Pressure‐Induced Multiphoton Excited Fluorochromic Metal–Organic Frameworks for Improving MPEF Properties. (19th August 2019)

• Record Type: Journal Article
• Authors: Chen, Cheng‐Xia; Yin, Shao‐Yun; Wei, Zhang‐Wen; Qiu, Qian‐Feng; Zhu, Neng‐Xiu; Fan, Ya‐Nan; Pan, Mei; Su, Cheng‐Yong
• Is Part Of: Angewandte Chemie. Volume 131:Number 40(2019)
• Page Start: 14517
• Page End: 14523
• Publication Date: 2019-08-19
• Subjects: Druckinduzierter Fluorochromismus -- Metall-organische Gerüstverbindungen -- Multiphotonenanregungsemission; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201908793
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: In multiphoton excited fluorescence (MPEF), high‐energy upconversion emission is obtained from low‐energy excitation by absorbance of two or more photons simultaneously. In a pressure‐induced fluorochromic process, the emission energy is switched by outer pressure stimuli. Now, five metal–organic frameworks containing the same ligand with simultaneous multiphoton absorption and pressure‐induced fluorochromic attributes were studied. One‐, two‐, and three‐photon excited fluorescence (1/2/3PEF) can be achieved in the frameworks, which exhibit pressure‐induced blue‐to‐yellow fluorochromism. The performances are closely dependent with the topologies, flexibilities, and packing states of the frameworks and chromophores therein. The multiphoton upconversion performance can be intensified by pressure‐related structural contraction. Over ten‐fold increment in the 2PA active cross‐section up to 2217 GM is achieved in pressed LIFM‐114 compared with the 210 GM for pristine sample at 780 nm. Abstract : 1, 2 oder 3 : 1/2/3PEF (photonenangeregte Fluoreszenz) wurde mit druckinduziertem Fluorochromismus in MOFs korreliert. Die multiphotonenangeregte fluorochrome Leistung kann durch Druckstimulation deutlich erweitert werden.