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

        ?

        喹啉-8-甲醛乙酰腙鋅/鎘配合物的晶體結(jié)構(gòu)及熒光性質(zhì)

        2018-02-01 06:56:22許志紅吳偉娜劉樹陽
        無機(jī)化學(xué)學(xué)報 2018年2期
        關(guān)鍵詞:化工學(xué)院許昌學(xué)報

        許志紅 吳偉娜 劉樹陽 寇 凱 王 元

        (1許昌學(xué)院化學(xué)化工學(xué)院,化學(xué)生物傳感與檢測重點(diǎn)實(shí)驗(yàn)室,許昌 461000)

        (2河南理工大學(xué)化學(xué)化工學(xué)院,河南省煤炭綠色轉(zhuǎn)化重點(diǎn)實(shí)驗(yàn)室,焦作 454000)

        Schiff bases are an important class of ligands in coordination chemistry and have been found extensive application in different fields[1-2].As one of the most promising systems,the relevant semicarbazones and thiosemicarbazonesinvolve condensed heterocycle,especially quinoline,have been paid much attention due to their potentially biological activities[3-6].However,acylhydrazones,as their structurally analogous,have been paid much less attention[7-8].Recently,several quinoline based acylhydrazone chemosensors for the fluorescent detection of metal ions have been reported in the literature,most of which function by coordination reaction with ions[9-11].Nevertheless,the crystal structures of corresponding complexes are relatively scarce[11].

        Our previous work also shows that the acylhydrazone ligand HL (Scheme 1),namely N-(quinolin-8-yl)methylene)acetohydrazide is an excellent fluorescent probe for the detection for Znギ ions[11].Therefore,in this paper,three Znギ and Cdギ complexes with HL have been synthesized and structural determined by single-crystalX-ray diffraction.In addition,the fluorescence properties of the complexes in CH3CN solution were investigated.

        Scheme 1 Synthesis route of HL

        1 Experimental

        1.1 Materials and measurements

        Solvents and starting materials for synthesis were purchased commercially and used as received.Elemental analysis was carried out on an Elemental Vario EL analyzer.The IR spectra (ν=4 000~400 cm-1)were determined by the KBr pressed disc method on a Bruker V70 FT-IR spectrophotometer.The UV spectra were recorded on a PurkinjeGeneralTU-1800 spectrophotometer.Fluorescence spectra were determined on a Varian CARY Eclipse spectrophotometer,in the measurementsofemission and excitation spectra the pass width is 5 nm.

        1.2 Preparations of complexes 1~3

        As shown in Scheme 1,the ligand HL was produced by condensation of 8-formylquinoline and acethydrazide in ethanol at room temperature according to the literature method[11].The complexes 1~3 were generated by reaction of the ligand HL (5 mmol)with equimolar of ZnSO4,CdCl2and CdI2in methanol solution (10 mL)at room temperature for 1 h,respectively.Crystals suitable for X-ray diffraction analysis were obtained by evaporating the corresponding reaction solutions at room temperature.

        1:Colorless plates.Anal.Calcd.for C12H15N3O7SZn(%):C:35.09;H:3.68;N:10.23.Found(%):C:34.75;H:3.85;N:9.94.FT-IR (cm-1):ν(C=O)1 655,ν(C=N)1 592,ν(C=N)pyrazine1 560.

        2:Colorless blocks.Anal.Calcd.For C12H11N3O Cl2Cd(%):C:36.35;H:2.80;N:10.60.Found (%):C:36.42;H:3.05;N:10.37.FT-IR (cm-1):ν(C=O)1 654,ν(C=N)1 590,ν(C=N)pyrazine1 558.

        3:Colorless blocks.Anal.Calcd.For C12H11N3OI2Cd(%):C:24.87;H:1.91;N:7.25.Found(%):C:25.00;H:2.18;N:7.02.FT-IR (cm-1):ν(C=O)1 646,ν(C=N)1 586,ν(C=N)pyrazine1 555.

        1.3 X-ray crystallography

        The X-ray diffraction measurement for complexes 1~3 were performed on a Bruker SMART APEX ⅡCCD diffractometer equipped with a graphite monochromatized Mo Kα radiation (λ=0.071 073 nm)by using φ-ω scan mode at 296(2)K.Semi-empirical absorption correction was applied to the intensity data using the SADABS program[12].The structures were solved by direct methods and refined by full matrix least-square on F2using the SHELX-97 program[13].All non-hydrogen atoms were refined anisotropically.All the H atoms were positioned geometrically and refined using a riding model.Details of the crystal parameters,data collection and refinements for complexes 1~3 are summarized in Table 1.

