89226-81-3Relevant academic research and scientific papers
New peripherally-substituted naphthalocyanines: Synthesis, characterisation and evaluation in dye-sensitised photoelectrochemical solar cells
Li, Xiyou,Long, Nicholas J.,Clifford, John N.,Campbell, Colin J.,Durrant, James R.
, p. 1076 - 1080 (2002)
A series of novel tetra-substituted naphthalocyanines featuring hydroxy and carboxylate substituents in peripheral positions have been synthesised in reasonable yields and characterised by spectroscopic techniques. The photochemical properties of the tetra-acid derivative 7 were examined following immobilisation on a nanocrystalline TiO2 surface and photoinduced dye cations were observed following optical excitation. 7 has a redox potential of 0.25 V (vs. Ag/AgCl), which is lower than is required for an efficient regeneration reaction and, therefore, results in limited photocurrent flow when 7 is used in photoelectrochemical solar cells.
Towards solution processable air stable p-type organic semiconductors: Synthesis and evaluation of mono and di-fluorinated pentacene derivatives
Wasikiewicz, Jaroslaw M.,Abu-Sen, Laila,Horn, Andrew B.,Koelewijn, Jacobus M.,Parry, Adam V. S.,Morrison, John J.,Yeates, Stephen G.
supporting information, p. 7309 - 7315 (2016/08/05)
The synthesis of a series of mono and di-fluorinated TIPS pentacene compounds for application as organic semiconductors is reported. Namely the novel 1-fluoro-6,13-bis[triisopropylsilyl-ethynyl]pentacene (1-fluoro-TIPS-pentacene), 2-fluoro-TIPS-pentacene and the recently reported 1:1 syn:anti isomeric mixtures of 1,(8:11)-difluoro-TIPS-pentacenes and 2,(9:10)-difluoro-TIPS-pentacenes. For the first time these materials have been subjected to a study of the relationship between molecular structure and thermal/photochemical stability. The changes in the pentacene HOMO via alteration of fluorine substitution is studied and related to environmental stability. As predicted, it was found that increasing the number of electron-withdrawing fluorine substituents increases stability to photodegradation. It was also observed that stability increases (and HOMO decreases) when fluorine is present on the 1- and 1,(8:11)-positions closer to the central rings rather than in the 2- and 2,(9:10)-positions. Comparative transistor measurements for the fluoro-derivatives demonstrated competitive device performance in comparison to underivatised TIPS-pentacene. Full characterisation and NMR assignment of these materials has been accomplished by comparison over the series for the first time.
Naphthoquinone anti-psoriatic agents
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, (2008/06/13)
Psoriasis in mammals is relieved by topically administering substituted naphthoquinone of the formula: STR1 wherein: R3 is halo, linear or branched alkoxy of one to eighteen carbon atoms or --S(O)n R wherein: n is 0, 1 or 2; and R is
Naphthaquinone anti-psoriatic agents
-
, (2008/06/13)
Psoriasis in mammals is relieved by topically administering substituted naphthaquinones of the formula: STR1 where R1 and R2 are the same or different and are hydrogen, hydroxy, alkoxy or acylamino and R3 is hydrogen, halo
