Self-assembled Transition Metal Coordination Frameworks of ...

C0pper(II) complexes
The carbohydrazone derived Cu(II) complex 14 shows two different species
as evidenced by the unequal distribution and supported by good simulation. The
spectrum of 15 clearly indicates two different Cu(II) species as evidenced by eight
hyperfine lines at the parallel region. The absence of any half-field signals rules out
the possibility of any significant coupling between these electrons. The complex 17
also shows the presence of two almost similar uncoupled Cu(ll) centers supported by
the simulation and absence of any half field signals. The absence of any half field
signals and simulation leads to conclude the similar nature for EPR spectra of 18 and
19, with two independent Cu(H) species.
/\
/‘II
F
J
I
nu,
I L_. . ..l._i. I ._. . I . I I
263 2&3 ED Q0 343 363 363
Bo [mu
Fig. 4.30. Experimental (black) and simulated best fit (blue) of the EPR spectrum of
complex 15 in DMF at 77 K.
163