Influence of the Chemical Structure on the Stability and Conductance of Porphyrin Single-Molecule Junctions
作者:Mickael L. Perrin、Ferry Prins、Christian A. Martin、Ahson J. Shaikh、Rienk Eelkema、Jan H. van Esch、Tomas Briza、Robert Kaplanek、Vladimir Kral、Jan M. van Ruitenbeek、Herre S. J. van der Zant、Diana Dulić
DOI:10.1002/anie.201104757
日期:2011.11.18
Different bridging geometries can explain the observation that porphyrin molecules with added thiol end groups and pyridine axial groups form more‐stable single‐molecule junctions with an increased spread in low‐bias conductance. The stability of these geometries is demonstrated by time‐dependent conductance measurements. In contrast, rodlike molecules show one preferential binding geometry.
<i>In situ</i> generation of acyloxyphosphoniums for mild and efficient synthesis of thioesters
作者:Te-Jung Chai、Xin-Shun Chiou、Nian-Xuan Lin、Yu-Tsen Kuo、Cheng-Kun Lin
DOI:10.1039/d3ob01318a
日期:——
premixing iodobenzene dicarboxylates and triphenylphosphine, resulting in efficient thioester synthesis (up to 100% yield). Stable solid iodobenzene dicarboxylates, achieved via carboxylate exchange, serve as hypervalent iodine precursors. The resulting acyloxyphosphoniums allow convenient one-pot thioester synthesis under mild conditions. Our method demonstrates facile acyloxyphosphonium production