Highly Strained Nanoscale Bicyclophane Monolayers Entering the Third Dimension: A Combined Synthetic and Scanning Tunneling Microscopy Investigation
نویسندگان
چکیده
Tetrabromo aromatics can be synthesized by the Fischer-Zimmermann condensation of appropriate pyrylium salts with arylene dicarboxylic acid salts. Their cyclization intramolecular Yamamoto coupling yields strained bicyclophanes adjustable sizes and different intraannular bridges. All compounds adsorb at solid/liquid interface on highly oriented pyrolytic graphite (HOPG) are investigated scanning tunneling microscopy (STM) submolecular resolution. The observed two-dimensional (2D) supramolecular nanopatterns depend only alkoxy periphery cyclophanes independent specific structures Since central moieties smaller species perpendicular to planes bicyclophanes, their substituents protrude from surface up 1.6 nm after adsorption. Therefore, these molecules attractive platforms for addressing volume phase above surface.
منابع مشابه
Scanning tunneling microscopy investigation of the TiO2 anatase „101... surface
We report the first scanning tunneling microscopy ~STM! study of single-crystalline anatase. Atomically resolved images of the ~101! surface are consistent with a bulk-truncated (131) termination. Step edges run predominantly in the @010#, @ 1̄11# , and @ 1̄ 1̄1# directions. The surface is stable with very few point defects. Fourfold-coordinated Ti atoms at step edges are preferred adsorption site...
متن کاملScanning Tunneling Microscopy
The invention of the scanning tunneling microscope was a singularity event in the field of surface science and condensed matter physics. The ability to visualize individual atoms in an atomic structure was a huge step forward in experimental development, one for which the inventors were awarded the Nobel Prize in Physics in 1986. While a groundbreaking development, the Scanning Tunneling Micros...
متن کاملScanning tunneling microscopy
This paper begins with a brief introduction the development of scanning tunneling microscopy (STM); in the second part, we will present some basic theory about STM, we will pay more attention on the theory for tunneling between the surfaces of the sample with the model probe tip. Next, we introduce the STM facility, include different modes of operation and other influence factors. In addition, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Collection of Czechoslovak Chemical Communications
سال: 2021
ISSN: ['2192-6506']
DOI: https://doi.org/10.1002/cplu.202100099