        CCDC:1562151,1;1562152,2;1562153,3.

        Table 1 Crystal data and structure refinement for complexes 1~3

        2 Results and discussion

        2.1 Crystal structures description

        The diamond drawings of complexes 1~3 are shown in Fig.1.Selected bond distances and angles are listed in Table 2.As shown in Fig.1a,1 contains one discrete cationic Znギcomplex and one crystal water molecule in the asymmetric unit.The center Znギionwith a distorted octahedron geometry is coordinated by one neutral hydrazone with ONN donor set,one coordinated water molecule and two O atoms from two independent μ2-bridged sulfate anions,thus forming one dimension chain-like framework along b axis.In addition,in the solid state,the chains were further linked into a 2D supramolecular network by intermolecular N-H…O and O-H…O hydrogen bonds(Fig.1d and Table 3).

        Table 2 Selected bond lengths(nm)and angles(°)in complexes 1~3

        Continued Table 2

        Fig.1 Diamond drawing of 1~3 (a~c)with 30%thermal ellipsoids;Extended 2D supramolecular structure in complex 1 (d);Chain-like structures in complex 2 (e,along c axis)and 3 (f)formed by hydrogen bonds (shown in dashed line),respectively

        Table 3 Hydrogen bonds information for complexes 1~3

        Similarly,the hydrazone HL acts as a neutral tridentate ligand in complexes 2 and 3 (Fig.1b and 1c).Coordinated by two additional halide anions(chloride for 2,while iodide for 3),the Cdギ ion adopts a distorted square pyramid coordination geometry (τ=0.348 and 0.345 for complex 2 and 3,respectively)[7].In the crystal,intermolecular N-H…Cl or N-H…I hydrogen bonds link the complex molecules of 2 or 3 into one dimension chains (Fig.1e and 1f).

        2.2 IR spectra

        The FT-IR spectral region for both complexes is more or less similar due to the similar coordination modes of the ligands.The ν(C=O),ν(C=N)imineand ν(C=N)quinolinebands are at 1 673,1 615 and 1 584 cm-1,respectively.They shift to lower frequency values in the complexes,indicating that the carbonyl O,imine N and quinoline N atoms take part in the coordination[7-8,14-15].It is in accordance with the crystal structure study.

        2.3 UV spectra

        The UV spectra of the ligand HL,complexes 1~3 in CH3CN solution (c=1×10-5mol·L-1)were measured at room temperature (Fig.2).The spectra of HL features two main band located around 230 nm (ε=35 288 L·mol-1·cm-1)and 320 nm (ε=16 955 L·mol-1·cm-1),which could be assigned to characteristic π-π*transition of quinoline and imine units,respe-ctively[8].Both bands have no shift while with absorption intensity change in the spectra of complexes 1~3 (ε1=34 327,16 575 L·mol-1·cm-1;ε2=30 131,14 854 L·mol-1·cm-1;ε3=38 244,14 870 L·mol-1·cm-1).This fact supports the neutral mode of the ligand HL in three complexes[7].

        2.4 Fluorescence spectra

        The fluorescence spectra of the ligand HL and complexes 1~3 have been studied in CH3CN solution(c=1 ×10-5mol·L-1)at room temperature.The free Schiff base ligand HL exhibits almost none fluorescenceemission when excited at320 nm,primarily due to C=N isomerization.However,complexes 1 and 2 show remarkable peaks at about 428 and 408 nm under the same tested condition,respectively.Obviously,binding with Zn2+/Cd2+inhibits the isomerization of C=N,thereby increasing the fluorescence intensity through the CHEF mechanism[9-11].In addition,it should be noted that complex 3 gives similar emission as the free ligand because of the heavy atom effect of the coordinated iodide anions.

