1,721,059 research outputs found
New thiophene-based low band gap polymeric materials for bulk-heterojunction solar cells
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Synthesis and chiroptical properties of optically active photochromic polymers with side-chain L-lactic residues connected to trans-azobenzene moieties bearing a formyl electron-withdrawing group
No full textPolymeric photoinitiators having benzoin methylether moieties connected to the main chain through the benzyl aromatic ring and their activity for ultraviolet-curable coatings
No full textAlcohol-soluble cationic polythiophenes: inside the role of cathode interlayers for halogen-free OSCs
No full textRegioregular optically active polythiophenes bearing 3-alkylsulphanyl- and 3-alkoxy- side chains
No full textA comparative study of isomeric polydialkylterthiophenes with regular regiochemistry of substitution. Electrochemical synthesis
No full textIn this paper is presented the study of electrodeposited polyterthiophenes with regular regiochemistry of substitution. The starting monomers were 3',4' and 3,3"-didodecyl 2,2':5',2" terthiophene. The presence of long alkylic chains improved the easiness of processability on the resulting polymers. Moreover, the symmetric structure of the monomers allowed a regular regiochemistry of substitution in the resulting polymers. Poly-didodecyl terthiophenes were electrochemically prepared from a mixture of acetonitrile and benzonitrile and then characterized with infrared spectroscopy, mass spectrometry, profilometry and scanning electron microscopy. Formal oxidation potential E-o and dimerization rate constants were determined for both monomers by means of ultrafast cyclic voltammetry (scan rate >5000 V s(-1)). The comparison of the results revealed the influence of substitution patterns in the determination of the polymerization degree and the kinetic of polymer growth during the electrochemical polymerization. The role of the monomers reactivities was then pointed out in the electrochemical synthesis, (C) 2000 Elsevier Science Ltd. All rights reserved
Study of new water-soluble polythiophenes as photo-active layer in polymeric photovoltaic devices
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