Perturbing the spin crossover transition activation energies in Fe(H2B(pz)2)2(bipy) with zwitterionic additions

Paulo Costa; Guanhua Hao; Alpha T. N'Diaye; Lucie Routaboul; Pierre Braunstein; Xin Zhang; Jian Zhang; Bernard Doudin; Axel Enders; Peter A. Dowben

doi:10.1088/1361-648X/aacd7e

Perturbing the spin crossover transition activation energies in Fe(H₂B(pz)₂)₂(bipy) with zwitterionic additions

Paulo Costa, Guanhua Hao, Alpha T. N'Diaye, Lucie Routaboul, Pierre Braunstein, Xin Zhang, Jian Zhang, Bernard Doudin, Axel Enders, Peter A. Dowben

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

A thermal component to the soft x-ray induced spin crossover transition exists in the switching of a spin crossover compound (complex [Fe{H₂B(pz)₂}₂(bipy)] (pz = pyrazol-1-yl, bipy = 2,2′-bipyridine) combined with the dipolar molecular additives (zwitterionic p-benzoquinonemonoimine C₆H₂()₂()₂). The addition of the zwitterionic molecule locks the Fe(II) complex in a largely low spin state configuration over an unusually broad temperature range that includes temperatures well above the thermal spin crossover temperature of 160 K. It is demonstrated here that the process of exciting the [Fe{H₂B(pz)₂}₂(bipy)] moiety, in the presence of with C₆H₂()₂()₂, to an electronic state characteristic of the high spin state though incident x-ray fluences, has a thermal activation energies are determined to 14-18 meV for a range of mixing ratios from 1:2 to 1:10. Those activation energies are also significantly reduced as compared to values of 60-80 meV found for nanometer thin films of [Fe{H₂B(pz)₂}₂(bipy)] on SiO₂.

Original language	English (US)
Article number	305503
Journal	Journal of Physics Condensed Matter
Volume	30
Issue number	30
DOIs	https://doi.org/10.1088/1361-648X/aacd7e
State	Published - Jul 5 2018

Keywords

SOXIESST
XAS
spin crossover
zwitterions

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1088/1361-648X/aacd7e

Fingerprint Dive into the research topics of 'Perturbing the spin crossover transition activation energies in Fe(H2B(pz)2)2(bipy) with zwitterionic additions'. Together they form a unique fingerprint.

Cite this

Perturbing the spin crossover transition activation energies in Fe(H₂B(pz)₂)₂(bipy) with zwitterionic additions. / Costa, Paulo; Hao, Guanhua; N'Diaye, Alpha T.; Routaboul, Lucie; Braunstein, Pierre; Zhang, Xin; Zhang, Jian; Doudin, Bernard; Enders, Axel; Dowben, Peter A.

In: Journal of Physics Condensed Matter, Vol. 30, No. 30, 305503, 05.07.2018.

Research output: Contribution to journal › Article › peer-review

@article{f7defc1f40de4f5bab80c010cd71f031,

title = "Perturbing the spin crossover transition activation energies in Fe(H2B(pz)2)2(bipy) with zwitterionic additions",

abstract = "A thermal component to the soft x-ray induced spin crossover transition exists in the switching of a spin crossover compound (complex [Fe{H2B(pz)2}2(bipy)] (pz = pyrazol-1-yl, bipy = 2,2′-bipyridine) combined with the dipolar molecular additives (zwitterionic p-benzoquinonemonoimine C6H2()2()2). The addition of the zwitterionic molecule locks the Fe(II) complex in a largely low spin state configuration over an unusually broad temperature range that includes temperatures well above the thermal spin crossover temperature of 160 K. It is demonstrated here that the process of exciting the [Fe{H2B(pz)2}2(bipy)] moiety, in the presence of with C6H2()2()2, to an electronic state characteristic of the high spin state though incident x-ray fluences, has a thermal activation energies are determined to 14-18 meV for a range of mixing ratios from 1:2 to 1:10. Those activation energies are also significantly reduced as compared to values of 60-80 meV found for nanometer thin films of [Fe{H2B(pz)2}2(bipy)] on SiO2.",

keywords = "SOXIESST, XAS, spin crossover, zwitterions",

author = "Paulo Costa and Guanhua Hao and N'Diaye, {Alpha T.} and Lucie Routaboul and Pierre Braunstein and Xin Zhang and Jian Zhang and Bernard Doudin and Axel Enders and Dowben, {Peter A.}",

