新型三维超分子化合物{[Co(H_2bptc)(ptcp)(H_2O)_2]·H_2O}_n的水热合成和晶体结构
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第26卷第l2期 2010年12月 无 机 化 学 学 报 V01.26 No.12 2280—2284 CHl ESE J OURNA1 OF INORGANIC CHEMISTRY 新型三维超分子化合物{[Co(H2bptc)(ptcp)(H20)2]・H20} 的水热合成和晶体结构 王湘成t 刘春波 ,2 李秀颖 李春香 车广波-X-,l,2 闫永胜 , f 江苏大学化学化工 学院.镇江2120131 f 吉林师范大学化学 学院.四平 1360001 关键词:钻配合物;3,3 ,4,4 一联苯网甲酸;超分子结构 中图分类号:0614.81+2 文献标识码:A 文章编号:1001—4861(2010)12—2280—05 Hydrothermal Synthesis and Crystal Structure of a Novel 3D Supramolecular Complex{[Co(H2bpte)(ptcp)(H20)2】・H20 WANG Xiang—Cheng LIU Chun—Bo , LI Xiu-Ying LI Chun—Xiang。 CHE Guang—Bo , 。。YAN Yong—Sheng ’ ( School fJ厂CheⅢistry(ind Chemical Engineering,Jia,lgsu University, enjiang, ̄a!tgsu 21 201 3) ( Department ChemLstry,Jilin Normal University,Siping,Jilin 1 36000) Abstract:A novel cobah(11)complex with biphenyl一3,3 ,4,4 一tetracarboxylic acid(H4bptc)and 2-phenyl一1,3,7,8一 tetraazacyclopenta【1]-phenanthrene(ptcp),{[Co(H2hptc)(ptcp)(H20)2]・H20}, (1),has been synthesized by hydro- therinal method and was characterized by elemental analysis,single crystal X—ray difraction and thermal gravimetry (TG).It crystallizes in monoclinic,space group Pn with a=0.7 19 44(14)nm,b=1.259 4(3)nm,c=1.68 1 9(3)nm,卢= 93.30(3)。,V=1.521 5(5)nln ,Z=2,C35H26CoN4O11,M =737.53,D .=1.610 g・cnl ,/ ̄(Mo Ko0=O.639 mm~,F(000):758, S=1.024 R 1=0.076 7 and wR。=0.1 20 6.The structural analyses reveal that the title complex iS a 1 D zigzag chain strcture along the C axis,which is stacked to furnish a three—dimensional supramolecular net structure via hydrogen bonding interactions.CCDC:793796. Key words:cobalt complex;biphenyl一3,3 ,4,4 一tetracarboxylic acid;supramolec.ular structure 0 Introduction nonlinear optics1 .but also because of their intriguing variety of architectures .In these complexes,weak IMetal—organic polymeric frameworks have been internmlecular forces.such as hydrogen bonding.7r一7r stacking,dipole—dipole attractions and van der Waals interactions,have been studied in depth and can be used in the design of molecular solids with speciifc rapidly expanding in recent years not only because of their potential applications in gas adsorption,ion exchange,magnetism,catalysis,luminescence and 收稿日期:2010.06.01。收修改稿H期:2010.O8.08= 江苏省博士后基金项目(No 0801010B),江苏大学自然科学基金(N0.o9JDGO01)资助。 通讯联系人。E-mail:guangIJ0chejl@yah00.COIll,yys@ujs.edu cn 第 作者:王湘成,男,25岁,硕士研究l牛;研究方向:配合物化学。 第l2期 王湘成等:新型_维超分子化合物{fC0(H bptc)(ptcp)(H 0) ・H 0) 的水热合成和晶体结卡勾 2281 supramolecular structures and functions .The self- 0assemblies of supramolecular complexes can be achieved by controlling the noncovalent interactions among the ligands,which are,in most casts,organic groupslll_ . 1 Experimental 1.1 Physical measurements The ptcp ligands were prepared by the literature methodI I.A11 other chemicals purchased were of reagent grade or better and were used without further purii— fcation.Elemental analyses were performed with an Perkin—Elmer 240C element analyzer.Thermogravi— Therefore,an enormous amount of research is being  ̄cused on constructing novel coordination polymers by choosing versatile organic ligands.Aromatic polycar— boxlic acids as versatile ligands have been used widely in constructing the metal-organic polymeric frameworks for the reasons as follows :fi1 the mutiple coordiantion sites;(ii)the mutiple 7r—bonds of the aromatic rings;(iii) the excellent hydrogen—bonding abilities;(iv)the long aromatic ligands can form large channel with metal ions.Based on the above causes,the biphenyl一3,3 ,4,4 一tetraearboxylie acid(H4bpte)ligands are choosed to design and synthesize the novel MOFsl l41. On the other hand,phenanthroline(phen)are used mostly as secondary ligands in the metal containing supramolecular for the good coordination abilities which can enhance the stability of