Bulletin of the American Physical Society
2024 APS March Meeting
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session Z39: Theory and Computation; Surfaces and Interfaces
11:30 AM–2:30 PM,
Friday, March 8, 2024
Room: 103E
Sponsoring
Unit:
DCP
Chair: Yuhua Duan, Natl Energy Technology Lab
Abstract: Z39.00010 : Harnessing Reduced-Symmetry Molecules to Guide Surface Assemblies into Covalent 2D Organic Materials*
1:18 PM–1:30 PM
Presenter:
Kun Zhu
(Rutgers University, New Brunswick)
Authors:
Sylvie Rangan
(Rutgers University, New Brunswick)
Kun Zhu
(Rutgers University, New Brunswick)
Yang Zhang
(Rutgers University, Newark)
Udbhav Kaushik
(Rutgers University, New Brunswick)
Elena Galoppini
(Rutgers University, Newark)
Robert A Bartynski
(Rutgers University, New Brunswick)
Here, we introduce a controlled pathway for these processes, achieved by the targeted functionalization of the pyrrole ring of Zinc Tetraphenylporphyrins. This results in a suite of molecules with consistent 2-fold symmetry. We show that selected functional groups and symmetry confinement of dehydrogenation and dehydrohalogenation reactions lead, under certain conditions to a uniform packing exhibiting long-range order, post on-surface intra-molecular reactions, as observed under STM. Comprehensive XPS/UPS characterizations elucidate the electronic structures of these molecular layers, and by-products of C–C bond formation are tracked using TPD.
*The authors acknowledge the National Science Foundationunder Award No. CHE-1904648 (R.A.B. and S.R.) and CHE-1904654 (E.G.) for funding this study.
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