负载罗丹明B的MCM-41在原位高压下的荧光性质研究
首发时间:2013-01-06
摘要:罗丹明B(Rhodamine B,RB)具有良好的发光性质,但易发生团聚,导致其光学活性消失。若避免这种团聚的发生则可以扩宽这类有机染料分子的应用领域。本文采用液相交换法将客体分子罗丹明B负载至介孔材料MCM-41中,形成复合材料,并对该主客体复合材料进行原位高压下的荧光光谱研究。结果表明,由于MCM-41的孔道具有一定的支撑作用使得罗丹明B由于压力导致的团聚效应减弱,可以使其在较高的压力下仍可发光。同时,负载到MCM-41中的罗丹明B的荧光发射峰波长范围也比负载到无定形SiO2中的要宽大约2倍。
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Luminescent properties of rhodamine B loaded MCM-41 under in-situ high pressures
Abstract:Rhodamine B has good optical properties, but the optically activity is easy to disappear because of the aggregation-caused quenching (ACQ). Avoiding such ACQ effect can expand the application of rhodamine B. In this work, the rhodamine B loaded MCM-41 was prepared by using liquid-exchange method. Then the luminescent properties measurement of this host-guest material was performed under in-situ high pressures. The results show that MCM-41 can weaken the aggregation of rhodamine B under high pressures. Meanwhile obvious peak shifts have a broader band (about two times) comparing with that loaded on amorphous SiO2.
Keywords: in-situ high pressure luminescent spectrum rhodamine B mesoporous molecular sieves
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