Chemistry - A European Journal,
Journal Year:
2024,
Volume and Issue:
30(61)
Published: Aug. 15, 2024
Abstract
Covalent
triazine
frameworks
(CTFs)
are
promising
heterogeneous
photocatalyst
candidates
owing
to
their
excellent
stability,
conjugacy,
and
tunability.
In
this
study,
a
series
of
CTFs
decorated
with
different
substituents
(H,
MeO,
F)
were
synthesised
utilised
as
photocatalysts
for
C−H
activation
reactions.
The
corresponding
optoelectronic
properties
could
be
precisely
regulated
by
the
electronic
effects
in
nanopore
channels
CTFs;
these
effective
organic
synthesis
due
unique
structures
properties.
Methoxy‐substituted
CTF
(MeO‐CTF)
exhibited
extraordinary
catalytic
performance
reusability
functionalization
constructing
an
donor‐acceptor
system,
achieving
highest
yield
photocatalytic
C3–H
hydroxylation
2‐phenylimidazole[1,2‐α]pyridine.
This
strategy
provides
new
scaffold
rational
design
efficient
synthesis.
European Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
27(27)
Published: May 21, 2024
Abstract
The
direct
functionalization
of
quinones
has
always
fascinated
research
communities
due
to
their
biological
and
redox
activities
subsequent
application.
Quinone
motifs
play
a
vital
role
as
precursors
for
many
bioactive
compounds
materials;
hence,
ingenious
methodologies
have
been
elaborated
exploring
these
units.
A
significant
part
the
synthetic
strategies
towards
functionalized
achieved
by
installing
substituents
on
hydroquinones,
phenols,
or
quinone
itself
different
oxidative
coupling
reactions
via
radical
pathways
with
without
utilization
metal
catalysts.
simple
C−H
bond
remains
challenging
inherited
electronic
nature
high
dissociation
energy.
This
review
article
summarizes
recent
advancement
made
through
quinones.
Our
primary
focus
will
be
approaches
mechanistic
that
appeared
in
last
two
decades,
along
short
historical
importance
family.
Journal of Materials Chemistry A,
Journal Year:
2024,
Volume and Issue:
12(29), P. 18512 - 18518
Published: Jan. 1, 2024
Ionization
of
covalent
organic
frameworks
(COFs)
can
lower
the
exciton
dissociation
energy,
thus
contributing
to
high
photocatalytic
performance
for
benzimidazole
synthesis.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 18, 2025
Abstract
High‐efficiency
production
of
triplet
states
in
covalent
organic
framework
photocatalysts
is
crucial
for
high‐selectivity
oxygen
(O
2
)
reduction
to
hydrogen
peroxide
(H
O
).
Herein,
fluorine
and
partial
atoms
are
incorporated
into
an
olefin‐linked
triazine
(F‐ol‐COF
HF‐ol‐COF),
which
the
adjacent
(F)
atoms‐olefinic
bond
forms
p‐π
conjugation
that
induces
spin‐polarization
under
irradiation,
thus
expediting
excitons
activating
singlet
(
1
contributing
a
high
H
selectivity
(91%).
Additionally,
feasibility
coupling
with
valorization
5‐hydroxymethylfurfural
(HMF)
exhibited.
The
F‐ol‐COF
demonstrates
highly
stable
yield
rate
12558
µmol
g
−1
h
HMF‐to‐functionalized
furan
conversion
95%,
much
higher
than
partially
fluorinated
COF
(HF‐ol‐COF)
non‐fluorinated
(H‐ol‐COF).
Mechanistic
studies
reveal
F‐incorporation
promotes
charge
separation,
intensifies
Lewis
acidity
carbon
on
olefinic
as
active
sites
adsorption,
provides
concentrated
holes
at
unit
HMF
oxidation
upgrading.
This
study
suggests
attractive
potential
rational
design
porous‐crystalline
high‐efficiency
photocatalytic
biomass
The Journal of Organic Chemistry,
Journal Year:
2024,
Volume and Issue:
89(11), P. 7521 - 7530
Published: May 16, 2024
This
study
reports
a
protocol
for
the
highly
regioselective
photocatalyzed
C–H
nitrosylation
of
imidazo[1,2-a]pyridine
scaffolds
at
C3
position
under
combination
visible-light
irradiation
and
continuous
flow
without
any
external
photocatalyst.
involves
mild
safe
conditions
shows
good
tolerance
to
air
water
along
with
excellent
functional
group
compatibility
site
selectivity,
generating
various
3-nitrosoimidazo[1,2-a]pyridines
in
yields
photocatalyst-,
oxidant-,
additive-free
conditions.Notably,
proposed
reaction,
which
introduces
chromophore
NO
into
scaffolds,
occurs
efficiently
additional
photocatalyst
owing
intense
light-absorption
characteristics
products.
could
guide
future
studies
on
development
green
organic-synthesis
strategies
wide
variety
potential
applications.
