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一种新的有机胺为模板剂的稀土硫酸钐合成

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第27卷第12期 无 机 化 学 学 报 Vo1.27 No.12 2011年l2月 CHINESE JOURNAL OF INORGANIC CHEMISTRY 2453—2458 一种新的有机胺为模板剂的稀土硫酸钐合成, 结构表征以及荧光性质 李 辉1 朱亚林 郑 磊 许 岩 , ( 南京工业大学化学化工学院,材料化学工程国家重点实验室,南京210009) f 大连瑞格中学,大连 116001) 摘要:本文采用正丁醇与水的混合溶剂合成一种新的以有机胺为模板剂的硫酸钐盐:【C2N H 0] [Sm(S04),(H 0)】・2H:O(1),并通 过x一射线衍射、红外、热重及元素分析对其进行了表征。该化合物晶体属于单斜晶系,P2 /c空间群。其中a=O.655 15(9)nm,6: 2.6483(4)nm,c=0.996 ̄503)nm,/3=1o4.0670(1o)。,V=I.6765(4)nm3,Z=4。晶体结构分析显示化合物1中的波浪形层状结构由 SmO。多面体与S0 多面体构成,同时非配位水与乙二胺通过氢键连接相邻的两个层。化合物1具有较强的荧光。 关键词:溶剂热合成法;硫酸钐盐;晶体结构;荧光 中图分类号:0614.33*7 文献标识码:A 文章编号:1001—4861(2011)12—2453—06 Solvothermal Synthesis,Crystal Structure and Luminescence of a New Organic Amine Templated Samarium Sulfate LI Hui ZHU Ya.Lin ZHENG Lei XU Yan , ( College ofChemistry and Chemical Engineering,State Key Laboratory foMaterials—oriented ChemicolEngineering,NanjingUniversity ofTechnology,Nanjing 210009,China) (2Dalian Raigor Middle School,Dalina,Liaoning 1 16001,China) Abstract:A new organic amine templated samarium sulfate[C2NzH10]1 5[Sm(SO ̄3(H20)]・2H20 1 has been synthesized under solvothermal conditions by using a mixture of n—butanol and water as the solvent.The colorless block crystals structurally were characterized by single—crystal X-ray diffraction P21/C with crystal data a=0.655 1 5(9) nm,b=2.648 3(4)nm,c=O.996 15(13)nm,analysis,IR,TGA and ICP.Compound 1 crystallizes in the monoclinic space group/3=104.067 o0o)。,V=I.676 5(4)am ,Z=4.Crystal sturcture analysis shows that the waved layered framework of compound 1 is consturcted from SmO9 polyhedra and sulfate groups,while non-coordination water molecules and ethylenediamine molecules link the adjacent layers by hydrogen bonds.Compound 1 indicates a strong luminescence upon the excitation.CCDC:843656. Key words:solvothermal synthesis;samarium sulfate;crystal structure;luminescence 0 IntrodUCtion ion-exchange[ ̄.The work mainly focused on silicatesIn, phosphites【8-9],phosphates【 0],arsenates【¨- 2],selenites[ 3。 4】 In recent years,much attention has been widely paid on the organically templated open-framework and germinates【 ‘垌.Recently.organically templated inorganic microporous materials because of their wide open—framework metal sulfates have been attracted potential applications in catalysis【 一.separation and much attentionvT" ̄9】.As a building unit.the sulfate 收稿日期:201l-04.22。收修改稿日期:201l-06—24。 教育部博士点新教师基金fN0.20103221120002)资助项目。 通讯联系人。E—mail:yanxu@njut.edu.cn 2454 无机化学学报 第27卷 tetrahedron can be effectively used to construct new 1.2 Synthesis and characterization mieroporous materials with novel stmctures .Compared with other transition metals,the lanthanide centers have A mixture of Sm203(0.21l 3 g),H20(1 mE), — butanol(5 mE),ethylenediamine(en)(0.290 1 g)and sulfuric acid(0.425 l g,98%)was stirred orf 2 h,while the final pH value was 3.The mixture was sealed in a high coordination numbers and a variety of coordination environments to allow the formation of novel topological stuctrure.Nowadays,more and more researches are 24 mL Teflon.1ined autoclave and heated at 1 8O℃for 6 d.The product was washed with deionized water dried at room temperature for l d to give the colorless devoted to the design and synthesis of lanthanide coordination compounds with some different organic ligands.One of the strategies used in synthesis of microporous materials is to employ organic amine as the block crystals.Anal Calcd.(%):Sm,25.67;C,6.15;N, 7.17;H,3.61.Found:Sm,25.71,C,5.85;N,7.35;H, structure-directing agent(SDA).More recently,some metal sulfates have been prepared by using hydrothermally synthesized.For example,lanthanum sulfates l 一绷,neodymium sulfate[241,europium sulfate , iron sulfate E ̄j,and uranium sulfates[27asl。etc.Samarium is an important member in the rare-earth elements because of the excellent luminescence property.But unfortunately, open—framework samarium sulfates templated by organic amines have been not reported. 