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1、第25卷第11期无机材料学报Vol.25No.112010年11月JournalofInorganicMaterialsNov.,2010文章编号:1000-324X(2010)11-1133-06DOI:10.3724/SP.J.1077.2010.01133荧光发色团插层镁铝水滑石的制备和光物理性质1122李蕾,张立,陈大舟,汤桦(1.北京化工大学化工资源有效利用国家重点实验室,北京100029;2.国家标准物质研究中心,北京100013)-摘要:以层状镁铝水滑石[Mg0.66Al0.34(OH)2](CO3)0.17·0.67H2O
2、为主体,通过离子交换法,分别将乙基橙(EO)和4-氨基偶氮苯基-4-磺酸阴离子(4A)插入到层状镁铝水滑石层间和吸附在镁铝水滑石表面.插层产物及表面吸附产物分别采用XRD、IR、TG-DTA等测试技术进行结构表征,采用UV-Vis吸收光谱和荧光光谱研究其光谱特征.并用G03w软件包中abinitio分子轨道法(HF/6-31G)计算了客体分子结构和电荷分布,认为客体阴离子以单层形式垂直排布于层板之间.结果表明,客体进入层间后,由于客体与主体的相互作用,在限域空间内客体微环境的改变造成荧光发射强度发生改变,与纯客体相比EO插层产物的荧光强
3、度提高,而4A插层产物的荧光发射强度却大大减弱,EO与4A的吸附产物荧光发射强度均降低,说明通过主体与客体或客体与客体的相互作用可以改变客体的光物理性质.关键词:水滑石;插层;乙基橙;4-氨基偶氮苯基-4-磺酸盐;光物理性质中图分类号:O641文献标识码:APreparationandPhotophysicalPropertiesofChromophoresPillaredMg-Al-LDH1122LILei,ZHANGLi,CHENDa-Zhou,TANGHua(1.StateKeyLaboratoryofChemicalResourc
4、eEngineering,BeijingUniversityofChemicalTechnology,Beijing100029,China;2.NationalResearchCenterforCertifiedReferenceMaterials,Beijing100013,China)Abstract:Ethylorange(EO)and4-aminoazobenzene-4-sulfonicanion(4A)wereintercalatedintothelayereddoublehydroxide(LDH),[Mg0.66Al
5、0.34(OH)2](CO3)0.17·0.67H2Oorexchangedontheexternalsurfaceofthehostbythemethodofion-exchangeprocedures.TheobtainedcompoundswerecharacterizedbyX-raydiffraction,in-fraredandthermogravimetrytechniques.ThephotophysicalpropertiesoftheobtainedcompoundswerestudiedbyUV-Visabsorpt
6、ionandfluorescencespectroscope.Theguestmolecularsizesandstructureswereinvestigatedutil-izinganabinitio(HF/6-31G)methodbyG03w.Theseanionswerearrangedintheinterlayerspaceasamonolayerofspecieswiththemainaxisperpendiculartothelayerplane.Theseresultsindicatedthatthefluorescenc
7、eofin-tercalatedsampleofMg-Al-EO-LDHincreasedgreatlyduetoamorerigidandconstrainedenvironmentofthehost.However,thefluorescenceofintercalatedsampleofMg-Al-4A-LDHdecreasedduetotheconcentrationquenching.ComparedwiththoseobservedinthepuremicrocrystallineEOand4A,thefluorescence
8、intensityofthesamplescontainingonlysurface-exchangedEOor4Areducedbecausethechargetransferbetween
