Hexacene: Synthesis, Properties and Future Perspectives

TAO-DFT fictitious temperature made simple

“…56,78,88,89 By contrast, 6-acene (i.e., hexacene) is too unstable to isolate, since it is very susceptible to light or air, and tends to dimerize even in dilute solutions. 66,74,79,82 One approach to stabilize 6-acene is to add some manipulating substitution groups, 87 while this would certainly alter the properties of 6acene. Also, it has been reported that 6-acene with relatively bulky substituents can still dimerize even in the dark.…”

High‐Resolution Electronic Excitation and Emission Spectra of Pentacene and 6,13‐Diazapentacene Monomers and Weakly Bound Dimers by Matrix‐Isolation Spectroscopy

“…[2][3][4][5] The smallers pecies of this class have been intensely studied. [6][7][8][9][10][11][12][13][14] Synthetic approaches, based on the photochemical bisdecarbonylation of bridging a-diketones, the thermald eoxygenation of endoxide precursors or the thermalc leavage of covalentd imers, have made longer acenes accessible, [15][16][17][18] up to the on-surface generation of dodecacene. [19] Particular focus has been devoted to the application of large polyaromatic hydrocarbons [5,20,21] and acenes,i np articular [22][23][24][25][26] in organic electronics.…”

Heptacene: Synthesis and Its Hole‐Transfer Property in Stable Thin Films

“…The most effective method of preparation is to heat up the corresponding precursors in the solid state. [50,54,61] As shown in Figure 1, heptacene can be generated through a thermal reaction from precursor 2 in the solid state. The synthesis of compound 2 is shown in Scheme 2.…”

“…For the synthesis of stable heptacene, the best method is to go through the monoketone precursor 2. [61] The key step for the preparation of 2 is to generate a carbonyl group at the seventh position of a norbornane moiety. In our previous study in the synthesis of pentacene, the carbonyl group was transformed from a double bond, which was converted to a diol by treatments with m-chloroperbenzoic acid (m-CPBA) and ptoluenesulfonic acid (p-TsOH) (Scheme 1).…”