Electrochemical and spectroscopic properties of new functionalized polythiophenes electroformed from the oxidation of dithienyls linked by long chain polyether spacers

Synthesis and polymerization of 2- and 3-substituted thiophene derivatives linked by polyether bridges

“…The monomers in Scheme 2 were synthesized according to a general procedure described in the literature [11]. About 20 mmol of (2-thienyl) methanol (or (3-thienyl) methanol) and excess NaH were mixed in 200 ml of dry THF under an Ar atmosphere for 30 min at room temperature.…”

“…The latter two are of special interest because of their importance in the field of ionophoric resins. In this respect, recently two electropolymerizable groups linked by a flexible polyether chain at their a-and b-positions were synthesized (Scheme 1) [9][10][11][12][13].…”

“…For example, symmetrical monomers 1 possessing two thiophene (Th) units linked together by a polyether subunit have been synthesized and the electrochemical behavior has been investigated [11]. Due to the higher cost of 3-substituted Th derivatives, Simonet and coworkers [12] have recently synthesized new Th derivatives 2 substituted in the 2-position by acyclic polyether chains.…”

Electrochemical copolymerization of 2-substituted thiophene derivative linked by polyether bridge with thiophene

“…For example, PThs functionalized with 12-crown-4 and crown-5 found to exhibit ionochromic changes in alkali metal ion solutions [1] and polybithiophenes having crown ether moieties as substituents found to exhibit ion sensing properties [2]. In recent years, PThs were incorporated involving two electropolymerizable groups linked by a flexible polyether chain at their a-and b-positions [3][4][5][6][7][8][9]. Symmetrical monomers possessing two Th units linked together by a polyether subunit have been synthesized and their electrochemical behaviors have been investigated [5][6][7][8][9].…”

“…In recent years, PThs were incorporated involving two electropolymerizable groups linked by a flexible polyether chain at their a-and b-positions [3][4][5][6][7][8][9]. Symmetrical monomers possessing two Th units linked together by a polyether subunit have been synthesized and their electrochemical behaviors have been investigated [5][6][7][8][9]. Simonet and co-workers [6] have recently synthesized new Th derivatives substituted in the a position by acyclic polyether chains and reported the elimination of polyether chains during the electrochemical polymerization.…”