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From 3f, 3e, 3h and 3i whose emission wavelengths were
521, 523, 528 and 530 nm, it was found that they were redshifted.
We concluded that groups at 3- and 5-position with
electron-donating substituents such as methyl could lead to
a red-shifted phenomenon, with electron-withdrawing ones
could lead to a blue-shifted phenomenon. Meanwhile, when
we compared these novel bischromophore compounds with
other pyrazoline derivatives whose 1-position had phenyl,
a red-shifted phenomenon was found. So it was concluded
that the groups at both positions 1 and 3 had very strong influence
on the emission fluorescence of these compounds.

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