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Controlled Growth of Porphyrin Wires at a Solid‐Liquid Interface
Author(s) -
Kahlfuss Christophe,
Kikkawa Yoshihiro,
Wytko Jennifer A.,
Weiss Jean
Publication year - 2019
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201900058
Subject(s) - porphyrin , alkyl , monomer , imidazole , molecule , mica , materials science , drop (telecommunication) , non covalent interactions , polymer chemistry , nanotechnology , crystallography , chemical engineering , chemistry , photochemistry , polymer , stereochemistry , organic chemistry , composite material , hydrogen bond , engineering , telecommunications , computer science
Bis(zinc porphyrin) scaffolds bearing C 8 or C 18 alkyl chains and imidazole end groups self‐assembled in a head‐to‐tail fashion into multi‐porphyrin assemblies on both HOPG and mica. Due to weaker molecule surface‐interactions, longer arrays formed on mica than on HOPG. In both cases, it was essential first to generate monomers that were drop casted on the surface, then to allow time for the bis(zinc porphyrins) to assemble. Although thicker fibrous assemblies were observed with the C 8 alkyl substituents than with the longer chains, noncovalent assemblies up to 1 μm long were observed for each molecule. These investigations provide a reproducible, noncovalent method to grow porphyrin arrays that may be of interest in molecular electronics for charge transport.