Romani A, Clementi C, Miliani C, Brunetti B G, Sgamellotti A, Favaro G
Dipartimento di Chimica, Università di Perugia, via Elce di Sotto 8, 06123 Perugia, Italia.
Appl Spectrosc. 2008 Dec;62(12):1395-9. doi: 10.1366/000370208786822250.
The prototype of a portable instrument, based on the time-correlated single-photon counting method, purposely assembled for in situ measurements of luminescence lifetimes on artwork surfaces, is here presented. Preliminary tests have been carried out using the portable instrument and the results have been compared with those obtained using a bench instrument. In this way we have proven that the prototype provides lifetime measurements with good precision. It is also shown that fluorescence lifetime determinations, coupled with steady-state fluorescence spectra, allow the distinguishing, on laboratory samples, of different red organic lakes having similar fluorescence spectra, achieving new boundaries in the nondestructive diagnosis of artwork materials. The first in situ application of the technique on an original work of art, The Book of Kells, held at Trinity College Library, Dublin, highlighted the diagnostic potential of coupled steady-state and time-resolved luminescence spectroscopy in the identification of organic colorants.
本文介绍了一种便携式仪器的原型，该仪器基于时间相关单光子计数方法专门组装而成，用于原位测量艺术品表面的发光寿命。已使用该便携式仪器进行了初步测试，并将结果与使用台式仪器获得的结果进行了比较。通过这种方式，我们证明了该原型能够提供精度良好的寿命测量结果。研究还表明，荧光寿命测定与稳态荧光光谱相结合，可以在实验室样品中区分具有相似荧光光谱的不同红色有机色淀，为艺术品材料的无损诊断开辟了新领域。该技术首次在都柏林三一学院图书馆收藏的原创艺术品《凯尔斯书》上进行原位应用，突出了稳态和时间分辨发光光谱联用在识别有机着色剂方面的诊断潜力。
