177364-95-3Relevant articles and documents
Electrochemical and nonlinear optical studies of new D-A type π-conjugated polymers carrying 3,4-benzyloxythiophene, oxadiazole, and 3,4-alkoxythiophene systems
Sunitha,Adhikari, Airody Vasudeva,Vishnumurthy,Smijesh,Philip, Reji
supporting information; experimental part, p. 234 - 236 (2012/04/17)
We investigated the nonlinear optical (NLO) properties of two newly synthesized conjugated polymers Pl and P2 carrying 1,3,4-oxadiazole, 3,4-dibenzyloxythiophene, and 3,4-dialkoxythiophene moieties along the main chain, as potential NLO active materials. Their structures have been well characterized. The nonlinear measurements were performed by Z-scan using 532 nm, 7 ns laser pulses. Calculated values of figure of merit and β follow the criteria for good NLO materials. These results suggest that polymers are promising materials for applications in photonics.
Efficient route for the synthesis of 3,4-cycloalkoxy-2,5-diethoxycarbonyl-thiophenes obtained with bulky alkyl dibromides using trialkylamines as base-solvent
Frontana-Uribe, Bernardo A.,Heinze, Jürgen
, p. 4635 - 4640 (2007/10/03)
New reaction conditions were investigated for dialkylizing diethyl 3,4-dihydroxy-2,5-thiophenedicarboxylate with sterically hindered alkyl-dibromides, using as reaction system DMF-trialkylamine or only the trialkylamine as base-solvent. This methodology produced the corresponding 3,4-cycloalkoxy-2,5-diethoxycarbonyl-thiophene derivatives faster and with better yields than those reported previously for K2CO3-DMF. Experiments were performed with triethylamine, tripropylamine, and tributylamine. Tributylamine produced the best results in a general reaction with alkyl-bromides. Aromatic amines like N,N-dimethylaniline, N-methyldiphenylamine, and triphenylamine failed to react at all. Reactions using only the tributylamine as base-solvent demonstrated that DMF is not necessary as a solvent to obtain good yields.
