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A Novel 3D Cd-based Luminescence Metal-organic Framework: Synthesis, Structure and Luminescent Sensing Properties 被引量:2
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作者 JU Ping ZHANG En-Sheng +2 位作者 WANG Xiao YANG Hua WANG Ji-Jiang 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2019年第9期1578-1584,共7页
A three-dimensional(3 D) Cd-based metal-organic framework(MOF), [Cd(H2 O)(PAA)]·(H2 O)2(complex 1) has been rationally designed and synthesized by using 4-(pyrimidin-5-yl)isophthalic acid(H2 PAA) and Cd(NO3)2... A three-dimensional(3 D) Cd-based metal-organic framework(MOF), [Cd(H2 O)(PAA)]·(H2 O)2(complex 1) has been rationally designed and synthesized by using 4-(pyrimidin-5-yl)isophthalic acid(H2 PAA) and Cd(NO3)2·4 H2 O under solvothermal conditions. The structure has been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, IR spectra, powder X-ray diffraction(PXRD) and thermogravimetric analyses(TGA). Single-crystal X-ray diffraction analyses reveal that complex 1 consists of a 3 D network with one-dimensional(1 D) channels. Moreover, 1 exhibits strong luminescent emission in solid state at room temperature. Fluorescence quenching was observed when treating complex 1 with picric acid(PA), 2,4-dinitrophenylhydrazine(2,4-DNPH) and p-nitroaniline(p-NA), revealing that the as-synthesized complex could be used as a luminescence sensor for the detection of PA, 2,4-DNPH and p-NA. 展开更多
关键词 cd-based MOF 4-(pyrimidin-5-yl) isophthalic acid crystal STRUCTURE LUMINESCENCE sensor
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Upstream Channel Utilization of CSMA/CD-Based Ethernet over Passive Optical Networks
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作者 Elaine Wong Chang-Joon Chae 《光学学报》 EI CAS CSCD 北大核心 2003年第S1期737-738,共2页
We demonstrate that an asynchronous CSMA/CD protocol with an optical loop-back star coupler can achieve high upstream channel utilizatbn in an Ethernet PON, readily supporting a large installed base of Ethernet 10Base... We demonstrate that an asynchronous CSMA/CD protocol with an optical loop-back star coupler can achieve high upstream channel utilizatbn in an Ethernet PON, readily supporting a large installed base of Ethernet 10BaseT and 100BaseT interfaces. 展开更多
关键词 CSMA on AS of Upstream Channel Utilization of CSMA/cd-based Ethernet over Passive Optical Networks ONU OLT OVER CD
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