267007-83-0Relevant articles and documents
Gating of Quantum Interference in Molecular Junctions by Heteroatom Substitution
Liu, Xunshan,Sangtarash, Sara,Reber, David,Zhang, Dan,Sadeghi, Hatef,Shi, Jia,Xiao, Zong-Yuan,Hong, Wenjing,Lambert, Colin J.,Liu, Shi-Xia
, p. 173 - 176 (2017)
To guide the choice of future synthetic targets for single-molecule electronics, qualitative design rules are needed, which describe the effect of modifying chemical structure. Here the effect of heteroatom substitution on destructive quantum interference (QI) in single-molecule junctions is, for the first time experimentally addressed by investigating the conductance change when a “parent” meta-phenylene ethylene-type oligomer (m-OPE) is modified to yield a “daughter” by inserting one nitrogen atom into the m-OPE core. We find that if the substituted nitrogen is in a meta position relative to both acetylene linkers, the daughter conductance remains as low as the parent. However, if the substituted nitrogen is in an ortho position relative to one acetylene linker and a para position relative to the other, destructive QI is alleviated and the daughter conductance is high. This behavior contrasts with that of a para-connected parent, whose conductance is unaffected by heteroatom substitution. These experimental findings are rationalized by transport calculations and also agree with recent “magic ratio rules”, which capture the role of connectivity in determining the electrical conductance of such parents and daughters.
Novel electron-deficient oligo(phenyleneethynylene) derivatives for molecular electronics
Kitouni, Rachid,Selvanathan, Pramila,Galangau, Olivier,Norel, Lucie,Ouarda, Brahmia,Rigaut, Stéphane
, p. 1052 - 1059 (2018/03/23)
This work reports synthesis and characterizations of two new electron-poor “oligo(phenyleneethynylene) (OPE) type” molecular wires for fundamental studies of electron transport in molecular junctions. These OPE derivatives display three aromatic rings fun
Synthetic protocols and building blocks for molecular electronics
Stuhr-Hansen, Nicolai,S?rensen, Jakob Kryger,Moth-Poulsen, Kasper,Christensen, J?rn Bolstad,Bj?rnholm, Thomas,Nielsen, Mogens Br?ndsted
, p. 12288 - 12295 (2007/10/03)
Simple and readily accessible aryl bromides are useful building blocks for thiol end-capped molecular wires. Thus, 4-bromophenyl tert-butyl sulfide and 1-bromo-4-(methoxymethyl)benzene serve as precursors for a variety of oligo(phenylenevinylene) and olig
Synthesis and preliminary testing of molecular wires and devices
Tour, James M.,Rawlett, Adam M.,Kozaki, Masatoshi,Yao, Yuxing,Jagessar, Raymond C.,Dirk, Shawn M.,Price, David W.,Reed, Mark A.,Zhou, Chong-Wu,Chen, Jia,Wang, Wenyong,Campbell, Ian
, p. 5118 - 5134 (2007/10/03)
Presented here are several convergent synthetic routes to conjugated oligo(phenylene ethynylene)s. Some of these oligomers are free of functional groups, while others possess donor groups, acceptor groups, porphyrin interiors, and other heterocyclic interiors for various potential transmission and digital device applications. The syntheses of oligo(phenylene ethynylene)s with a variety of end groups for attachment to numerous metal probes and surfaces are presented. Some of the functionalized molecular systems showed linear, wire-like, current versus voltage (I(V)) responses, while others exhibited nonlinear I(V) curves for negative differential resistance (NDR) and molecular random access memory effects. Finally, the syntheses of functionalized oligomers are described that can form self-assembled monolayers on metallic electrodes that reduce the Schottky barriers. Information from the Schottky barrier studies can provide useful insight into molecular alligator clip optimizations for molecuar electronics.
