Homochiral Dy2Zn2 zero-field single-molecule magnets derived from (R)/(S)-2-methoxy-2-phenylacetic acids

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-08-12 DOI:10.1039/D5DT01609F

Cai-Ming Liu, Xiang Hao and Yi-Quan Zhang

{"title":"Homochiral Dy2Zn2 zero-field single-molecule magnets derived from (R)/(S)-2-methoxy-2-phenylacetic acids","authors":"Cai-Ming Liu, Xiang Hao and Yi-Quan Zhang","doi":"10.1039/D5DT01609F","DOIUrl":null,"url":null,"abstract":"Despite the unique advantages of multifunctional integration at the nanoscale, chiral zero-field single-molecule magnets (SMMs), especially those based on homochiral carboxylic acids, are still difficult to obtain. Herein, homochiral (R)/(S)-2-methoxy-2-phenylacetic acids (R-HMPA)/(S-HMPA) were selected as the bridging ligands to assemble a pair of Dy2Zn2 enantiomers based on the Schiff base ligand (E)-2-((2-hydroxy-3-methoxybenzylidene)amino)phenol (H2LSchiff), [Dy2Zn2(S-MPA)2(LSchiff)4(DMF)2]·2DMF (S-1) (DMF = N,N-dimethylformamide) and [Dy2Zn2(R-MPA)2(LSchiff)4(DMF)2]·2DMF (R-1), which possess a [Dy2Zn2O6] defective dicubane core. The CD spectra of R-1 and S-1 confirmed their enantiomeric nature and chiral optical activities. Magnetic studies revealed that they are good zero-field SMMs, with a relatively large Ueff/k value of 234.6 K at 0 Oe and an obvious hysteresis loop at 3.0 K; notably, these magnetic properties could be explained using ab initio calculations.","PeriodicalId":71,"journal":{"name":"Dalton Transactions","volume":" 36","pages":" 13522-13528"},"PeriodicalIF":3.3000,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/dt/d5dt01609f?page=search","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Dalton Transactions","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/dt/d5dt01609f","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}

引用次数: 0

Abstract

Despite the unique advantages of multifunctional integration at the nanoscale, chiral zero-field single-molecule magnets (SMMs), especially those based on homochiral carboxylic acids, are still difficult to obtain. Herein, homochiral (R)/(S)-2-methoxy-2-phenylacetic acids (R-HMPA)/(S-HMPA) were selected as the bridging ligands to assemble a pair of Dy₂Zn₂ enantiomers based on the Schiff base ligand (E)-2-((2-hydroxy-3-methoxybenzylidene)amino)phenol (H₂L_Schiff), [Dy₂Zn₂(S-MPA)₂(L_Schiff)₄(DMF)₂]·2DMF (S-1) (DMF = N,N-dimethylformamide) and [Dy₂Zn₂(R-MPA)₂(L_Schiff)₄(DMF)₂]·2DMF (R-1), which possess a [Dy₂Zn₂O₆] defective dicubane core. The CD spectra of R-1 and S-1 confirmed their enantiomeric nature and chiral optical activities. Magnetic studies revealed that they are good zero-field SMMs, with a relatively large U_eff/k value of 234.6 K at 0 Oe and an obvious hysteresis loop at 3.0 K; notably, these magnetic properties could be explained using ab initio calculations.

查看原文本刊更多论文

由(R)/(S)-2-甲氧基-2-苯基乙酸衍生的同手性Dy2Zn2零场单分子磁体

尽管在纳米尺度上具有多功能集成的独特优势，但手性零场单分子磁体（SMMs），特别是基于同手性羧酸的单分子磁体，仍然很难获得。本文选择同手性(R)/(S)-2-甲氧基-2-苯基乙酸(R- hmpa)/(S- hmpa)作为桥接配体，以希夫碱配体(E)-2-（2-羟基-3-甲氧基苄基-氨基）苯酚（H2LSchiff）、[Dy2Zn2(S- mpa)2(LSchiff)4(DMF)2]·2DMF (S-1) （DMF = N，N-二甲基甲酰胺）和[Dy2Zn2(R- mpa)2(LSchiff)4(DMF)2]·2DMF （R-1）为基础组装一对Dy2Zn2(R- mpa)2(LSchiff) 2]·2DMF （R-1）对映体，其核心具有[Dy2Zn2O6]缺陷。R-1和S-1的CD光谱证实了它们的对映体性质和手性光学活性。磁性研究表明，它们是良好的零场smm，在0 Oe时具有较大的Ueff/k值，为234.6 k，在3.0 k时具有明显的磁滞回线；值得注意的是，这些磁性可以用从头算来解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.