Persistent bidirectional optical switching in the 2D high-spin polymer {[Fe(bbtr)3](BF4)2}∞

Pradip Chakraborty; Robert Bronisz; Céline Besnard; Laure Guénée; Phil Pattison; Andreas Hauser

doi:10.1021/ja211897t

Persistent bidirectional optical switching in the 2D high-spin polymer {[Fe(bbtr)3](BF4)2}∞

J Am Chem Soc. 2012 Mar 7;134(9):4049-52. doi: 10.1021/ja211897t. Epub 2012 Feb 22.

Authors

Pradip Chakraborty¹, Robert Bronisz, Céline Besnard, Laure Guénée, Phil Pattison, Andreas Hauser

Affiliation

¹ Département de Chimie Physique, Université de Genève, 30 Quai Ernest-Ansermet, CH-1211 Genève 4, Switzerland.

PMID: 22352712
DOI: 10.1021/ja211897t

Abstract

In the covalently linked 2D coordination network {[Fe(bbtr)(3)](BF(4))(2)}(∞), bbtr = 1,4-di(1,2,3-triazol-1-yl)butane, the iron(II) centers stay in the high-spin (HS) state down to 10 K. They can, however, be quantitatively converted to the low-spin (LS) state by irradiating into the near-IR spin allowed (5)dd band and back again by irradiating into the visible (1)dd band. The compound shows true light-induced bistability below 100 K, thus, having the potential for persistent bidirectional optical switching at elevated temperatures.