亚洲免费av电影一区二区三区,日韩爱爱视频,51精品视频一区二区三区,91视频爱爱,日韩欧美在线播放视频,中文字幕少妇AV,亚洲电影中文字幕,久久久久亚洲av成人网址,久久综合视频网站,国产在线不卡免费播放

        ?

        氫鍵和π-π誘導(dǎo)的三重穿插的二維Znギ配位聚合物的晶體結(jié)構(gòu)和熒光性能

        2013-10-17 03:02:54胡勁松汪茂燦石建軍吳小雨
        無機化學(xué)學(xué)報 2013年1期
        關(guān)鍵詞:勁松氫鍵理工大學(xué)

        胡勁松 汪茂燦 石建軍 吳小雨 何 杰

        (安徽理工大學(xué)化學(xué)工程學(xué)院,淮南 232001)

        0 Introduction

        Thedesignedconstructionof coordinationpolymers from various molecular building blocks connected by coordination bond,supramolecular contacts,has been of great interest due to their intriguing aesthetic structures and topological features[1-2],as well as their potential applications in photochemistry areas[3-4], molecular magnetism[5-6],heterogeneous catalysis[7-8],and molecular sorption[9-10].Recently,a number of multidentate carboxylate ligands have been widely employed to construct coordination polymers with fascinating architectures and interesting properties[11-12].4,4′-[(4-carboxybenzyl)nitrilo]dibenzoate (H3L),a tripod carboxylate ligand which can be regarded as a half-flexible ligand.To test the ability to obtain new architecturesand topologies,we selected this ligand,1,10-phenanthroline (Phen),and Znギsalt to solvothermally synthesize a new coordination polymers[Zn(HL)(Phen)]n(1).The compound was characterized by elemental analysis,IR spectra and X-ray crystallography.In addition,fluorescence of complex 1 was studied.

        1 Experimental

        1.1 Materials and methods

        The reagents and solvents employed were commercially available and used as received.IR absorption spectrum of 1 was recorded in the range of 400~4 000 cm-1on a Nicolet(Impact 410)spectrometer with KBr pellet.C,H,and N analyses were carried outwith aPerkinElmer240C elemental analyzer.Luminescent spectra were recorded with a SHIMAZU VF-320 X-ray fluorescence spectrophotometer at room temperature.The as-synthesized sample was characterized by thermogravimetric analysis(TGA)on a Perkin Elmer thermogravimetric analyzer Pyris 1 TGA up to 1 023 K using a heating rate of 10 K·min-1under N2atmosphere.

        1.2 Synthesis of the compound

        [Zn(HL)(Phen)]n(1):A mixture of Zn(NO3)2·6H2O(15 mg),H3L(20 mg)and Phen(10 mg)was dissolved in 9 mL of DMF/H2O (2∶1,V/V).The final mixture was placed in a Parr Teflon-lined stainless steel vessel(15 mL)under autogenous pressure and heated at 90℃for 3 d.Large quantities of colorless crystals were obtained,which were washed with mother liquid,and dried under ambient conditions(Yield:63%based on H3L).Anal.Calcd.for C34H23O6N3Zn(%):C,64.31,H,3.65,N,6.62;found(%):C,64.17,H,3.91,N,6.86.IR(KBr,cm-1):3 395(w),3 052(w),1 665(m),1 603(s),1 541(s),1 373(s),1 189(m),1 012(w),851(m),790(s),721(s),652(m),582(w).

        1.3 Crystal structure determination

        X-ray crystallographic data of 1 was collected at room temperature using epoxy-coated crystal mounted on glass fiber.All measurements were made on a Bruker Apex Smart CCD diffractometer with graphitemonochromated Mo Kα radiation (λ=0.071 073 nm).The structure of complex 1 was solved by direct methods,and the non-hydrogen atoms were located from the trial structure and then refined anisotropically with SHELXTL using a full-matrix least-squares procedure based on F2values[13].The hydrogen atoms positions were fixed geometrically at calculated distances and allowed to ride on the parent atoms.The crystallographic data are summarized in Table 1,while the selected bond lengths and angles are given in Table 2.

        CCDC:901345.

        2 Results and discussion

        2.1 Crystal structure

        X-ray analysis reveals that compound 1 is solved in monoclinic space group P21/c.The asymmetric unit contains an independent Znギcation,one HL2-anion,one Phen ligand.The cation displays a distortedZnN2O4coordination sphere that can be best described asoctahedralgeometry.In 1,the H3L displays coordination mode with two carboxyl groups coordinated to Znギ,and the third carboxyl group is unprotoned.As shown in Fig.1a,the Znギ center is six coordinated by four carboxylic O atoms from two H2L2-ligands,two N atoms from Phen ligand.The Zn-N lengths are 0.210 5 and 0.207 3 nm,and the Zn-O lengths are in the range of 0.201 9(2)~0.228 4 nm.The dihedral angles between the three phenyl rings in the anion are 54.799(1)°,82.211(9)°and 87.635(1)°.

        Table 1 Crystal data and structure refinement for complex 1

        Table 2 Selected bond lengths(nm)and angles(°)for the complex 1

        The neighboring Znギions are linked by HL2-anions and Phen to form infinitely 1D zigzag chain,the adjacent distance of Zn…Zn is 1.347 0 nm(Fig.1b).Further inspection shows that the carboxyl groups of every two identical chains are actually contacting each other to form 1D ladderlike chain containing hexagon grids by strong H-bonding(d(D…A)=0.2658 nm,d(D…H)=0.085 nm,d(H…A)=0.182 nm,∠(DHA)=168.4°),the size is ~1.15 nm ×2.33 nm(Fig.1c).These ladderlike chains further linked each other by π-π interactions to generate two dimensional wavelike sheets(Fig.1d).The most striking feature of complex 1 is that three identical 2D single nets interlocked each other to form 3-fold interpenetrated network.As shown in Fig.1e,the channels of each network are threaded by two pairs of interactional phen ligands from other two sheets(Fig.1f).

