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Encapsulating Halometallates into 3-D Lanthanide-Viologen Frameworks: Controllable Emissions, Reversible Thermochromism, Photocurrent Responses, and Electrical Bistability Behaviors
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2019-09-27 00:00:00 , DOI: 10.1021/acs.inorgchem.9b01740
Yan He 1 , You-Ren Huang 1 , Yan-Li Li 1 , Hao-Hong Li 1 , Zhi-Rong Chen 1 , Rong Jiang 1
Affiliation  

The encapsulation of guests into metal–organic frameworks (MOF) is an efficient strategy to generate novel multifunctional materials with enhanced properties. Herein, four halometallate@MOF composites with formulas of {(Pb2I4Br3)[(Pr(bpdo)4(H2O)2]·(H2O)}n (1), {[Pb3I10(H2O)2][Y2(bpdo)5(OH)2]·4(H2O)}n (2), {(Bi2I9)[(Pr(bpdo)3(H2O)]}n (3), {(Bi4I18)[(La(bpdo)4(H2O)2]2}n (4) (bpdo = 4,4′-bipyridine N,N′-dioxide) were prepared. In these composites, lanthanide-viologen MOF act as matrices, whose cavities were penetrated by halometallates. Consequently, the insertion of electron-rich halometallates into electron-deficient lanthanide-viologen matrices leads to the presence of strong room temperature charge transfer (CT) interactions. Importantly, these composites exhibit enhanced photo/thermal stabilities, controllable white emissions, reversible thermochromisms, and good photocurrent response performances. Specially, the memory devices based on these composites illustrate reversible electrical bistability behaviors, which can be assigned to ohmic and space-charge-limited conduction (SCLC) mechanisms. This kind of composite can be utilized as a multifunctional platform with enhanced stability.

中文翻译:

将卤化金属盐封装到3-D镧系元素-紫精框架中:可控发射,可逆热致变色,光电流响应和电双稳态行为

将客人封装在金属有机框架(MOF)中是一种产生具有增强性能的新型多功能材料的有效策略。在此,4 halometallate @ MOF复合材料{(铅的式243)[(镨bpdo()4 H(2 O)2 ]·H(2 O)} Ñ1),{[铅310(H 2 O)2 ] [Y 2(bpdo)5(OH)2 ]·4(H 2 O)} n2),{(Bi 2 I 9)[(Pr(bpdo)3(H 2 O)]} n3),{(Bi 4 I 18)[(La(bpdo)4(H 2 O)2 ] 2 } n4)(bpdo = 4,4'-联吡啶NN制备了'-二氧化物)。在这些复合物中,镧系元素-紫精MOF充当基质,其空腔被卤化金属盐穿透。因此,将富电子的卤代金属盐插入缺乏电子的镧系元素-紫精基质中会导致存在强烈的室温电荷转移(CT)相互作用。重要的是,这些复合材料表现出增强的光/热稳定性,可控的白色发射,可逆的热致变色以及良好的光电流响应性能。特别地,基于这些复合材料的存储设备说明了可逆的电双稳态行为,可以将其分配给欧姆和空间电荷限制传导(SCLC)机制。这种复合材料可以用作具有增强稳定性的多功能平台。
更新日期:2019-09-27
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