IR
spectroscopic
studies
evidenced
that
Cu
+
ions
coordinating
basic
molecules
(ammonia,
water,
and
pyridine)
influenced
both
the
C
O
and
N
O
bond
order.
The
significant
downshift
of
the
stretching
frequency
of
the
N
O
and
C
O
bands
indicates
a
considerable
weakening
of
the
multiple
bonds.
The
effect
was
found
to
be
the
most
important
for
pyridine
as
the
molecule
of
the
strongest
electron
donation
properties.
keywords in English:
CuZSM-5, carbon monoxide, IR spectroscopy, nitrogen monoxide