当前位置：
X-MOL 学术
›
Chem. Eur. J.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Sr[BeSi2N4]:Eu2+/Ce3+ and Eu[BeSi2N4]: Nontypical Luminescence in Highly Condensed Nitridoberyllosilicates
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-04-30 , DOI: 10.1002/chem.201800912 Philipp Strobel 1 , Volker Weiler 2 , Peter J. Schmidt 2 , Wolfgang Schnick 1
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-04-30 , DOI: 10.1002/chem.201800912 Philipp Strobel 1 , Volker Weiler 2 , Peter J. Schmidt 2 , Wolfgang Schnick 1
Affiliation
|
M[BeSi2N4] (M=Sr,Eu), crystallizing in the hexagonal space group P
2c, was synthesized from Sr(NH2)2, Be3N2, and “Si(NH)2” in W crucibles under a N2 atmosphere in a radio‐frequency furnace. The crystal structure was solved from powder X‐ray diffraction data by the charge‐flipping method (Sr[BeSi2N4]: a=4.86082(2), c=9.42264(4) Å, Z=2; Eu[BeSi2N4]: a=4.85848(1), c=9.41615(4) Å). M[BeSi2N4] contains a highly condensed rigid network of trigonal planar [BeN3] units that are connected to Si2N7 double tetrahedra by common vertices. M[BeSi2N4] (M=Sr,Eu) are the first examples of nitridoberyllosilicates and are isotypic to the oxoberyllate Sr[Be3O4]. Eu2+‐doped Sr[BeSi2N4] and Eu[BeSi2N4] show orange‐trapped exciton emission (λem=605 nm, fwhm ≈126 nm), whereas Ce3+‐doped samples of Sr[BeSi2N4] show nontypical yellowish‐orange luminescence. Sr[BeSi2N4] has a large band gap of ≈4.4 eV and shows high chemical and thermal stability. Eu2+‐doped beryllates with regular 4f65d1→4f7‐emission could be interesting for future application in LEDs upon doping with Eu2+ or Ce3+ due to large band gaps, rigid networks, and chemical and thermal stability.
中文翻译：
Sr [BeSi2N4]：Eu2 + / Ce3 +和Eu [BeSi2N4]：高缩合氮十二烷基硅酸盐中的非典型发光
由W中的Sr（NH 2）2，Be 3 N 2和“ Si（NH）2 ”合成在六方晶空间群P 2 c中结晶的M [BeSi 2 N 4 ]（M = Sr，Eu）N 2气氛下在射频炉中的坩埚。晶体结构通过粉末X射线衍射数据通过电荷翻转法（Sr [BeSi 2 N 4 ]：a = 4.86082（2），c = 9.42264（4）Å，Z = 2; Eu [BeSi 2 N 4 ]：a = 4.85848（1），c= 9.41615（4）Å）。M [BeSi 2 N 4 ]包含高度凝聚的三角形平面[BeN 3 ]单元的刚性网络，这些单元通过公共顶点连接到Si 2 N 7双四面体。M [BeSi 2 N 4 ]（M = Sr，Eu）是亚硝基铍基硅酸盐的第一个实例，与氧代铍酸酯Sr [Be 3 O 4 ]同型。的Eu 2+掺杂锶[BESI 2 Ñ 4 ]及Eu [BESI 2 Ñ 4 ]显示橙捕获的激子发光（λ EM = 605纳米，FWHM≈126纳米），而铈3+掺杂的Sr [BeSi 2 N 4 ]样品显示出非典型的黄橙色发光。Sr [BeSi 2 N 4 ]具有约4.4 eV的大带隙，并具有很高的化学稳定性和热稳定性。具有规则的4f 6 5d 1 →4f 7发射的Eu 2+掺杂的铍酸盐由于较大的带隙，刚性网络以及化学和热稳定性，对于将来在掺入Eu 2+或Ce 3+的LED中的应用可能是有趣的。
更新日期：2018-04-30
2c, was synthesized from Sr(NH2)2, Be3N2, and “Si(NH)2” in W crucibles under a N2 atmosphere in a radio‐frequency furnace. The crystal structure was solved from powder X‐ray diffraction data by the charge‐flipping method (Sr[BeSi2N4]: a=4.86082(2), c=9.42264(4) Å, Z=2; Eu[BeSi2N4]: a=4.85848(1), c=9.41615(4) Å). M[BeSi2N4] contains a highly condensed rigid network of trigonal planar [BeN3] units that are connected to Si2N7 double tetrahedra by common vertices. M[BeSi2N4] (M=Sr,Eu) are the first examples of nitridoberyllosilicates and are isotypic to the oxoberyllate Sr[Be3O4]. Eu2+‐doped Sr[BeSi2N4] and Eu[BeSi2N4] show orange‐trapped exciton emission (λem=605 nm, fwhm ≈126 nm), whereas Ce3+‐doped samples of Sr[BeSi2N4] show nontypical yellowish‐orange luminescence. Sr[BeSi2N4] has a large band gap of ≈4.4 eV and shows high chemical and thermal stability. Eu2+‐doped beryllates with regular 4f65d1→4f7‐emission could be interesting for future application in LEDs upon doping with Eu2+ or Ce3+ due to large band gaps, rigid networks, and chemical and thermal stability.
中文翻译：
Sr [BeSi2N4]：Eu2 + / Ce3 +和Eu [BeSi2N4]：高缩合氮十二烷基硅酸盐中的非典型发光
由W中的Sr（NH 2）2，Be 3 N 2和“ Si（NH）2 ”合成在六方晶空间群P 2 c中结晶的M [BeSi 2 N 4 ]（M = Sr，Eu）N 2气氛下在射频炉中的坩埚。晶体结构通过粉末X射线衍射数据通过电荷翻转法（Sr [BeSi 2 N 4 ]：a = 4.86082（2），c = 9.42264（4）Å，Z = 2; Eu [BeSi 2 N 4 ]：a = 4.85848（1），c
= 9.41615（4）Å）。M [BeSi 2 N 4 ]包含高度凝聚的三角形平面[BeN 3 ]单元的刚性网络，这些单元通过公共顶点连接到Si 2 N 7双四面体。M [BeSi 2 N 4 ]（M = Sr，Eu）是亚硝基铍基硅酸盐的第一个实例，与氧代铍酸酯Sr [Be 3 O 4 ]同型。的Eu 2+掺杂锶[BESI 2 Ñ 4 ]及Eu [BESI 2 Ñ 4 ]显示橙捕获的激子发光（λ EM = 605纳米，FWHM≈126纳米），而铈3+掺杂的Sr [BeSi 2 N 4 ]样品显示出非典型的黄橙色发光。Sr [BeSi 2 N 4 ]具有约4.4 eV的大带隙，并具有很高的化学稳定性和热稳定性。具有规则的4f 6 5d 1 →4f 7发射的Eu 2+掺杂的铍酸盐由于较大的带隙，刚性网络以及化学和热稳定性，对于将来在掺入Eu 2+或Ce 3+的LED中的应用可能是有趣的。
京公网安备 11010802027423号