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Novel Photo‐ and Thermo‐Responsive Host‐Guest Compounds Derived from Ethyl Viologen Cations
ChemistrySelect ( IF 1.9 ) Pub Date : 2018-07-30 , DOI: 10.1002/slct.201801793
Jinjian Liu 1, 2
Affiliation  

The self‐assembly reaction of TM(NO3)2 (TM=Co, Ni), benzenedicarboxylic acid (H2BDC), and ethyl viologen cations leads to two novel host‐guest compounds (EV)[Co(H2O)6](p‐BDC)2⋅4H2O (1) and {(EV)[Ni3(m‐BDC)4]}n (2), (p‐H2BDC=1,4‐benzenedicarboxylic acid, m‐H2BDC=1,3‐benzenedicarboxylic acid, EV2+=1,1’‐bis(ethyl)‐4,4’‐bipyridinium dication). Compound 1 is a host‐guest supramolecule consisting of one EV2+ cation, one [Co(H2O)6]2+ cation, two uncoordinated deprotonated p‐BDC2− anions and four free H2O molecules, which exhibits electron‐transfer (ET) photochromism and thermochromism through dehydration and rehydration. Furthermore, 1 can exhibit a secondary ET photochromism after thermal stimuli. Compound 2 is constructed by the combination of ethyl viologen guest molecule and a highly stable [Ni3(m‐BDC)4]n host MOF, displaying both photo‐ and thermo‐induced electron transfer reaction. The different packing modes of the donor and acceptor blocks between 1 and 2 lead to the different chromic properties.

中文翻译:

源自乙基紫精阳离子的新型光响应和热响应型客体化合物

TM(NO 32(TM = Co,Ni),苯二甲酸(H 2 BDC)和乙基紫精阳离子的自组装反应产生了两种新型的主客体化合物(EV)[Co(H 2 O)6 ](p -BDC)2 ⋅4H 2 O(1)和{(EV)[倪3-BDC)4 ]} ñ2),(p -H 2 BDC = 1,4-苯二甲酸,m -H 2 BDC = 1,3-苯二甲酸,EV 2+ = 1,1'-双(乙基)-4,4'-联吡啶鎓)。化合物1是由客体组成的超分子,由一个EV 2+阳离子,一个[Co(H 2 O)6 ] 2+ 阳离子,两个未配位的去质子化的p- BDC 2- 阴离子和四个游离的H 2 O分子组成,它们显示电子通过脱水和再水合转移(ET)光致变色和热致变色。此外,在热刺激后1可以表现出次级ET光致变色。化合物2是由乙基紫精客体分子和高度稳定的[Ni 3m -BDC)4 ] n组合而成的。主持人MOF,同时显示了光诱导和热诱导的电子转移反应。供体和受体嵌段在12之间的不同填充模式会导致不同的色性。
更新日期:2018-07-30
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