Chemical Engineering August 2016 - 8

A new, economical way to synthesize
'two-faced' organosilicons
P
rofessor Masafumi Unno
and colleagues at Gunma
University (Kiryu City,
Japan; element.chem-bio.
st.gunma-u.ac.jp) have developed
a simple method for the synthesis
of " Janus cubes, " which are nanosized
organosilicons with two
different substituents (diagram).
These nanoparticles - named
after the two-faced Roman god
- are useful raw materials with a
unique structure used in the creation
of high-performance silicon
and silicone materials, but an economical
process for making them
has eluded researchers until now.
The Gunma chemists
synthesized
and characterized a " perfect "
Janus cube, octasilsesquioxane,
which is an organosilane containing
fluorine. It was made by a novel
siloxane bond-forming reaction involving
coupling a silanol salt and
fluorosilane: the cross-coupling of
CMS-5178-Powerof7-Ad3-CE_FINAL.pdf
1
sodium cyclosiloxanolate
and cyclic
fluorosiloxane
" half-cubes. "
The reaction
is performed
under mild
conditions,
does not generate
any byproducts
and
is expected to
Various organic
functional groups A
Silicon
Oxygen
Carbon
Inorganic hard structure
like quartz
Organic functional
groups differing from A
1 nm
be applicable for making organicinorganic
hybrid materials, the researchers
say.
6/7/16 1:34 PM
The achievement is part of a project
that is being led by Kazuhiko
Satoh at the National Institute of
Advanced Industrial Science and
Technology (AIST; Tsukuba; www.
aist.go.jp) with support from the
New Energy and Industrial Technology
Development Organization
(NEDO, Kawasaki City, both Japan;
Gunma University
www.nedo.go.jp). Organosilicon
compounds are widely used in a
number of industry fields, such as
the manufacture of " green " automobile
tires, which have enhanced,
fuel-saving performance. The market
for such tires is projected to
be worth $10 billion by 2030, and
NEDO aims to contribute to Japan's
competitiveness through the
expanded exporting of Japanese
organosilicon components.
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AUGUST 2016

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Chemical Engineering August 2016

Table of Contents for the Digital Edition of Chemical Engineering August 2016

Contents
Chemical Engineering August 2016 - Cover1
Chemical Engineering August 2016 - Cover2
Chemical Engineering August 2016 - Contents
Chemical Engineering August 2016 - 2
Chemical Engineering August 2016 - 3
Chemical Engineering August 2016 - 4
Chemical Engineering August 2016 - 5
Chemical Engineering August 2016 - 6
Chemical Engineering August 2016 - 7
Chemical Engineering August 2016 - 8
Chemical Engineering August 2016 - 9
Chemical Engineering August 2016 - 10
Chemical Engineering August 2016 - 11
Chemical Engineering August 2016 - 12
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Chemical Engineering August 2016 - 18
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Chemical Engineering August 2016 - 20
Chemical Engineering August 2016 - 21
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Chemical Engineering August 2016 - 24
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Chemical Engineering August 2016 - 26
Chemical Engineering August 2016 - 27
Chemical Engineering August 2016 - 28
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Chemical Engineering August 2016 - 31
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Chemical Engineering August 2016 - 33
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Chemical Engineering August 2016 - 36
Chemical Engineering August 2016 - 37
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Chemical Engineering August 2016 - 84
Chemical Engineering August 2016 - Cover3
Chemical Engineering August 2016 - Cover4
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