Photoluminescence of bis(8-hydroxyquinoline) zinc (Znq2) and magnesium (Mgq2)
Photoluminescence of bis(8-hydroxyquinoline) zinc (Znq2) and magnesium (Mgq2)
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DOI：
10.2478/s11534-011-0090-8
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发表时间：
2012-04
影响因子：
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通讯作者：
T. Tsuboi;Y. Nakai;Yasuko Torii
中科院分区：
文献类型：
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作者：
T. Tsuboi;Y. Nakai;Yasuko Torii
研究了溶液和粉末中双（8-羟基喹啉）锌 (Znq2) 和镁 (Mgq2) 的吸收和光致发光 (PL) 光谱、PL 量子效率和 PL 寿命。 Znq2和Mgq2在乙腈溶液中分别在376和396 nm处具有最低能量吸收带，在555和480 nm处具有峰值发射带。 Znq2 和 Mgq2 在溶液中的 PL 量子效率分别为 0.03 和 0.45，而在粉末中分别为 0.45 和 0.36。与粉末的情况不同，在溶液中可以获得两个 PL 寿命。较长的寿命归因于分子与其邻近分子的相互作用，而较短的寿命归因于孤立的单个分子。
Absorption and photoluminescence (PL) spectra, PL quantum efficiency, and PL lifetime have been investigated on bis(8-hydroxyquinoline) zinc (Znq2) and magnesium (Mgq2) in solutions and powder. Znq2 and Mgq2 have the lowest-energy absorption band at 376 and 396 nm in acetonitrile solution, respectively, and emission band with peak at 555 and 480 nm. The PL quantum efficiency is 0.03 and 0.45 for Znq2 and Mgq2 in the solution, respectively, while 0.45 and 0.36 in powder. Unlike the case of powders, two PL lifetimes are obtained in solutions. The longer lifetime is attributed to molecule having interaction with its neighboring molecule, while the shorter one to the isolated single molecule.