3.29.IR of 1(am ):3 523(m),3 417(m),l 613(s),1 523 (s),l 146(vs),l 105(vs),754(m),608(s).In the IR spectum ofr the compound 1,the wild band at 3 523 cm~can be attributed to the presence of water.The characteristic bands for ethylenediaminge are in the region 1 420~1 613 cm~.The strong bands 1 146 and 1 105 cm~are characteristic bands for S.O.Absorption at 608 cm一 is due to Sm.O vibration. 1.3 Structure determination Here,we report the first samarium sulfate compound The crystal of compound 1 was carefully singled out under a microscope and glued at the tip of a thin [C2N2Hl0]l 5[Sm(S04)3(H20)]・2H2O(1)in the presence of ethylenediamine as(SDA)structure—directing agent. 1 Experimental 1.1 Materials and methods glass fiber with cyanoaerylate adhesive.Single—crystal stuctrure determination was performed on a Bruker Smart ApexⅡCCD diffractometer at 293 K.sealed tube X—ray source(Mo Ka radiation,A=0.07 1 073 nm) operating at 50 kV and 30 mA.The crystal stucturre was solved by the direct method and refined on F by full・-matrix least-・squares using the SHELX97 program package【29[.All non—hydrogen atoms were refined aniso— All chemicals purchased were of reagent grade and used without further puriifcation.The element analysis for Sm was performed on Leeman inductivity coupled plasma(ICP)spectrometer,while the C,H and N analyses were performed on a Perkin—Elemer 2400 tropically.Hydrogen atoms were introduced in calculated positions and included in the refinement, riding on their respective parent atoms.Further details of the X—ray structural analyses for compound 1 is given elemental analyzer.IR spectum was rrecorded on a Nicolet Impact 410 FrIR spectrometer using KBr pellets in 4 000 ̄400 cm~region.Thermogravimetrie analyses were carried out in N2 atmosphere on a Diamond thermogravimetric analyzer from 50 to 1 100 in Table 1 and selected bond lengths and angles are 1isted in Tab】e 2. CCDC:843656. ℃with a heating rate of 10℃・min~. Table 1 Crysml data and structure refinement for compound 1 Empirical formula C3Hl9N3015S3Sm Absorption coeficifent/mm一 3.958 Formula weight 583.74 F(O00) 1152 Temperature/K Wavelength/nm Crystal system Space group 296(2) O.071 073 Monoclinic P2 L|c Crystal size/mm 0 range/(。) h/k/f Refleetions collected 0.13x0.12x0.10 1.54-25.02 一7,7/一31,31/一11,11 l1 819 第12期 李辉等:一种新的有机胺为模板剂的稀土硫酸钐合成结构表征以及荧光性质 ,2457 Continued Table 3 ∞ ∞ ∞ 如 ∞ 如 2.2 Thermal analysis for the luminescenee of Sm ions Thermal analysis shows that the total weight loss of 1 is 69.1%(calcd,70.23%).As shown in Fig.4.the weight loss of 9.7%in the range of 20~300 oC corresponds to the removal of the lattice and COor. dinated water molecules fcalcd.9.23%1.The second step loss of 16.2%in the range of 300~350 oC can be attributed to removal of ethylenediamine fealed. 15.91%),the weight loss of41.2%in the range of 350 1 100 oC can be attributed to loss SO3 fcalcd41.0%). .The final product iS Sm2O . Wavelength/nln Fig.5 Solid—state emission spectra of 1 at room temperature 3 Conclusions 摹 In summary,we have successfully synthesized ≥ samarium sulfate【C2N2HloJ [Sm(SOs)3(H20)]・2H20 by using Hz0/n-butyl alcohol as solventThe cornpound .exhibits of a novel 2D zigzag layer structureand the ,layers are further connected by(H20)2 groups via hydrogen bonds interactions to fo肿l emperature/ a soft 3D Fig.4 TG curve of compound 1 supermoleeular open frameworkWhile the protonated .ethylenediamine are inserted in the channels of the 3D 2.3 Photoluminescence stuctrure and make the structure more stable through Optical property investigation shows compound 1 exhibits excellent luminescent propertyAs shown in .the hydrogen bonding interactionsThe luminescent .spectra of the compounds reveal that the rare.earth organic template sulfates not only possess luminescence Fig.5,the photoluminescence spectrum of COmpound 1 possesses the emission characteristic peaks of Sm3 i0n. nature but also become promising photoluminescence materials. 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