Tetrabenzo perylene

Mizuguchi, J. (1997). Structural and optical properties of 5,15-diaza-6,16-dihydroxy-tetrabenzo[b,e,k,n]perylene. Dyes and Pigments, 35, 347-60. [264]... 

Another indication that resonance might increase planarity is seen in Figure 3. Absorbance spectra for three similar PAHs are shown. The top spectrum is of tetrabenzo[a,cdj,Zra]perylene (compound 25), which results from the condensation of 7H-benz[cfe]anthracen-7-one with itself. The bottom spectrum is of dibenzo[j fc,wi)]dinaphtho-2,l,8,7-de/g 2, l, 8, 7 -opgr]pentacene (compound 33), which results from 6H-benzo[cfe]pyren-6-one condensation. The middle spectrum is of an isomer resulting from the condensation of 7H-benz[cfe]anthracen-7-one with 6H-benzo[de]pyren-6-one (compound 2). Although the three spectra are remarkably similar in band... 

Fig. 21.2 The UV absorbance spectra of the spectra are not only different from each other, two isomers tetrabenzo[a,cd,//m]perylene and but are very different from those of the two tetrabenzo[fl,cd,j,/m]perylene. Note that these similar structures shown in Fig. 21.1.

Fig. 11.9 Energy effects of the rings of perylene (8), benzo[a]peiylene (9), benzo [hjperylene (10), and tetrabenzo[hj k, ojpeiy lene (11). For the sake of simplicity, the e/-values are multiplied by 10,000...

Fig. 11.10 TransfOTming tetrabenzo[fc Lo]peiylene (11) into the third member (P3) of the perylene/bisanthrene homologous series. Here Pj = perylene, and P2 = bisanthiene. The benzenoid molecules P , n= 1,2,3,..., are the simplest representatives of the conjugated a electron system P, depicted in Fig. 11.7...

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