Inorganic compounds fluorescence

MDHS 7 Lead and inorganic compounds of lead in air (X-ray fluorescence spectrometry)... 

Cadmium and inorganic compounds of cadmium in air (X-ray fluorescence spectroscopy) Chromium and inorganic compounds of chromium m air (atomic absorption spectrometry) Chromium and inorganic compounds of chromium m air (X-ray fluorescence spectroscopy) General methods for sampling and gravimetnc analysis of respirable and mhalable dust Carbon disulphide in air... 

Technique selection X-ray fluorescence spectroscopy and X-ray diffraction can be used to identify inorganic compounds and their crystal structure. 

For organic molecules, the lifetime of the singlet state ranges from tens of picoseconds to hundreds of nanoseconds, whereas the triplet lifetime is much longer (microseconds to seconds). However, such a difference cannot be used to make a distinction between fluorescence and phosphorescence because some inorganic compounds (for instance, uranyl ion) or organometallic compounds may have a long lifetime. 

Mn + ions (3d electronic configuration) are shown to produce a broad luminescence in more than 500 inorganic compounds, covering a wavelength range from about 490 nm to about 750 nm. Although this ion is not of relevance for laser applications, it is widely used in the phosphor screens of cathode ray tubes and in fluorescent lamps. 

A.B.P. Sinha, Fluorescence and laser action in rare earth chelates in C.N.R. Rao and J.R. Ferraro(ed.), Spectroscopy in Inorganic Compounds, Vol. II. New York Academic Press, 1971. 

Further solvent polarity scales based on UV/Vis absorption as well as fluorescence spectra have been proposed by Brooker et al. [77], Dahne et al. [78], de Mayo et al. [217], Dubois et al. [79], Mukerjee et al. [218] and Wrona et al. [219], Walter et al. [220], Walther [81] and Lees et al. [82], Zelinskii et al. [80], Winnik et al. [222], Kamlet and Taft [84, 84a, 224, 226]. Buncel et al. [333], and Catalan et al. [296, 334-337]. In addition to these scales, a great variety of further positively and negatively solvato-chromic dyes have been recommended as solvent polarity indicators. A review describes about 60 organic and inorganic compounds, the solvatochromism of which is sufficiently large for their potential application as empirical solvent polarity probes [293]. 

Many inorganic compounds of U (III, IV and VI) may exhibit luminescence. Analytical chemistry makes use of fluorescence of U02+ complexes with inorganic and organic ligands and of U(VI) crystallophosphors. 

The analysis of inorganic compounds can be carried out by using a variety of analytical techniques, including those based on atomic spectroscopy, X-ray fluorescence spectroscopy, mass spectrometry, electrochemical approaches and chromatography. However, for the purpose of this present section the techniques chosen to be highlighted are those based on atomic spectroscopy, including atomic absorption and atomic emission spectroscopies. Some brief description on the use of an inductively coupled plasma for inorganic mass spectrometry will also be covered. 

---