185413-64-3Relevant academic research and scientific papers
Molecular ordering in bis(phenylenyl)bithiophenes
Stokes, Melissa A.,Kortan, Refik,Amy, Sandrine Rivillon,Katz, Howard E.,Chabal, Yves J.,Kloc, Christian,Siegrist, Theo
, p. 3427 - 3432 (2008/09/21)
The crystal structure of phenylene-bithiophene oligomers (PTTP) has been investigated by powder X-ray diffraction measurements and ab initio Monte Carlo modelling. Two new hydroxyl-terminated PTTP powders, 5,5′-bis-4-(6- hydroxyhexyloxy)-phenyl-2,2′-bithi
REACTIVE MESOGENIC CHARGE TRANSPORT COMPOUNDS
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Page/Page column 28-29, (2010/02/13)
The invention relates to new reactive mesogenic compounds with charge transport properties comprising at least two thiophene groups, their use as semiconductors or charge transport materials, in optical, electro-optical or electronic devices like for example liquid crystal displays, optical films, organic field effect transistors (FET or OFET) for thin film transistor liquid crystal displays and integrated circuit devices such as RFID tags, electroluminescent devices in flat panel displays, and in photovoltaic and sensor devices, and to a field effect transistor, light emitting device or ID tag comprising the reactive mesogenic charge transport compounds.
Some new dipyridyl and diphenol bridging ligands containing oligothienyl spacers, and their dinuclear molybdenum complexes: electrochemical, spectroscopic and luminescence properties
Hock, Joachim,Thompson, Alexander M. W. Cargill,McCleverty, Jon A.,Ward, Michael D.
, p. 4257 - 4264 (2007/10/03)
A series of new ligands has been prepared in which pyridyl (L1-L5) or phenol (H2L7) end-groups are linked by oligothienyl chains: 2,5-bis(4-pyridyl)thiophene (L1); 5,5'-bis(4-pyridyl)-2,2'-bithiophene (L2); 5,5''-bis(4-pyridyl)-2,2':5',2''-terthiophene (L3); 5,5'''-bis(4-pyridyl)-2,2':5',2'':5'',2'''-quatertiophene (L4); 5,5'-bis-2,2'-bithiophene (L5) and 5,5'-bis(4-hydroxyphenyl)-2,2'-bitiophene (H2L7).The compounds L1-L5 undergo two one-electron reductions at potentials which converge as the compounds lengthen; H2L7 shows an irreversible oxidation ascribed to the formation of a quinone.They all have very strong ?-?* transitions in their electronic spectra and are all strongly luminescent.Attachment of (NO)Cl> termini (dmpz = 3,5-dimethylpyrazolyl) to these compounds gives paramagnetic (for L1-L5) or diamagnetic (for L7) dinuclear complexes which show strong electrochemical interactions between the termini: the (formally) 17-electron/18-electron metal-based couples in the complex of L1, for example, are separated by 450 mV, which may be ascribed to a substantial degree of delocalisation of the added electrons onto the bridging ligands.The electrochemical interactions across the ligands are significantly stronger than across those of comparable length with polyene bridges, which confirms the more effective ability of the oligothienyl groups to transmit electronic interactions.The EPR spectra of the paramagnetic dinuclear complexes of L1-L5 reveal the presence of magnetic exchange interactions between the unpaired spins.The complexes are all weakly luminescent, due to residual ligand-based luminescence which is not entirely quenched by the metal centres.
