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Luminescence quantum yield

JK Johannes Karges
SK Shi Kuang
FM Federica Maschietto
OB Olivier Blacque
IC Ilaria Ciofini
HC Hui Chao
GG Gilles Gasser
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The sample was prepared in an acetonitrile solution with an absorption of 0.1 at 355 nm. The sample was irradiated at 355 nm with a NT342B Nd-YAG pumped optical parametric oscillator (Ekspla). The emission was focused at right angle to the excitation pathway and directed to a Princeton Instruments Acton SP-2300i monochromator. The signal was detected with a XPI-Max 4 CCD camera (Princeton Instruments). The luminescence quantum yields were determined by comparison with the reference [Ru(2,2′-bipyridine)3]Cl2 in acetonitrile (Φem = 5.9%)58 applying the following formula:

Φem = luminescence quantum yield, F = fraction of light absorbed, I = integrated emission intensities, n = refractive index, A = absorbance of the sample at irradiation wavelength.

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