307537-95-7Relevant academic research and scientific papers
Photoswitching tripodal single molecular tip for noncontact AFM measurements: Synthesis, immobilization, and reversible configurational change on gold surface
Takamatsu, Daiko,Fukui, Ken-Ichi,Aroua, Safwan,Yamakoshi, Yoko
supporting information; experimental part, p. 3655 - 3664 (2010/09/06)
Tripodal molecules consisting of a tetrasubstituted adamantane with three phenylacetylene legs and a reversibly photoswitching apex were designed as "single molecular tips" for both chemical and topographical characterization of the substrate surface. By covalent attachment onto gold-coated AFM tips through three S-Au bonds, these rigid tripodal molecules are expected to act as sharp, robust, and stationary molecular tips whose configuration can be reversibly changed upon irradiation with UV or visible light. In this report, the full account of the syntheses of two photoswitching tripodal molecular tips, their immobilization onto Au(111) surfaces, and the detection of photoinduced configurational change on Au(111) surface by SPM measurements are documented.
Synthesis of Well-Defined Tower-Shaped 1,3,5-Trisubstituted Adamantanes Incorporating a Macrocyclic Trilactam Ring System
Li, Quan,Jin, Changshu,Petukhov, Pavel A.,Rukavishnikov, Aleksey V.,Zaikova, Tatiana O.,Phadke, Avinash,LaMunyon, Donald H.,Lee, Melissa D.,Keana, John F. W.
, p. 1010 - 1019 (2007/10/03)
We describe the synthesis of two novel well-defined tower-shaped 1,3,5-trisubstituted adamantanes 30 and 33 that incorporate a macrocyclic trilactam ring system. Each nanoscale molecule has a broad tripodal base consisting of three identical sulfur-contai
Synthesis of "Porphyrin-Linker-Thiol" Molecules with Diverse Linkers for Studies of Molecular-Based Information Storage
Gryko, Daniel T.,Clausen, Christian,Roth, Kristian M.,Dontha, Narasaiah,Bocian, David F.,Kuhr, Werner G.,Lindsey, Jonathan S.
, p. 7345 - 7355 (2007/10/03)
The attachment of redox-active molecules such as porphyrins to an electroactive surface provides an attractive approach for electrically addressable molecular-based information storage. Porphyrins are readily attached to a gold surface via thiol linkers. The rate of electron transfer between the electroactive surface and the porphyrin is one of the key factors that dictates suitability for molecular-based memory storage. This rate depends on the type and length of the linker connecting the thiol unit to the porphyrin. We have developed different routes for the preparation of thiol-derivatized porphyrins with eight different linkers. Two sets of linkers explore the effects of linker length and conjugation, with one set comprising phenylethyne units and one set comprising alkyl units. One electron-deficient linker has four fluorine atoms attached directly to a thiophenyl unit. To facilitate the synthesis of the porphyrins, convenient routes have been developed to a wide range of aldehydes possessing a protected S-acetylthio group. An efficient synthesis of 1-(S-acetylthio)-4-iodobenzene also has been developed. A set of porphyrins, each bearing one S-acetyl-derivatized linker at one meso position and mesityl moieties at the three remaining meso positions, has been synthesized. Altogether seven new aldehydes, eight free base porphyrins and eight zinc porphyrins have been prepared. The zinc porphyrins bearing the different linkers all form self-assembled monolayers (SAMs) on gold via in situ cleavage of the S-acetyl protecting group. The SAM of each porphyrin is electrochemically robust and exhibits two reversible oxidation waves.
