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[[Vol. 72]тАЬOn-Surface ShapeshiftersтАЭ Exhibit Oxidation-State-Dependent Conformational and Self-assembly Behaviors_ WPI-MANA.pdf](https://mdr.nims.go.jp/filesets/61b0d64a-0aa7-41e3-83a2-a8dff0dcd236/download)

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International Center for Materials Nanoarchitectonics (WPI-MANA)

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[[Research Highlights Vol.72] “On-Surface Shapeshifters” Exhibit Oxidation-State-Dependent Conformational and Self-assembly Behaviors](https://mdr.nims.go.jp/datasets/6e2d9e39-e87b-4616-8e37-41429783a144)

## Fulltext

2022/03/31 16:06 “On-Surface Shapeshifters” Exhibit Oxidation-State-Dependent Conformational and Self-assembly Behaviors| MANAhttps://www.nims.go.jp/mana/research/highlights/vol72.html 1/2Previous  Index  NextResearch Highlights[Vol. 72]“On-Surface Shapeshifters” Exhibit Oxidation-State-Dependent Conformationaland Self-assembly Behaviors16 Nov, 2021A team at MANA has found that substances known as pyrazinacenes exhibit on-surfaceoxidation-state-dependent conformational and self-assembly behaviors. This “shape-shifting” could result in a variety of applications.The team’s broad experimental and theoretical study revealed that pyrazinacenes containingdecaazapentacene are stable against oxidation but unstable against reduction.Pyrazinacenes represent an unusual class of redox-active chromophores, and represent anemerging class of highly nitrogenous heteroacenes with unique properties. They have excellentpotential for use based on their special supramolecular properties, including interactions inbiological systems. They lie at the core of molecular materials’ applications because of theirimportant optical and electronic features.The team determined that the already established structure-function relationships of molecularmaterials known from solution now need to be re-evaluated to predict and understand theinterface-specific chemical, electronic, optical and mechanical properties of any newly synthesizedmolecules.https://www.nims.go.jp/mana/research/highlights/vol71.htmlhttps://www.nims.go.jp/mana/research/highlights/index.htmlhttps://www.nims.go.jp/mana/research/highlights/vol73.html2022/03/31 16:06 “On-Surface Shapeshifters” Exhibit Oxidation-State-Dependent Conformational and Self-assembly Behaviors| MANAhttps://www.nims.go.jp/mana/research/highlights/vol72.html 2/2The research was completed by David Miklík (WPI-MANA) and S. Fatemeh Mousavi (Department ofPhysics, University of Basel, Switzerland) under the leadership of Thomas Jung (Laboratory ofMicro- and Nanotechnology, Paul Scherrer Institute, Switzerland) and Jonathan P. Hill (WPI-MANA).“We suggest the term 'on-surface shapeshifter’ to describe these compounds, based on theiroxidation-state-coupled on-surface molecular morphology variations,” the scientists said in theirpaper.The substances’ chemical complexity, they said, motivates further investigations comparing in-solution and interfacial reactivity, in particular toward tunable photo-redox compounds or thegeneration of synthetically inaccessible molecules.This research was carried out by David Miklík of the Functional Chromophores Group of WPI-MANAand S. Fatemeh Mousavi of the University of Basel, Switzerland, and their collaborators.Reference“Pyrazinacenes Exhibit On-Surface Oxidation-State-Dependent Conformational and Self-AssemblyBehaviours”David Miklík, S. Fatemeh Mousavi, Zuzana Burešová, Anna Middleton, Yoshitaka Matsushita, JanLabuta, Aisha Ahsan, Luiza Buimaga-Iarinca, Paul A. Karr, Filip Bureš, Gary J. Richards, Pavel Švec,Toshiyuki Mori, Katsuhiko Ariga, Yutaka Wakayama, Cristian Morari, Francis D’Souza, Thomas A.Jung and Jonathan P. HillJournal: Communications Chemistry 4, 29 (2021)DOI : 10.1038/s42004-021-00470-w（MANA E-BULLETIN）https://www.nims.go.jp/mana/ebulletin/AffiliationsInternational Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for MaterialsScience (NIMS), Namiki 1-1, Tsukuba, Ibaraki 305-0044, JapanContact informationInternational Center for Materials Nanoarchitectonics(WPI-MANA)National Institute for Materials Science1-1 Namiki, Tsukuba, Ibaraki 305-0044 JapanPhone: +81-29-860-4710E-mail: mana-pr[AT]ml.nims.go.jphttps://samurai.nims.go.jp/profiles/jonathan_hill?locale=enhttps://samurai.nims.go.jp/profiles/jonathan_hill?locale=enhttps://doi.org/10.1038/s42004-021-00470-whttps://www.nims.go.jp/mana/ebulletin/