Department Chemie und Biochemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13(D), 81377 München, Germany.
Chem Commun (Camb). 2011 Jan 7;47(1):496-8. doi: 10.1039/c0cc02093a. Epub 2010 Oct 22.
Homoleptic frameworks of the formula [Sr(1-x)Eu(x)(Im)(2)] (1) (x = 0.01-1.0; Im(-) = imidazolate anion, C(3)H(3)N(2)(-)) are hybrid materials that exhibit an intensive green luminescence. Tuning of both emission wavelength and quantum yield is achieved by europium/strontium substitution so that a QE of 80% is reached at a Eu content of 5%. Even 100% pure europium imidazolate still shows 60% absolute quantum efficiency. Substitution of Sr/Eu shows that doping with metal cations can also be utilized for coordination compounds to optimize materials properties. The emission is finely tuneable in the region 495-508 nm via variation of the europium content. The series of frameworks [Sr(1-x)Eu(x)(Im)(2)] presents dense MOFs with the highest quantum yields reported for MOFs so far.
具有通式 [Sr(1-x)Eu(x)(Im)(2)]（1）（x = 0.01-1.0；Im(-) = 咪唑阴离子，C(3)H(3)N(2)(-))的同多金属框架是一种混合材料，具有强烈的绿色发光。通过铕/锶取代可以实现发射波长和量子产率的调谐，在 Eu 含量为 5%时达到 80%的 QE。即使是 100%纯的 Eu 咪唑，仍显示出 60%的绝对量子效率。Sr/Eu 的取代表明，金属阳离子的掺杂也可用于配位化合物以优化材料性能。通过改变 Eu 含量，可以在 495-508nm 区域内精细调节发射。[Sr(1-x)Eu(x)(Im)(2)] 系列的框架呈现出高密度的 MOFs，其量子产率是迄今为止报道的 MOFs 中最高的。
