Azobenzene based Zn(II)/Ru(II) coordination-organometallic hybrid complexes: Influence of pi-conjugation, donor/acceptor substituent's and coligands on electrochemical, luminescence and NLO properties

作者：Lolage S R; Pawal S B; Chavan S S^*

来源：Optical Materials, 2017, 67: 162-171.

DOI：10.1016/j.optmat.2017.03.053

• Heterobimetallic complexes
• Photoluminescence
• Cyclic voltammetry
• Optical properties

A new series of azobenzene based heterobinuclear coordination-organometallic hybrid complexes of the type [Zn(Phen)(R-C6H4HC=N(O)C6H3N=NC6H4C equivalent to CRu(dppe)(2)Cl]X (1a-6a) and [Zn(bipy)(R-C6H4HC=N(O)C6H3N=NC6H4C equivalent to CRu(dppe)(2)Cl)]X (1b-6b) have been prepared and characterized (where R=C equivalent to CC6H4OCH3, C equivalent to CC6H4NO2; X=ClO4, BF4, PF6; phen= 1,10-phenanth-roline, bipy=2,2'-bipyridine). TGA was carried out to study the thermal behaviour of the complexes. X-ray powder diffraction and SEM studies of the representative complexes 2a and 5b are used to clarify the crystal structure and morphology of the complexes. Cyclic voltammetry study indicate a quasireversible redox behaviour corresponding to Ru(II)/Ru(III) couple susceptible to variation of electron donating/accepting properties of substituent group in the complexes. Room temperature luminescence is observed for all complexes corresponding to pi -> pi*ILCT transition indicating that the emission wavelength is finely tuned by increasing pi-conjugation and variation of substituent groups with different electronic effects in the complexes. The second harmonic generation (SHG) efficiency of the complexes was measured by Kurtz-powder technique indicating that all complexes display the second harmonic generation (SHG) property.

• 出版日期2017-5