This
dissertation
research
work
focuses
on
the
investigation
of
novel
donor-acceptor
systems
elucidating
their
photochemical
properties,
anion
binding,
and
potential
application
in
development
artificial
photosynthetic
systems.
The
explored
are
based
oxoporphyrinogen
(OxPs),
porphyrins,
fullerene,
boron
dipyrromethene
(BODIPY)
properties
molecular
were
elucidated
using
UV-vis
spectroscopy,
fluorescence
electrochemical
methods,
computational
calculations,
ultrafast
transient
absorption
spectroscopy.
A
BODIPY-oxoporphyrinogen
dyad
which
is
able
to
bind
with
fluoride
promoting
excited
state
electron
energy
transfer
events
mimicking
primary
natural
photosynthesis
was
introduced.
Further,
self-assembly
supramolecular
complexes
oxoporphyrinogens,
different
zinc
porphyrin
dimers
explored.
formed
self-assembled
have
shown
photoinduced
transfer.
push-pull
construct
spiro-locked
N-heterocycle-fused
studied.
charge
separation
stabilization
this
system
enhanced
by
complexation
anion.
Also,
effect
BODIPY
functionalization
linkers
a
series
carbazole–BODIPY
phenothiazine-BODIPY
dyads
investigated.
These
findings
important
develop
advanced
efficient
BODIPY-based
for
light
harvesting
applications.
entire
study
aims
expand
our
understanding
these
contribute
towards
advancement
sustainable
technologies.
Inorganic Chemistry,
Journal Year:
2024,
Volume and Issue:
63(27), P. 12506 - 12515
Published: June 24, 2024
Two
new
vanadyl
complexes
of
N-confused
porphyrins
(NCPs),
[VONCTPP]
(V-1)
and
[VONCP(OMe)8]
(V-2),
have
been
synthesized
for
the
first
time
investigated
as
a
catalyst
oxidative
bromination
reaction
phenol
its
derivatives.
This
article
further
delineates
crystal
structures,
photophysical,
redox
properties
both
complexes.
Complexes
V-1
V-2
exhibited
significant
red
shift
in
their
absorption
spectra
compared
with
respective
free
bases.
The
single-crystal
structure
revealed
that
complex
is
2H
tautomeric
form,
while
EPR
studies
+4
oxidation
state
vanadium
metal
having
an
axial
compression
dxy1
configuration.
Catalytic
potential
bromoperoxidases-like
activity
has
explored
NCP
chemistry
excellent
TOF
values
(4.7–6.3
s–1
7.3–8.7
V-2)
using
KBr
source
bromine
H2O2
green
oxidant
aqueous
acidic
medium
at
298
K.
Notably,
catalysts
show
recyclability
over
five
cycles.
vanadyl-metalated
NCPs
exhibit
stability
air.
ACS Applied Materials & Interfaces,
Journal Year:
2024,
Volume and Issue:
16(13), P. 16996 - 17006
Published: March 21, 2024
The
present
work
demonstrates
the
ultrafast
carrier
dynamics
and
third-order
nonlinear
optical
properties
of
electrochemically
fabricated
free-standing
porous
silicon
(FS-PSi)-based
microcavities
via
femtosecond
transient
absorption
spectroscopy
(TAS)
single-beam
Z-scan
techniques,
respectively.
TAS
(pump:
400
nm,
probe:
430–780
∼70
fs,
1
kHz)
decay
are
dominated
by
photoinduced
(PIA,
lifetime
range:
4.7–156
ps)
as
well
bleaching
(PIB,
4.3–324
for
cavity
mode
(λc)
band
edges.
A
fascinating
switching
behavior
from
PIB
(−ve)
to
PIA
(+ve)
has
been
observed
in
mode,
which
shows
potential
applications.
nonlinearities
revealed
an
enhanced
two-photon
coefficient
(β)
order
10–10
mW–1
along
with
refractive
index
(n2)
range
10–17
m2
W–1.
