Hole-Transporting Glass-Forming 3,3′-Dicarbazyl-Based Hydrazones

Abstract

3,3 0 -Di(9-(4-butylphenyl)carbazyl) and 3,3 0 -di(9-ethylcarbazyl)-based hydrazones were synthesized by the multi-step synthetic route including oxidative dimerization of 9-(4-butylphenyl)carbazole and 9-ethylcarbazole, formylation of the dimmers obtained and the reactions of the formyl derivatives with different hydrazines. The chemical structure of the compounds was confirmed by 1 HNMR, IR and mass spectroscopy. The hydrazones synthesized form stable glasses with the glass transition temperatures exceeding 140 C. The values of ionisation potentials measured by electron photoemission technique are in the range of 5,21-5,4 eV. The hole drift mobilities in the films of the 50% solid solutions of the hydrazones in Financial support from Samsung Electronics and from the Lithuanian State Science and Studies foundation is gratefully acknowledged. 95=[407]bisphenol Z polycarbonate established by the xerographic time-of-flight technique exceed 10 À5 cm 2 =Vs at high electric fields.

Monomers and polymers of indole-based enamines as amorphous electro-active materials

“…The data were found to be in good agreement with the proposed structures. The number average (M n ) and weight average (M w ) molecular weights of the products of polymerization (11)(12)(13) were estimated by GPC using polystyrene standards. The GPC results (Table 1) indicate that the cationic ring-opening polymerizations yield polymers of rather low molecular weights with M w ranging from 4360 to 4560 and relatively broad molecular weight distribution.…”

“…The measurement method was, in principle, similar to that demonstrated by Miyamoto et al [12]. The samples for ionization potential measurements were prepared as described previously [13].…”

Phenothiazinyl- and 4-diethylaminophenyl-substituted diethylenes as fluorescent and hole-transporting molecular materials

“…The samples for ionization potential measurements were prepared as described previously [11]. The ionization potentials were measured by the electron photoemission in air method [12].…”

Fabrication and Study of the Organic-Inorganic Semiconductor Diodes Formed on n-Si

“…Three new low molecular mass organic compounds containing carbazole and triphenylamine structural units, namely: 9,9 -bis(4-butylphenyl)--3,3 -bicarbazolyl (BPBC), 4-(1H-perimidin-2-yl)--N ,N -diphenylbenzenamine (PER) and 9,9 -diethyl--3,3 -bicarbazolyl (EBC) have been synthesized and characterized recently by technology group from Kaunas * corresponding author; e-mail: veng@pfi.lt University of Technology [3]. The BPBC, EBC and PER films with thickness ranging from about 250 nm to 300 nm were thermally evaporated in vacuum (p ≈ 4 × 10 −6 Torr) onto phosphorus-doped non-heated Si wafers with polished (111) surface using resistively heated tantalum boats.…”