单线态氧
光化学
光催化
反应性(心理学)
材料科学
系统间交叉
硫化物
化学
单重态
有机化学
氧气
催化作用
激发态
核物理学
病理
替代医学
物理
医学
作者
Ann M. Kulisiewicz,Sergio J. Garibay,Gabrielle R. Pozza,Matthew A. Browe,Owen Sparr,Sumitra Singh,Lisa A. Kelly,Jared B. DeCoste
标识
DOI:10.1021/acsami.3c06011
摘要
Metal–organic frameworks (MOFs) are highly versatile materials that have shown great promise in chemical warfare agent (CWA) adsorption and decontamination. Sulfur mustard has been one of the most prominently used CWAs over the last century; therefore, the development of effective detoxification strategies is of utmost importance. However, typical routes of detoxification are slow and/or result in the production of harmful byproducts. NU-1000 has previously shown promise as a “soft” oxidizer that can readily detoxify sulfur mustard and its simulant 2-chloroethyl ethyl sulfide (2-CEES) through the generation of singlet oxygen in the presence of either UV (396 nm) or blue (465 nm) light. Several variants of NU-1000 were synthesized (MOF-R, R = −Cl, −NO2, −CH3) with functional groups positioned either ortho or meta to the carboxylic acid on the linker. NU-1000-o-(Cl)4 and NU-1000-m-(Cl)4 showed significant enhancement of photooxidation of 2-CEES due to spin–orbit coupling, enhancing the intersystem crossing into the MOF triplet (T1) state. Furthermore, substitution of MOF linkers led to pyrene–phenyl rotation. Linkers with substituents in the ortho-position were shown to have smaller pyrene–phenyl torsion angles, leading to enhanced conjugation between the rings and a subsequent red shift in the absorption spectra. This red shift leads to enhanced reactivity of NU-1000-o-(Cl)4 under blue light conditions and gives perspective on making materials with enhanced reactivity utilizing visible light.
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