Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 6, 2016
Previous Article Next Article

Two photon absorption properties of four coordinated transition metal complexes of tetraarylazadipyrromethene compounds

Author affiliations

Abstract

New tetraarylazadipyrromethene metal complexes with four coordinate metals (cobalt(II), nickel(II), copper(II) and zinc(II)) and with three moieties (4-methylphenyl,4-methoxyphenyl and 1-naphthyl) were designed and synthesized targeting applications utilizing two photon absorption. The effects of metals with filled or unfilled d orbitals and substituents with various electron donor properties on the charge transfer mechanism and two photon absorption properties of tetraarylazadipyrromethene compounds were investigated by ultrafast pump–probe spectroscopy and open aperture Z-scan experiments as well as density functional theory (DFT) calculations. Ultrafast transient absorption spectra provide evidence of an efficient photoinduced intramolecular charge transfer between the ligand and metals which is independent of filled or unfilled d orbitals of metals. Although zinc has filled d orbitals, its complexes possess an absorption maximum including a shoulder which is attributed to partial ligand to metal L(π) → M(d*) charge transfer character (LMCT). Due to the charge transfer mechanism, metal complexes of tetraarylazadipyrromethene compounds exhibited two photon absorption properties in the femtosecond regime at 800 nm wavelength. The greatest two photon absorption cross section value was measured as 2690 GM for Zn(L2)2 and 2374 GM for Co(L3)2 complexes.

Graphical abstract: Two photon absorption properties of four coordinated transition metal complexes of tetraarylazadipyrromethene compounds

Back to tab navigation

Supplementary files

Article information


Submitted
21 Oct 2015
Accepted
27 Dec 2015
First published
04 Jan 2016

Phys. Chem. Chem. Phys., 2016,18, 4451-4459
Article type
Paper
Author version available

Two photon absorption properties of four coordinated transition metal complexes of tetraarylazadipyrromethene compounds

E. Akhüseyin, O. Türkmen, B. Küçüköz, H. Yılmaz, A. Karatay, G. Sevinç, K. Xu, M. Hayvali and H. G. Yaglioglu, Phys. Chem. Chem. Phys., 2016, 18, 4451
DOI: 10.1039/C5CP06410D

Social activity

Search articles by author

Spotlight

Advertisements