Dibenzothiophenes molecular structure

Fig. 4 Molecular structures of 1 - Polybrominated naphthalenes, PBNs, 2 -Tetrachlorobenzyltoluenes, TCBTs, 3 - Polybrominated diphenylethers, PBDEs, 4 - Polychlorinated terphenyls, PCTs, 5 - Polychlorinated triphenylmethanes, PCTPM, 6 - Polychlorinated dibenzothiophenes, PCDBT.

Figure 4,7 Molecular structure and temperature dependence of (a, b) FSF and (c, d) FASAF emission spectra in ethanol. Dual emission is observed with isoemissive points below 230 K for both compounds. Adapted with permission from Figure 6 of F. B. Dias, 5. Pollock, C. Hedley, L. O. Palsson, Andy Monkman, 1.1. Perepichka, I. F. Perepichka, M. Tavasli and M. R. Bryce, Intramolecular charge transfer assisted by conformational changes in the excited state of fluorene-dibenzothiophene-S,S-dioxide co-oligomers, J. Phys. Chem. B, 110, 19329 19339 (2006). Copyright 2006 American Chemical Society...

The only notable fragments derived from the very stable molecular ions of carbazole (64JA3729), dibenzofuran (64AJC975) and dibenzothiophene (68T3255) are at m/e 140 (CnH8) and 139 (C,H7) corresponding to loss of CX and HCX respectively structure (t) has been suggested. 

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