        Fig.3 Fluorescence emission spectra of the ligand HL,complexes 1~3 in CH3CN solution at room temperature

        [1]Alagesan L,Bhuvanesh N S P,Dharmaraj N.Dalton Trans.,2013,42:7210-7223

        [2]Ye X P,Zhu T F,Wu W N,et al.Inorg.Chem.Commun.,2014,47:60-62

        [3]Bourosh P N,Revenko M D,Stratulat E F,et al.Russ.J.Inorg.Chem.,2014,59:545-557

        [4]Revenko M D,Bourosh P N,Stratulat E F,et al.Russ.J.Inorg.Chem.,2010,55:1387-1397

        [5]MAO Pan-Dong(毛盼東),YAN Ling-Ling(閆玲玲),WANG Wen-Jing(王文靜),et al.Chinese J.Inorg.Chem.(無機(jī)化學(xué)學(xué)報),2016,32(3):555-560

        [6]MAO Pan-Dong(毛盼東),HAN Xue-Feng(韓學(xué)峰),LI Shan-Shan(李珊珊),et al.Chinese J.Inorg.Chem.(無機(jī)化學(xué)學(xué)報),2017,33(4):692-698

        [7]LI Xiao-Jing(李曉靜),WU Wei-Na(吳偉娜),XU Zhou-Qing( 徐 周 慶 ),et al.Chinese J.Inorg.Chem.(無 機(jī) 化 學(xué) 學(xué) 報 ),2015,31(11):2265-2271

        [8]CHANG Hui-Qin(?;矍伲?,YUAN Zhi-Ze(原知則),LAI Xiao-Qing(賴曉晴),et al.Chinese J.Inorg.Chem.(無機(jī)化學(xué)學(xué)報),2016,32(11):2058-2062

        [9]Liu H,Dong Y,Zhang B,et al.Sens.Actuators B,2016,234:616-624

        [10]Ponnuvel K,Kumar M,Padmini V.Sens.Actuators B,2016,227:242-247

        [11]Wu W N,Mao P D,Wang Y,et al.Spectrochim.Acta A,2018,188:324-331

        [12]Sheldrick G M.SADABS,University of G?ttingen,Germany,1996.

        [13]Sheldrick G M.SHELX-97,Program for the Solution and the Refinement of Crystal Structures,University of G?ttingen,Germany,1997.

        [14]Huang Y Q,Zhao W,Chen J G,et al.Z.Anorg.Allg.Chem.,2012,638:679-682

        [15]Huang Y Q,Wan Y,Chen H Y,et al.New J.Chem.,2016,40:7587-7595

        猜你喜歡
        化工學(xué)院許昌學(xué)報
        使固態(tài)化學(xué)反應(yīng)100%完成的方法
        國家開放大學(xué)石油和化工學(xué)院學(xué)習(xí)中心列表
        初到許昌
        【鏈接】國家開放大學(xué)石油和化工學(xué)院學(xué)習(xí)中心(第四批)名單
        致敬學(xué)報40年
        許昌詩群
        天津詩人(2019年4期)2019-11-27 05:04:54
        許昌青春詩會
        中華詩詞(2017年7期)2018-01-22 02:19:56
        《化工學(xué)報》贊助單位
        學(xué)報簡介
        學(xué)報簡介
        久久精品日韩av无码| 老熟女老女人国产老太| 99999久久久久久亚洲| 亚洲美女又黄又爽在线观看| 国产成人亚洲精品77| 日本人妻系列一区二区| 日本高清乱码中文字幕| 蜜桃无码一区二区三区| 黄色网址国产| 白色橄榄树在线阅读免费| 男女视频在线观看一区| 精品久久欧美熟妇www| 中文人妻无码一区二区三区信息| 超短裙老师在线观看一区二区| 国产高清一区二区三区四区色| 欧美精品一区二区蜜臀亚洲| 纯肉无遮挡H肉动漫在线观看国产| 日韩美女人妻一区二区三区 | 91精品啪在线观看国产色| 99国语激情对白在线观看| 人妻熟妇乱又伦精品视频| 真实国产老熟女粗口对白| 国内精品福利在线视频| 国产精品久久久黄色片| 97日日碰人人模人人澡| 国产精品jizz观看| 用力草我小逼视频在线播放| 无码国产精成人午夜视频一区二区| 国产人妻精品一区二区三区| 久久中文字幕日韩无码视频| 亚洲精品中文字幕乱码无线 | 骚片av蜜桃精品一区| av中文字幕在线直播| 免费无码av一区二区三区| 99re在线视频播放| 亚洲人妻av在线播放| 国产成人无码一区二区三区| 亚洲精品久久久无码av片软件| 精品无码国产一二三区麻豆| 一区二区三区四区中文字幕av | 手机看片久久国产免费|