Perylene bisimide derivatives

Chemically Controlled Conductance of Perylene Bisimide Derivatives. 167... 

In another recent study on the synthesis of saniconductor polymers by a combination of CRP methods, Lang et al. [161] reported the use of H NMR and SEC to monitor the kinetics of NMP of trimethylsilyl propargyl acrylate and investigating side reactions leading to increase in polydis-persity. Subsequent click reactions with an azide functionalized perylene bisimide derivative overcome these limitations, as proven by H NMR and FTIR analysis. 

Debije, M.G., Chen, Z., Piiis, J., Neder, R.B., Watson, M.M., Mullen, K., Wurthner, R Dramatic increase in charge carrier lifetime in a liquid crystalline perylene bisimide derivative upon bay substitution with chlorine. J. Mater. Chem. 15, 1270-1276 (2005)... 

Perylene bisimide-dithienothiophene derivatives have been prepared (09JPC(A)5039). A femtosecond transient absorption study showed the presence of two positive bands at 490 nm (perylene cation radical) and at 730 nm (perylene anion radical). 

Dyes can also be incorporated into hydrogen-bonded superstructures using the complementarity of the hydrogen bond donors and acceptors. The addition of a perylene bisimide dye to chiral dialkyl melamine derivatives leads to aggregates (Fig. 26) which show induced circular dichroism in the dye part of the assembly in methylcyclohexane as well as the formation of mesoscopic fibres when the solvent is evaporated [227]. The melamine compounds... 

Much effort has been devoted to applying electron transfer in H-bonding system for the construction of optoelectronic devices and organic solar cells. For example, fullerene derivative and perylene bisimide have been assembled to form a El-bonded supramolecular system 28 through triple amino-carboxyhc acid interaction [86]. Under 63.2 mW/cm white light irradiation, the film made from the assembly on indium tin oxide (ITO) electrodes generated a steady and rapid photocurrent. The response of on/oflf cycling was prompt and reproducible. 

The orthogonal formation of self-assembled polymers is a convenient way to prepare nanosized p- and n-type fibers that coexist in a single system while starting from a mixed solution of electron donor and acceptor building blocks, respectively. An elegant example reported by Mullen et al. shows the ability to prepare a doublelayered heterojunction by processing a chloroform solution of a hexaphenyl-substituted hexabenzocoronene (HBC) and a perylene bisimide (FBI) derivative. The phase separation between the two systems is a direct consequence of... 

In this review, we restrict ourselves to metal-mediated assemblies of functional 7T-systems, which absorb light in the visible region (i.e. A. > 400 nm). Thus, materials whose color arises from metal ions or metal-ligand charge transfer (MLCT) are not included here. Self-assembhes derived from free base porphyrins, metalloporphyrins and perylene bisimide dyes have shown promising applications in artificial LH systems. Therefore, some fundamental properties of a few representative chromophores, namely meso-tetraphenylporphyrin (TPP), zinc tetraphenylporphyrin (ZnTPP), tetra-phenoxy-substituted perylene bisimide (PPBI) and bay area imsubstituted perylene bisimide (PBI), are briefly summarized herein. These properties are essential for the understanding of the photophysical and photochemical behavior of assemblies derived from such dyes. 

Fig.12 Hydrogen-bond interactions between perylene bisimide 16 and diaqdaminopyri-dine derivatives 15 and 17...

Interestingly perylene bisimides and a hydrogen-bonded OPV (p-type) derivative can also orthogonally self-assemble into separate nano-sized p-and n-type stacks in methylcyclohexane. fii contrast, in toluene only molecu-larly dissolved species are present, fii films deposited from methylcyclohexane as well as from toluene photoinduced electron transfer takes place from... 

Abstract The concepts at the basis of transient absorption measurements were illustrated with particular reference to nanosecond kinetic spectrophotometry and femtosecond pump and probe methods. The main features of the typical experimental setups for both techniques were illustrated as regards optical parts, geometrical layout of components and light detection systems. Examples of application of transient absorption spectroscopy were illustrated for the elucidation of photoinduced processes in supramolecular systems like a fullerenepyrrolidine-oligophenyleneethynylene hybrid derivative, a drug-protein complex and a tri-chromophoric system consisting of two porphyrins and one perylene bisimide. 

Redox molecules are particularly interesting for an electrochemical approach, because they offer addressable (functional) energy states in an electrochemically accessible potential window, which can be tuned upon polarization between oxidized and reduced states. The difference in the junction conductance of the oxidized and the reduced forms of redox molecules may span several orders of magnitude. Examples of functional molecules used in these studies include porphyrins [31,153], viologens [33, 34,110,114,154,155], aniline and thiophene oligomers [113, 146, 156, 157], metal-organic terpyridine complexes [46, 158-163], carotenes [164], nitro derivatives of OPE (OPV) [165, 166], ferrocene [150, 167, 168], perylene tetracarboxylic bisimide [141, 169, 170], tetrathia-fulvalenes [155], fullerene derivatives [171], redox-active proteins [109, 172-174], and hydroxyquinones [175]. 

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