Furthermore,
a
real-time
sensing
application
such
FS-PSi
demonstrated
detecting
organic
solvents
simultaneously
monitoring
kinetics
reflection
transmission
mode.
ChemistrySelect,
Journal Year:
2024,
Volume and Issue:
9(17)
Published: May 2, 2024
Abstract
New
materials
for
applications
in
energy
conversion
systems
as
solar
cells
or
lighting
devices,
avoiding
expensive
and
scarce
metals
is
desirable,
therefore,
aluminum
corroles
appear
alternative,
since
these
compounds
are
relatively
less
expensive,
the
electronic
modulation
appears
an
interesting
tuning
to
achieve
good
performance
optical
devices.
In
this
sense,
research
presents
a
theoretical
study
of
new
containing
electron‐withdrawing
substituents
on
meso‐carbons
macrocycle.
The
first
family
comprises
three
A
3
structures
(
AlCo1
,
AlCo2
AlCo3
)
that
contain
NO
2
‐phenyl
CF
substituents,
second
B
AlCo4
AlCo5
AlCo6
with
pyrenyl
substituent
10
meso‐carbon.
All
calculations
were
obtained
by
Density
Functional
Theory
using
B3LYP
functional
6‐31G(d,p)
basis
set
all
atoms
evaluating
their
geometrical
parameters,
absorption
properties
injection/transport
charge
transfer
processes.
results
show
have
strong
processes
extended
from
blue
near
infrared
region,
being
favored
shifted
red
para
substituents.
Furthermore,
calculated
showed
values
demonstrating
macrocyclic
could
be
useful
optoelectronic
such
Chemical Communications,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Jan. 1, 2024
The
recent
progress
regarding
the
synthesis
and
functionalization
of
formyl/acroleyl
substituted
corroles
their
reactivity
with
active
methylene
compounds
pyrroles
are
highlighted.
ChemPlusChem,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Oct. 23, 2024
5,15-bis(perfluorophenyl)-10-(4-carboxyphenyl)
corrole
and
its
Co(III),
Mn(III),
Cu(III)
complexes
were
synthesized.
The
electrocatalytic
hydrogen
evolution
reaction
(HER)
of
these
metal
was
investigated
using
different
proton
sources
(AcOH,
trifluoroacetic
acid,
TsOH)
in
an
organic
dimethylformamide
solvent.
HER
may
proceed
through
EECC,
EECEC,
or
EEECEC
pathways
(where
E
represents
electron
transfer
C
binding)
depending
on
the
acidity
concentration
source
used.
Co
complex
exhibits
remarkable
production
performance,
achieving
a
turnover
frequency
201
s
This
dissertation
research
work
focuses
on
the
investigation
of
novel
donor-acceptor
systems
elucidating
their
photochemical
properties,
anion
binding,
and
potential
application
in
development
artificial
photosynthetic
systems.
The
explored
are
based
oxoporphyrinogen
(OxPs),
porphyrins,
fullerene,
boron
dipyrromethene
(BODIPY)
properties
molecular
were
elucidated
using
UV-vis
spectroscopy,
fluorescence
electrochemical
methods,
computational
calculations,
ultrafast
transient
absorption
spectroscopy.
A
BODIPY-oxoporphyrinogen
dyad
which
is
able
to
bind
with
fluoride
promoting
excited
state
electron
energy
transfer
events
mimicking
primary
natural
photosynthesis
was
introduced.
Further,
self-assembly
supramolecular
complexes
oxoporphyrinogens,
different
zinc
porphyrin
dimers
explored.
formed
self-assembled
have
shown
photoinduced
transfer.
push-pull
construct
spiro-locked
N-heterocycle-fused
studied.
charge
separation
stabilization
this
system
enhanced
by
complexation
anion.
Also,
effect
BODIPY
functionalization
linkers
a
series
carbazole–BODIPY
phenothiazine-BODIPY
dyads
investigated.
These
findings
important
develop
advanced
efficient
BODIPY-based
for
light
harvesting
applications.
entire
study
aims
expand
our
understanding
these
contribute
towards
advancement
sustainable
technologies.
