Investigation of luminescent materials with efficient photoluminescence(PL)and mechanoluminescence(ML)is significant for the development of both basic theories and industrial applications for new light sources,pressur...Investigation of luminescent materials with efficient photoluminescence(PL)and mechanoluminescence(ML)is significant for the development of both basic theories and industrial applications for new light sources,pressure sensors,and information security.In this study,we obtain a pair of isomorphic europium(Eu)^(3+)-containing coordination polymers(CPs),namely,[Eu(tfpd)_(3)(phen)]_(n)(1)and[Eu(tfpd)_(3)(bipy)]_(n)(2)(tfpd=4,4,4-trifluoro-4-pyridyl-1,3-diketonate,phen=1,10-phenanthroline,bipy=2,2'-bipyridine),which exhibit novel helical chain-like structures that can be extended to 3D supramolecular networks through moderate interchain interactions.The thermostable CPs simultaneously exhibit strong photoluminescence(PL)emissions with high quantum yields and excellent mechanoluminescence(ML)activity with an unusual anti-thermal quenching effect.Careful analyses of the CP crystal structures and optical performances,coupled with theoretical calculations,demonstrate that the PL emission depends on the asymmetric Eu^(3+)coordination spheres,whereas the ML activity is significantly correlated with molecular packing derived from appropriate interchain H-bonding interactions.As these CPs have highly efficient optical activities,they have promising potential applications in pressure sensing,anti-counterfeiting,and fingerprint recognition technologies.展开更多
基金supported by the National Natural Science Foundation of China(22463010,22063008)the National Natural Science Foundation of China(62275170)+9 种基金the Natural Science Foundation of Ningxia(2023AAC03227,2022AAC05002,2023AAC03183)the Project of Central Government Guides Local Science and Technology Development(2024FRD05053)the Key Research and Development Project of Ningxia(2023BEG03031)the Young Top-notch Talent Cultivation Program of Ningxiathe Discipline Project of Ningxia(NXYLXK2017A04)the support of Key-Area Research and Development Program of Guangdong Province(2024B0101080001)the Guangdong Provincial Science Fund for Distinguished Young Scholars(2022B1515020054)the Scientific Research Foundation as PhaseⅢConstruction of High-level University 2035 Plan(0000050101)the Proof-of-concept Project(000003011313)of Shenzhen Universitythe Medical-Engineering Interdisciplinary Research Foundation of Shenzhen University(2023YG031)。
文摘Investigation of luminescent materials with efficient photoluminescence(PL)and mechanoluminescence(ML)is significant for the development of both basic theories and industrial applications for new light sources,pressure sensors,and information security.In this study,we obtain a pair of isomorphic europium(Eu)^(3+)-containing coordination polymers(CPs),namely,[Eu(tfpd)_(3)(phen)]_(n)(1)and[Eu(tfpd)_(3)(bipy)]_(n)(2)(tfpd=4,4,4-trifluoro-4-pyridyl-1,3-diketonate,phen=1,10-phenanthroline,bipy=2,2'-bipyridine),which exhibit novel helical chain-like structures that can be extended to 3D supramolecular networks through moderate interchain interactions.The thermostable CPs simultaneously exhibit strong photoluminescence(PL)emissions with high quantum yields and excellent mechanoluminescence(ML)activity with an unusual anti-thermal quenching effect.Careful analyses of the CP crystal structures and optical performances,coupled with theoretical calculations,demonstrate that the PL emission depends on the asymmetric Eu^(3+)coordination spheres,whereas the ML activity is significantly correlated with molecular packing derived from appropriate interchain H-bonding interactions.As these CPs have highly efficient optical activities,they have promising potential applications in pressure sensing,anti-counterfeiting,and fingerprint recognition technologies.
