Chiral effects at the metal center in Fe(III) spin crossover coordination salts

Zaz, M. Zaid; Chin, Wai Kiat; Viswan, Gauthami; Subedi, Arjun; Mishra, Esha; McElveen, Kayleigh A.; Tamang, Binny; Shapiro, David; N’Diaye, Alpha T.; Lai, Rebecca Y.; Dowben, Peter A.

doi:10.1088/1361-648x/ada338

Chiral effects at the metal center in Fe(III) spin crossover coordination salts

Journal Article · Mon Jan 06 00:00:00 EST 2025 · Journal of Physics. Condensed Matter

DOI:https://doi.org/10.1088/1361-648x/ada338· OSTI ID:2530553

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Univ. of Nebraska, Lincoln, NE (United States)
Univ. of Nebraska, Lincoln, NE (United States); Berry College, Mount Berry, GA (United States)
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Evidence of chirality was observed at the Fe metal center in Fe(III) spin crossover coordination salts [Fe(qsal)₂][Ni(dmit)₂] and [Fe(qsal)₂](TCNQ)₂ from x-ray absorption (XAS) spectroscopy at the Fe 2p_3/2 core threshold. Based on the circularly polarized XAS data, the x-ray natural circular dichroism for [Fe(qsal)₂][Ni(dmit)₂] and [Fe(qsal)₂](TCNQ)₂ is far stronger than seen for [Fe(qsal)₂]Cl suggesting this natural circular dichroism signature is a ligand effect rather than a result of just a loss of octahedral symmetry on the Fe core. The larger the chiral effects in the Fe 2p core to bound XAS, the greater the perturbation of the Fe 2p_3/2 to 2p_1/2 spin–orbit splitting seen in the XAS spectra.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Sponsoring Organization:: National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 2530553

Journal Information:: Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 10 Vol. 37; ISSN 0953-8984

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Chiral effects at the metal center in Fe(III) spin crossover coordination salts

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