Abstract

Until recently, it was rather difficult to obtain a laser-excited Raman spectrum of a highly colored sample because of localized sample heating. However, the rotating sample (resonance Raman) technique developed by Kiefer and Bernstein overcomes this thermal problem and permits measurements on highly colored samples. The versatility of the resonance Raman technique has recently been demonstrated by Sloane and Cook, who studied a series of inorganic and organic materials. During a study of some highly colored coordination compounds, we have found that the rotating sample technique may be utilized in conjunction with semimicro samples to obtain well defined Raman spectra. Figs. 1 to 3, which illustrate this point, were obtained using a previously described Raman spectrometer and a rotating sample holder similar to that described earlier, with the exception that the circular channel in which the sample is placed has been reduced in width to 1 mm.

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