Titanocene as a New Acceptor (A) for Arylamine Donors (D) in D-π-A Chromophores

Authors

Jared A. Pienkos
Danai Agakidou
Carl O. Trindle, University of Virginia - Main Campus
Wolfie Herwald
Zikri Altun, Marmara University Istanbul
Paul S. Wagenknecht, Furman UniversityFollow

ACS Citation

Pienkos, J. A.; Agakidou, D. A.; Trindle, C. O.; Herwald, D. W.; Altun, Z.; Wagenknecht, P. S. "Titanocene as a New Acceptor (A) for Arylamine Donors (D) in D-π-A Chromophores", Organometallics, 2016, 35, 2575-2578.

Version of Record

10.1021/acs.organomet.6b00518

Abstract

Charge transfer (CT) transitions are relevant in the fields of solar energy conversion and non-linear optical materials. Herein, a series of complexes with an alkynyl linkage between an aryl amine donor and a Ti^IV (titanocene) acceptoris reported. Each complex displays a strong (15,000 < ε < 24,000 M^-1cm^-1), low energy (520 < l < 560 nm) absorption ascribed to an amine to Ti^IV ligand-to-metal CT. This characterization is supported by UV-Vis spectroscopy, cyclic voltammetry, and TD-DFT calculations. These complexes are not photostable so an alternate architecture, wherein the amine donor is appended to the titanocene cyclopentadienyl ligand, has been designed. The molar absorptivity of the amine to Ti^IV CT in this latter architecture is lower (2100 M^-1cm^-1), indicating weaker donor-acceptor coupling. This architecture is indeed much more photostable.

Source Name

Organometallics

Publication Date

2016

Volume

35

Issue

16

Page(s)

2575-2578

Document Type

Citation

Citation Type

Article