Four-step spin-crossover in an oxamide-decorated metal-organic framework  

作　　者：Siguo Wu Sukhen Bala Zeyu Ruan Guozhang Huang Zhaoping Ni Mingliang Tong 

机构地区：[1]Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education,School of Chemistry,Sun Yat-Sen University,Guangzhou 510275,China

出　　处：《Chinese Chemical Letters》2022年第3期1381-1384,共4页中国化学快报（英文版）

基　　金：supported by the National Key Research and Development Program of China(No.2018YFA0306001);the National Natural Science Foundation of China(Nos.21950410521,21771200and 21773316);the Pearl River Talent Plan of Guangdong(No.2017BT01C161)。

摘　　要：Spin-crossover(SCO)complexes with multiple spin states are promising candidates for high-order magnetic storage and multiple switches.Here,by employing the N,N'-4-dipyridyloxalamide(dpo)ligand,we synthesize two Hofmann-type metal-organic frameworks(MOFs)[Fe(dpo){Ag(CN)_(2)}_(2)]·3DMF(1)and[Fe(dpo){Ag(CN)_(2)}_(2)]·0.5MeCN·2DEF(2),which exhibit guest dependent four-step SCO behaviors with the sequences of LS→~LS_(2/3)HS_(1/3)→LS_(1/2)HS_(1/2)→~LS_(3/10)HS_(7/10)→HS and LS→~LS_(2/3)HS_(1/3)→LS_(1/2)HS_(1/2)→~LS_(1/4)HS_(3/4)→HS,respectively.Therefore,the incorporation of hydrogen-donating/hydrogen-accepting groups into the Hofmann-type MOFs may effectively explore the multi-step SCO materials by tuning hydrogen-bonding interactions.

关 键 词：Spin crossover OXAMIDE Metal-organic framework Hofmann-type Host-guest interaction 

分 类 号：O641.3[理学—物理化学]