Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/118837
Title: | Molecules Designed to Contain Two Weakly Coupled Spins with a Photoswitchable Spacer |
Author: | Salinas Uber, Jorge Estrader i Bofarull, Marta García Gómez, Jordi Lloyd-Williams, Paul Sadurní, Anna Dengler, Dominik van Slageren, Joris Chilton, Nicholas F. Roubeau, Olivier Teat, Simon J. Ribas Ariño, Jordi Aromí Bedmar, Guillem |
Keywords: | Compostos de coordinació Fotoquímica orgànica Propietats magnètiques Coordination compounds Organic photochemistry Magnetic properties |
Issue Date: | 4-Oct-2017 |
Publisher: | Wiley-VCH |
Abstract: | Controlling the charges and spins of molecules lies at the heart of spintronics. A photoswitchable molecule consisting of two independent spins separated by a photo- switchable moiety was designed in the form of new ligand H4L, which features a dithienylethene photochromic unit and two lateral coordinating moieties, and yields molecules with [MM···MM] topology. Compounds [M4L2(py)6] (M = Cu, 1; Co, 2; Ni, 3; Zn, 4) were prepared and studied by single-crys- tal X-ray diffraction (SCXRD). Different metal centers can be selectively distributed among the two chemically distinct sites of the ligand, and this enables the preparation of many double-spin systems. Heterometallic [MM'···M'M] analogues with formulas [Cu2Ni2L2(py)6] (5), [Co2Ni2L2(py)6] (6), [Co2Cu2L2(py)6] (7), [Cu2Zn2L2(py)6] (8), and [Ni2Zn2L2(py)6] (9) were prepared and analyzed by SCXRD. Their composition was established unambiguously. All complexes exhibit two weakly interacting [MM'] moieties, some of which embody two-level quantum systems. Compounds 5 and 8 each ex- hibit a pair of weakly coupled S = 1=2 spins that show quan- tum coherence in pulsed Q-band EPR spectroscopy, as re- quired for quantum computing, with good phase memory times (TM = 3.59 and 6.03 ms at 7 K). Reversible photoswitch- ing of all the molecules was confirmed in solution. DFT cal- culations on 5 indicate that the interaction between the two spins of the molecule can be switched on and off on photo- cyclization. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1002/chem.201702171 |
It is part of: | Chemistry-A European Journal, 2017, vol. 23, num. 55, p. 13648-13659 |
URI: | http://hdl.handle.net/2445/118837 |
Related resource: | https://doi.org/10.1002/chem.201702171 |
ISSN: | 0947-6539 |
Appears in Collections: | Articles publicats en revistes (Química Inorgànica i Orgànica) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
673642.pdf | 2.91 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.