(修改稿)氧化铝纳米薄膜上荧光分子发光特性的研究.docx

多孔纳米氧化铝薄膜上荧光分子的发光特性研究
程玉乔a，1杨耀忠”,b,牛春荣1陈兴国：胡之德a
a兰州大学化学化工学院，兰州， 730000,甘肃，中国
b胜利油田地质科学研究中心，东营市， 257015，山东，中国
摘要：通过两步电化学阳极氧化技术制备了孔径为 40nm的多孔纳米阳极氧化铝材料
(AAO)，在AAO薄膜上分别填充了几种有机荧光分子使其形成高度有序的有机-无机复合 体发光阵列，测定了此复合体的发射光谱。结果表明， AAO薄膜对有机分子具有较强的结
合能力，其结合能力来源于物理和化学的协同作用。在 AAO纳米薄膜上的有机荧光分子的
最大发射波长均产生了明显的蓝移现象， 初步探讨了此现象的机理。有机分子填充进入高度
有序的AAO纳米孔阵列之中时，有机分子的聚集形式会发生改变并且也是高度有序的，同 时由于极化作用使有机分子沿着纳米孔的轴向具有相对优势的分子取向， 这就使得有机分子
在AAO纳米薄膜上形成了接近单分子层的高度有序的排列方式，增强了发光效率。
关键词：多孔 纳米阳极氧化铝；荧光分子； 光谱特性
Photoluminescence Characteristics of Several Fluorescence Molecules on Nanometer Porous Alumina Film
ab * b b a a
CHEN Yu-Qiao , , YANG Yao-Zhong , , NIU Chun-Rong , CHEN Xing-GUO , HU Zhi-De
(a College of Chemistry and Chemical Engin eeri ng, Lan zhou Uni versity, Lan zhou,
730000,Ga nsu Provi nee, .)
(b Geological Seientifie Research Institute, Shengli Oilfield, Dongying City,
257015,Sha ndong Provi nee, )
Abstract: Nan oporous ano die alu minum oxide (AAO), which average size of nan oporous is 40nm, was obtained by two-step electrochemical anodization aluminum process. Highly ordered nano meter porous orga nic- in orga nic composite was fabricated by filli ng in AAO film with fluoresce nee molecules. The results show that AAO membra ne has strong comb in ati on ability with orga nic molecule. The comb in atio n ability comes from the cooperati on of physical and
Corresponding author, E-mail address: ******@ , Fax: +86-931-8912582 chemical actions. The maximum peak positions of emission spectra of fluorescence molecules on AAO film have blue shift. Highly ordered nanometer porous array changed the formation of molecule aggregating and stacking, and polarization leaded to a preferred molecular orientation along the pore axis. It could explain the mechanism of blue shift of molecular luminescence depending on its environment.
Keywords ： nanoporous anodic aluminum oxide; fluorescence molecules; photoluminescence characteristics
纳米材料常常表现出一些新奇的特性，各国科技工作者开发了大量的新材 料，并