16 / 26
Page 70
Notes:
Research & Reviews: Journal of Material Sciences | ISSN: 2321-6212 | Volulme 6
November 07-08, 2018 | Atlanta, USA
Materials Science and Engineering
15
th
International Conference and Exhibition on
Applied Crystallography
3
rd
International Conference on
&
Self-assembly of organic chromophore nanostructures
Jonathan P Hill
National Institute for Materials Science, Japan
T
he supramolecular arrangement of porphyrins and other organic 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 two 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.
jonathan.hill@nims.go.jpRes. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C8-036