A series of isomorphic salts[CN-BzPy][Cu_(x)Ni_(1−x)(mnt)_(2)](x=0–1;CN-BzPy^(+)=1-(4′-cyanobenzyl)pyridinium,mnt^(2−)=maleonitriledithiolate)were prepared and characterized by microanalysis(C,H and N elements),IR a...A series of isomorphic salts[CN-BzPy][Cu_(x)Ni_(1−x)(mnt)_(2)](x=0–1;CN-BzPy^(+)=1-(4′-cyanobenzyl)pyridinium,mnt^(2−)=maleonitriledithiolate)were prepared and characterized by microanalysis(C,H and N elements),IR and Raman spectroscopy,TG,and powder X-ray diffraction techniques.All salts crystallize in the monoclinic space group P2_(1)/n with similar cell parameters,and both[M(mnt)_(2)]−(M=Ni or Cu)anions and CN-BzPy^(+)cations form segregated and regular stacks.展开更多
Recently,low-dimensional copper(Ⅰ)-based halide has been considered as a potential substitute for its lead-based counterpart due to its environmental friendliness,facile preparation and superior lumine-scence perform...Recently,low-dimensional copper(Ⅰ)-based halide has been considered as a potential substitute for its lead-based counterpart due to its environmental friendliness,facile preparation and superior lumine-scence performance.In particular,as a representative efficient luminescent material,it shows great potential as a scintillator for X-ray detection.Herein,three organic copper(Ⅰ)halide single crystals were grown by incorporating a conjugated organic cation(4-benzylpyridine,4-bzpy)with copper(Ⅰ)iodide modules.The three compounds exhibit distinct crystal structure and properties.Notably,the zero-dimen-sional cubane-like(4-bzpy)4 Cu_(4)I_(4)shows a broadband emission with near-unity photoluminescence quantum yield(-99.7%)and a large Stokes shift(-216 nm).More importantly,it demonstrates an obvious X-ray response with a high light yield(-60948 photons per MeV)and a perfect linear relationship with the dose rate under X-ray irradiation.The highly efficient emission of(4-bzpy)4 Cu_(4)I_(4)clusters mainly orig-inates from the ligand-to-core charge transfer state.This work not only provides further understanding of the importance of crystal structure in the properties of organic copper(Ⅰ)halides,but also facilitates the design and fabrication of high-performance X-ray scintillators.展开更多
基金financially supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions and the National Natural Science Foundation of China(grant no.22073047).
文摘A series of isomorphic salts[CN-BzPy][Cu_(x)Ni_(1−x)(mnt)_(2)](x=0–1;CN-BzPy^(+)=1-(4′-cyanobenzyl)pyridinium,mnt^(2−)=maleonitriledithiolate)were prepared and characterized by microanalysis(C,H and N elements),IR and Raman spectroscopy,TG,and powder X-ray diffraction techniques.All salts crystallize in the monoclinic space group P2_(1)/n with similar cell parameters,and both[M(mnt)_(2)]−(M=Ni or Cu)anions and CN-BzPy^(+)cations form segregated and regular stacks.
基金support from the National Natural Science Foundation of China(Grant No.62305195)the Natural Science Foundation of Shandong Province(ZR2022QF036)the Opening Project of State Key Laboratory of Crystal Materials(Shandong University,KF2105).
文摘Recently,low-dimensional copper(Ⅰ)-based halide has been considered as a potential substitute for its lead-based counterpart due to its environmental friendliness,facile preparation and superior lumine-scence performance.In particular,as a representative efficient luminescent material,it shows great potential as a scintillator for X-ray detection.Herein,three organic copper(Ⅰ)halide single crystals were grown by incorporating a conjugated organic cation(4-benzylpyridine,4-bzpy)with copper(Ⅰ)iodide modules.The three compounds exhibit distinct crystal structure and properties.Notably,the zero-dimen-sional cubane-like(4-bzpy)4 Cu_(4)I_(4)shows a broadband emission with near-unity photoluminescence quantum yield(-99.7%)and a large Stokes shift(-216 nm).More importantly,it demonstrates an obvious X-ray response with a high light yield(-60948 photons per MeV)and a perfect linear relationship with the dose rate under X-ray irradiation.The highly efficient emission of(4-bzpy)4 Cu_(4)I_(4)clusters mainly orig-inates from the ligand-to-core charge transfer state.This work not only provides further understanding of the importance of crystal structure in the properties of organic copper(Ⅰ)halides,but also facilitates the design and fabrication of high-performance X-ray scintillators.
