Two novel complexes, namely {[Cd(AIP)(4,4'-bpy)]·1.3DMF}n(1) and [Cd(AIP)(2,2'- bpy)]n(2), have been synthesized through solvothermal reaction(H2AIP = 5-aminoisophthalic acid, 2,2'-bpy = 2,2'-bip...Two novel complexes, namely {[Cd(AIP)(4,4'-bpy)]·1.3DMF}n(1) and [Cd(AIP)(2,2'- bpy)]n(2), have been synthesized through solvothermal reaction(H2AIP = 5-aminoisophthalic acid, 2,2'-bpy = 2,2'-bipyridine, 4,4'-bpy = 4,4'-bipyridine, and DMF = N,N'-dimethylformamide) and structurally determined by single-crystal X-ray diffraction. Complex 1 shows a three-dimensional(3D) layer-pillar framework with rectangular channels, while complex 2 displays a two-dimensional(2D) wave net architecture. Furthermore, 1 and 2 were characterized by elemental analysis, infrared spectra(IR), thermal gravimetric analyses(TGA) and fluorescence measurements. The luminescent properties of 1 dispersed in various organic solvents have been investigated systematically, demonstrating high selectivity for acetone via the fluorescence quenching effect.展开更多
近红外光谱技术在安防监控、食品检测、生物成像、农业等领域具有重要应用价值,而开发出紧凑高效的近红外光源是其大规模商业应用的前提.荧光粉转换型近红外发光二极管(light emitting diodes,LED)光源具有结构紧凑、成本低、使用寿命...近红外光谱技术在安防监控、食品检测、生物成像、农业等领域具有重要应用价值,而开发出紧凑高效的近红外光源是其大规模商业应用的前提.荧光粉转换型近红外发光二极管(light emitting diodes,LED)光源具有结构紧凑、成本低、使用寿命长、发射光谱可调等优点,因此近些年受到广泛关注,其关键就在于开发出能被蓝光有效激发的高性能近红外荧光粉.本工作利用高温固相法制备了一种新型宽带近红外荧光粉 In_(2)BP_(3)O_(12):Cr^(3+),在 480 nm 激发下,荧光粉发射峰值位于 950 nm,光谱覆盖了 750~1350 nm 范围,半峰宽达到 210 nm.采用该荧光粉与商用蓝光 In Ga N LED 芯片封装,获得了具有宽带发射的近红外 LED 光源,在 60 mA 的驱动电流下,近红外光辐射功率为 5 mW.当采用该光源照射人的手掌,用近红外电感耦合器(charge coupled device,CCD)相机能够对手掌中的血管进行清晰的成像.上述结果表明该近红外荧光粉可用于制备基于蓝光芯片的宽带近红外 LED 光源,并在生物医学等领域具有潜在应用前景.展开更多
AlON:1.6 mol.%Er3+, x mol.%Yb3+(x=0, 2.6, 3.1, 3.6, 4.1, 4.6) phosphors were synthesized successfully by aluminothermic reduction and nitridation(ATRN) method and characterized by X-ray diffraction(XRD), scan...AlON:1.6 mol.%Er3+, x mol.%Yb3+(x=0, 2.6, 3.1, 3.6, 4.1, 4.6) phosphors were synthesized successfully by aluminothermic reduction and nitridation(ATRN) method and characterized by X-ray diffraction(XRD), scanning electron microscopy(FESEM) and upconversion photoluminescence(UCPL) emission spectra. Under the excitation of diode laser 980 nm, the green(556 nm) and red(655 nm) upconverted emissions were observed, attributed to the 4S3/2→4I15/2 and 4F9/2→4I15/2 transition of Er3+respectively. The emission intensity increased with increasing Yb3+ concentration due to the energy transfer(ET) between Yb3+ and Er3+. The upconverted emission reached the highest as x=3.6, and was pump-power dependent involving a two-photon process.展开更多
基金the National Natural Science Foundation of China(21501178)Natural Science Funds of Fujian Province(No.2014H0055)for financial support of this work
文摘Two novel complexes, namely {[Cd(AIP)(4,4'-bpy)]·1.3DMF}n(1) and [Cd(AIP)(2,2'- bpy)]n(2), have been synthesized through solvothermal reaction(H2AIP = 5-aminoisophthalic acid, 2,2'-bpy = 2,2'-bipyridine, 4,4'-bpy = 4,4'-bipyridine, and DMF = N,N'-dimethylformamide) and structurally determined by single-crystal X-ray diffraction. Complex 1 shows a three-dimensional(3D) layer-pillar framework with rectangular channels, while complex 2 displays a two-dimensional(2D) wave net architecture. Furthermore, 1 and 2 were characterized by elemental analysis, infrared spectra(IR), thermal gravimetric analyses(TGA) and fluorescence measurements. The luminescent properties of 1 dispersed in various organic solvents have been investigated systematically, demonstrating high selectivity for acetone via the fluorescence quenching effect.
文摘近红外光谱技术在安防监控、食品检测、生物成像、农业等领域具有重要应用价值,而开发出紧凑高效的近红外光源是其大规模商业应用的前提.荧光粉转换型近红外发光二极管(light emitting diodes,LED)光源具有结构紧凑、成本低、使用寿命长、发射光谱可调等优点,因此近些年受到广泛关注,其关键就在于开发出能被蓝光有效激发的高性能近红外荧光粉.本工作利用高温固相法制备了一种新型宽带近红外荧光粉 In_(2)BP_(3)O_(12):Cr^(3+),在 480 nm 激发下,荧光粉发射峰值位于 950 nm,光谱覆盖了 750~1350 nm 范围,半峰宽达到 210 nm.采用该荧光粉与商用蓝光 In Ga N LED 芯片封装,获得了具有宽带发射的近红外 LED 光源,在 60 mA 的驱动电流下,近红外光辐射功率为 5 mW.当采用该光源照射人的手掌,用近红外电感耦合器(charge coupled device,CCD)相机能够对手掌中的血管进行清晰的成像.上述结果表明该近红外荧光粉可用于制备基于蓝光芯片的宽带近红外 LED 光源,并在生物医学等领域具有潜在应用前景.
基金Project supported by National Natural Science Foundation of China(91022035)"One Hundred Talent Project"the Natural Science Foundation of Fujian Province(2014H0055)
文摘AlON:1.6 mol.%Er3+, x mol.%Yb3+(x=0, 2.6, 3.1, 3.6, 4.1, 4.6) phosphors were synthesized successfully by aluminothermic reduction and nitridation(ATRN) method and characterized by X-ray diffraction(XRD), scanning electron microscopy(FESEM) and upconversion photoluminescence(UCPL) emission spectra. Under the excitation of diode laser 980 nm, the green(556 nm) and red(655 nm) upconverted emissions were observed, attributed to the 4S3/2→4I15/2 and 4F9/2→4I15/2 transition of Er3+respectively. The emission intensity increased with increasing Yb3+ concentration due to the energy transfer(ET) between Yb3+ and Er3+. The upconverted emission reached the highest as x=3.6, and was pump-power dependent involving a two-photon process.