Furthermore, R-1-Eu and R-2-Sm show a strong triboluminescence (TL) phenomenon visible with the naked eye in daylight. Moreover, R-1-Eu/S-1-Eu and R-2-Sm/S-2-Sm show circularly polarized luminescence (CPL) properties. Particularly, the luminescence dissymmetry factors (glum) for R-2-Sm/S-2-Sm are larger than those for R-1-Eu/S-1-Eu despite the fact that SmIII complexes usually show poorer emission than EuIII
基于
氟化
β-二酮(Hbtfa)和对映体不对称N,N'-供体
配体(L R和L S),Λ-Eu(btfa)3的两个同手性Eu III和Sm III三(
β-二酮酸)对映体L R(R -1-Eu)/Δ-Eu(btfa)3 L S(S -1-Eu)和Λ-Sm(btfa)3 L R(R -2-Sm)/Δ-Sm(btfa)3大号小号(小号-2-SM)(btfa -= 4,4,4-三
氟-
1-苯基-1,3-丁二酮和L [R / L小号=( - )/(+) - 4,5-二pineno -
2,2'-联吡啶)的合成。电子圆二色性(
ECD)光谱证实了其对映体性质。R -1-Eu / S -1-Eu和R -2-Sm / S -2-Sm在固态和DCM中均表现出强烈的Eu III(红色)和Sm III(橙红色)离子特征发射具有长寿命和高发光量子产率。例如,R -1-Eu的总量子产率高达61%和53%,敏化效率值分别为82