Thermo- and Photo-modulation of Exciplex Fluorescence in a 3D Spin Crossover Hofmann-type Coordination Polymer

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2018 Dec 14

PMID 30542594

Citations 8

Authors

Teresa Delgado

Manuel Meneses-Sanchez

Lucia Pineiro-Lopez

Carlos Bartual-Murgui

M Carmen Munoz

Jose Antonio Real

Affiliations

Soon will be listed here.

Abstract

The search for bifunctional materials showing synergies between spin crossover (SCO) and luminescence has attracted substantial interest since they could be promising platforms for new switching electronic and optical technologies. In this context, we present the first three-dimensional Fe Hofmann-type coordination polymer exhibiting SCO properties and luminescence. The complex {Fe(bpben)[Au(CN)]}@pyr (bpben = 1,4-bis(4-pyridyl)benzene) functionalized with pyrene (pyr) guests undergoes a cooperative multi-step SCO, which has been investigated by single crystal X-ray diffraction, single crystal UV-Vis absorption spectroscopy, and magnetic and calorimetric measurements. The resulting fluorescence from pyrene and exciplex emissions are controlled by the thermal and light irradiation (LIESST effect) dependence of the high/low-spin state population of Fe. Conversely, the SCO can be tracked by monitoring the fluorescence emission. This ON-OFF interplay between SCO and luminescence combined with the amenability of Hofmann-type materials to be processed at the nano-scale may be relevant for the generation of SCO-based sensors, actuators and spintronic devices.

Citing Articles

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