Oligo(p‐phenyleneethynylene) (OPE) Molecular Wires: Synthesis and Length Dependence of Photoinduced Charge Transfer in OPEs with Triarylamine and Diaryloxadiazole End Groups

Abstract

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A review of oligo(arylene ethynylene) derivatives in molecular junctions

“…Molecular junctions are not the only method by which charge transport along a molecular backbone can be investigated. 78 OAE derivatives also find use as bridging units between functional groups in donor-bridge-acceptor (D-B-A) systems, [79][80][81] mixed valence complexes 82,83 and biradical systems. 84 Such studies are outside the scope of this review.…”

Resonance-Enhanced Charge Delocalization in Carbazole–Oligoyne–Oxadiazole Conjugates

“…Many different molecular bridges have been used to link Ds and As. Typical bridges in DBA systems comprise oligo-phenylenevinylenes (oPVs), [18][19][20][21][22] oligophenyleneethynylenes (oPEs), [23][24][25][26][27][28][29] oligo-fluorenes (oFls), [30][31][32][33] oligo-vinylfluorenes, 34 ladder-OFls, 35 oligothiophenes, [36][37][38] oligo-vinylthiophenes, 39 oligo(ethynylene-10,20-porphyrindiyl-ethynylene)s, 40 oligo-phenylenes, [41][42][43][44][45] and others. 3,46 It is noteworthy that oligoynes [(C≡C) n ] have only been partially studied as bridge units in this context.…”

A bifurcated molecular pentad capable of sequential electronic energy transfer and intramolecular charge transfer

“…Instead, quenching of the excited-singlet state of ExBOD, in both molecules, is likely to arise from charge transfer from the terminal TPA group (Scheme 2). There is a modest thermodynamic driving force (DG = À0.15 eV) for this process in CH 2 Cl 2 solution and the interspersed DTC fragment might be expected to function as an effective conduit 28 for intramolecular charge transfer along the molecular axis. This is because the spacer unit is also redox active and could promote through-bond charge transfer by way of superexchange interactions.…”