Real‐Time In Situ Volatile Organic Compound Sensing by a Dual‐Emissive Polynuclear Ln‐MOF with Pronounced LnIII Luminescence Response. (10th January 2023)

• Record Type: Journal Article
• Authors: Pang, Jing‐Jing; Yao, Zhao‐Quan; Zhang, Kuo; Li, Quan‐Wen; Fu, Zi‐Xuan; Zheng, Ran; Li, Wei; Xu, Jian; Bu, Xian‐He
• Is Part Of: Angewandte Chemie. Volume 135:Number 7(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-10
• Subjects: Lanthanide Polynuclear Clusters -- Metal–Organic Frameworks -- Ratiometric Luminescence Behavior -- Temperature Sensing -- Volatile Organic Compound Detection; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202217456
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Lanthanide metal–organic frameworks (Ln‐MOFs) are promising for luminescence detection of volatile organic compound (VOC) vapors, but usually suffer from the silent or quenched Ln 3+ emission. Herein, we report a new dual‐emissive Eu‐MOF composed of the coordinatively unsaturated Eu9 clusters that afford abundant open metal sites to form a confined "binding pocket" to facilitate the preconcentration and recognition of VOCs. Single‐crystal structural analyses reveal that specific analytes can replace the OH oscillators in the first coordination sphere of Eu 3+ and form a unique hydrogen‐bonding second‐sphere adduct tying adjacent Eu9 clusters together to minimize their nonradiative vibrational decay. With the promoted Eu 3+ luminescence, the MOF realizes real‐time in situ visual sensing of THF vapor (<1 s) and shows a quantitative ratiometric response to the vapor pressure with a limit of detection down to 17.33 Pa. Also, it represents a top‐performing ratiometric luminescent thermometer. Abstract : A dual‐emissive polynuclear Eu‐MOF enriched with abundant potential open metal sites was constructed. In terms of a novel recognition‐transduction protocol, this material realized real‐time in situ visual detection of THF vapor (<1 s) while showing a quantitative ratiometric response to vapor pressure with an ultralow limit of detection.