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刚性非五齿配体辅助的八配位单核Ln(III)配合物：合成、表征及缓慢的磁化弛豫

Rigid NO-Pentadentate Ligand-Assisted Octacoordinate Mononuclear Ln(III) Complexes: Syntheses, Characterization, and Slow Magnetization Relaxation.

作者信息

Singh Vaibhav, Das Dhiraj, Anga Srinivas, Sutter Jean-Pascal, Chandrasekhar Vadapalli, Bar Arun Kumar

机构信息

Indian Institute of Science Education and Research Tirupati, Tirupati 517507 AP, India.

Tata Institute of Fundamental Research Hyderabad, Gopanpally, Hyderabad 500107, India.

出版信息

ACS Omega. 2022 Jul 13;7(29):25881-25890. doi: 10.1021/acsomega.2c03631. eCollection 2022 Jul 26.

DOI:10.1021/acsomega.2c03631
PMID:35910178
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9330846/
Abstract

A series of air-stable mononuclear octacoordinate Ln(III) complexes, [(L)Ln(TPPO)]OTf (Ln = Y (); Gd (); Tb (); Dy (); Ho (); and Er ()) and [(L)Ln(TPPO)(NO)] (Ln = Y () and Dy ()), are synthesized employing a rigid NO-pentadentate chelating ligand as the basis ligand and meridional ancillary ligands (where HL = 2,6-diacetylpyridine -benzoylhydrazone, TPPO = triphenylphosphine oxide, and OTf = trifluoromethanesulfonate). All the complexes are synthesized under aerobic conditions and characterized comprehensively by spectroscopic and X-ray crystallographic techniques. Magnetic property investigation on the polycrystalline solid samples of (Ln = Gd, Tb, Dy, Ho, and Er) and are reported. A field-induced single-molecule magnet behavior was observed for the Dy derivatives. exhibits the highest effective energy barrier of magnetization reversal, / = 47 K under = 1 kOe among the complexes presented herein.

摘要

一系列空气稳定的单核八配位Ln(III)配合物，[(L)Ln(TPPO)]OTf（Ln = Y（）；Gd（）；Tb（）；Dy（）；Ho（）；和Er（））以及[(L)Ln(TPPO)(NO)]（Ln = Y（）和Dy（）），是以刚性的NO-五齿螯合配体作为基础配体和经式辅助配体合成的（其中HL = 2,6-二乙酰基吡啶-苯甲酰腙，TPPO = 三苯基氧化膦，OTf = 三氟甲磺酸盐）。所有配合物均在有氧条件下合成，并通过光谱和X射线晶体学技术进行了全面表征。报道了对（Ln = Gd、Tb、Dy、Ho和Er）和的多晶固体样品的磁性研究。观察到Dy衍生物具有场诱导单分子磁体行为。在本文介绍的配合物中，在 = 1 kOe下表现出最高的磁化反转有效能垒，/ = 47 K。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/8bcab502456d/ao2c03631_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/4b1decde7648/ao2c03631_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/892e5d5c1794/ao2c03631_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/de6109553147/ao2c03631_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/8bcab502456d/ao2c03631_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/4b1decde7648/ao2c03631_0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/892e5d5c1794/ao2c03631_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/de6109553147/ao2c03631_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/49ac/9330846/8bcab502456d/ao2c03631_0004.jpg

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