Journal ArticleDOI
Composite fast scintillators based on high-Z fluorescent metal–organic framework nanocrystals
J Perego,I Villa,Alessandro Pedrini,E. C. Padovani,R Crapanzano,Anna Vedda,Christophe Dujardin,Charl X. Bezuidenhout,Silvia Bracco,Piero Sozzani,Angiolina Comotti,L. Gironi,M Beretta,Matteo Salomoni,Matteo Salomoni,Nicolaus Kratochwil,Nicolaus Kratochwil,Stefan Gundacker,Stefan Gundacker,Etiennette Auffray,Francesco Meinardi,Angelo Monguzzi +21 more
TLDR
In this paper, a prototype scintillator fabricated by embedding fluorescent metal-organic framework (MOF) nanocrystals in a polymer was presented, achieving an ultrafast scintillation rise time of about 50Abstract:
Scintillators, materials that produce light pulses upon interaction with ionizing radiation, are widely employed in radiation detectors. In advanced medical-imaging technologies, fast scintillators enabling a time resolution of tens of picoseconds are required to achieve high-resolution imaging at the millimetre length scale. Here we demonstrate that composite materials based on fluorescent metal–organic framework (MOF) nanocrystals can work as fast scintillators. We present a prototype scintillator fabricated by embedding MOF nanocrystals in a polymer. The MOF comprises zirconium oxo-hydroxy clusters, high-Z linking nodes interacting with the ionizing radiation, arranged in an orderly fashion at a nanometric distance from 9,10-diphenylanthracene ligand emitters. Their incorporation in the framework enables fast sensitization of the ligand fluorescence, thus avoiding issues typically arising from the intimate mixing of complementary elements. This proof-of-concept prototype device shows an ultrafast scintillation rise time of ~50 ps, thus supporting the development of new scintillators based on engineered fluorescent MOF nanocrystals. Composites of fluorescent metal–organic framework nanocrystals in a polymer are exploited to create fast scintillators with a rise time of about 50 ps.read more
Citations
More filters
Journal ArticleDOI
Energy Transfer in Metal–Organic Frameworks for Fluorescence Sensing
TL;DR: In this article , the authors focus on the recent five years of advances in ET-LMOF-based sensing materials, with an emphasis on photochemical and photophysical mechanisms, and discuss in detail possible energy transfer processes within a MOF structure or between MOFs and guest materials.
Journal ArticleDOI
Halogen Bonding: A New Platform for Achieving Multi-Stimuli-Responsive Persistent Phosphorescence.
Wenbo Dai,Xiao Hui Niu,Xin-zhou Wu,Yue Ren,Yongfeng Zhang,Gengchen Li,Han Su,Yunxiang Lei,Jia-Wen Xiao,Jianbing Shi,Bin Tong,Zhengxu Cai,Yuping Dong +12 more
TL;DR: In this article , intermolecular halogen bonding (CN…Br) was introduced into the host-guest RTP system, which promoted intersystem crossing and stabilized the triplet excitons, thus helping to achieve strong phosphorescence emission.
Nearly 100% energy transfer at the interface of metal-organic frameworks for X-ray imaging scintillators
Jian-Xin Wang,Luis Gutiérrez-Arzaluz,Xiaojia Wang,Maram Almalki,Jun Yin,Justyna Czaban-Jóźwiak,Osama Shekhah,Yuhai Zhang,Osman M. Bakr,Mohamed Eddaoudi,Omar F. Mohammed +10 more
TL;DR: In this article, the authors describe a highly efficient and reabsorption-free X-ray-harvesting system using luminescent metal-organic framework (MOF)-fluorescence chromophore composite films.
Journal ArticleDOI
Nearly 100% energy transfer at the interface of metal-organic frameworks for X-ray imaging scintillators
TL;DR: In this article , the authors describe a highly efficient and reabsorption-free X-ray-harvesting system using luminescent metal-organic framework (MOF)-fluorescence chromophore composite films.
Journal ArticleDOI
A Metal-Phenolic Nanosensitizer Performs Hydrogen Sulfide-Reprogrammed Oxygen Metabolism for Cancer Radiotherapy Intensification and Immunogenicity.
Jie Li,Lisi Xie,Wei Sang,Wenxi Li,Guohao Wang,Jie Yan,Zhan Zhang,Hao Tian,Quli Fan,Yu-ping Dai +9 more
TL;DR: A metal-phenolic nanosensitizer was integrated by an acid-sensitive hydrogen sulfide donor and generated H2S to reduce cellular oxygen consumption rate via mitochondrial respiration inhibiting, which reprogrammed oxygen metabolism for tumor oxygenation improvement.
References
More filters
Journal ArticleDOI
Functional porous coordination polymers.
TL;DR: The aim is to present the state of the art chemistry and physics of and in the micropores of porous coordination polymers, and the next generation of porous functions based on dynamic crystal transformations caused by guest molecules or physical stimuli.
Journal ArticleDOI
Reticular synthesis and the design of new materials
Omar M. Yaghi,Michael O'Keeffe,Nathan W. Ockwig,Hee K. Chae,Hee K. Chae,Mohamed Eddaoudi,Jaheon Kim +6 more
TL;DR: This work has shown that highly porous frameworks held together by strong metal–oxygen–carbon bonds and with exceptionally large surface area and capacity for gas storage have been prepared and their pore metrics systematically varied and functionalized.
Journal ArticleDOI
Hybrid porous solids: past, present, future
TL;DR: The state-of-the-art on hybrid porous solids, their advantages, their new routes of synthesis, the structural concepts useful for their 'design', aiming at reaching very large pores are presented.
Journal ArticleDOI
Luminescent Functional Metal–Organic Frameworks
Journal ArticleDOI
Metal-organic frameworks: functional luminescent and photonic materials for sensing applications.
TL;DR: This comprehensive review summarizes the topical developments in the field of luminescent MOF and MOF-based photonic crystals/thin film sensory materials.