Metal pi Complexes of Carbazole Derivatives for Optoelectronics:Synthesis,Structures,and UV-Visible Absorption Spectra of (3-Amino-9-ethylcarbazole)chromium Tricarbonyl Complexes

摘要

Chromium tricarbonyl complexes eta~6-bonded to 3-amino-9-ethylcarbazole at either the NH_2-substituted aryl ring(1)or the unsubstituted aryl ring(2)have been synthesized and their UV-visible absorption spectra determined.In comparison to 2,1 causes a subtle blue shift in the metal-to-ligand charge-transfer band along with spectral shape changes due to electron transfer from the NH_2 substituent to the Cr(CO)_3 center.