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首页> 外文期刊>Chemistry: A European journal >Luminescent Nitridophosphates CaP2N4:Eu2+, SrP2N4:Eu2+, BaP2N4:Eu2+, and BaSr2P6N12:Eu2+
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Luminescent Nitridophosphates CaP2N4:Eu2+, SrP2N4:Eu2+, BaP2N4:Eu2+, and BaSr2P6N12:Eu2+

机译：发光三磷酸磷化钙CaP2N4：Eu2 +，SrP2N4：Eu2 +，BaP2N4：Eu2 +和BaSr2P6N12：Eu2 +

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摘要

Nitridophosphates MP2N4:Eu2+ (M=Ca, Sr, Ba) and BaSr2P6N12:Eu2+ have been synthesized at elevated pressures and 1100-1300 degrees C starting from the corresponding azides and P3N5 with EuCl2 as dopant. Addition of NH4Cl as mineralizer allowed for the growth of single crystals. This led to the successful structure elucidation of a highly condensed nitridophosphate from single-crystal X-ray diffraction data (CaP2N4:Eu2+ (P6(3), no.173), a=16.847(2), c=7.8592(16)angstrom, V=1931.7(6)angstrom(3), Z=24, 2033 observed reflections, 176 refined parameters, wR(2)=0.096). Upon excitation by UV light, luminescence due to parity-allowed 4f(6)(F-7)5d(1)4f(7)(S-8(7/2)) transition was observed in the orange (CaP2N4:Eu2+, (max)=575nm), green (SrP2N4:Eu2+, (max)=529nm), and blue regions of the visible spectrum (BaSr2P6N12:Eu2+ and BaP2N4:Eu2+, (max)=450 and 460nm, respectively). Thus, the emission wavelength decreases with increasing ionic radius of the alkaline-earth ions. The corresponding full width at half maximum values (2240-2460cm(-1)) are comparable to those of other known Eu2+-doped (oxo)nitrides emitting in the same region of the visible spectrum. Following recently described quaternary Ba3P5N10Br:Eu2+, this investigation represents the first report on the luminescence of Eu2+-doped ternary nitridophosphates. Similarly to nitridosilicates and related oxonitrides, Eu2+-doped nitridophosphates may have the potential to be further developed into efficient light-emitting diode phosphors.
机译：从相应的叠氮化物和P3N5开始，以EuCl2作为掺杂剂，在高压和1100-1300℃下合成了三磷酸磷腈MP2N4：Eu2 +（M = Ca，Sr，Ba）和BaSr2P6N12：Eu2 +。加入NH 4 Cl作为矿化剂允许单晶的生长。这导致了从单晶X射线衍射数据（CaP2N4：Eu2 +（P6（3），No.173），a = 16.847（2），c = 7.8592（16）埃的成功阐明高浓度的亚硝酸磷酸盐的结构，V = 1931.7（6）埃（3），Z = 24，观察到2033个反射，176个精确参数，wR（2）= 0.096）。受到紫外线激发后，在橙色（CaP2N4：Eu2 +）中观察到由于奇偶校验允许的4f（6）（F-7）5d（1）4f（7）（S-8（7/2））发光。 （max）= 575nm），绿色（SrP2N4：Eu2 +，（max）= 529nm）和可见光谱的蓝色区域（BaSr2P6N12：Eu2 +和BaP2N4：Eu2 +，（max）分别为450和460nm）。因此，发射波长随着碱土离子的离子半径的增加而减小。相应的半峰全宽（2240-2460cm（-1））与在可见光谱的相同区域中发射的其他已知Eu2 +掺杂的（氧代）氮化物相当。继最近描述的季式Ba3P5N10Br：Eu2 +之后，这项研究代表了有关Eu2 +掺杂的三价亚硝基磷酸酯发光的首次报道。类似于亚硝酸硅酸盐和相关的氧氮化物，掺杂Eu2 +的亚硝基磷酸盐可能具有被进一步开发成高效发光二极管磷光体的潜力。

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