘甲酸、苯甲酸、苯乙酸和氯化稀土为原料,采用低温固相反应合成了三种羧酸铕配合物.经元素分析、稀土络合滴定、摩尔电导确定了配合物的组成为:Eu(L1)3,Eu(L2)3·1.5H2O,Eu(L3)3·1.5H2O(L1=C10H7COO-,L2=C6H5COO-,L3=C6H5CH2COO-).测定了配体及配合物的的IR谱、1HNMR谱及配体的磷光光谱和铕配合物荧光激发和发射光谱.根据磷光发射光谱数据计算了配体的三重态能级值.三个配合物的荧光发射主峰5D0→7F2强度按萘甲酸铕苯甲酸铕>苯乙酸铕的顺序变化,由此可见配体的结构不同对铕离子的发光将产生很大的影响.     

China's Major Non-ferrous Metals Imports & Exports

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Zinc Production by Province in 2014

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80% of Chinese Firms Purchasing Overseas Mines Ended up in the Red

<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic     

Copper Processing Profit Dropped Sharply,Copper Consumption Will Face Impact in the Second Half of the Year

正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field,     

Central Geological Prospecting Fund Newly Added 16.47 Million Tonnes of Bauxite in 2013

正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF     

Manufacturers of Copper Tube for Central Air Conditioner Use Face Mounting Pressure in the Final Quarter of the Year

正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure     

Xinjiang Ranks No.1 in Production of Primary Aluminum in China

正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year,     

Shenhuo Coal Industry and Electricity Power Completed800,000 t/a Aluminum Project in Xinjiang

正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform.     

Guangdong Metal Transaction Center has Become the Second Largest Precious Metal Transaction Platform Nationwide

正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness.     

Seven Rare Earth Projects Involving Close to 3 Billion Yuan Investment Landed In the HighTech Zone

正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully.