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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >A series of metal-organic polymers assembled from MCl2 (M = Zn, Cd, Co, Cu): structures, third-order nonlinear optical and fluorescent properties
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A series of metal-organic polymers assembled from MCl2 (M = Zn, Cd, Co, Cu): structures, third-order nonlinear optical and fluorescent properties

机译：由MCl2（M = Zn，Cd，Co，Cu）组装而成的一系列金属有机聚合物：结构，三阶非线性光学和荧光性质

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In this paper four metal-organic polymers {[Zn(fcz)Cl-2]center dot CH3OH}(n) 1, {[Cd(cz)(2)Cl-2]center dot CH3OH center dot 2H(2)O}(n) 2, {[Co(fcz)(2)Cl-2]center dot 2CH(3)OH}(n) 3 and {[Cu(fcz)(2)Cl-2]center dot 2CH(3)OH}(n) 4 ( fcz = fluconazole: alpha-(2,4-difluorophenyl)-alpha-(1H-1,2,4-triazol-1-ylmethyl)-1H-1,2,4-triazole-1-ethanol) were synthesized and characterized by X-ray single crystal diffraction. Polymer 1 consists of 1-D infinite chains arranged along the b-axis. All of polymers 2-4 exhibit a 2-D rhombohedral grid structure. We study the third-order nonlinear optical properties of fcz and polymers 1-4 in DMF solution by using 8 ns laser pulses at 532 nm, and find that 1 and 4 exhibit different NLO properties from fcz and both 2 and 3 show similar NLO properties to fcz. 1 possesses strong NLO refractive effects and large NLO absorptive behaviors. 2, 3 and fcz exhibit strong refractive effects, but their NLO absorptive behaviors are weaker than that of 1. The NLO effects of 4 are very weak. The study of optical limiting (OL) effects by using 40 ps laser pulses at 532 nm shows that fcz and polymer 3 possess a strong OL effect. The optical limiting threshold values of 0.15 J cm(-2) for fcz and 0.16 J cm(-2) for 3 are comparable to those of many heterothiometallate clusters. Polymers 1, 2 and 4 show a weak OL effect. The fluorescent spectra in DMF solution (concentration: 1 x 10(-4) mol dm(-3)) show that polymers 1-4 exhibit different luminescence properties from fcz. The maximum wavelength of polymers 1-3 are blue shifted gradually by 2-12 nm while polymer 4 exhibits a fluorescent self-quenching phenomenon. These results demonstrate that metal ions play an important part in the NLO and fluorescent properties of coordination polymers.
机译：本文中四种金属有机聚合物{[Zn（fcz）Cl-2]中心点CH3OH}（n）1，{[Cd（cz）（2）Cl-2]中心点CH3OH中心点2H（2）O }（n）2，{[Co（fcz）（2）Cl-2]中心点2CH（3）OH}（n）3和{[Cu（fcz）（2）Cl-2]中心点2CH（3 ）OH}（n）4（fcz =氟康唑：α-（2,4-二氟苯基）-α-（1H-1,2,4-三唑-1-基甲基）-1H-1,2,4-三唑-合成并通过X射线单晶衍射进行表征。聚合物1由沿b轴排列的1-D无限链组成。所有的聚合物2-4都表现出2-D菱面体网格结构。我们通过在532 nm处使用8 ns激光脉冲研究fcz和聚合物1-4在DMF溶液中的三阶非线性光学性质，发现1和4表现出与fcz不同的NLO性质，而2和3表现出相似的NLO性质fcz。 1具有很强的NLO折射作用和较大的NLO吸收行为。 2、3和fcz表现出较强的折射作用，但它们的NLO吸收行为比1弱。4的NLO吸收作用很弱。通过在532 nm处使用40 ps激光脉冲进行光学限幅（OL）效应的研究表明，fcz和聚合物3具有很强的OL效应。 fcz的光学极限阈值为0.15 J cm（-2），3的光学极限阈值为0.16 J cm（-2）与许多杂硫代金属酸盐簇的相当。聚合物1、2和4显示出较弱的OL效应。 DMF溶液中的荧光光谱（浓度：1 x 10（-4）mol dm（-3））显示聚合物1-4与fcz表现出不同的发光特性。聚合物1-3的最大波长逐渐蓝移2-12 nm，而聚合物4则显示出荧光自猝灭现象。这些结果表明，金属离子在配位聚合物的NLO和荧光性质中起着重要的作用。

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