Band boron compounds

Very surprisingTy, no Raman bands at all were observed for the adsorbed boron compounds, in spite of the fact that the band position for some of these were known from IR studies (40,43). 

Table 4.8 Characteristic infrared bands of boron compounds. From Stuart, B., Modern Infrared Spectroscopy, ACOL Series, Wiley, Chichester, UK, 1996. University of Greenwich, and reproduced by permission of the University of Greenwich...

The band structure of p-BN as calculated by [1] is presented in Fig. 4-23. One of the major results is that the band gap which is found to be 8.8 eV (direct gap T-T) is 2 eV lower than obtained by LCAO methods [2] (see Boron Compounds 2nd Suppl. Vol. 2,1982, p. 326) and nearly 6 eV lower than the experimental data [3]. The band width data are almost identical with those given by [4], see below. 

Boron compounds generally have intense bands, as, for example, those due to the B-halogen, B-O, and B-N groups. The position and... 

Studies of fluorescence properties of the dye pair (i.e., boron difluoride complexes dye 9a-d and the nonsubstituted one lOa-d) in the BSA/SDS mixture revealed that coumarins 9b and 10c showed two excitation and emission bands, while other heterocycles showed single bands in the corresponding spectra. For all studied compounds, excitation and emission maxima occurred in the range 405-603 nm and 467-680 nm, respectively. 

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