We
report
a
rapid,
room-temperature
mechanochemical
synthesis
of
2-
and
3-dimensional
boroxine
covalent
organic
frameworks
(COFs),
enabled
by
using
trimethylboroxine
as
dehydrating
additive
to
overcome
the
hydrolytic
sensitivity
boroxine-based
COFs.
The
resulting
COFs
display
high
porosity
crystallinity,
with
COF-102
being
first
example
mechanochemically-prepared
3D
COF,
exhibiting
surface
area
exceeding
2,400
m2
g–1.
Mechanochemistry
>20-fold
reduction
in
solvent
use
~100-fold
reaction
time
compared
solvothermal
methods,
providing
target
quantitatively
no
additional
work-up
besides
vacuum
drying.
Real-time
Raman
spectroscopy
permitted
quantitative
kinetic
analysis
COF
mechanosynthesis,
while
transferring
design
Resonant
Acoustic
Mixing
(RAM)
multi-gram
amounts
RSC Mechanochemistry,
Journal Year:
2024,
Volume and Issue:
1(3), P. 289 - 295
Published: Jan. 1, 2024
Under
controlled
atmospheres
the
mechanochemical
synthesis
of
tolbutamide
is
catalysed
by
Cu(
ii
),
with
CuCl
acting
as
a
pre-catalyst,
activated
via
aerobic
oxidation
under
milling.
Use
aluminum
jars
results
in
mechanoinhibition
this
process.
Angewandte Chemie International Edition,
Journal Year:
2024,
Volume and Issue:
unknown
Published: May 27, 2024
This
paper
presents
a
novel
approach
for
the
selective
oxidation
of
alcohols
to
their
corresponding
aldehydes
through
direct
mechanocatalysis,
employing
gold-coated
milling
vessel
as
catalyst
and
air
agent.
By
adjusting
frequency,
media,
duration,
high
catalytic
efficiencies
selectivities
are
achieved.
Remarkably,
yields
up
99
%
obtained
specific
substrates,
with
turnover
number
(TON)
8200
frequency
(TOF)
0.77
s