the polymers,as well as large仃一conjugated planes which can generate various cooperative CH…7r/NH…7『and 7r…仃stacking interactions To enlarge the phen仃一conjugated planes. one of the effective methods is connecting another plane in the positions 5 and 6l161.So some ligands such as dppzl1 7_.dpql l8_are used in constructing new structures and application.In these ligands,the N atoms in the distended plane are just H—acceptor which is the defects to ofrm metal—organic supramolecule.Herein,2一 phenyl-1,3,7,8一tetraazaeyclopenta[1l_phenanthrene(ptcp) ligand was synthesized to design MOFs in which the imidazole rings both are the H—donor and H—accepter. dppz ptcp In this work,we report a novel complex {[C0(H2bptc)(ptcp)(H20)2l H20} ,which is a one dimen— sional zigzag ehainlike motiL and then form a 3D supra— molecular structure via hydrogen-bonding interactions. And the thermal stability has been investigated too. metric analysis(TGA)was performed on a NETZCH STA 449C with a heating rate of 10℃・rain一 under an air atmospher. 1.2 Preparation of complex 1 Complex 1 was synthesized by hydrothermal reaction of Co(N03)2(0.05 8 2 g,0.2 mmo1),H4bptc (O.066 0 g,0.2 mmo1),ptcp(0.059 2 g,0.2 mmo1)and NaOH(0.016 0 g,0.40 mmo1)in an aqua solution(18 mE).The mixture was sealed in a 25 mL Teflon reactor, which was heated to 160 for 3 d and then cooled to room temperature.Pale yellow single crystals of complex 1 suitable for X—-ray single--crystal diffraction analysis were obtained fyield 58%1.Ana1.ealc.for C35H26CoN4Oll(%):c 56.98;H 3.53;N 7.60;found(%): C 56,90;H 3,55;N 7 64, 1.3 Structure determination Suitable single crystal with dimensions of 0.235 mm x0.037 mm x0.0 1 3 mm was mounted on glass ifber and reflection data were collected at room temperature on a Bruker AXS SMART APEX II CCD diffract0n1eter equipped with a graphite monochromatized Mo Ka radiation(A=0.07 1 073 nm)at 292(2)K by using an 一 scan mode.A totaJ of 14 39 1 reflections were colle— cted in the range of 3.02。≤ ≤27.45。.of which 6 349 were unique with RiⅢ=0.1 36 1.A semi—empirical absor・ ption correction based on SADABS was appliedI驯.The structure was solved by direct methods and refined by full—matrix least.squares based on F using SHELXTL一 97 program .All non—hydrogen atoms were refined anisotropically,and the hydrogen atoms of organic ligands were generated geometircally.Crystal data and details of the data collection and the sturcture refinement are given in Table 1.The selected bond lengths and bond angles are listed in Table 2 CCDC:793796. 2282 无机化学学报 第26卷 Table 1 Crystal data and structure refinement for complex 1 Formula Formula weight C H N4OllCo 737.53 D./(g-cnl H0001 1 610 758 Fempmature/K Custal system 292(2) Motmelinic Co'stal size/hill1 0/f。1 O.235x0.037x0.013 3 02 to 27.45 Space group nz Limiting indices 一9≤^≤7.一16 ̄<k≤16.-21≤f≤2l a/nol b/nnl c/nFll 0.719 44I141 I.259 4(3) 1.681 9(31 Reflections collected/unique( :) Go0dncss ot fit on F Data/restraints/paran)elers l4 391/6 349(0.136 1) 1.024 6 349/8/454 /(。) V/nnl z 93 30(3) 1.521 5(51 2 Final R indices(1>2o-(/)) l,mgest dif.peak and hole/(e・nil)。)Rl=0.076 7,wR2=0.120 6 434 and-400 Table 2 Selected bond lengths(am)and angles(。) Co.0f1W 0206 6(41 0 2】3 3(41 Co一0(7) Co-N(21 0.209 3(4) Co—O(2W1 Co—Nf11 0.209 8(4) 0.216 5(51 Co一0f1) 0.215 9(51 o(1Ⅵ1一Co一0(71 Od 1一Co—oo 1 o(1 1・Co—N(21 oo)一Co—N(2) 0(2W)一Co-N(1) 89.68f 6) 82馏2f 8) 97.75f 9) 106.75f 8) 1O0.78f 71 o(1、、)一Co—O(2w) ()f7)一Co—o(J J 171.11f151 0(7)一Co—o(2w) o(2w)一co—o(1) o(2 ̄x Co—N(2) ()f71・Co—N(11 Nf21一Co—N(I1 89.05r171 88.32f17) 86.】5(18) l65 76f181 0f71一Co—N(21 85.43(1 9) 92.18(17) 76.03(1 8) o(1、、1一Co—N(I、 o(1)一Co-N(1) 88.06f】81 1 70.7(21 2 Results and discussion not reported as yet. ——卜CO 2.1 Description of crystal structure A single—crystal X—ray analysis