具有银-银相互作用的二(3-吡啶基)嘧啶-银髣配合物及其荧光性质(英文)

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第27卷第9期 2011年9月 无 机 化 学 学 报 CHINESE JOURNAL OF IN0RGANIC CHEMISTRY Vo1.27 No.9 1842.1846 具有银一银相互作用的--(3.吡啶基)嘧啶一银(I)配合物及其荧光性质 口 口 梅芳 王 鹏 赵越 王志斌 孙为银 (南京大学化学化工学院,配位化学国家重点实验室,配位化学研究所,南京210093) 摘要:用分层法合成了两个配合物[Agz(L)2I(CF3COO):(1)和【Agz(L)2](cF,s03):(2)【L=2.甲基.4,6一二(3,吡啶基)嘧啶】,并用元素分析、 红外光谱、X-射线单晶衍射等手段对其进行了表征。晶体结构分析结果表明:具有双核大环结构的配合物1和2由Ag(I)…Ag(I) 相互作用连接形成一维链状结构,并进一步通过仃一7r相互作用形成二维层状结构。研究了配合物2的荧光性质。 关键词:银(I)配合物;银一银作用;仃一7r作用;荧光性质 中图分类号:O614.122 文献标识码:A 文章编号:1001-4861(201 1)09—1842—05 Silver(I)-Dipyridylpyrimidine Interactions and Their Complexes with Argentophilic Luminescent Properties LU Mei—Fang WANG Peng ZHAO Yue WANG Zhi-Bin SUN Wei—Yin (Coordination Chemistry Institute,State Key Laboratory of Coordination Chemistry, School ofChemistry and Chemical Engineering,Nanjing University,Nanjing 210093,China) Abstract:Two silver(I)complexes[Agz(L)d(CF3COO)2(1)and[Ag2(L)zl(CF3SO3)2(2)[L=2.methyl 4,6一di(pyridin一3一 y1)pyrimidine]were synthesized and characterized by elemental,IR and single crystal X—rav difraction analyses. The binuclear complexes 1 and 2 form infinite 1 D chains through argentophilic interactions,and further extend into 2D supramolecular networks by 7r.7T interactions.The phot0luminescent measurements reveal that complex 2 exhibits fluorescent emission in the solid state at room temperature and the luminescent decay time was determined.CCDC;827908,1:827909,2. Key words:silver(I)complex;argentophilic interaction;7r一7r interaction;photoluminescence prope ̄y 0 Introduction The rational design and synthesis of transition metal coordination frameworks have captured increasing interest of chemists due to their potential applications in the areas of catalysis,gas storage, magnetism,optics and SO on【 .To now,many efforts have been devoted to the design of organic ligands with suitable flexibility and coordination groups to construct multi-dimensional frameworks through coordination interactions。In addition。the reported studies show that intermolecular weak interactions such as hydrogen bonding,7r-仃,metal—metal interactions also play important role in the formation of supramolecular architectures[6-8].Among them,silver.silver interaction is known as argentophilicity and found to be weaker than the gold—gold interactionN,but is one of important intermolecular interactions in crystal engineering_l0J. Furthermore,the synthesis of silver(!)comp|exes with argentophilicity has attracted great interest because of their possible applications in photoluminescent 收稿13期:2011-03—31。收修改稿日期:2011-04.15。 国家自然科学基金重点(No.2O731o04)资助项目。 通讯联系人。E-mail:wangzb@nju.edu.cn,Tel:(025)83621l96;会员登记号:S06N5818M1005。

 第9期 吕梅芳等:具有银一银相互作用ff ̄(3.吡啶基1嘧啶一银(I)配合物及其荧光性质 1843 materials【 ]and catalysist . Here we report the synthesis,structures and photophysical properties of two silver(I)complexes generated from reactions of 2-methyl-4,6一di(pyridin一3一 y1)pyrimidine(L)with different silver(I)salts,namely [Agz(L)2](CF3COO)z(1)and[Ag/(L)2I(CF SO3)2(2).These two complexes form 1 D chains by argentophilic interactions which are further linked by丁『-7r interac— tions to give 2D layer structures.The photolumines- cence properties of the complexes were investigated. 1.1 Materials and measurements All commercially available chemicals were of reagent grade and were used as received without further purification.The ligand L was prepared by(2 一1,3一Bis f3-pyridy1)propenone and acetamidine hydrochloride according to the literature methodo41. Solvents such as methanol(CH3OH),dichloromethane(CH2Cl2) were purified according to the standard method.All procedures for synthesis of Ag(I)complexes were carried out in the dark.Elemental analyses were performed on a Perkin—Elmer 240C Elemental Analyzer at the analysis center of Nanjing University.IR spectra were recorded on a Bruker Vector22 FTIR Spectro- photometer.The luminescent spectra for the powdered solid samples were recorded at room temperature on an Aminco Bowman Series 2 spectrophotometer with xenon arc lamp as the light source.The fluorescence decay for the powdered solid sample was recorded at room temperature on a FLS920 spectrophotometer with EPL. 405 as the laser source,and the pass width was 5.0 nm. 1.2 Syntheses of the complexes 1.2.1 Synthesis of[Ag2(L)2](CF3COO)2(1) A buffer layer of MeOH/CH2C12(1:1,8 mE)was carefully layered over a dichloromethane solution f3 mL)of L(12.3 mg,0.05 mmo1),then a methanol solution(3 mE)of Ag(CF3CO0)(1 1.0 mg,O.05 mmo1) was layered over the buffer.1ayer.Colorless block crystals were obtained after two weeks in about 50% yield.Ana1.Calcd.for C17H12AgF3N402:C,43.52;H, 2.58;N,1 1.94.Found:C,43.42;H,2.49;N,12.10.IR data(KBr pellet,cm ):1 678(s),1 593(s),1 537(m), 1 480(w),1 395(w),1 321 w),1 204(m),1 128 m),l 027 (w),808 w),722(w),656(w),583(w). 1.2.2 Synthesis of[Ag2(L)2](CF3SO3)2(2) The complex 2 was synthesized by the same procedures as those used for complex 1 except that Ag(CF3COO)was replaced by Ag(S03CF3)(12.8 mg, 0.05 mmo1)in 50%yield.Ana1.Calcd.for(C16H12Ag F3N403S):C,38.04;H,2.39;N,l1.09.Found:C,37.96; H,2.49;N,l1.2O.IR data(KBr pellet,cm ):1 593 (s),1 538(m),1 482(w),1 430(w),1 394(w),1 255(s), l 161 m),l 028(s),812(w),695(m),635(s),5 17(w). 1.3 Crystal structure determination Crystallographic data of complexes 1 and 2 were collected at 293 K on a Bruker SMART CCD system equipped with graphite--monochromated Mo Ka radia・- tion =0.07 1 073 nm)using 一 scan technique.Difr— action data were integrated by the SAINT program【悯. which was also used for intensity corrections for Lorentz and polarization effects.Semi—empirical absorption correction was applied using SADABS【垌.The structures were solved by direct methods and all non-hydrogen atoms were refined anisotropically on F by full—matrix least--squares using the SHELXL・・97 crystallographic software package[切.Hydrogen atoms of L in 1 and 2 were generated geometrically.Details of the crystal parameters,data collection,and refinements for 1 and 2 are summarized in Table 1.Selected bond lengths and angles for 1 and 2 are listed in Table 2. CCDC;827908,1;827909,2. Table 1 Crystal data and structure refi