Thus could be resulted from the complexation by which increases the electron density of the metal ion through partial sharing of its positive charge with donor groups.
主要原因可能是形成配合物后电子由配体流向配位的中心阳离子，增加了电子的转移能力。
2
The results indicated that (1) azobenzene derivatives possess good conjugation. When linked with electron-donor and electron-acceptor, the charge transfer is obvious, thus shows strong polarity.