note = "Funding Information: This research was supported by the National Science Foundation through NSF-Chem 1565692 (PC, GH, PAD) and the Nebraska MRSEC (DMR-1420645) (AE, PC, JL, XJ, JZ). Partial financial support of the Agence Nationale de la Recherche (MULTISELF 11-BS08-06, Labex NIE 11-LABX-0058_NIE within the Investissement d{\textquoteright}Avenir program ANR-10-IDEX-0002-02), and the International Center for Frontier Research in Chemistry (icFRC, Strasbourg) are also gratefully acknowledged. Use of the Advanced Light Source, Lawrence Berkeley National Laboratory, was supported by the US Department of Energy under contract no. DE-AC02-05CH11231. Publisher Copyright: {\textcopyright} 2018 IOP Publishing Ltd.",

year = "2018",

month = jul,

day = "5",

doi = "10.1088/1361-648X/aacd7e",

language = "English (US)",

volume = "30",

journal = "Journal of Physics Condensed Matter",

issn = "0953-8984",

publisher = "IOP Publishing Ltd.",

number = "30",

}

TY - JOUR

T1 - Perturbing the spin crossover transition activation energies in Fe(H2B(pz)2)2(bipy) with zwitterionic additions

AU - Costa, Paulo

AU - Hao, Guanhua

AU - N'Diaye, Alpha T.

AU - Routaboul, Lucie

AU - Braunstein, Pierre

AU - Zhang, Xin

AU - Zhang, Jian

AU - Doudin, Bernard

AU - Enders, Axel

AU - Dowben, Peter A.

N1 - Funding Information: This research was supported by the National Science Foundation through NSF-Chem 1565692 (PC, GH, PAD) and the Nebraska MRSEC (DMR-1420645) (AE, PC, JL, XJ, JZ). Partial financial support of the Agence Nationale de la Recherche (MULTISELF 11-BS08-06, Labex NIE 11-LABX-0058_NIE within the Investissement d’Avenir program ANR-10-IDEX-0002-02), and the International Center for Frontier Research in Chemistry (icFRC, Strasbourg) are also gratefully acknowledged. Use of the Advanced Light Source, Lawrence Berkeley National Laboratory, was supported by the US Department of Energy under contract no. DE-AC02-05CH11231. Publisher Copyright: © 2018 IOP Publishing Ltd.

PY - 2018/7/5

Y1 - 2018/7/5

N2 - A thermal component to the soft x-ray induced spin crossover transition exists in the switching of a spin crossover compound (complex [Fe{H2B(pz)2}2(bipy)] (pz = pyrazol-1-yl, bipy = 2,2′-bipyridine) combined with the dipolar molecular additives (zwitterionic p-benzoquinonemonoimine C6H2()2()2). The addition of the zwitterionic molecule locks the Fe(II) complex in a largely low spin state configuration over an unusually broad temperature range that includes temperatures well above the thermal spin crossover temperature of 160 K. It is demonstrated here that the process of exciting the [Fe{H2B(pz)2}2(bipy)] moiety, in the presence of with C6H2()2()2, to an electronic state characteristic of the high spin state though incident x-ray fluences, has a thermal activation energies are determined to 14-18 meV for a range of mixing ratios from 1:2 to 1:10. Those activation energies are also significantly reduced as compared to values of 60-80 meV found for nanometer thin films of [Fe{H2B(pz)2}2(bipy)] on SiO2.

AB - A thermal component to the soft x-ray induced spin crossover transition exists in the switching of a spin crossover compound (complex [Fe{H2B(pz)2}2(bipy)] (pz = pyrazol-1-yl, bipy = 2,2′-bipyridine) combined with the dipolar molecular additives (zwitterionic p-benzoquinonemonoimine C6H2()2()2). The addition of the zwitterionic molecule locks the Fe(II) complex in a largely low spin state configuration over an unusually broad temperature range that includes temperatures well above the thermal spin crossover temperature of 160 K. It is demonstrated here that the process of exciting the [Fe{H2B(pz)2}2(bipy)] moiety, in the presence of with C6H2()2()2, to an electronic state characteristic of the high spin state though incident x-ray fluences, has a thermal activation energies are determined to 14-18 meV for a range of mixing ratios from 1:2 to 1:10. Those activation energies are also significantly reduced as compared to values of 60-80 meV found for nanometer thin films of [Fe{H2B(pz)2}2(bipy)] on SiO2.

KW - SOXIESST

KW - XAS

KW - spin crossover

KW - zwitterions

UR - http://www.scopus.com/inward/record.url?scp=85049887190&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85049887190&partnerID=8YFLogxK

U2 - 10.1088/1361-648X/aacd7e

DO - 10.1088/1361-648X/aacd7e

M3 - Article

C2 - 29916814

AN - SCOPUS:85049887190

VL - 30

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

SN - 0953-8984

IS - 30

M1 - 305503

ER -