键连在MCM-41哌啶萘酰亚胺的光化学性能
Journal Title: Science Paper Online - Year 2009, Vol 4, Issue 3
Abstract
通过4-哌啶-1, 8-萘酐与氨基化MCM-41反应，在孔道中键连生成4-哌啶-1, 8-萘酰亚胺。红外光谱证明在介孔孔壁表面上确实生成了酰胺键。小角X射线衍射(XRD)显示掺入染料分子后，杂化介孔材料的衍射峰强度只有轻微下降。紫外可见光(UV-vis)漫反射光谱表明染料分子在乙醇稀溶液和介孔分子筛中的吸收峰位置均为426 nm，这说明染料分子是以单分子形式嫁接在MCM-41孔壁表面。相对于在乙醇溶液中的哌啶萘酰亚胺(535 nm)，物理吸附在MCM-41上的哌啶萘酰亚胺最大荧光发射峰位置红移至543 nm，而键连在MCM-41哌啶萘酰亚胺的发射峰发生更大红移，至548 nm，这主要是由于介孔孔道的限域效应引起的。电子顺磁共振波谱表明键连染料的MCM-41介孔材料经紫外照射后存在一定量自由基。
Authors and Affiliations
Guodong CHEN, Lingzhi WANG, Lei WANG, Jinlong ZHANG
Keywords
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