reveals that complex 1 is a 1 D zigzag polymeric coordination chain. Seheine 1 Coordination modes of H4bpte in the An asymmetric unit[Co(H2bptc)(ptcpJ(H20)21.H20 contains one six—coordinated cobalt ion,one H2bptc , one ptep ligands,two coordination water and()lie free title complex water molecule.In 1,the cobalt center adopts a distorted octahedral geometry by linking to two nitrogen atoms of one chelating ptcp ligands,four oxygen atoms in which two oxygen atoms(O(1),O(7))of two monodentate carboxylate groups flom two H2bptc SymmetlT codes:A: +1/2,一)+1,z+l/2;rhermal Jipsoids are ligands and the other two oxygen atoms(O(I W),O(2W)) are from two coordinated water as shown in Fig.1.Co—O drawn at the 30%probability level,the hydrogen atoms are omitted for clarity bond lengths fall in the range 0.206 6(4)~0.2 1 3 3(4)nm, Fig.1 V iew of the coordination environment of Co(1I) in complex 1 and Co—N bond lengths are 0.2 1 5 9(5)(Co—N(2))and 0.216 5(5)nm(Co—N f1)).These values are within the normal experimental limitation.It is well—known that To distinctly investigate the structures for rfameworks,it would be important to explore the connection modes of the metal centers and organic H4bpte ligands have possibly many types of eoordina tion modes but to our knowledge the coordination ligands.In 1,each H2bpte 一links two Co(II)ions by means of bridging coordination mode which generates a modes fScheme 1)of H4bpte ligand in complex 1 have 第12期 王湘成等:新型_三维超分子化合物“Co(H山pk)(ptcp)(H O) 】-H ,ol 的水热合成和晶体结构 2283 one・dimen sional zigzag chain.The long ptcp ligands play a templet role becau ̄of t heir steric effect and they are decorated at both sides of the zigzag chian that which occursween carboxylate O(6)and N(3),and 一 8 betthe other is N—H…O tyFe hydrogen bonds ̄tween N— H 0f imidazole antl water mdeculer,.In addition.th e. look like a zipper fFig.2a1. A fa ̄inating and peculiar structural featu e is rthat ther.eare mulfiplicate hydrogen bond bridges involving water molecules and carboxylate anions as well as the imidazole ting 0f prep ligands.The imidazole tings 0f ptcp ligands can pr.vide one eg lal tice water oowl sen e as H—donor and interact with ≯ he carboxylate oxygen atoms c tf the H2bptc 一ligands Fig.213.S0 a 3D supramolecular net structure..is formed via those hydrogen bonding as shown in Fig..2e.The hydrogen bond distances and angles are.selected to show in rI'able 3. coordination latitce water mdecules O(1 w),o(2w ̄I and hydrogen bonding donors and one N accepter which lead lo two strong hydrogen bonds.One is the.O-H・・・N (a) (c) Symmety codes(rb):A: 一1,y+l, ;B: 一1,Y, ;C: 一1/2 -y+l,z-l/2;D:x,y+1. :E:x-l12,一y+2,。一1/2;F: ,ly, 一1 Fig.2(a)Views()f tl1e structural m0t in 1,1 D eovalently bonded chain,all hydrogen atoms alP.I3mitted for clarity; (h)hydrogen bonding interactions in colnplex 1 viewe(1 along c axis;(c)3D supramolecular net structure construeted by hydrogen bonding Table 3 Distances and an ̄es of hydrogen bonds fo r complex 1 Symmetry codes:A: ,y+l,z+l;B:x+l12,,--y.。一1/2;C: 一1/2.',, 一1/2;D: 一1,Y.z;E: +1/2,--y+1.z+l/2 —,2284 无机化学学报 第26卷 2.2 TG analysis Complex 1 is stable at ambient conditions and thermogravimetric experiment was performed to explore its thermal stability.For 1,the first gradual weight loss is 2.47%ii1 the temperature range of 80 to 110℃ (calcd.2.44%),corresponding to the release of one free water molecule.The second step f4.90%1 from 190 to 220℃is attributed to the release of two coordinated water molecules fcalcd.4.88%1.The third weight loss of 40.15%i13 the 300~350℃range is attributable to the removal of ptcp ligands fcalcd.40.1 8%1.The last weight loss of 44.48%is ascribable to the lOSS of H2bptc 一fcalcd.44.50%1 rfom 380 to 460℃.The final product may be Co0. 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