Thermal and Light-Activated Spin Crossover in Iron(III) qnal Complexes

被引：12

作者：

Thammasangwan, Warisa ^{[1
]}

Harding, Phimphaka ^{[1
]}

Telfer, Shane G. ^{[2
]}

Alkas, Adil ^{[2
]}

Phonsri, Wasinee ^{[3
]}

Murray, Keith S. ^{[3
]}

Clerac, Rodolphe ^{[4
]}

Rouzieres, Mathieu ^{[4
]}

Chastanet, Guillaume ^{[5
]}

Harding, David J. ^{[1
]}

机构：

[1] Walailak Univ, Funct Mat & Nanotechnol Ctr Excellence, Thasala 80160, Nakhon Si Thamm, Thailand

[2] Massey Univ, Inst Fundamental Sci, MacDiarmid Inst Adv Mat & Nanotechnol, POB 600, Wellington 6140, New Zealand

[3] Monash Univ, Sch Chem, Melbourne, Vic 3800, Australia

[4] Univ Bordeaux, CNRS, Ctr Rech Paul Pascal, UMR 5031, F-33600 Pessac, France

[5] Univ Bordeaux, CNRS, ICMCB, 87 Ave Dr A Schweitzer, F-33608 Pessac, France

来源：

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2020年 / 2020卷 / 14期

基金：

澳大利亚研究理事会;

关键词：

Spin crossover; Iron; Light-induced excited spin state trapping; Structure elucidation; FE-III COMPLEX; STATE TRANSFORMATION; PI-STACKING; TRANSITION; TEMPERATURE; PRESSURE; SERIES; COOPERATIVITY; MODULATION; HYSTERESIS;

D O I：

10.1002/ejic.202000115

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Three iron(III) complexes, [Fe(qnal)(2)]Y {qnal = 1-[(8-quinolinylimino)methyl]-2-naphthalenolate; Y = NO3 1, BPh4 center dot CH2Cl2 2, NCS 3} have been prepared to explore anion effects in spin crossover systems. Structural studies on 2 reveal supramolecular chains formed by pi-pi and C-H center dot center dot center dot pi interactions between the [Fe(qnal)(2)](+) cations. Magnetic susceptibility measurements show the onset of spin crossover in 1 above 200 K, while complete spin crossover is observed in 2 and 3 with T-1/2 = 285 and 340 K, respectively. Unusually, 2 also undergoes light-induced excited spin state trapping (LIESST) at 980 nm with ca. 65 % efficiency and T(LIESST) = 25 K and reverse-LIESST at 660 nm with full reversibility over many cycles. The results highlight the important influence that the anion has on thermal and light-activated spin crossover properties.

引用

页码：1325 / 1330

页数：6

共 66 条

[1]

[Anonymous], 2018, ANGEW CHEM, V130, P8604

[2]

[Anonymous], 2019, ANGEW CHEM, V131, P5714

[3] Snapshots of a solid-state transformation: coexistence of three phases trapped in one crystal [J].

Aromi, G. ;

Beavers, C. M. ;

Sanchez Costa, J. ;

Craig, G. A. ;

Minguez Espallargas, G. ;

Orera, A. ;

Roubeau, O. .

CHEMICAL SCIENCE, 2016, 7 (04) :2907-2915

[4] Femtosecond spin-state photo-switching dynamics in an FeIII spin crossover solid accompanied by coherent structural vibrations [J].

Bertoni, R. ;

Lorenc, M. ;

Laisney, J. ;

Tissot, A. ;

Moreac, A. ;

Matar, S. F. ;

Boillot, M. -L. ;

Collet, E. .

JOURNAL OF MATERIALS CHEMISTRY C, 2015, 3 (30) :7792-7801

[5]

Boonprab T., 2019, ANGEW CHEM, V131, P11937

[6] The First Observation of Hidden Hysteresis in an Iron(III) Spin-Crossover Complex [J].

Boonprab, Theerapoom ;

Lee, Seok J. ;

Telfer, Shane G. ;

Murray, Keith S. ;

Phonsri, Wasinee ;

Chastanet, Guillaume ;

Collet, Eric ;

Trzop, Elzbieta ;

Jameson, Guy N. L. ;

Harding, Phimphaka ;

Harding, David J. .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2019, 58 (34) :11811-11815

[7] Spin crossover with thermal hysteresis: practicalities and lessons learnt [J].

Brooker, Sally .

CHEMICAL SOCIETY REVIEWS, 2015, 44 (10) :2880-2892

[8]

Chastanet G., 2018, Chemistry Squared - Chem2, V2, P2, DOI DOI 10.28954/2018.CSQ.07.001

[9] Structural analysis of spin-crossover materials: From molecules to materials [J].

Collet, Eric ;

Guionneau, Philippe .

COMPTES RENDUS CHIMIE, 2018, 21 (12) :1133-1151

[10] Local Coordination Geometry and Spin State in Novel FeII Complexes with 2,6-Bis(pyrazol-3-yl)pyridine-Type Ligands as Controlled by Packing Forces: Structural Correlations [J].

Craig, Gavin A. ;

Sanchez Costa, Jose ;

Roubeau, Olivier ;

Teat, Simon J. ;

Aromi, Guillem .

CHEMISTRY-A EUROPEAN JOURNAL, 2012, 18 (37) :11703-11715

← 1 2 3 4 5 6 7 →