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Volume 9 Journalof Nanomedicine&Nanotechnology Asia Pacific Nano Congress 2018
August 10-11, 2018
August 10-11, 2018 Osaka, Japan
2nd World Congress on
Nanoscience and Nanotechnology
Self-assembly of porphyrin and heteroacene organic nanostructures
Jonathan P Hill
National Institute for Materials Science, Japan
S upramolecular arrangement of porphyrins and other molecules has
great potential in the fields of molecular information storage and
sensing due to their ease of deposition and good chemical and thermal
stabilities. In particular, porphyrins of relatively large molecular weights
can be applied in thermal deposition while tetrapyrrole molecules have
had an extensive synthetic chemistry developed which enables synthesis
of complex derivatives. In this work, we present complementary examples
of porphyrin nanoarchitectonics. Starting from simple symmetrical
phenol derivatives, we describe the effects of steric hindrance about
the respective hydroxyl groups and also the effects of conformational
variation on the self-assembly structures. We also investigated fabrication
of binary molecular monolayers using two different porphyrin molecules Tetrakis (3, 5-di-t-butyl-4-hydroxyphenyl) porphyrin
and Tetrakis (4-pyridyl) porphyrin by deposition in ultrahigh vacuum. This leads to 2 unusual heteromolecular monolayer
structures were observed with one exhibiting good separation of molecules within the monolayer. Meanwhile, a synthetic
nanoarchitectonic approach was used to prepare self-assembled molecular nanowires at a mica substrate. The nanowires could
be observed growing using Atomic Force Microscopy (AFM) and the network structures of the nanowires can be influenced
by manipulation using the AFM probe tip. Formation of molecular monolayers with chromophores positioned remote from
the substrate surface will also be discussed. Additionally, the synthesis and self-assembly at surfaces of novel heteroacenes will
be described and the potential importance of these materials in several applications will be discussed.
Recent Publications
1. Webre W A, Gobeze H B, Shao S, Karr P A, Ariga K, Hill J P, D’Souza F (2018) Fluoride-ion-binding promoted photo-
induced charge separation in a self-assembled C60 alkylcation bound bis-crown ether-oxoporphyrinogen supramolecule.
Chemical Communications. DOI: 10.1039/C7CC09524D.
2. Kong H, Yang S, Gao H, Timmer A, Hill J P, Díaz Arado O, Mönig H, Huang X, Tang Q, Ji Q, Liu W, Fuchs H (2017)
Substrate-mediated C-C and C-H coupling after dehalogenation. Journal of American Chemical Society; 139: 3669-3675.
Biography
Jonathan P Hill is Chief Scientist at the Supermolecules Group, National Institute for Materials Science, Japan. His main research interests are the synthesis and
assembly of organic molecular and nanostructures for potential applications in molecular electronics, sensing and related fields. He is co-author of more than 350
published papers and 20 patents on these subjects. He is also an author of more than 300 invited and contributed presentations at international conferences and
university seminars.
Jonathan P Hill, J Nanomed Nanotechnol 2018, Volume 9
DOI: 10.4172/2157-7439-C6-082
Figure-1: Self-assembled nanostructured
aggregates of porphyrins, fullerenes and
other chromophores.