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Perylene-Based Covalent Organic Frameworks for Acid Vapor Sensing
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2019-09-24 , DOI: 10.1021/jacs.9b08079 Laura Ascherl 1 , Emrys W Evans 2 , Jeffrey Gorman 2 , Sarah Orsborne 2 , Derya Bessinger 1 , Thomas Bein 1 , Richard H Friend 2 , Florian Auras 2
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2019-09-24 , DOI: 10.1021/jacs.9b08079 Laura Ascherl 1 , Emrys W Evans 2 , Jeffrey Gorman 2 , Sarah Orsborne 2 , Derya Bessinger 1 , Thomas Bein 1 , Richard H Friend 2 , Florian Auras 2
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Traditionally, the properties and functions of covalent organic frameworks (COFs) are defined by their constituting building blocks, while the chemical bonds that connect the individual subunits have not attracted much attention as functional components of the final material. We have developed a new series of dual-pore perylene-based COFs and demonstrated that their imine bonds can be protonated reversibly, causing significant protonation-induced color shifts toward the near-infrared, while the structure and crystallinity of the frameworks are fully retained. Thin films of these COFs are highly sensitive colorimetric acid vapor sensors with a detection limit as low as 35 μg L-1 and a response range of at least 4 orders of magnitude. Since the acidochromism in our COFs is a cooperative phenomenon based on electronically coupled imines, the COFs can be used to determine simultaneously the concentration and protonation strength of nonaqueous acid solutions, in which pH electrodes are not applicable, and to distinguish between different acids. Including the imine bonds as function-determining constituents of the framework provides an additional handle for constructing multifunctional COFs and extending the range of their possible applications.
中文翻译：
用于酸蒸汽传感的基于苝的共价有机框架
传统上，共价有机骨架 (COF) 的性质和功能由它们的构成构件定义，而连接各个亚基的化学键作为最终材料的功能成分并未引起太多关注。我们开发了一系列新的基于双孔苝的 COFs，并证明它们的亚胺键可以可逆地质子化，导致显着的质子化引起的近红外颜色偏移，同时完全保留框架的结构和结晶度。这些 COF 薄膜是高灵敏度的比色酸蒸汽传感器，检测限低至 35 μg L-1，响应范围至少为 4 个数量级。由于我们的 COF 中的酸致变色是一种基于电子耦合亚胺的协同现象，COF 可用于同时测定不适用 pH 电极的非水酸溶液的浓度和质子化强度，以及区分不同的酸。包括亚胺键作为框架的功能决定成分为构建多功能 COF 和扩展其可能的应用范围提供了额外的手段。
更新日期：2019-09-24
中文翻译：
用于酸蒸汽传感的基于苝的共价有机框架
传统上，共价有机骨架 (COF) 的性质和功能由它们的构成构件定义，而连接各个亚基的化学键作为最终材料的功能成分并未引起太多关注。我们开发了一系列新的基于双孔苝的 COFs，并证明它们的亚胺键可以可逆地质子化，导致显着的质子化引起的近红外颜色偏移，同时完全保留框架的结构和结晶度。这些 COF 薄膜是高灵敏度的比色酸蒸汽传感器，检测限低至 35 μg L-1，响应范围至少为 4 个数量级。由于我们的 COF 中的酸致变色是一种基于电子耦合亚胺的协同现象，COF 可用于同时测定不适用 pH 电极的非水酸溶液的浓度和质子化强度，以及区分不同的酸。包括亚胺键作为框架的功能决定成分为构建多功能 COF 和扩展其可能的应用范围提供了额外的手段。
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