We report the creation of a novel composition on the base of porous CaCO₃ microspheres loaded with both scintillating gadolinium orthovanadate nanoparticles doped with europium ions GdVO₄:Eu³⁺ (VNPs) and Methylene Blue (MB) photosensitizer molecules. It has been shown that upon both UV- and X-ray excitations of VNPs, an excitation energy transfer from VNPs to MB dye molecules takes place that is revealed in the donor VNPs luminescence intensity and lifetime decrease, as well as MB FRET-induced luminescence appearance. The rise time of the acceptor MB luminescence, which follows the donor decay time has been observed that allows distinguishing of nanosecond acceptor emission due to direct acceptor excitation from the much longer-lived sub-millisecond FRET-induced acceptor one. Using the rise time of acceptor luminescence, FRET efficiency (E = 59%) rate constant ($k_t=2.28·{10}^3{s}^{-1})$ and physical separation of the donor to acceptor within CaCO₃ microparticles ($r_{da}=2.45nm$) at the optimal acceptor concentration have been calculated. The efficiency of created CaCO₃@[email protected] composition in free radical generation has been analyzed.

我们报道了在多孔CaCO ₃微球的基础上创建的新型成分，该多孔CaCO ₃微球上都掺杂了euro离子GdVO ₄：Eu ³⁺掺杂的闪烁原or钒酸盐纳米颗粒。（VNP）和亚甲基蓝（MB）光敏剂分子。已显示，在VNP的紫外线和X射线激发下，发生了从VNP到MB染料分子的激发能量转移，这在供体VNP的发光强度和寿命降低以及MB FRET诱导的发光中得到揭示。外貌。已经观察到受体MB发光的上升时间紧随供体衰减时间，这使得可以将由于直接受体激发引起的纳秒受体发射与寿命更长的亚毫秒FRET诱导的受体之一区分开。利用受体发光的上升时间，FRET效率（E  =  59％）速率常数（${ķ}_{Ť}=2.28·{10}^3{s}^{-\mathrm{1个}}）$CaCO ₃微粒中供体与受体的分离和物理分离（${\mathrm{[R}}_{d\mathrm{一个}}=2.45ñ米$）在最佳受体浓度下已经计算出来。分析了所产生的CaCO ₃ @ [电子邮件保护的]组合物在自由基产生中的效率。