        2.2 Thermal analysis

        To characterize the complex more fully in terms of thermal stability,the thermal behavior of 1 was studied byTGA.Therewasnosolventin the structure,and it decomposed starting at 330℃.

        2.3 Fluorescence properties

        The fluorescence properties of free ligands Phen,H3L,and complex 1 in the solid state at room temperature are investigated.Intense emissions of the freeH3L and Phen ligandswereobserved with wavelength from 380 to 550 nm (λmax=440 and 380 nm),which could be attributed to the π*→π or π*→n transitions.Complex 1 exhibits mission characteristics similar to the free ligands.The emission peaks at 545 nm (λex=400 nm)shows a highly red shift compared with that of the H3L and Phen ligands,which is assigned to the chelation of the carboxylate and Phen to the central metals and the increase of conjugation upon metal coordination.

        3 Conclusions

        In summary,a new complex[Zn(HL)(Phen)]nhas been synthesized under solvothermal conditions.Complex 1 is an infinitely 1D chain,which further to generate 3-fold interpenetrated 2D framework by H-bonded and π-π interactions.The results demonstrate that the non-coordinated carboxyl acids can be well used as the structure-directing tool and can produce various H-bonding in the synthesis ofunusual coordination frameworks.Subsequent works will be focused on the structures and properties of a series of coordination polymers constructed by H3L with more auxiliary ligands and metal ions.

        [1]Ma Y,Cheng A L,Gao E Q.Cryst.Growth Des.,2010,10(7):2832-2834

        [2]Fu J H,Li H J,Mu Y J,et al.Chem.Commun.,2011,47(18):5271-5273

        [3]FU Jun-Dan(傅君丹),YE Li-Qing(葉莉青),ZHANG Chun-Yan(張春艷),et al.Chinese J.Inorg.Chem.(Wuji Huaxue Xuebao),2011,27(1):179-183

        [4]Feng R,Jiang F L,Chen L,et al.Chem.Commun.,2009,45:5296-5298

        [5]Bi Y F,Wang X T,Wang B W,et al.Dalton Trans.,2009,12:2250-2254

        [6]Sarma R,Deka H,Boudalis A K,et al.Cryst.Growth Des.,2011,11:547-554

        [7]Corma A,García H,Llabrés i Xamena F X.Chem.Rev.,2010,110(8):4606-4655

        [8]Huang Y B,Liu T F,Lin J X,et al.Inorg.Chem.,2008,50(15):2191-2198

        [9]Lin J B,Zhang J P,Chen X M.J.Am.Chem.Soc.,2010,132(19):6654-6656

        [10]Chen S S,Chen M,Takamizawa S,et al.Chem.Commun.,2011,47(17):4902-4904

        [11]Lan Y Q,Li S L,Shao K Z,et al.Cryst.Growth Des.,2010,10(8):3490-3492

        [12]TAO Wu(陶武),LIU Jie-Mi(劉杰民),ZHENG Yan-Jun(鄭延軍),et al.Chinese J.Inorg.Chem.(Wuji Huaxue Xuebao),2011,27(12):2419-2424

        [13]Bruker 2000,SMART(Version 5.0),SAINT-plus(Version 6),SHELXTL(Version 6.1),and SADABS(Version 2.03),Bruker AXS Inc.,Madison,WI.

        猜你喜歡
        勁松氫鍵理工大學(xué)
        教材和高考中的氫鍵
        顧勁松
        藝術(shù)家(2024年2期)2024-04-15 08:19:20
        昆明理工大學(xué)
        昆明理工大學(xué)
        昆明理工大學(xué)
        浙江理工大學(xué)
        Simulation and experimental research of digital valve control servo system based on CMAC-PID control method①
        余勁松
        二水合丙氨酸復(fù)合體內(nèi)的質(zhì)子遷移和氫鍵遷移
        銥(Ⅲ)卟啉β-羥乙與基醛的碳?xì)滏I活化
        激情五月婷婷综合| www国产亚洲精品| 日本高清视频永久网站www | 天堂8中文在线最新版在线| 人妻少妇不满足中文字幕| 日韩有码中文字幕av| 精品亚洲第一区二区三区| 国产精品无码aⅴ嫩草| 无码人妻一区二区三区在线视频| 日本一区二区三区啪啪| 一区二区三区免费观看日本| 99久久99久久精品免费看蜜桃| 疯狂做受xxxx高潮欧美日本| 国产超碰人人一区二区三区| 亚洲av调教捆绑一区二区三区| 国产大片内射1区2区| 亚洲精品国产第一区二区尤物| 精品国产91久久久久久久a| 99久久婷婷国产精品综合| 牛牛在线视频| 中文在线а√天堂官网| 亚洲情精品中文字幕有码在线 | 国产青青草自拍视频在线播放| 亚洲国产精品久久又爽av| 粗大猛烈进出高潮视频| 亚洲日韩图片专区小说专区| 国产无套粉嫩白浆内精| 成人区人妻精品一区二区三区| 激情内射亚州一区二区三区爱妻| 韩国主播av福利一区二区| 国产精品女同一区二区软件| 一区二区三区中文字幕| 国产精品久久国产精品99gif| 国产成人综合亚洲国产| 曰批免费视频播放免费 | 丰满少妇被粗大猛烈进人高清 | 91麻豆精品激情在线观看最新| 日本高清一区二区三区色| 最美女人体内射精一区二区| 成人做爰高潮尖叫声免费观看| 无码高潮少妇毛多水多水免费|